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2011 May 17
3
Why is iptables configured to accept packets on ports 50 and 51?
...50/tcp # Remote Mail Checking Protocol
re-mail-ck 50/udp # Remote Mail Checking Protocol
la-maint 51/tcp #
la-maint 51/udp # IMP Logical Address
Maintenance
Google turns up RMCP is a simple lightweight DP protocol for checking
if you have mail on a server
A quick Google search failed to turn up what is "IMP Logical Address
Maintenance"
Why is this in the default iptables configuration?
Thanks,
Aleksey