Port dependent issues on iOS 13

[Reid Rankin]

FWIW, all those ports (4500, 1500, 500) seem to work for me with iOS 13 and
WireGuard for iOS build 0.0.20190610 (13).

On Wed, Sep 25, 2019 at 6:03 PM John huttley <john at mib-infotech.co.nz>
wrote:

> 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, wireguard at p-np.de 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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