[uClinux-dev] uClinux and IP Firewall

From: Shaw Innes (shaw@immortal.net.au)
Date: Thu Jul 20 2000 - 18:53:24 EDT

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Hi All,
  I'm a recent convertee to the uClinux following, and have been tinkering
with a couple of NETtel devices as my platform (coldfire chipset).  I am
however experiencing some difficulties when trying to apply firewall rules
using the ipfwadm command as supplied in the uclinux source.

  If I attempt to insert a forwarding rule such as the following:
ipfwadm -F -a reject -P tcp -S 0/0 -D 0/0 23
(to disallow telnet through the firewall)

  The addition is 'apparently' successful.  However if I then do a list on
the rules.  I get a rule saying deny from any to any on all protocols, and
ports n/a.

  Has anyone successfully used ipfwadm and IP firewalling on a NETtel, or
other coldfire chip?  

Thanks.
  shaw Innes

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