My sister company has a TZ 215. I have a TZ 600 with a VPN set up. They need to VPN in into my network. I've sent them the global client software and the rcf file. However, they can't connect. The global client gives an error of "The peer is not responding to phase 1 ISAKMP requests. If they bypass the sonicwall and go straight through their modem then they have no problem. Are there some ports that need to be opened? Can anyone help??