For me, I was using the VPN to connect XP roadwarriors to a Windows 2000 server. This was a bit of a challenge, as I couldn’t get the roadwarrior to join the domain. In searching the internet, here is what I found:
In order to ping the home network, you have to add the following line in/etc/rc.d/rc.firewall.local file Near the beginning of the file after the following lines…
# See how we were called.
case “$1” in
## add your ‘start’ rules here
#Added for zerina start – BEGIN
#Added for zerina start – END
Insert the following on the next line:
iptables -t nat -A CUSTOMPOSTROUTING -s 10.26.1.0/24 -o eth0 -j MASQUERADE
# where 10.26.1.0/24 is the IP range of IP addresses used for the roadwarriors
# to VPN into. Also eth0 is the GREEN network card..
# Windows Netbios stuff blocked before log Source Ports 137,138,139
ipchains -A input -p udp –source-port 137:139 -j REJECT
ipchains -A input -p udp –destination-port 137:139 -j REJECT
On the Windows XP computer:
You will need your Roadwarrior PC to use the same workgroup name as the domain of the server you are going to VPN into. To do this, RIGHT click on MY COMPUTER then click on PROPERTIES. Click on the Computer Name tab. Click the CHANGE button, and select WORKGROUP, and then type in the DOMAIN NAME that your server you want to VPN into is in. Click OK. Reboot the PC when it tells you.
Another nice add-on, espceially if you are setting up your IPcop firewall for say, a Coffee shop that wants to offer free WiFi, is to put in another NIC, and set it up as a Blue Interface.