I have two PC's networked together using two D-Link DWL-120+ Enhanced 2.4GHz Wireless adaptors in ad-hoc mode.

The PC's are both running Windows XP Home SP2.

I'm ignoring the wireless control in XP (because it picks up 2 other unsecure wireless networks in the area) and using the latest D-Link software.

With Zonealarm (free edition) disabled they talk to each other perfectly for sharing files and internet.

With the firewall enabled they don't. I know you have to set the firewall with trusted IP's (easy for wired networks) etc but I can't work out the settings.

When I run IPCONFIG from the command console I get the following information:

Connection-specific DNS Suffix
: mshome.net
IP Address 192.168.0.11
Subnet Mask 255.255.255.0
Default Gateway 192.168.0.1

Whatever configuration I use in 'Zones' whether it be Host/Site, IP Address, IP Range or Subnet I just can't get it to work.

Can anyone tell me what I may be doing wrong or recommend a firewall that works?

Thanks a lot in advance.