[Cratebv212]

Firmware: DD-WRT v3.0-r47618 std (11/05/21)
Dell Inc. 0GDG8Y
Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz

Just upgraded to this build this morning. Everything is working great so far except the openvpn client. The status page says it's connected but when I run speedtest.org or check my ip on the web it still shows my internet provider ip. The vpn ip shows up for about 5 seconds then reverts. I'll include a shot of my settings.

[Cratebv212]

Nevermind, I found new settings according to express vpn. I just noticed the mtu size reset when I upgraded and also the compression setting.

[Cratebv212]

Well, it only lasted about 1 minute again.

[egc]

Have a look in the documentation, it could be outdated though but see the Client setup guide: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=327398

But I do see some conspicuous settings:
Your encryption cipher is AES-256-CBC but your first data cipher is AES-256-GCM?

You are using a TLS key but have chosen TLS-crypt, but usually providers still use the older TLS-auth

You seem to have settings in the Additional config usually those are redundant or wrong, normally you do not need anything in additional config

Not related to your problem but I would choose UDP4 instead of UDP

I do not use ExpressVPN so it is a bit of guessing on my side

I have transferred this to the Advanced Networking forum where these questions get better attention.
See the forum guidelines with helpful pointers about how to research your router, where and what to download, where and how to post and many other helpful hints:
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087

[Cratebv212]

I just changed those settings to no avail. I'll check the post in the networking side of the forum. Thank you for your help.

[Cratebv212]

Screenshot of updated settings

[eibgrad]

FWIW, on my own *working* ExpressVPN configuration, I have "Compression" set to No, "Tunnel MTU setting" to 1400, and "Tunnel UDP Fragment" set to 1300.

On a side note, is that PBR correct? It's NOT specifying a private network (e.g., 192.168.0.0/24, 10.0.0.0/8, 172.16.0.0.0/12), but something in the *public* IP space, 110.x.x.x.

[egc]

Good catch!

If the PBR entries and the compression does not solve your problem post a picture of the OVPN status page (whole page) after you added:
verb 5
in the Additional OpenVPN Config and rebooted the router

[Cratebv212]

I changed the settings you suggested and still nothing. That pbr has worked for me for years to just send clients above 100 through the vpn. Here's a shot of the status page before and after the verb5.

[Cratebv212]

The screenshots are backwards. The before is connected and after has nothing.

[egc]

What is the local subnet of the router i.e. what is in Local IP Address on setup page?

Try the following:
Clear the PBR field, reboot the router and see if you have a VPN connection

Edit: did you set compression to No and changed MTU according to @eibgrad's advice

[eibgrad]

There's nothing wrong w/ using 110.x.x.x provided that is your local network. I just found it a bit odd given 99.9% of NAT routers (at least for consumers) use a *private* IP address space, NOT a public one. But if the latter is your preference, so be it. When users complain about problems, we're always looking for things out of the ordinary.

[egc]

What if the provider is using that network?
I admit chances are slim

Would it not always be advisable to use a private address space?

https://en.m.wikipedia.org/wiki/Private_network

[eibgrad]

[Cratebv212]

When I get home I'll mess with it some more. I just don't understand why it worked flawlessly with a September build. I may try to erase and reset and of course set it up again. I usually upgrade without reset and never had a problem until this build.