UDP VPN fragments and big files stall.
UDP fragmentation drops packets without retransmit. Routing needs work.
Try this first
- 1Switch to TCP mode temporarily to isolate.
- 2Enable path-MTU discovery on gateway.
- 3If stubborn: smaller MTU on tunnel.
When to bring us in
We debug fragmentation with packet capture.
See also
- VPN will not connect or keeps droppingTwo main causes: your home internet or the VPN server. One quick test separates them.
- VPN connects but corporate folders are unreachableConnection says "green" but your network drives will not open. Almost always a DNS or routing issue.
- Home PC slow on VPN, fast at the officeThree suspects: home internet, VPN server limits, or routing that takes a long detour.
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