Skip to main content

    Support

    Offers

U
user_d51c01
1st Topic
1st Like
1st Reply

Visitor

 • 

4 Messages

Wednesday, March 23rd, 2022 2:54 AM

Closed

Netgear Nighthawk C7800 - Daily drops in internet connection - Can someone PLEASE look at these logs to make sense of what is happening?

Hello-

It seems like the time keeps failing but I am just a no nothing, I need help from a smarter person. Thanks so Much for your consideration.

EVENT LOGS

2022-03-22, 18:41:22 Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-03-22, 18:41:11 Notice (6) DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2022-03-22, 18:39:50 Critical (3) Resetting the cable modem due to docsDevResetNow
2022-03-19, 13:48:19 Critical (3) SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2022-03-19, 13:46:46 Critical (3) Resetting the cable modem due to docsDevResetNow
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:41:47 Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:39:54 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:39:48 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:39:45 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:13:33 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:13:27 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:12:37 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:12:37 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:12:22 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:12:21 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:12:01 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:12:00 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:09:56 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:09:50 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
2022-02-12, 11:09:49 Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2022-02-11, 11:10:29 Critical (3) Resetting the cable modem due to docsDevResetNow
2022-02-09, 01:10:26 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
2022-01-30, 18:58:03 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;
Time Not Established Critical (3) No Ranging Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.1;

