One to one Nat



I'm using shorewall and I've been assigned to a new public IP block.
The current setup is one to one static nat for two of these old public
IPs to some internal servers. Can I simply add two new entries for
the new IPs translating to the same internal IPs? The reason I want
to do this is because one of these is a mail server and I want to
avoid any disruption during the MX and A record change. It seems
logical that I could nat two different addresses on an interface to me
but I'm still pretty green in this area and I'm afraid I might be
missing something. Can someone please confirm that this sounds ok?

TIA,
Dave B.

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