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magicdots1234's profile



1 Message

Wednesday, March 13th, 2019 3:10 AM

Invalid IP Packet?


I have Gigabit internet connected through NVG599.  I have recently connected the Ring Alarm system to the router, directly via ethernet into LAN-2.  


Everything is fine, except for one very unusual problem.  Sometimes, at completely random intervals, the alarm system goes offline.  It reconnects within 1 minute.  Sometimes, it might go 2-3 days without this problem.  And sometimes, it occurs at precisely the EXACT same time everyday, around 11:30PM.


I looked at the Firewall Logs on the router, and noticed that the IP associated with LAN-2, is displaying "Invalid IP Packet":

2019-03-12T21:20:28-05:00 192.168.1.XXX 104.1X.XX.XX TCP Invalid IP Packet


The System Logs show the following:

2019-03-12T21:06:29-05:00 L3 sdb[803]: ELAN: Port lan-2 (eth1) is DOWN
2019-03-12T21:06:38-05:00 L3 sdb[803]: ELAN: Port lan-2 is UP. (eth1) speed 100 duplex full

Could someone explain to me what exactly I need to do to fix this?


Unfortunately, it seems that this is localized to AT&T's internet, since other people who use Ring Alarm with other ISPs, don't seem to have this problem.


I would honestly appreciate any help.  This has become really irritating.


Thank You!

Community Support


221.4K Messages

5 years ago

Hi There @magicdots1234

We understand that your Alarm System, keeps going offline at 11:30 pm and your Firewall log shows that are getting an Invalid Packet.


Let's start with some probing questions, to get a better picture of what is going on.


When did that first start happening?

When this happens is there any other device that goes offline?

Are there any changes to the lights on the router?(Any red lights?)

How is the Alarm System connected to the internet?(Wired or WIFI)?

Have you tried to reboot the router? If not, please try these steps:

Reboot your gateway

Restarting your Wi-Fi® gateway can be a quick fix for many Internet issues. Here’s how:

  1. Unplug your gateway for 15 seconds.
  2. Remove and reinsert the battery, if you have an internal battery backup.
  3. Plug the gateway back in and wait for the lights to stop flashing. 
  4. Check your connection to see if the problem is fixed.

 Please let us know if this helps.


Thank you very much.


Matthew, AT&T Community Specialist

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