Hi Marek,
Do you have any sources for that? AFAIK, ::/0 is a convenient way to
describe "any IPv6 address".
Still, if you are correct and should ::/0 include IPv4, then the exact
same setup under Linux operates differently, because here ::/0 only
routes IPv6, not IPv4. Note the empty result for the ipv4 routing table:
# AllowedIPs = ::/0
v@lnx:~$ ip ro li ta 51820
v@lnx:~$ ip -6 ro li ta 51820
default dev wgip6 metric 1024 pref medium
# AllowedIPs = ::/0, 0.0.0.0/0
v@lnx:~$ ip ro li ta 51820
default dev wgip6 scope link
v@lnx:~$ ip -6 ro li ta 51820
default dev wgip6 metric 1024 pref medium
So the question remains: ::/0 under Android routes all IPv4 traffic to
the WG interface, while under Linux, it will only route IPv6.
Is this known behaviour?
The wg-quick manpage is ambiguous, saying that "if one of those routes
is the default route (0.0.0.0/0 or ::/0), then it uses ip-rule(8) to
handle overriding of the default gateway." No information on routing
IPv4 or IPv6 differently.
A rephrase could be something like "if one of those routes is 0.0.0.0/0,
or ::/0, it uses ip-rule(8) to handle overriding the default route for
IPv4 or IPv6 respectivally."
Best regards,
Valentijn
On 24-10-2023 11:37, Marek Küthe wrote:
::/0 does not describe no IPv4 address, but all IP addresses. So when
[...]
On Tue, 5 Sep 2023 16:04:34 +0200
Valentijn Sessink <[email protected]> wrote:
AllowedIPs = ::/0
[...]
To my surprise, I found out that this also tries to route IPv4 addresses
to the other WG side.
Is this a known feature? Android 13, WireGuard for Android
v1.0.20230707, (from AOSP).--
http://www.openoffice.nl/ Open Office - Linux Office Solutions
Valentijn Sessink [email protected] +31(0)20-4214059