LOGS

[DoS attack: Echo char gen] from source: 144.217.24.15, port 6406, Wed, Mar 23, 2022 01:30:16
[DoS attack: Echo char gen] from source: 146.88.240.4, port 59400, Wed, Mar 23, 2022 00:35:52
[DoS attack: UDP Scan] from source: 223.71.167.165, port 5852, Tue, Mar 22, 2022 22:58:16
[DoS attack: UDP Scan] from source: 185.94.111.1, port 56219, Tue, Mar 22, 2022 20:14:20
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Tue, Mar 22, 2022 19:55:08
[DoS attack: UDP Scan] from source: 185.94.111.1, port 47238, Tue, Mar 22, 2022 17:57:47
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Tue, Mar 22, 2022 16:23:47
[DoS attack: Echo char gen] from source: 74.207.254.209, port 46227, Tue, Mar 22, 2022 11:05:57
[DoS attack: Echo char gen] from source: 74.82.47.33, port 47598, Tue, Mar 22, 2022 09:17:11
[DoS attack: Echo char gen] from source: 193.124.7.9, port 47055, Tue, Mar 22, 2022 08:05:14
[DoS attack: Echo char gen] from source: 71.6.232.5, port 55951, Tue, Mar 22, 2022 06:47:29
[DoS attack: Echo char gen] from source: 162.142.125.235, port 18529, Tue, Mar 22, 2022 06:30:00
[DoS attack: UDP Scan] from source: 193.124.7.9, port 37743, Tue, Mar 22, 2022 04:17:01
[DoS attack: UDP Scan] from source: 146.88.240.4, port 43702, Tue, Mar 22, 2022 03:54:37
[DoS attack: Echo char gen] from source: 146.88.240.4, port 44597, Tue, Mar 22, 2022 00:35:52
[DoS attack: UDP Scan] from source: 45.79.188.243, port 18386, Mon, Mar 21, 2022 22:11:13
[DoS attack: Echo char gen] from source: 50.116.63.132, port 51686, Mon, Mar 21, 2022 17:21:39
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Mon, Mar 21, 2022 15:50:10
[DoS attack: Echo char gen] from source: 52.73.169.169, port 45202, Mon, Mar 21, 2022 09:24:07
[DoS attack: UDP Scan] from source: 146.88.240.4, port 46679, Mon, Mar 21, 2022 03:49:58
[DoS attack: Echo char gen] from source: 64.62.197.117, port 53463, Mon, Mar 21, 2022 00:50:20
[DoS attack: Echo char gen] from source: 146.88.240.4, port 37561, Mon, Mar 21, 2022 00:35:55
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 23:41:05
[DoS attack: Echo char gen] from source: 45.148.10.81, port 49920, Sun, Mar 20, 2022 23:19:31
[DoS attack: Echo char gen] from source: 193.124.7.9, port 45681, Sun, Mar 20, 2022 22:30:25
[DoS attack: Echo char gen] from source: 66.240.236.109, port 46522, Sun, Mar 20, 2022 21:38:26
[DoS attack: UDP Scan] from source: 193.124.7.9, port 36724, Sun, Mar 20, 2022 20:22:37
[DoS attack: UDP Scan] from source: 185.94.111.1, port 52595, Sun, Mar 20, 2022 19:58:42
[DoS attack: Echo char gen] from source: 212.192.246.37, port 23926, Sun, Mar 20, 2022 18:46:10
[DoS attack: UDP Scan] from source: 45.148.10.81, port 39808, Sun, Mar 20, 2022 17:05:46
[DoS attack: Echo char gen] from source: 193.118.55.148, port 24715, Sun, Mar 20, 2022 17:02:22
[DoS attack: UDP Scan] from source: 185.94.111.1, port 35788, Sun, Mar 20, 2022 15:43:13
[DoS attack: Echo char gen] from source: 45.79.82.183, port 45778, Sun, Mar 20, 2022 15:11:33
[DoS attack: Echo char gen] from source: 179.43.163.108, port 44550, Sun, Mar 20, 2022 14:32:23
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 08:57:34
[DoS attack: UDP Scan] from source: 128.232.21.75, port 47689, Sun, Mar 20, 2022 07:43:12
[DoS attack: Echo char gen] from source: 103.214.4.138, port 58029, Sun, Mar 20, 2022 07:28:42
[DoS attack: Echo char gen] from source: 71.6.167.142, port 31743, Sun, Mar 20, 2022 06:19:44
[DoS attack: Echo char gen] from source: 74.82.47.22, port 26980, Sun, Mar 20, 2022 06:06:32
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 04:54:18
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 04:52:09
