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feat(vpn): path MTU discovery to find the best MTU #2586

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feat(vpn): path MTU discovery to find the best MTU #2586

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@qdm12 qdm12 commented Nov 14, 2024

Fix #2570

  • pmtud for IPv4
  • pmtud for IPv6 (untested)
  • Run after VPN is up and modify live the VPN link MTU with netlink
    • No need to be blocking since this is rather fast and a low MTU of 1200 (see below) should work for the beginning.
  • Lower default MTU to 1200 for all VPN servers

@qdm12 qdm12 mentioned this pull request Nov 14, 2024
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qdm12 referenced this pull request in jfroy/flatops Nov 14, 2024
@jfroy
fix(gluetun): fully disable DOT
9b8b158 
It is not reliable? See qdm12/gluetun#2533 maybe.
@qdm12 qdm12 mentioned this pull request Nov 14, 2024
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Feature request: MTU testing to find the best MTU
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