From 2d677112997d2dcdccd87e06763d93862ff58641 Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Fri, 8 Mar 2019 02:06:07 +0100 Subject: ifaceconfig: don't try to set v6 MTUs under 1280 We also constrain v4, but it'd be surprising for that to actually be an issue without something else also being an issue. Reported-by: Thomas Gschwantner Signed-off-by: Jason A. Donenfeld --- service/ifaceconfig.go | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'service') diff --git a/service/ifaceconfig.go b/service/ifaceconfig.go index 1bd5f690..edf13ab1 100644 --- a/service/ifaceconfig.go +++ b/service/ifaceconfig.go @@ -105,6 +105,9 @@ func monitorDefaultRoutes(device *device.Device, autoMTU bool, guid *windows.GUI return err } iface.NlMtu = mtu - 80 + if iface.NlMtu < 576 { + iface.NlMtu = 576 + } err = iface.Set() if err != nil { return err @@ -114,6 +117,9 @@ func monitorDefaultRoutes(device *device.Device, autoMTU bool, guid *windows.GUI return err } iface.NlMtu = mtu - 80 + if iface.NlMtu < 1280 { + iface.NlMtu = 1280 + } err = iface.Set() if err != nil { return err -- cgit v1.2.3-59-g8ed1b