How to configure dovecot imap to listen on multiple ports?

[Jochen Bern]

On -10.01.-28163 20:59, Rick Thomas wrote:
> But a laptop that’s sometimes inside, sometimes outside doesn’t have
> a fixed port to connect to.  For those cases, I’d like the dovecot
> server to recognize the outside ports on the inside.

Well, if offering the *exact same* functionality on a second port is all
that needs to be done, having the server's host firewall (iptables?)
duplicate the NAT on your border firewall for internal accesses should
do just fine; no need to majick it into the dovecot config (which opens
the possibility of functional differences being introduced unintentionally).

Assuming Red Hat or similar with no conflicting iptables rules (yet),

# iptables -t nat -A PREROUTING -p tcp --dport 30xxx -j DNAT --to :143
# iptables -t nat -A PREROUTING -p tcp --dport 30yyy -j DNAT --to :993
# service iptables save

Regards,
								J. Bern
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