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trigger113's avatar
trigger113
Tutor
Jan 23, 2016

netgear C3700-100NAS sporatic web browsing issues (able to ping / not able to browse).

I have a C3700-100NAS Router/Modem for about 3 months now with comcast as my Internet Service Provider (ISP).   Upon first install around November of 2015, I had issues getting the asset to work ap...
Hardware
Troubleshooting
Eric19's avatar
Eric19
Initiate
Jan 23, 2016

I'm having the same problems. a temporary fix is to log into your C3700, go to advanced home tab, then on the internet port area, click on connection status. another small window will popup. you can click "renew" to renew your lease. For me it immediately makes the internet work - until the next time which could be hours or minutes.

  • trigger113's avatar
    trigger113
    Tutor
    Jan 24, 2016

    I'll give that a swagger Eric and see if that helps.

    • PainInMyNet's avatar
      PainInMyNet
      Initiate
      Jan 24, 2016

      I'm having the EXACT same problem, also using Comcast and same Netgear model. I just started looking at my log yesterday because of other suspicious behaviour I've noticed on personal accounts like banking, gaming, etc.

       

      Releasing, power cycling, renewing, and changing to Google DNS servers did not change my IP address. Here is my most recent log

       

       

      [DoS attack: SYN Flood] from 152.163.13.6, port 801Sun Jan 24 13:13:02 2016192.168.0.23:51854152.163.13.6:80
      [DoS attack: SYN Flood] from 69.172.216.111, port 801Sun Jan 24 13:12:19 2016192.168.0.23:5168469.172.216.111:80
      [DoS attack: SYN Flood] from 74.119.118.94, port 801Sun Jan 24 13:12:13 2016192.168.0.23:5166974.119.118.94:80
      [DoS attack: SYN Flood] from 69.194.244.11, port 801Sun Jan 24 13:12:09 2016192.168.0.23:5164069.194.244.11:80
      [DoS attack: SYN Flood] from 173.241.250.221, port 801Sun Jan 24 13:11:52 2016192.168.0.23:51505173.241.250.221:80
      [DoS attack: SYN Flood] from 184.25.254.64, port 801Sun Jan 24 13:11:05 2016192.168.0.23:51381184.25.254.64:80
      [DoS attack: SYN Flood] from 69.194.244.11, port 4431Sun Jan 24 13:10:55 2016192.168.0.23:51351

      69.194.244.11:443

      [DoS attack: TCP- or UDP-based Port Scan] from 75.75.75.75, port 531Sun Jan 24 12:55:47 201673.71.107.103:5594975.75.75.75:53

       

      Ping has also been disabled since installation, which was about 8 months ago. I'm beginning to think there's a vulnerability in the router Netgear is unaware of or unable to address. Any other suggestions would be great.

       

      Thanks