yonatan pingle wrote: Thanks for your response. > I am not sure it's related to centos that much, when it comes to port > forwarding, if you might use iptables correctly with several NIC(s), I should have said that I am using shorewall, which seems to work perfectly for my purposes. > if you can create a vlan with your linksys, like they talk about here: > http://www.dd-wrt.com/phpBB2/viewtopic.php?p=4692 I'm not really clear if there is any difference between vlan and vpn. In any case I am running OpenVPN on the server linking computers in 2 countries, and this seems to work perfectly. One obvious possibility is that the IBM Lotus "sametime" program that is not working properly requires some port to be open; but I haven't been able to work out which port, if that is indeed the cause of the problem. -- 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