9 Messages
Port forwarding getting ACK then RST and failing
I am having the same issue reported by hundreds of other customers. I am trying to expose the port 3000 of my internal IP 10
0.0.243 but i am getting connection refused even after turning off the gateway firewall and adding firewall rules for port 3000.
I tried everything, spent hours with xfinity support, they sent a technician to replace the modem, and no luck...basically all the network computerd using fixed IPs are not available for port forwarding, and if i change back to DHCP I still get an ACK and then refusal (RST) by the host machine , which is in same network segment of the hosted VMs. I can see that I am being terminated by the host machine, who sends this RST immediatelly upon receiving a request from an external ip. (Everyrhing works fine if the request comes from an internal ip). I am wondering if I need to buy my own router or if I need to cancel my Xfinity contract and go somewhere else. I am blocked for 3 days now and need immediate assistance.
Thanks,
user_tseuv3
9 Messages
7 months ago
I tried with xb7 and xb8, and have the same issue.
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XfinityChelseaB
Official Employee
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1.1K Messages
7 months ago
Hello @user_tseuv3 ,Thanks so much for taking a moment out of your day to leave a post on our community forum. Are you still having trouble with your port forwarding concern?
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user_tseuv3
9 Messages
7 months ago
@XfinityJamesC , thanks for the reply. I had 2 technicians coming here this week, as well as long hours of support, but my speed still at 100mbps... We activated 3 times, but it didnt work... I found a thread with someone with same issue on the G36. This person engaged with Arris support and they told him that Arris modems need to have Upload Power level above 45 (i don't remember the power level for downlosds) to perform well, otherwise the signal could get lower than the noise, causing lots of retransmission of packets... In fact, my WinPcap shows several retransmitted packets...this energy seems to be provided by xfinity on the Coaxial cable, so there is no way to modulate it on my side...So, XB7 and XB8 needs less energy(signal) to work or the new activation had put me in an IP linked to xfinity via another route, which has more noise/less power... One of the technicians took a measurement of my signal, and opened a ticket. I still don't have a diagnostic from the support. Will update here when I have it, so others may have some tips on how to troubleshoot issus with BYOD.
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user_tseuv3
9 Messages
7 months ago
So, i have tested both brand new Arris G36 and The Netgear nighthawk CAX80, and both give me the same 5mbps upload... Surprisingly, I reactivated my XB7, and it immediatelly gavw me 110mbps upload... There is something wrong on Xfinity side... Unfortunately, the XB7 is not doing the port forwarding, even when I change the network adapter to use DHCP (when i do this, i see the device on the list, but it doesnt honor the rule...Now. I am stuck with a performing cable modem that doesn't do port forwarding, or the other modems, which can do the port forwarding but, somehow, are being capped on 5mbps upload .. Any ideas how to go about it? I like Xfinity and would like to stay on the family, but my options are running out...
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user_yabjyo
1 Message
6 months ago
Port forward will not work with either xfinity device or your own device. I have tried with their XBT modem, and netgear's CM1100 and CM1200. Somehow it worked with CM1200 for only one day and kept me in circles with agent chat, technical support call. Right now I am waiting for technical support executive since 1hr 15 min, but no response. It is better move out of this carrier. I tried with other leading provider, it is working there flawlessly in bridge mode with my own router. Help me get out this contract for no port forward service available.
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