Hi Jeremy: You can set up a VPN between the head nodes across the firewalls, and set up appropriate routing (crosswise) to enable the machines to see each other. You will need to enable ip_forwarding to make this work. After this is done, it should be an elementary operation for SGE to qconf -ah remote_hosts ... (or the equivalent for Globus). If you are stuck on how to do this, email me offline. Joe -- Joseph Landman, Ph.D., Scalable Informatics LLC landman@scalableinformatics.com http://scalableinformatics.com Jeremy Mann wrote: >Good evening all. I need some advice on how to connect 2 clusters behind >firewalls. I've done research into SGE and Globus, but according to their >documentation, it will not work behind NAT firewalls. I do not want to >open my firewalls just for this purpose, rather I'd like to find a way to >work WITH both firewalls. > >Are there any other grid style solutions that WILL work in conjunction >with a NAT firewall? What do the big grid farms use? > >If there aren't, my boss and I have discussed using a custom SSH port >forwarding scheme where one port would forward to the 1st node, next port >to the next node and so forth. > >Any other ideas? Thanks... > > > > >