Hi. This is a stupid question. I know it is. I'm looking for the syntax to use with -j REJECT in which I can return a ICMP Type 3 Code 13, which is defined in _TCP/IP Illustrated Vol 1_ as "communications administratively prohibited by filtering." The man page is no help. The /sbin/iptables -p icmp --help lists only the codes used for matching packets, not generating them. I've tried every variation of 3/13 I could think of. I finally looked in the source and found "icmp-admin-prohibited" but when I tried it with 1.2.7 it didn't work. What's the secret code to get -j REJECT --reject-with icmp-admin-prohibited to work with 1.2.7? (signed) puzzled
