Arguably this is a bug, but it's a bug in a dark corner of a niche use
case - *if* running OpenVPN on windows with privileges, *and* not using
DHCP but "ip-win32 netsh", *and* still using IPv4, then we install the
IPv4 address using no explicit "store=<nnn>" command - which defaults to
"permanent" (unlike "ip address add ..." on a unixoid system, which is
never persistent) - so the IPv4 address sticks across reboots.
First mistake... and then, on session end, we try to remove it with
"store=active" - which makes it go away *up to the next reboot*, and
then it's back, possibly interfering with future uses.
So this patch adds the "store=active" to the netsh.exe call inside
openvpn.exe for IPv4. This will fix it for all future assignments, but
not for "existing leftovers" - these will need to be fixed manually (once).
(One of the grand plans for 2.8 is "rip out all this from openvpn, only
support a single method, which is IPAPI via interactive service" - but
for 2.7 and 2.6, this is a bug that needs to be fixed short term)
The backport to 2.6 is trivial, though "cherrypick" does not work out of
the box due to the clang-reformat of the function call.
This said, I have not actually *tested* it, beyond "does it compile" - the
issue is clearly understood, the fix is clear, and it's just a string
change (as far as openvpn is concerned).
Your patch has been applied to the master and release/2.6 branch (bug).
commit 93c9b47cb0916c16ef76e6ecb5bf3f2ba7d267aa (master)
commit 3aacb621b56015f92cc0ae79987fa29c33842a2d (release/2.6)
Author: Lev Stipakov
Date: Wed Dec 10 08:59:00 2025 +0100
tun.c: set IPv4 address temporary on Windows
Signed-off-by: Lev Stipakov <[email protected]>
Acked-by: Gert Doering <[email protected]>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1430
Message-Id: <[email protected]>
URL:
https://www.mail-archive.com/[email protected]/msg34975.html
Signed-off-by: Gert Doering <[email protected]>
--
kind regards,
Gert Doering
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