Okay, this is just a reference for anyone trying to get an RV042 to do a VPN Gateway-to-Gateway with a Watchguard SOHO6. RV042 Firmware: 18.104.22.168 SOHO Firmware: 6.4.1 build 15 Linksys Network IP Subnet: 192.168.42.0 Netmask: 255.255.255.0 (/24) SOHO Network IP Subnet: 192.168.65.0 Netmask: 255.255.255.0 (/24) Setup on the SOHO Side: In the Soho, login and go to 'Managed VPN' Add a gateway. Give it a unique name, doesn't matter what. Set the Shared Key to something. Letters/numbers/symbols is good. Mode: Main Mode Remote IP Address: The external IP of your RV042 Local ID: The external IP of your SOHO Type: IP Address Remote ID: The external IP of your RV042 Type: IP Address Authentication: SHA1-HMAC Encryption: DES-CBC Negotiation expiration in KBs: 0 Negotiation expiration in hours: 8 Diffie-Helmen Group: 1 Uncheck 'Generate IKE Keep Alive' Phase 2 Settings Authentication: SHA1-HMAC Encryption: 3DES-CBC Uncheck 'Enable Perfect Forward Secrecy' Key expiration in KBs: 0 Key expiration in hours: 8 Next go below the Local/Remote network boxes and add your local and remote networks. In my case, it looks like: Local: 192.168.65.0/24 Remote: 192.168.42.0/24 Click 'Add' then 'Submit' Setup the RV042 1. Disable SNMP - Don't ask why. Just do it..it messes with packets going through the tunnel 2. Firewall - MTU - Manual: 1292 - Found this tidbit on the forums somewhere, apparently the Auto MTU bites and causes issues 3. VPN - Gateway to Gateway Here are the settings as I have it: Tunnel Name: Whatever you want goes here Interface: The interface with the external IP you set on the SOHO Enable: Check this. Local Secury Gateway Type: IP Only Local Security Group Type: Subnet IP: 192.168.42.0 Mask: 255.255.255.0 Remote Security Gateway Type: IP Only IP Address: (IP of your SOHO) Remote Security Group Type: Subnet IP: 192.168.65.0 Mask: 255.255.255.0 Keying Mode: IKE with preshared key Phase1 DH Group: Group 1 Phase1 Encryption: DES Phase1 Authentication: SHA1 Phase1 SA Life Time: 28800 Uncheck Perfect Forward Secrecy Phase2 Encryption: 3DES Phase2 Authentication: SHA1 Phase2 SA Life Time: 28800 Preshared Key: Same as on the SOHO Advanced: Check the following: Aggressive Mode Keep-Alive NetBIOS Broadcast - Doesn't seem to have an affect through the SOHO Save settings. This is just how I have my networks setup. The RV042 is relatively 'stock' as far as settings go, and I believe the SOHO, in terms of VPN, is as well. I can probably give minimal help with this if you need it. Above is just how I have my boxes set to have a G2G tunnel that works.