Visitor
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1 Message
DoS Attack and Dropped Wifi
I have a NetGear router c7000. I am been having issues with the Wi-Fi going down (a few minutes at a time). I checked the logs and when internet goes down, there seems to be DoS attacks lists. How can I stop this from happening? The Disable Port Scan and DoS Protection box was checked. I unchecked it and the issue is still happening. From what I am reading, the 75. source is a Comcast server and that the "attacks" are false positives. How do I stop the Wi-Fi from being dropped? Any help would be awesome. Thanks!
[DoS attack: TCP- or UDP-based Port Scan] from 75.75.75.75, port 531Tue May 16 05:00:05 202371.58.81.166:5828975.75.75.75:53
[DoS attack: TCP- or UDP-based Port Scan] from 75.75.76.76, port 531Tue May 16 04:51:51 202371.58.81.166:6231975.75.76.76:53
[DoS attack: SYN Flood] from 63.251.114.137, port 4431Tue May 16 04:33:51 2023192.168.0.41:5190263.251.114.137:443
flatlander3
Problem Solver
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1.5K Messages
2 years ago
The 75.75.x.x addresses are comcast DNS. No, probably not a DoS attack.
The sync flood is a server block in Atlanta. Maybe an infected VM and just bot traffic, or perhaps you are trying to pull information from them and your connection is struggling (breaking active state connections).
What's the rest of your connection look like? Take a look here: https://forums.xfinity.com/conversations/your-home-network/internet-troubleshooting-tips/602dae4ac5375f08cde52ea0 Pay particular attention to signal power (up and down), errors -- both correctable and uncorrectable, SNR. Channels failing to connect or dropping. Error logs can help too. If you are dying for minutes at a time, you may also be spontaneously rebooting too.
You can post the signal table and error logs here, but you have to redact the MAC addresses in the error log or the forum bot will mark it private and nobody will see it.
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CCDanny
Recognized Contributor
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238 Messages
2 years ago
@Jennyppp Thanks for joining our amazing community here at the Xfinity Forums. We have amazing official employees, experts, and our community members like yourself here to help with issues like your dropped connection.
@flatlander3 is correct and the request they made for the signal table and error logs without the specific MAC adresses is great and the perfect place to start! I told you we have a great community!
If you ever have a security concern you can visit oir website https://internet-security-site-web.ho-g3.cf.comcast.net/help/report-abuse
The Customer Security Assurance organization has been established to ensure a safe and secure online experience for Comcast customers. This team is a dedicated group of security professionals who respond to issues pertaining to phishing, spam, infected computers (commonly referred to as bots), online fraud and other security issues.
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EG
Expert
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110.4K Messages
2 years ago
@Jennyppp
You stated that your "WiFi is going down". As a test, does a computer / device that is hardwired directly to the C7000 with an ethernet cable have the same problem ?
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