firewall help

[David A. Sinck]

\_ 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