Dear pals,
I am in research of the subject as part of my study lab - stuff is "Using IP Tables on Linux and setting the filtering rules" . I fortunately found a good stuff of RED Hat Linux Enterprise .

But in that I don't get the term CIPE in sentence
You can configure IPTables to accept connections from remote SSH and CIPE clients. For example, to allow remote SSH access, the following rules may be used:iptables -A INPUT -p tcp --dport 22 -j ACCEPT iptables -A OUTPUT -p udp --sport 22 -j ACCEPTCIPE connection requests from the outside can be accepted with the following command (replacing x with your device number):
iptables -A INPUT -p udp -i cipcbx -j ACCEPT iptables -A OUTPUT -p udp -o cipcbx -j ACCEPT
What is mean by CIPE ?
Is device number is MAC number or IP Number ?

Please advise