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 04:52:09
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 04:52:07
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 04:52:07
[DoS attack: UDP Scan] from source: 146.88.240.4, port 50182, Sun, Mar 20, 2022 04:12:12
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 02:23:23
[DHCP IP: (192.168.21.107)] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 02:16:43
[DHCP IP: (192.168.21.124)] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 01:46:40
[DHCP IP: (192.168.21.122)] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 01:46:34
[DHCP IP: (192.168.21.123)] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 01:46:34
[DHCP IP: (192.168.21.125)] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 01:46:33
[DHCP IP: (192.168.21.111)] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 01:27:06
[DHCP IP: (192.168.21.102)] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 01:20:09
[DHCP IP: (192.168.21.113)] to MAC address [Edited: "Personal Information"], Sun, Mar 20, 2022 01:20:09
[DoS attack: Echo char gen] from source: 146.88.240.4, port 48467, Sun, Mar 20, 2022 00:35:53
[DHCP IP: (192.168.21.100)] to MAC address [Edited: "Personal Information"], Sat, Mar 19, 2022 23:40:08
[DHCP IP: (192.168.21.105)] to MAC address [Edited: "Personal Information"], Sat, Mar 19, 2022 22:57:37
[DHCP IP: (192.168.21.104)] to MAC address [Edited: "Personal Information"], Sat, Mar 19, 2022 22:56:43
[DHCP IP: (192.168.21.121)] to MAC address [Edited: "Personal Information"], Sat, Mar 19, 2022 22:40:44
[DHCP IP: (192.168.21.118)] to MAC address [Edited: "Personal Information"], Sat, Mar 19, 2022 22:27:19
[DHCP IP: (192.168.21.101)] to MAC address [Edited: "Personal Information"], Sat, Mar 19, 2022 22:25:13
[DHCP IP: (192.168.21.110)] to MAC address [Edited: "Personal Information"], Sat, Mar 19, 2022 22:10:57
[DHCP IP: (192.168.21.106)] to MAC address [Edited: "Personal Information"], Sat, Mar 19, 2022 21:51:13
[Internet connected] IP address: [Edited: "Personal Information"], Sat, Mar 19, 2022 21:48:40
[Time synchronized with NTP server] Sat, Mar 19, 2022 21:48:36
[DHCP IP: (192.168.21.100)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:01:27
[DHCP IP: (192.168.21.120)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:01:14
[DHCP IP: (192.168.21.117)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:01:13
[DHCP IP: (192.168.21.108)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:00:53
[DHCP IP: (192.168.21.112)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:00:50
[DHCP IP: (192.168.21.119)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:00:50
[Initialized, firmware version: V6.01.07] Thu, Jan 01, 1970 00:00:14
[DoS attack: Echo char gen] from source: 216.218.206.121, port 47638, Sat, Mar 19, 2022 13:15:10
[DoS attack: Echo char gen] from source: 209.141.51.43, port 65215, Sat, Mar 19, 2022 08:11:16
[DoS attack: UDP Scan] from source: 146.88.240.4, port 49462, Sat, Mar 19, 2022 04:16:25
[DoS attack: Echo char gen] from source: 185.180.143.146, port 42764, Sat, Mar 19, 2022 02:07:41
[DoS attack: Echo char gen] from source: 146.88.240.4, port 33354, Sat, Mar 19, 2022 00:35:51
[DoS attack: UDP Scan] from source: 185.94.111.1, port 33371, Fri, Mar 18, 2022 17:19:37
[DoS attack: UDP Scan] from source: 185.94.111.1, port 48994, Fri, Mar 18, 2022 14:07:37
[DoS attack: Echo char gen] from source: 216.218.206.77, port 33277, Fri, Mar 18, 2022 11:09:19
[DoS attack: Echo char gen] from source: 104.156.155.9, port 45288, Fri, Mar 18, 2022 09:36:11
