L2TP VPN not working on IoS with DDNS?

Ensto

Hi.

I just got DDNS for my business dynamic IP. Everything work flawless as before exept one thing.

None of my Apple devices can connect to L2TP anymore... How can this be when the windows computer connects (with built in VPN client in Win 11) without issue on the same L2TP setup? Is it not possible for ios devices to connect to L2TP with DDNS? I even ran the Wizard and created a fresh L2TP config but with the new DDNS name. Everything else like passwords, key types is exactly the same as before i had DDNS.

I have a USG FLEX 100, firmware V5.31(ABWC.0)

I have no clue what casuses the problem.


IKE log:

Ensto

Ensto said:

Hi.

I just got DDNS for my business dynamic IP. Everything work flawless as before exept one thing.

None of my Apple devices can connect to L2TP anymore... How can this be when the windows computer connects (with built in VPN client in Win 11) without issue on the same L2TP setup? Is it not possible for ios devices to connect to L2TP with DDNS? I even ran the Wizard and created a fresh L2TP config but with the new DDNS name. Everything else like passwords, key types is exactly the same as before i had DDNS.

I have a USG FLEX 100, firmware V5.31(ABWC.0)

I have no clue what casuses the problem.


IKE log:

PeterUK said:

On my android phone they are trying/have removed L2TP IKEv1 support so you may have to setup IKEv2

mMontana said:

Do iOS/Apple devices resolve correctly the ddns hostname with the updated ip address?

Were Apple devices update before the issue?

I finally found out what the problem was. It was due to the Wizard wich had setup the VPN Gateway Local ID Type as ''DNS'' with my DDNS domainname istead of IP4v and 0.0.0.0 under VPN Gateway>Authentication>Advanced. It seems like the Win 11 native VPN client can figure this out but not the ios native VPN client 

After i changed from DNS to IP4v (0.0.0.0) the ios devices started connection again. I was fooled by the Wizard once more 

PeterUK

On my android phone they are trying/have removed L2TP IKEv1 support so you may have to setup IKEv2

mMontana

Do iOS/Apple devices resolve correctly the ddns hostname with the updated ip address?

Were Apple devices update before the issue?

Ensto

Ensto said:

Hi.

I just got DDNS for my business dynamic IP. Everything work flawless as before exept one thing.

None of my Apple devices can connect to L2TP anymore... How can this be when the windows computer connects (with built in VPN client in Win 11) without issue on the same L2TP setup? Is it not possible for ios devices to connect to L2TP with DDNS? I even ran the Wizard and created a fresh L2TP config but with the new DDNS name. Everything else like passwords, key types is exactly the same as before i had DDNS.

I have a USG FLEX 100, firmware V5.31(ABWC.0)

I have no clue what casuses the problem.


IKE log:

PeterUK said:

On my android phone they are trying/have removed L2TP IKEv1 support so you may have to setup IKEv2

mMontana said:

Do iOS/Apple devices resolve correctly the ddns hostname with the updated ip address?

Were Apple devices update before the issue?

I finally found out what the problem was. It was due to the Wizard wich had setup the VPN Gateway Local ID Type as ''DNS'' with my DDNS domainname istead of IP4v and 0.0.0.0 under VPN Gateway>Authentication>Advanced. It seems like the Win 11 native VPN client can figure this out but not the ios native VPN client 

After i changed from DNS to IP4v (0.0.0.0) the ios devices started connection again. I was fooled by the Wizard once more