Connection Hangs

IPsec does not gracefully handle fragmented packets. Many of these issues have been resolved over the years, but there may be some lingering problems. If hangs or packet loss are seen only when using specific protocols (SMB, RDP, etc.), MSS clamping for the VPN may be necessary. MSS clamping can be activated under VPN > IPsec on the Advanced Settings tab. On that screen, check Enable MSS clamping on VPN traffic and then enter a value. A good starting point would be 1400, and if that works slowly increase the MSS value until the breaking point is hit, then back off a little from there.