[DoS attack: Echo char gen] from source: 104.156.155.9, port 45288, Fri, Mar 18, 2022 09:11:04
[DoS attack: Echo char gen] from source: 49.51.96.93, port 35528, Fri, Mar 18, 2022 08:23:31
[DoS attack: Echo char gen] from source: 141.212.123.211, port 54733, Fri, Mar 18, 2022 08:11:33
[DoS attack: UDP Scan] from source: 146.88.240.4, port 53340, Fri, Mar 18, 2022 04:07:11
[DoS attack: Sync flood] from source: 179.56.74.137, port 8440, Fri, Mar 18, 2022 03:27:37
[DoS attack: Echo char gen] from source: 146.88.240.4, port 56589, Fri, Mar 18, 2022 00:35:45
[DoS attack: Sync flood] from source: 112.67.181.135, port 23522, Thu, Mar 17, 2022 18:47:01
[DoS attack: Echo char gen] from source: 45.137.23.144, port 47346, Thu, Mar 17, 2022 17:25:34
[DoS attack: Echo char gen] from source: 212.192.246.37, port 58735, Thu, Mar 17, 2022 14:34:46
[DoS attack: Echo char gen] from source: 193.163.125.97, port 46468, Thu, Mar 17, 2022 13:32:34
[DoS attack: Echo char gen] from source: 165.227.3.88, port 57491, Thu, Mar 17, 2022 06:20:44
[DoS attack: Echo char gen] from source: 64.62.197.67, port 53570, Thu, Mar 17, 2022 04:09:59
[DoS attack: UDP Scan] from source: 146.88.240.4, port 36685, Thu, Mar 17, 2022 03:52:31
[DoS attack: Sync flood] from source: 190.217.139.192, port 57262, Thu, Mar 17, 2022 03:32:19
[DoS attack: Echo char gen] from source: 185.156.73.91, port 47255, Thu, Mar 17, 2022 03:22:33
[DoS attack: Echo char gen] from source: 146.88.240.4, port 46601, Thu, Mar 17, 2022 00:35:49
[DoS attack: UDP Scan] from source: 71.6.233.244, port 17, Wed, Mar 16, 2022 20:56:05
[DoS attack: UDP Scan] from source: 71.6.233.174, port 19, Wed, Mar 16, 2022 15:57:21
[DoS attack: UDP Scan] from source: 185.94.111.1, port 60254, Wed, Mar 16, 2022 13:00:00
[DoS attack: Echo char gen] from source: 80.82.77.139, port 27221, Wed, Mar 16, 2022 11:14:57
[DoS attack: UDP Scan] from source: 185.94.111.1, port 54823, Wed, Mar 16, 2022 10:49:36
[DoS attack: Sync flood] from source: 181.226.239.13, port 35289, Wed, Mar 16, 2022 09:19:47
[DoS attack: Echo char gen] from source: 185.156.73.91, port 40426, Wed, Mar 16, 2022 08:09:08
[DHCP IP: (192.168.21.107)] to MAC address [Edited: "Personal Information"], Wed, Mar 16, 2022 06:49:40
[DoS attack: Echo char gen] from source: 185.156.73.91, port 40426, Wed, Mar 16, 2022 04:41:31
[DoS attack: UDP Scan] from source: 146.88.240.4, port 41166, Wed, Mar 16, 2022 04:40:41
[DoS attack: Echo char gen] from source: 184.105.247.202, port 48749, Wed, Mar 16, 2022 03:17:55
[DoS attack: Echo char gen] from source: 146.88.240.4, port 55923, Wed, Mar 16, 2022 00:35:44
[DoS attack: Sync flood] from source: 31.43.185.3, port 65532, Tue, Mar 15, 2022 22:46:03
[DoS attack: Sync flood] from source: 179.56.201.199, port 34345, Tue, Mar 15, 2022 16:32:46
[DoS attack: Echo char gen] from source: 185.156.73.91, port 54514, Tue, Mar 15, 2022 13:50:01
[DoS attack: Echo char gen] from source: 43.133.0.177, port 35510, Tue, Mar 15, 2022 11:33:19
[DoS attack: UDP Scan] from source: 137.184.184.92, port 44650, Tue, Mar 15, 2022 10:08:44
[DoS attack: Sync flood] from source: 181.226.234.164, port 22807, Tue, Mar 15, 2022 09:35:42
[DoS attack: Echo char gen] from source: 80.82.77.245, port 58107, Tue, Mar 15, 2022 06:03:18
[DoS attack: UDP Scan] from source: 146.88.240.4, port 39992, Tue, Mar 15, 2022 04:20:57
[DoS attack: Echo char gen] from source: 184.105.139.73, port 60940, Tue, Mar 15, 2022 04:16:44
[DoS attack: Echo char gen] from source: 71.6.232.5, port 34892, Tue, Mar 15, 2022 02:57:31
[DoS attack: Echo char gen] from source: 185.216.140.31, port 43913, Tue, Mar 15, 2022 01:52:52
