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Greg Turnbull [mailto:[EMAIL PROTECTED]] wrote:
> I am trying to get ipmasquerading working on the 2.4 kernel
> using redhat 7.1 but I am having no success.
(snip)
> /lib/modules/2.4.2-2/kernel/net/ipv4/netfilter/ip_tables.o:
> init_module:
> Device or resource busy
RH 7.1 by default activates an ipchains firewall unless you specify no
firewall during installation. Since ipchains and iptables essentially
provide a similiar service, at the same level, and with the same kernel
hooks, they can not both be active at the same time. The solution is to
stop the ipchains firewall from loading or unload it before attempting to
load ip_tables. As root you can use "chkconfig" to manage your run level
scripts and link/unlink them to the various run levels. For this particular
problem "chkconfig --del ipchains" will remove the links for ipchains to the
various run levels that it exists in. Now at this point you have two
options: reboot or unload the ipchains firewall manually. I prefer to
reboot as little as possible. So, use "service ipchains stop" and this will
flush the ipchains firewall rules and then "modprobe -r ipchains". This
should unload the ipchains module and you should now be able to load the
ip_tables module.
Jamin W. Collins
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