Setup dynamic dns server

shorewall is a linux firewall from the http://www.shorewall.net/.
This is two interface configuration, the configuration files are in the /etc/shorewall.
To enbale the starting at system boot change the startup values in the shorewall.conf and /etc/default/shorewall from 0 to 1:

Startup = 1

As well set these values in the shorewall.conf as:

IP_FORWARDING=on ROUTE_FILTER=no DISABLE_IPV6=yes

Configure these files /etc/shorewall as:
interfaces:

#ZONE   INTERFACE   BROADCAST   OPTIONS #net   eth0    detect    dhcp,tcpflags,nosmurfs,routefilter,logmartians net   ppp0     -    dhcp,tcpflags,nosmurfs,routefilter,logmartians loc   eth0    detect    tcpflags,nosmurfs,routefilter,logmartians

policy:

#SOURCE DEST POLICY LOG LEVEL LIMIT:BURST $FW    net    ACCEPT loc    net    ACCEPT net   all    DROPE    info loc    $FW    ACCEPT $FW    loc    ACCEPT # THE FOLLOWING POLICY MUST BE LAST all    all    REJECT    info

zones:

#ZONE TYPE OPTIONS IN OUT # OPTIONS OPTIONS fw    firewall net    ipv4 loc    ipv4

masq:

#INTERFACE SOURCE ADDRESS PROTO PORT(S) IPSEC MARK eth0    192.168.1.0/29,\         10.0.0.0/8,\        169.254.0.0/16,\        172.16.0.0/12,\        192.168.0.0/16

Downalod the two other config files rules and shorewall.conf.

To see the shorewall log run the command:

/sbin/shorewall show log

for debug run:

shorewall debug start 2> /tmp/trace

and read the /tmp/trace file for errors.

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