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 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@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 > , > 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 > > _______________________________________________ > WireGuard mailing listWireGuard@lists.zx2c4.comhttps://lists.zx2c4.com/mailman/listinfo/wireguard > > _______________________________________________ > WireGuard mailing list > WireGuard@lists.zx2c4.com > https://lists.zx2c4.com/mailman/listinfo/wireguard >