XP Firewall changes - how to find. printer sharing over IPSEC tunnel
Posted on 2011-04-20
a very strange thing has happened to a system I look after. It has been working happily for several years. A POS/Accounting program runs on a central Windows Server 2003 (NOT SBS) and several remote shops connect in and use it via RDP. There is a snapgear SG-300 at each end with an IPSEC tunnel set up.
Originally, the server (via IP addresses) could ping and access devices on the shops LAN, including connecting to a docket printer local to the shops PC (via windows share). The server can also print to an networked Laser printer in the shop.
The server has an IP address of 192.168.0.253; the shop PC in question is 192.168.7.100.
So, a couple of weeks ago, no docket printer. It is there locally but the server cannot see it. The server can still happily print to the networked laser printer and the shop PC can happily bring up an RDP session.
After much hair pulling I disabled the windows firewall on the Shop PC and everything worked again.
So somehow (I suspect windows updates) the windows firewall settings have been changed. But exactly what I can't find.
I have tried resetting the firewall back to defaults and making sure windows file and printer sharing is allowed - no joy.
Any suggestions? Any ideas where to look?
I know it works but I'd rather not leave the PC with it's firewall disabled.