topic Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat in Firewall and Security Management

Facebook messenger has alert "no internet connection" when using CP 3800 Security Gateway

Deadvp — Mon, 09 Oct 2023 03:46:40 GMT

Hi everybody,
I am using a CP3800 device running Gaia OS R81.10 to replace a CP4600 device running Gaia R77.30. However, when using the CP3800 device, I encountered the error that Facebook messenger sometimes has no internet connection and cannot send or receive messages. When using the CP4600 device, Facebook messenger works normally.
I currently only use the Firewall feature on the CP3800 device and do not use any other features. In addition, I also tried updating the hotfix patch and tried updating to Gaia OS R81.20 but it did not solve the problem.
If anyone has encountered a similar situation or has any ideas, please help me!

Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat

_Val_ — Mon, 09 Oct 2023 07:06:24 GMT

is your HTTPS Inspection on?

Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat

Deadvp — Mon, 09 Oct 2023 07:15:38 GMT

Thanks for your reply,

I have not enabled HTTPS Inspection. I want to make sure it meets our firewall requirements before using any other feature. So I have not enabled other features including HTTPs Inspection

Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat

_Val_ — Mon, 09 Oct 2023 07:19:59 GMT

Is there anything in the logs?

Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat

_Val_ — Mon, 09 Oct 2023 07:24:38 GMT

Also, just to make sure. No Application Control and no URL Filtering, right?

Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat

Deadvp — Mon, 09 Oct 2023 07:43:53 GMT

Yes bro. I haven't used them yet. Only Firewall Policy based

Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat

Deadvp — Mon, 09 Oct 2023 07:47:49 GMT

I don't detect any log drops. I'm checking so that our LAN can connect to all destinations without going through any blocking rules.

Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat

Deadvp — Mon, 09 Oct 2023 08:05:18 GMT

I don't detect any log drops. I'm checking so that our LAN can connect to all destinations without going through any blocking rules.

I also don't use URL Filter or Application Control

Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat

_Val_ — Mon, 09 Oct 2023 11:23:21 GMT

OK, how about NAT rules? Do you have any for LAN? How do they look?

Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat

Deadvp — Mon, 09 Oct 2023 16:52:12 GMT

We do not create NAT rules on the CP3800 device. We perform NAT on the Router device. CP3800 only serves as the default gateway for LAN

Re: Facebook messenger has alert "no internet connection" when using CP 3800 Security Gat

CP_Chris — Tue, 10 Oct 2023 15:38:04 GMT

Do you detect the outgoing connection in the logs? Based on the information given, I would start an fw monitor looking for the relevant traffic and verify I am getting traffic on the internal and external interfaces in both directions. That may give you an indication of where to start looking for issues.