firewall help

\_ SMTP quoth Eric on 9/2/2001 12:45 as having spake thusly:
\_
\_ Hi
\_
\_ I'm followng the instructions at this week's issue of LinuxJournal. They
\_ have an article on how to set up the Net Filter firewall. The address is
\_ http://www2.linuxjournal.com/cgi-bin/frames.pl/index.html
\_
\_ The instructions say to do "modprobe ip_tables" to insert and then "lsmod |
\_ grep ip_tables" to verify. However, I cannot get past the first command. I
\_ receive an error. Has anyone seen this error? Can you tell me what it
\_ means? I rebooted and get the same message. Here it is:
\_
\_ [root@Shitty /root]# modprobe ip_tables
\_ /lib/modules/2.4.2-2/kernel/net/ipv4/netfilter/ip_tables.o: init_module:
\_ Device
\_ or resource busy
\_ Hint: insmod errors can be caused by incorrect module parameters, including
\_ invalid IO or IRQ parameters
\_ /lib/modules/2.4.2-2/kernel/net/ipv4/netfilter/ip_tables.o: insmod
\_ /lib/modules/2.4.2-2/kernel/net/ipv4/netfilter/ip_tables.o failed
\_ /lib/modules/2.4.2-2/kernel/net/ipv4/netfilter/ip_tables.o: insmod ip_tables
\_ failed
\_ [root@Shitty /root]#

do an 'lsmod' with no grep. If you see 'ipchains' in there, you're
not going to be happy. 'rmmod ipchains' (if it's unused) and then try
the 'modprobe ip_tables' trick. If it's not unused,make it that way.

David