NAT with Source Adresse Alias not working
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Hi Guys,
I'm trying to secure my 3cx PBX additionally. I would like to allow the SIP ports to enter only from an Source Address alias (tel.t-online.de).
Here is a screenshot.
If I delete the source alias, it works. It also works with the public IP address. But not with an alias.
Does somebody has any idea?
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Check if pfSense can resolve the host name.
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It look's good!
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And have you ensured that the inbound connections are deriving from that source IP only when the NAT source is any by checking the firewall log?
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Hello!
Under Diagnostics -> Tables, what is in the TelekomSIP table?
John
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The problem is solved. The 3cx firewall check of course checks the ports from a different address than my aliases.