[Freeswitch-users] Firewall mysteriously starts blocking calls to port 5060

[Giovanni Maruzzelli]

Any fail2ban ?
Have you checked if the whitelist was canceled or still there in "iptables
-n -v -L"?


On Fri, May 3, 2019, 18:20 Chad Phillips <chad at apartmentlines.com> wrote:

> Recently I reconfigured my firewall (via Shorewall) to block all inbound
> traffic to port 5060, except for whitelisted IP addresses from my inbound
> DID providers. After setup, we ran tests and everything worked fine for all
> incoming calls across all providers.
>
> Then a few hours later, calls from one of our providers started being
> blocked. All calls from our other providers continued coming through fine.
> Upon restarting our firewall service, the blocked calls from the single
> provider started coming through again.
>
> Between our successful tests and the start of the issue, there were zero
> changes made to the server.
>
> So why would my firewall suddenly start blocking inbound traffic from a
> whitelisted IP that it was previously letting through??
>
>
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