Forum Discussion
Mar 31, 2015
Hi Sammo,
using a virtual IP as a SNAT is fine from my perspective.
I.e. I´m using it typically to SNAT outgoing mail.
As the receiver will probably do a reverse lookup it has to match one of the IPs the MX records for the sender domain resolve to. This way you lower the risk to get classified as a spammer.
Inbound mail is handled by virtual servers using the same IP.
As Brad already wrote, the virtual server is using a state table.
I can imagine conflicts with protocol like SIP using UDP as transport with fixed ports for source and destination.
Thanks, Stephan