Skip to main content

    Support

    Offers

richardberthao's profile
richardberthao
1st Reply
1st Like
Conversation Starter

New Poster

 • 

13 Messages

Wednesday, August 4th, 2021 1:17 PM

Closed

Firewall Blocked causing daily outages with Linksys router

I have issues since upgrading to Gigabit and getting new gateway Model:CGM4331COM .

I always get Firewall Blocked in logs and it blocks all internet access from my Linksys MR9600 router; which I use as primary connection for all devices. Very annoying and only started when I got new gateway a few months ago. Tech support has not been very helpful. I spent over an hour with one technician on the phone and he pushed a "fix" that bricked the router and I had to get a new one.

I am an IT professional of many years and know how to troubleshoot network issue. I even went so far as to build a network monitor device to track when connections drop (running NEMS on a Raspberry pi). The Internet drops on my Linksys router match the log entries in my Xfi Gateway:

FW.IPv6 FORWARD drop , 6896 Attempts, 2021/8/4 08:13:52 Firewall Blocked 
FW.IPv6 INPUT drop , 29453 Attempts, 2021/8/4 08:13:52 Firewall Blocked

I went in and turned off advanced security and disabled both IPv4 and IPv6 firewalls (I have a firewall on Linksys and run client based AV and anti-malware on my devices locally, so this is a non issue).

This is very frustrating because I am dropping Internet 1-2 times a day and the only fix is a hard reset of my Linksys router.

Question

 • 

Updated 

4 years ago

440

1

0

This conversation is no longer open for comments or replies and is no longer visible to community members.

EG

Expert

 • 

111.6K Messages

4 years ago

Do you have the Comcast gateway device in bridge mode ?

6

0

richardberthao

New Poster

 • 

13 Messages

@EG no I don't. I am on my third gateway device now. I tried bridge mode on both previous devices and once I switched over it killed all ports (I know port 1 is the only live port when in Bridge mode but it was dead also). So I am afraid to try bridge mode again because every time it "killed" all access to the router and I could not even locally connect to get back in to local admin console to turn off bridge mode. I would love it if I could get bridge mode to work because I think this will fix my issues. 

4 years ago

0

EG

Expert

 • 

111.6K Messages

O/k being that you are an IT pro, I know that you are aware of the double NAT condition that you have when two routing devices are being cascaded. Just sayin'.

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Please mark an Accepted Answer!tick

4 years ago

0

richardberthao

New Poster

 • 

13 Messages

I know, that is why I want to put in in bridge mode. I will try it again, hopeful this one will work

4 years ago

0

EG

Expert

 • 

111.6K Messages

Be sure to power cycle it after you place it in to bridge mode. Good luck !

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Please mark an Accepted Answer!tick

4 years ago

0

EG

Expert

 • 

111.6K Messages

FWIW, that's normal that you can't access the router component UI pages any longer. In bridge mode, it's just a straight cable modem / layer 2 bridge. The 192.168.100.1 address should still be able to access basic cable modem info such as the RF signal status like any other cable modem. I can't tell you why it's not working as a bridge, only that I've seen a large number of posts here lately indicating the same thing. Could be a firmware glitch.... If the 192.xxx address doesn't work, then you'll have to reset the device back to factory defaults in order to get the UI access back.

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Please mark an Accepted Answer!tick

4 years ago

0

forum icon

New to the Community?

Start Here