WatchGuard S2S VPN very slow

Hi guys,

I have created a site to site VPN between my WatchGuard XTM firewall and MS Azure static gateway. The VPN connects without any issues, but I noticed the file transfer speeds to my servers (via SMB) are very slow. Most of the time it peaks at 350KB/s, sometimes it hovers around 70KB/s. I have 200Mbps fibre link that is not saturated at all.

sometimes it reaches 3-5MB/s, but it is rare and random.

I'm located in Sydney Australia, the Virtual network is in the UK. I tried to test the Netherlands and Sydney data centres, same exact problem, very poor performance.

Anyone having similar issues with S2S VPNs?

Thanks,

Ib