Mail alert - what source IP?

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jensp
Posts: 15
Joined: 28 Jan 2009, 22:33

Mail alert - what source IP?

Post by jensp » 19 Aug 2022, 15:21

Mail alerts are not working and I can't find any traces of this in the log. Do I need to allow it in a policy? What source IP will be used? Is there a problem if the SMTP is located on a network connected through VPN?

Peter
Posts: 702
Joined: 10 Apr 2008, 14:14
Location: Clavister HQ - Örnsköldsvik

Re: Mail alert - what source IP?

Post by Peter » 20 Oct 2022, 10:41

Hello.

"Do I need to allow it in a policy?"

No, as this packet/traffic is initiated by the firewall itself.

"What source IP will be used?"

It will use the source IP of the interface where the SMTP server is located based on the firewalls <main> routing table.

"Is there a problem if the SMTP is located on a network connected through VPN?"

It could be, it depends on how the VPN is configured. If you for instance use an IPsec tunnel and the local network is set to be all-nets (0.0.0.0/0) the SMTP mail sender IP would be 127.0.0.1 if you have not defined a manual IP address on the IPsec tunnels advanced setting.

Note: If you need further help with this i recommend creating a support ticket about it as we do not watch the forums actively and this system will be retired in the future once we have moved the majority of the FAQ and how-to articles to the new KB space (kb.clavister.com).

/Peter

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