[DoS attack: Sync flood] from source: 201.220.110.154, port 3538, Tue, Mar 15, 2022 00:57:31
[DoS attack: Echo char gen] from source: 146.88.240.4, port 55734, Tue, Mar 15, 2022 00:35:25
[DoS attack: Sync flood] from source: 82.157.10.217, port 53713, Mon, Mar 14, 2022 21:38:11
[DoS attack: Sync flood] from source: 147.78.47.189, port 65533, Mon, Mar 14, 2022 20:02:44
[DoS attack: Echo char gen] from source: 80.78.25.31, port 42001, Mon, Mar 14, 2022 19:25:49
[DoS attack: Sync flood] from source: 181.226.114.43, port 60826, Mon, Mar 14, 2022 18:34:26
[DoS attack: Echo char gen] from source: 195.230.103.243, port 52180, Mon, Mar 14, 2022 15:07:26
[DoS attack: Echo char gen] from source: 185.156.73.91, port 44449, Mon, Mar 14, 2022 14:08:14
[DoS attack: UDP Scan] from source: 185.94.111.1, port 54657, Mon, Mar 14, 2022 09:43:24
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Mon, Mar 14, 2022 07:38:18
[DoS attack: UDP Scan] from source: 185.94.111.1, port 53291, Mon, Mar 14, 2022 04:43:55
[DoS attack: Echo char gen] from source: 185.156.73.91, port 44449, Mon, Mar 14, 2022 04:41:11
[DoS attack: UDP Scan] from source: 146.88.240.4, port 44664, Mon, Mar 14, 2022 03:55:13
[DHCP IP: ([Edited: "Personal Information"])] to MAC address [Edited: "Personal Information"], Mon, Mar 14, 2022 01:41:11
[DoS attack: Echo char gen] from source: 64.62.197.80, port 21542, Mon, Mar 14, 2022 01:31:36
[DoS attack: Echo char gen] from source: 172.105.111.65, port 55626, Mon, Mar 14, 2022 01:21:08
[DoS attack: Echo char gen] from source: 52.73.169.169, port 45686, Mon, Mar 14, 2022 00:49:47
[DoS attack: Echo char gen] from source: 146.88.240.4, port 49824, Mon, Mar 14, 2022 00:35:16
[DoS attack: Echo char gen] from source: 185.142.236.35, port 31743, Sun, Mar 13, 2022 21:57:04
[DoS attack: Echo char gen] from source: 193.124.7.9, port 40758, Sun, Mar 13, 2022 21:11:37
[DHCP IP: (192.168.21.121)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 19:31:05
[DHCP IP: (192.168.21.116)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 19:09:32
[DHCP IP: (192.168.21.110)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 18:00:05
[DHCP IP: (192.168.21.109)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 17:41:35
[DoS attack: Echo char gen] from source: 45.137.23.144, port 39975, Sun, Mar 13, 2022 17:05:29
[DoS attack: Sync flood] from source: 179.57.128.90, port 58663, Sun, Mar 13, 2022 17:04:05
[DoS attack: Sync flood] from source: 179.56.0.24, port 6912, Sun, Mar 13, 2022 14:36:11
[DoS attack: Echo char gen] from source: 167.94.138.143, port 25940, Sun, Mar 13, 2022 14:33:20
[DoS attack: UDP Scan] from source: 193.124.7.9, port 57656, Sun, Mar 13, 2022 12:47:47
[DoS attack: Sync flood] from source: 190.211.7.62, port 24686, Sun, Mar 13, 2022 11:21:25
[DoS attack: Echo char gen] from source: 185.156.73.91, port 59387, Sun, Mar 13, 2022 10:52:16
[DoS attack: Sync flood] from source: 181.226.234.164, port 2615, Sun, Mar 13, 2022 10:21:44
[DoS attack: Sync flood] from source: 201.186.20.20, port 34663, Sun, Mar 13, 2022 08:20:18
[DHCP IP: (192.168.21.107)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 07:35:25
[DHCP IP: (192.168.21.126)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 07:34:10
[DHCP IP: (192.168.21.127)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 07:34:10
[DHCP IP: (192.168.21.129)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 07:34:10
[DHCP IP: (192.168.21.128)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 07:34:06
[DHCP IP: (192.168.21.108)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 07:15:48
[DoS attack: Sync flood] from source: 179.57.145.32, port 65333, Sun, Mar 13, 2022 07:04:55
