[root@hwdltsaloli ~]# cat /etc/sysconfig/iptables
# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:RH-Firewall-1-INPUT - [0:0]
-A INPUT -j RH-Firewall-1-INPUT
-A FORWARD -j RH-Firewall-1-INPUT
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT
-A RH-Firewall-1-INPUT -p 50 -j ACCEPT
-A RH-Firewall-1-INPUT -p 51 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT
[root@hwdltsaloli ~]# lsof -i:50
[root@hwdltsaloli ~]# lsof -i:51
[root@hwdltsaloli ~]#
/etc/services says:
re-mail-ck 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
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