Internet connection doesn't work for a few seconds then comes back

[Parkourpotato]

   Hello everyone, I'm not sure if this is a problem with my internet service provider or the actual modem, but I've been having this problem ever since I switched to this new modem. I had an old one that had no problems except for it having to be reset often, so we got a new and better one (This one). As soon as I started using it, the speeds were much better, but every few minutes the connection would slow to almost nothing for a few seconds, then go back to normal. I know it is not my device as this happens on my Xbox, phone, smart TV, laptop, and desktop computer as well. Something I've noticed though is that sometimes for an entire month, this problem will not happen, but then it will start up again after awhile. I've reset the modem countless times but it does not fix it. Is this a problem with the modem or my internet provider? 

[DarrenM]

Hello parkourpotato

You will have to log into your modem after you notice the issue happen and look at the logs and post them here this may help narrow down the issue.

DarrenM

[Athaxto]

Hello DarrenM - I apologize for cutting in on this discussion, but would you please tell me where/how to access the logs? Do I access them through NETGEAR Genie? I'm having my own power/surge/connection issues and using the site's search tool isn't helping (log-in topics vs actual log access). Thank you for any assistance you can provide. 

[DarrenM]

Hello athaxto 

You would log into the modem by going to 192.168.0.1 log in with admin/password then go to advanced-Administration-Event Log this will be where the logs will be.

DarrenM

[Athaxto]

Thank you!

[Parkourpotato]

Well like I said, it won't do it for an entire month but then start up again, so I'll get back to you with them in a month.

[Parkourpotato]

Ok update on the issue. Now instead of it occuring every few minutes it occurs every few seconds. Here are the logs:

Description	Count	Last Occurrence	Target	Source
[TCP- or UDP-based Port Scan]	4	Sun Jul 17 08:04:00 2016	68.12.174.141:56244	68.105.28.11:53
[FAILURE: User interface login]	1	Sun Jul 17 08:08:00 2016	192.168.0.1:80	192.168.0.4:50462
[TCP- or UDP-based Port Scan]	3	Sun Jul 17 10:07:41 2016	68.12.174.141:61892	68.105.28.11:53
[FAILURE: User interface login]	1	Sun Jul 17 10:11:23 2016	192.168.0.1:80	192.168.0.4:49839
[TCP- or UDP-based Port Scan]	91	Mon Jul 18 01:31:20 2016	68.12.174.141:59154	68.105.28.11:53
[Time Of Day established]	1	Mon Jul 18 07:54:47 2016	0.0.0.0:0	0.0.0.0:0
[Public Network Interface up]	1	Mon Jul 18 07:55:01 2016	0.0.0.0:0	0.0.0.0:0
[Firewall Up]	1	Mon Jul 18 07:55:01 2016	0.0.0.0:0	0.0.0.0:0
[Teardrop or derivative]	16	Mon Jul 18 07:55:14 2016	239.255.255.250:65535	192.168.0.10:65535
[TCP- or UDP-based Port Scan]	15	Mon Jul 18 13:00:16 2016	68.12.174.141:55528	68.105.29.11:53
[FAILURE: User interface login]	1	Mon Jul 18 13:02:31 2016	192.168.0.1:80	192.168.0.5:63794
[SUCCESS: User interface login]	1	Mon Jul 18 13:02:38 2016	192.168.0.1:80	192.168.0.5:63814
[TCP- or UDP-based Port Scan]	104	Tue Jul 19 13:58:08 2016	68.12.174.141:50986	68.105.28.11:53
[FAILURE: User interface login]	1	Tue Jul 19 14:01:24 2016	192.168.0.1:80	192.168.0.5:53258
[SUCCESS: User interface login]	1	Tue Jul 19 14:01:31 2016	192.168.0.1:80	192.168.0.5:53265
[TCP- or UDP-based Port Scan]	18	Tue Jul 19 17:55:14 2016	68.12.174.141:43943	68.105.28.11:53
[FAILURE: User interface login]	1	Tue Jul 19 17:56:46 2016	192.168.0.1:80	192.168.0.4:54581
[TCP- or UDP-based Port Scan]	68	Wed Jul 20 15:00:21 2016	68.12.174.141:59628	68.105.28.11:53
[FAILURE: User interface login]	1	Wed Jul 20 15:16:51 2016	192.168.0.1:80	192.168.0.4:49790
[TCP- or UDP-based Port Scan]	70	Thu Jul 21 12:37:35 2016	68.12.174.141:61056	68.105.28.11:53
[Time Of Day established]	1	Thu Jul 21 13:50:55 2016	0.0.0.0:0	0.0.0.0:0
[Public Network Interface up]	1	Thu Jul 21 13:51:10 2016	0.0.0.0:0	0.0.0.0:0
[Firewall Up]	1	Thu Jul 21 13:51:10 2016	0.0.0.0:0	0.0.0.0:0
[Teardrop or derivative]	2	Thu Jul 21 13:51:24 2016	239.255.255.250:65535	192.168.0.10:65535
[TCP- or UDP-based Port Scan]	1	Thu Jul 21 13:51:24 2016	68.12.174.141:54572	68.105.28.11:53
[Teardrop or derivative]	14	Thu Jul 21 13:51:27 2016	239.255.255.250:65535	192.168.0.10:65535
[FAILURE: User interface login]	1	Thu Jul 21 13:56:41 2016	192.168.0.1:80	192.168.0.4:49846
[TCP- or UDP-based Port Scan]	1	Thu Jul 21 13:59:05 2016	68.12.174.141:62975	68.105.28.11:53
[FAILURE: User interface login]	2	Thu Jul 21 14:01:23 2016	192.168.0.1:80	192.168.0.5:55224
[SUCCESS: User interface login]	1	Thu Jul 21 14:01:29 2016	192.168.0.1:80	192.168.0.5:55226

[DarrenM]

Hello Parkourpotato

You could try to factory reset the modem but you will have to set it up again with all your settings it could be some bad setting causing the issues.

DarrenM

[James_G]

You are getting port scans from another user on the Cox network (TCP- or UDP-based Port Scan and Teardrop or derivative). These could be causing your speed to drop. Here is a similar post on the Netgear community having the same connect problems and more:

https://community.netgear.com/t5/Cable-Modems-Routers/DoS-attack-Teardrop-or-derivative-Ping-of-Deat...

It also appears someone else is trying to log into your modem (FAILURE: User interface login) and failing. Unless you tried and failed, another one of your devices may be trying to access it. Could be another household user, an outside hacker or a virus on one of your devices.