[DHCP IP: (192.168.21.106)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 06:03:08
[DoS attack: Sync flood] from source: 201.186.132.173, port 16221, Sun, Mar 13, 2022 05:52:43
[DHCP IP: (192.168.21.103)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 04:17:18
[DoS attack: Sync flood] from source: 181.226.45.90, port 31070, Sun, Mar 13, 2022 04:03:37
[DoS attack: UDP Scan] from source: 146.88.240.4, port 48292, Sun, Mar 13, 2022 03:48:23
[DoS attack: Sync flood] from source: 179.57.141.99, port 58062, Sun, Mar 13, 2022 03:25:43
[DoS attack: Sync flood] from source: 190.217.137.241, port 18497, Sun, Mar 13, 2022 03:05:18
[DHCP IP: (192.168.21.102)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 03:04:26
[DHCP IP: (192.168.21.105)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 03:02:57
[DHCP IP: (192.168.21.130)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 03:02:36
[DHCP IP: (192.168.21.101)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 03:02:02
[DoS attack: Echo char gen] from source: 64.62.197.53, port 49401, Sun, Mar 13, 2022 02:57:13
[DHCP IP: (192.168.21.123)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:51:14
[DHCP IP: (192.168.21.125)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:51:07
[DHCP IP: (192.168.21.122)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:51:07
[DHCP IP: (192.168.21.124)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:51:01
[DHCP IP: (192.168.21.104)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:41:55
[DHCP IP: (192.168.21.113)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:35:48
[DHCP IP: (192.168.21.111)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:35:47
[DHCP IP: (192.168.21.120)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:22:07
[DHCP IP: (192.168.21.117)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:22:07
[DoS attack: Sync flood] from source: 179.57.226.205, port 18051, Sun, Mar 13, 2022 02:21:00
[DHCP IP: (192.168.21.118)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:07:59
[DHCP IP: (192.168.21.100)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 02:07:49
[Internet connected] IP address: 73.252.220.125, Sun, Mar 13, 2022 02:05:10
[Time synchronized with NTP server] Sun, Mar 13, 2022 02:05:08
[DHCP IP: (192.168.21.106)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:01:18
[DHCP IP: (192.168.21.115)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:00:54
[DHCP IP: (192.168.21.103)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:00:52
[DHCP IP: (192.168.21.119)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:00:43
[DHCP IP: (192.168.21.112)] to MAC address [Edited: "Personal Information"], Thu, Jan 01, 1970 00:00:43
[Initialized, firmware version: V6.01.07] Thu, Jan 01, 1970 00:00:14
[DoS attack: Sync flood] from source: 190.217.136.28, port 49565, Sun, Mar 13, 2022 01:38:39
[DoS attack: Echo char gen] from source: 66.240.236.116, port 33612, Sun, Mar 13, 2022 01:36:30
[DoS attack: Sync flood] from source: 190.211.52.26, port 61935, Sun, Mar 13, 2022 01:28:38
[DoS attack: Sync flood] from source: 179.57.42.33, port 30309, Sun, Mar 13, 2022 01:09:00
[DoS attack: Sync flood] from source: 200.126.115.127, port 44360, Sun, Mar 13, 2022 00:54:56
[DoS attack: Echo char gen] from source: 146.88.240.4, port 57536, Sun, Mar 13, 2022 00:35:15
[DoS attack: UDP Scan] from source: 45.148.10.59, port 59683, Sun, Mar 13, 2022 00:34:39
[DHCP IP: (192.168.21.100)] to MAC address [Edited: "Personal Information"], Sun, Mar 13, 2022 00:17:43
[DoS attack: Sync flood] from source: 181.226.33.230, port 47076, Sun, Mar 13, 2022 00:02:20
