The following lines in
/etc/rc.d/rc.firewall.inet_sharing-2.4 don't seem to
be of use to me and I would like to remove them.

# Allow dhcp requests
iptables -A INPUT -i eth0 -p udp --sport bootpc
--dport bootps -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --sport bootpc
--dport bootps -j ACCEPT
iptables -A INPUT -i eth0 -p udp --sport bootps
--dport bootpc -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --sport bootps
--dport bootpc -j ACCEPT
 
# Allow dns requests
iptables -A INPUT -i eth0 -p udp --dport domain -j
ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport domain -j
ACCEPT

I believe the reason the dhcp requests are allowed is
because I thought I would use the mandrake connection
sharing wizard at first but decided not to now as it
complicates using samba with my windows machine.

Correct me if I'm wrong but the dns requests line
looks like it's accepting dns requests from eth0 on
tcp and udp.  I can't for the life of me figure out
why I would want to do this.  I only have two
machines.  One is running Mandrake 8.0 (not a dns
server) and a windows machine that is sharing the
connection of the mandrake box (ppp0).  As long as the
dns server entries are inside of the windows
networking setup then I shouldnt be accepting dns
queries for any reason then should I?

I'm also writing my own firewall by hand with iptables
to learn the in's and out's of how it works.  When I
finally have it finished can I just place it in
/etc/rc.d/rc.firwall to have it executed on boot?

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