I recommend using the ppp daemon to handle the pppoe setup instead of the
DSL modem. Most DSL modems can be put into bridge mode so the auth can be
handled by an internal device(your debian firewall). This will allow you to
have more control and therefore assist in troubleshooting issues. This
will also eliminate the publicly unroutable IP and subnet on your wan
interface which will then be ppp0.
# apt-get install pppoeconf
# pppoeconf
In either case you should post the output of the following but only after
ensuring you can get out from the firewall machine.
# iptables -t nat -L -n -v
# iptables -t filter -L -n -v
# iptables -t mangle -L -n -v
# route -n
# ifconfig
# cat /proc/sys/net/ipv4/ip_forward
NOTE: feel free to replace ip info with <REMOVED> or something similar if
leaking of this info is a concern just make sure its a valid IP before
sending the info. Also if iptables is not your strongest skill you could
use ipmasq or another wrapper script ie: firehol etc. I REALLY recommend
writing your own though.
Cory Oldford
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