[DoS attack: Sync flood] from source: 181.226.181.99, port 35379, Sat, Mar 12, 2022 23:45:33
[DoS attack: Sync flood] from source: 201.187.78.174, port 60802, Sat, Mar 12, 2022 23:34:06
[DoS attack: Sync flood] from source: 201.186.114.125, port 30381, Sat, Mar 12, 2022 23:14:03
[DoS attack: Sync flood] from source: 201.220.110.110, port 1117, Sat, Mar 12, 2022 22:56:31
[DoS attack: UDP Scan] from source: 183.136.225.9, port 28499, Sat, Mar 12, 2022 22:49:26
[DoS attack: Sync flood] from source: 190.217.204.117, port 64624, Sat, Mar 12, 2022 22:41:30
[DoS attack: Sync flood] from source: 190.121.98.28, port 31275, Sat, Mar 12, 2022 22:25:41
[DoS attack: Sync flood] from source: 181.226.153.67, port 35193, Sat, Mar 12, 2022 21:52:32
[DoS attack: Echo char gen] from source: 45.148.10.59, port 39122, Sat, Mar 12, 2022 21:48:51
[DoS attack: Sync flood] from source: 190.211.10.230, port 14353, Sat, Mar 12, 2022 21:38:58
[DoS attack: Sync flood] from source: 181.226.148.226, port 55977, Sat, Mar 12, 2022 21:24:40
[DoS attack: Sync flood] from source: 190.95.29.96, port 48984, Sat, Mar 12, 2022 20:57:46
[DoS attack: UDP Scan] from source: 193.124.7.9, port 49839, Sat, Mar 12, 2022 20:53:47
[DoS attack: Sync flood] from source: 179.57.227.169, port 5165, Sat, Mar 12, 2022 20:30:08
[DoS attack: Echo char gen] from source: 193.124.7.9, port 42106, Sat, Mar 12, 2022 20:18:18
[DoS attack: Sync flood] from source: 179.56.109.39, port 14701, Sat, Mar 12, 2022 19:46:38
[DoS attack: Sync flood] from source: 179.56.108.98, port 53431, Sat, Mar 12, 2022 19:35:56
[DoS attack: UDP Scan] from source: 51.195.60.135, port 27015, Sat, Mar 12, 2022 19:32:07
[DoS attack: Sync flood] from source: 181.226.210.111, port 12230, Sat, Mar 12, 2022 18:53:58
[DoS attack: Sync flood] from source: 190.183.244.3, port 32268, Sat, Mar 12, 2022 18:42:58
[DoS attack: Sync flood] from source: 201.186.65.243, port 36575, Sat, Mar 12, 2022 18:30:13
[DoS attack: Sync flood] from source: 179.57.3.57, port 19065, Sat, Mar 12, 2022 18:19:29
[DoS attack: Sync flood] from source: 179.56.154.176, port 33249, Sat, Mar 12, 2022 18:07:06
[DoS attack: Sync flood] from source: 190.217.238.120, port 43025, Sat, Mar 12, 2022 17:50:24
[DoS attack: UDP Scan] from source: 89.248.163.176, port 46745, Sat, Mar 12, 2022 17:39:07
[DoS attack: Sync flood] from source: 190.211.2.173, port 30513, Sat, Mar 12, 2022 17:34:27
[DoS attack: Sync flood] from source: 190.121.37.207, port 28553, Sat, Mar 12, 2022 17:19:39
[DoS attack: Sync flood] from source: 179.57.40.35, port 28758, Sat, Mar 12, 2022 17:03:46
[DoS attack: Echo char gen] from source: 203.159.80.153, port 33928, Sat, Mar 12, 2022 17:00:14
[DoS attack: Sync flood] from source: 190.217.165.112, port 44904, Sat, Mar 12, 2022 16:39:31
[DoS attack: Sync flood] from source: 190.215.25.40, port 15197, Sat, Mar 12, 2022 16:25:05
[DoS attack: Sync flood] from source: 190.217.230.126, port 12332, Sat, Mar 12, 2022 16:11:31
[DoS attack: Sync flood] from source: 181.226.22.216, port 4052, Sat, Mar 12, 2022 15:57:41
[DoS attack: Sync flood] from source: 179.56.69.254, port 12063, Sat, Mar 12, 2022 15:43:15
[DoS attack: Sync flood] from source: 181.226.63.172, port 38898, Sat, Mar 12, 2022 15:29:42
[DoS attack: Sync flood] from source: 190.211.53.100, port 34095, Sat, Mar 12, 2022 15:17:59
[DoS attack: Sync flood] from source: 179.57.141.99, port 26963, Sat, Mar 12, 2022 14:55:33
[DoS attack: Sync flood] from source: 201.186.134.206, port 56992, Sat, Mar 12, 2022 14:25:02
[DoS attack: Sync flood] from source: 179.57.52.228, port 4818, Sat, Mar 12, 2022 14:09:08

