Tim Nelson wrote: > When VPN problems arise with specific applications, > always look at MTU as a possible culprit. Thanks for the suggestion. I should say that I am running OpenVPN on my system with no problem at all. Also the AT&T VPN apears to be running fine; it is just the sametime program running over VPN which is not working properly. Incidentally, what would you suggest as a possible MTU value? And what is the simplest way to change the MTU on a CentOS server? -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland