wrt54gl with ovpn l2tp connection over mobile hotspot

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Polar-wind
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Joined: 08 Dec 2025
Posts: 4

PostPosted: Mon Dec 08, 2025 20:18    Post subject: wrt54gl with ovpn l2tp connection over mobile hotspot Reply with quote
Hi all,

This is my first post here. My setup:

One PC connected with cat5 cable to
Linksys WRT54GL 1.1 flashed with DD-WRT v3.0 broadcom r52894 mini (06/06/2023).
A mobil phone is used as hotspot.

This setup works just fine. I now want to add VPN to the mix. At home I run a Softether VPN server. On my PC I run the Softether client software. My Android devices, iPhone and iPad connect with L2TP. All this works fine.

I want to configure my WRT54GL so it connects ALL devices to the VPN, without the need for individual configuration on each and every device.

I have been browsing the forum and the download section but I am uncertain what version to download for this older hardware. It has to support L2TP. My current version r52894 has support for OVPN client configuration, but no L2TP.

Also, somewhere on this forum I found a comment telling that when configuring VPN on a router, you need 2 routers. One for the VPN config, and the other for the connection to the internet. Is that correct? If so, how do I do this?
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kernel-panic69
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Joined: 08 May 2018
Posts: 16703
Location: Texas, USA

PostPosted: Mon Dec 08, 2025 21:02    Post subject: Reply with quote
K24 / K26 4MB images do not have OVPN. You have EoIP and PPTP for tunnels, no other options. The VPN images will not flash to this router (except for K26 ovpn small, but migrating to K26 is a one-way ticket that requires JTAG recovery). You need a better router with more flash space.
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Polar-wind
DD-WRT Novice


Joined: 08 Dec 2025
Posts: 4

PostPosted: Mon Dec 08, 2025 21:14    Post subject: Reply with quote
Thank you for your reply. Since I have the VPN option in my DD-WRT v3.0 broadcom r52894 mini (06/06/2023), it should be doable, but without support for L2TP, right? This means I need to include the keys into the text field that is used for that purpose, if I'm not mistaking.

Long story short: I could stick to r52894 and configure VPN access without L2TP. Is that a correct assumption?
Per Yngve Berg
DD-WRT Guru


Joined: 13 Aug 2013
Posts: 7112
Location: Romerike, Norway

PostPosted: Tue Dec 09, 2025 8:15    Post subject: Reply with quote
Not worth it, considering this router will be painfully slow.

Remember it's from a time where 4Mbit/s was a fast Internet speed.
Polar-wind
DD-WRT Novice


Joined: 08 Dec 2025
Posts: 4

PostPosted: Tue Dec 09, 2025 9:42    Post subject: Reply with quote
Thank you for your reply.

This leaves one question yet to be addressed, regardless of if I'm using my WRT54GL or another (faster) router:

"Also, somewhere on this forum I found a comment telling that when configuring VPN on a router, you need 2 routers. One for the VPN config, and the other for the connection to the internet. Is that correct? If so, how do I do this?"

As I specified in my setup I am using only one router that bridges my PC to my mobile hotspot. Remember the goal is to avoid having to install certificates on each and every device. Can that be done?
bushant
DD-WRT Guru


Joined: 18 Nov 2015
Posts: 2194

PostPosted: Tue Dec 09, 2025 14:06    Post subject: Reply with quote
This is probably a good time to read the OVPN Guide
and the Wireguard Guide
which is much faster, both Stickies in this forum.

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egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 13880
Location: Netherlands

PostPosted: Tue Dec 09, 2025 14:40    Post subject: Reply with quote
Polar-wind wrote:
Thank you for your reply.

This leaves one question yet to be addressed, regardless of if I'm using my WRT54GL or another (faster) router:

"Also, somewhere on this forum I found a comment telling that when configuring VPN on a router, you need 2 routers. One for the VPN config, and the other for the connection to the internet. Is that correct? If so, how do I do this?"

As I specified in my setup I am using only one router that bridges my PC to my mobile hotspot. Remember the goal is to avoid having to install certificates on each and every device. Can that be done?


I have a WRT54GS with 8 MB flash and yes in the past it had a working OpenVPN but that is already broken for a very long time, beside even if it works you will not get more than 2-3 Mb/s so in effect not very useful.

Now on to your question
A VPN is a connection between a server and a client.

You can use your router as a client to a server of e.g. a VPN provider, for testing you can use Proton which has a free account.

You can also use your router as a a VPN server and use e.g. your phone or laptop as a client to connect from outside via the internet to your home.

WireGuard is the easier and more performant option compared to OpenVPN.

Links to the setup guides are already provided

_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
Polar-wind
DD-WRT Novice


Joined: 08 Dec 2025
Posts: 4

PostPosted: Tue Dec 09, 2025 21:58    Post subject: Reply with quote
Thank you for all the good advice. I decided it is time to put my good old WRT54GL to rest and have I found a ready plug and play device without the need for flashing.

Beryl AX (GL-MT3000) VPN Router

I think I will give this one a go.
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 13880
Location: Netherlands

PostPosted: Wed Dec 10, 2025 6:49    Post subject: Reply with quote
Polar-wind wrote:
Thank you for all the good advice. I decided it is time to put my good old WRT54GL to rest and have I found a ready plug and play device without the need for flashing.

Beryl AX (GL-MT3000) VPN Router

I think I will give this one a go.


It is a nice little travel router not that powerful, if you really need it for travelling than I can understand your choice. If it is for stationary use e.g. in your home buy a GL-MT6000 if you want something of GL.iNET. I had one on sale for slightly over E 100.

Note both are not compatible with DDWRT and are running proprietary GL.iNet software (which is a heavily modified old version of OpenWRT but can run the genuine OpenWRT)

_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
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