POWER

<tabindex=-1>Downstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords
1 Locked QAM256 20 507000000 Hz 3.9 dBmV 41.0 dB 21987220 0 0
2 Locked QAM256 4 405000000 Hz 4.8 dBmV 41.9 dB 21047667 0 0
3 Locked QAM256 5 411000000 Hz 5.0 dBmV 42.0 dB 21051408 0 0
4 Locked QAM256 6 417000000 Hz 4.8 dBmV 41.9 dB 21040704 0 0
5 Locked QAM256 7 423000000 Hz 4.7 dBmV 41.8 dB 21057717 0 0
6 Locked QAM256 8 429000000 Hz 4.7 dBmV 41.8 dB 21061854 0 0
7 Locked QAM256 9 435000000 Hz 4.7 dBmV 41.8 dB 21065466 0 0
8 Locked QAM256 10 441000000 Hz 4.5 dBmV 41.7 dB 21069005 0 0
9 Locked QAM256 11 447000000 Hz 4.5 dBmV 41.6 dB 21072813 0 0
10 Locked QAM256 12 453000000 Hz 4.4 dBmV 41.5 dB 21076603 0 0
11 Locked QAM256 13 459000000 Hz 4.4 dBmV 41.5 dB 21080489 0 0
12 Locked QAM256 14 465000000 Hz 4.4 dBmV 41.3 dB 21083999 0 0
13 Locked QAM256 15 471000000 Hz 4.2 dBmV 41.2 dB 21087714 0 0
14 Locked QAM256 16 477000000 Hz 4.3 dBmV 41.2 dB 21091696 0 0
15 Locked QAM256 17 483000000 Hz 4.1 dBmV 41.3 dB 21095287 0 0
16 Locked QAM256 18 489000000 Hz 3.9 dBmV 41.1 dB 21098915 0 0
17 Locked QAM256 19 495000000 Hz 3.8 dBmV 41.0 dB 21102803 0 0
18 Locked QAM256 21 513000000 Hz 3.8 dBmV 41.1 dB 21106502 0 0
19 Locked QAM256 22 519000000 Hz 3.6 dBmV 40.9 dB 21110254 0 0
20 Locked QAM256 23 525000000 Hz 3.7 dBmV 41.0 dB 21113947 0 0
21 Locked QAM256 24 531000000 Hz 3.7 dBmV 41.1 dB 21117709 0 0
22 Locked QAM256 25 537000000 Hz 3.6 dBmV 41.0 dB 21121569 0 0
23 Locked QAM256 26 543000000 Hz 3.5 dBmV 40.9 dB 21125284 0 0
24 Locked QAM256 27 549000000 Hz 3.3 dBmV 39.4 dB 21128962 0 0
25 Locked QAM256 28 555000000 Hz 3.4 dBmV 36.3 dB 21132727 0 0
26 Locked QAM256 29 561000000 Hz 3.2 dBmV 39.3 dB 21136480 0 0
27 Locked QAM256 30 567000000 Hz 3.3 dBmV 38.4 dB 21140131 0 0
28 Locked QAM256 31 573000000 Hz 3.3 dBmV 39.9 dB 21143917 0 0
29 Locked QAM256 32 579000000 Hz 3.5 dBmV 40.0 dB 21147763 0 0
30 Locked QAM256 33 585000000 Hz 3.5 dBmV 40.7 dB 21163673 0 0
31 Locked QAM256 34 591000000 Hz 3.6 dBmV 40.5 dB 21150922 0 0
32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 0
<tabindex=-1>Upstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power
1 Locked ATDMA 1 16400000 Hz 42.5 dBmV
2 Locked ATDMA 2 22800000 Hz 42.0 dBmV
3 Locked ATDMA 3 29200000 Hz 42.0 dBmV
4 Locked ATDMA 4 35600000 Hz 41.5 dBmV
5 Not Locked Unknown 0 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Hz 0.0 dBmV

Question

 • 

Updated 

3 years ago

 • Edited

867

3

Accepted Solution

BruceW

Gold Problem Solver

 • 

26.3K Messages

3 years ago

... C7800 - Daily drops ... It seems like the time keeps failing ...

The event log "Time Not Established" entries appear because the gateway's clock is cleared to Jan 01 1970 at 00:00:00 when it resets. Here the reset in response to the "docsDevResetNow" command on 2022-03-22 at 18:39:50 is followed by 3 "Time Not Established" entries. "docsDevResetNow" is a reset command sent by Comcast, either initiated by them or in response to a user "reset modem" request in My Account. Timestamps return a minute later at 18:41:11 after the gateway contacts Comcast's timer server and updates its date and time. This is common behavior during a reset.

The "LOGS" entries posted are not useful in diagnosing service drops as they are firewall and router "housekeeping" information.

The signal levels posted are all OK, but there are other signals that the gateway does not report, and there may be an intermittent problem. 

What is your Internet plan speed? Comcast rates the C7800 for use with plan speeds "Up to 948 Mbps" (see https://www.xfinity.com/support/devices) .

Please see Internet Troubleshooting Tips. If you can't find the problem have Comcast back out to locate and correct the it. By taking your money they obligate themselves to provide you with workable Internet service as long as you are using an approved device, whether that device is rented from Comcast or customer owned. Keep leaning on them until they fix this!

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post (by scrolling down to "Comment on this post here...") the author of the post you are Commenting on is notified of your response. But if you Reply, the author of the post you are Replying to is NOT notified and may not be aware of your response.

(edited)

1

user_d51c01

Visitor

 • 

4 Messages

@BruceW​ thank you, the guide is very helpful

3 years ago

0

user_d51c01

Visitor

 • 

4 Messages

3 years ago

I realize this is a lot to ask, I had Comcast out and they looked at the line to the house and said it was fine. They told me that because I bought my router they won't help me with it.

0

0

user_d51c01

Visitor

 • 

4 Messages

3 years ago

Thank you for your help

0

0

forum icon

New to the Community?

Start Here