Hi - I'm looking to configure Stunnel in client mode to accept connections only from the PC it's running on. Would the config option "socket = a:SO_BINDTODEVICE=lo" accomplish that? And would this work on Windows? (is there a "lo" interface on Windows?) I'm going to do some testing, but thought I'd ask in case someone already knows I'll be pounding sand. And before anyone asks, turning on a firewall isn't an option - we don't have control of all the PCs involved. ---- David G. Bucci Chuck Norris can kick through all 6 degrees of separation, hitting anyone, anywhere, in the face, at any time. -- ChuckNorrisFacts.com