Static route through secondary WAN and problems with RDP

[mephisto]

Hey guys,

I've got a pfsense running the default WAN from an external IP address working just fine, and a secondary WAN running from a internal IP address from another firewall (watchguard) that has a different internet connection. Because we have several site tunnels running on the watchguard firewall, I've set up static routes on pfsense for those networks for example 192.168.155.0/24 to go though the second WAN of pfsense that is routed through the watchguard firewall. It works fine, no ping loss but RDP connections tend to stall every 5-8 minutes, meanwhile the pings are running just fine and then after a while RDP resumes, or I need to manually reconnect.

If I set up a pfsense without firewall and using the watchguard as its default gateway, eveyrthing works fine, no drops on RDP connections.

Do you guys have any suggestion of what I can do please?

Thanks!