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[AC87U] Issue with OpenVPN Client - no internet

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ZeMitras

New Around Here
Hello!

This is my first post here, although I've been using Asus hardware from long time ago. I own an Asus RT-AC87U and since I discover asuswrt Merlin my life became brighter.

I've tried to draw a simplified version of my network setup (luckily I still maintain some paint skills form my collage time):
upload_2019-10-16_14-54-30.png

In summary, my telco router does not allow bridge mode, and so I setup the DMZ to my Asus RT-AC87U.
I've setup an OpenVPN Server running in AC87U which works flawassly.

The problem is with the OpenVPN Client (to my VPS which is running an OpenVPN server).
When I enable the OpenVPN Client, the session is established and I see the correct external IP (from my VPS) but every LAN device that I force (via policy) to use this VPN looses the contact with the internet (I cant reach any outside site).

What I have already tested, after I enable the VPN Client:
- I've check that the devices ping the router and other LAN devices with normal ping times (< 8 ms in wifi)
- I've checked that the OpenVPN clients can reach the pi-hole DNS server machine and resolve the DNS.
- Even so, and to simplify this debug, I've setup 1.1.1.1 DNS server (WAN tab) and made sure that the "LAN - DCHP Server" tab the DNS is set to the router (10.10.10.1) but no luck either

Router config screens:
home page:
upload_2019-10-16_15-29-44.png
wan page:
upload_2019-10-16_15-41-5.png

openvpn client config page:
upload_2019-10-16_16-2-22.png

system log - routing page:
upload_2019-10-16_16-3-19.png

I would appreciate any help you could provide.
Thanks in advance!
 
Test on vpn client page to set compression=None
Edit:
Also look for clues in syslog
And Welcome to the forum :)
 
Last edited:
Hello Zastoff! Thanks for your reply.
I dont understand what happened, I tried to set compression=None and nothing changed, but when I reverted compression=disabled it started to work... I dont understand why, but it is working! Thanks for the help

EDIT:
I think i've found the cause, the VPN Server was running simultaneously and apparently this causes the VPN CLient to not work properly.
 
Last edited:

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