Hi,
Port 4500 is the IPSec UDP nat port and 500 is IKE.
Anyconnect uses ISPEC so I think those ports are simply in use.
--John
On 24/09/19 9:36 PM, [email protected] wrote:
Hello,
in place upgrades from iOS 12 -> iOS 13 (release) seem to work well in
general. But there is a bizarre issue depending on *remote* endpoint
ports. If you have, in my case, 4500/UDP configured as remote endpoint
the tunnel does not send or receive traffic. Changing it to any other
port works. Changing back to 4500/UDP breaks it again reproducibly.
For others, documented here
<https://www.reddit.com/r/WireGuard/comments/d6in39/wg_broken_on_ios_13/> ,
it is 1500/UDP, in #WireGuard there has been a documented issue for
500/UDP not working.
I have AnyConnect installed in parallel and checked, whether that's
related. But removing and resetting Network settings did not fix port
4500 for me.
As there is no port number dependent branching in the WireGuard-iOS
code base, this is likely an iOS regression. Does any one of you have
a working channel to Apple to report this?
Thank you for an else excellent product. Let me know if I can be of
any help.
Best regards,
Christian
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