topic Re: Directing SMTP Traffic to VPN Tunnel in General Topics

Directing SMTP Traffic to VPN Tunnel

mkd1995 — Sun, 01 Aug 2021 10:07:41 GMT

Hello Team,

I am new to this kind of issue and need suggestions as I need to execute the same in my Organisation. I would like to know if we can direct the SMTP Traffic (Outlook Mails) to our IPsec VPN Tunnel without disturbing any other application traffic for users. If possible I need to establish this only for mails.

Re: Directing SMTP Traffic to VPN Tunnel

LAYER_8 — Thu, 05 Aug 2021 13:48:19 GMT

Yes, you are able to specify the application on a client device that will send traffic through the tunnel, see this post. You are then also able to write a policy on the NGFW allowing traffic from VPN zone to internal/internet zones using App-ID for SMTP as well.

Re: Directing SMTP Traffic to VPN Tunnel

batd2 — Thu, 05 Aug 2021 14:40:02 GMT

@mkd1995 Yes, this is possible. You can use Policy Based forwarding to create a match criteria (in your case application SMTP) and then route it over the VPN tunnel.