Commit 6f1ace
2025-02-11 11:15:58 Samuli Seppänen: -/-| /dev/null .. FAQ/271-i-can-ping-through-the-tunnel-but-any-real-work-causes-it-to-lock-up-is-this-an-mtu-problem.md | |
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| + | # I can ping through the tunnel, but any real work causes it to lock up. Is this an MTU problem? |
| + | |
| + | Probably. It's best to change the `mssfix` parameter rather than directly changing the MTU of the TUN/TAP adapter. For example: |
| + | |
| + | ``` |
| + | mssfix 1200 |
| + | ``` |
| + | |
| + | You could also combine this with: |
| + | |
| + | ``` |
| + | fragment 1200 |
| + | ``` |
| + | |
| + | Note however that `fragment` will exact a performance penalty. |
| + | |
| + | Common values to try for `mssfix`/`fragment`: 1200, 1300, or 1400. |
| + | |
| + | Note that while `mssfix` only needs to be specified on one side of the connection, `fragment` should be specified on both. |