Asus RT-AC68u and GL.INet "slate" open VPN issue

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New Around Here
HI All..

Been a long time reader now finally a poster and have been sent here from the GL.Inet forums..

Summary of my issue is below (copied from other forum) The below is just my replies as the responses I had were basically asking questions.. Thanks in advance!

Looking for some guidance. I’m new to these mini routers and they look like a great bit of kit. I’m trying to establish a connection from a boat to home via openvpn.

I have the gl.inet gl-ar750s-ext on the boat connected via the wan port to a netgear LB2120 modem (LTE) The connection is using gc-nat so I have no way of accessing the boats systems directly… so this is why I have gone with a router capable of openvpn client…

At home I have the AC68u sitting behind a vdsl modem - static IP address and the AC68u is running 2 instances of OpenVPN server one TUN and one TAP…

I have exported the config files and imported them in to the gl.inet gl-ar750s-ext… the TAP basically stops access to the router, the wifi loses its internet connection and nothing works.

The TUN profile sometimes works, can browse the network at the server end (home), has no internet for the local wifi connection and I cannot get to the gl.inet gl-ar750s-ext’s network from the server (home) end…

Has anyone got any hints or tips or can point me in the right direction?.. i’m pulling my hair out with it!


I agree it should work and the tun profile works fine on my phone, just not on the router (slate)… hence me trying tap which seems even harder…

My end goal is to have the slate auto connect to the home network, but only for lan access, and access the raspberry pi I have on the boat so I can ssh into it if needed… there is also a possibility of an IP cam too we have a 250gb plan so data should not be an issue… .

The main issue I seem to have is accessing home to slate when connected and anything that is connected to the slate via wifi loses internet… which isn’t helpful. I didn’t want to use the VPN for internet access for the local devices on the boat via the slate

Hope that makes sense,??

I’ve done a heap of searching and really not come up with much but will ask on smb forums… oh and yes running latest Merlin.


Yes this setting is Lan only… as I mentioned the profile works fine on my phone (i cant prove the return back to the client) but i definitely have internet and lan access via the phone…

I’m just waiting for registration on SNB so will post on there also…

I have tried a number of things and nothing seems to make the slate connect to the lan and still keep internet… seems to be a few similar issues from these modems too…

im very unfamiliar with this kind of thing so just finding my way… but just assume i’m a dummy as a general rule…

Thanks again for your continued guidance… so SSH into router…

OK so client ovpn file is…
dev tun
proto udp
remote 1194
resolv-retry infinite
ncp-ciphers AES-128-GCM:AES-256-GCM:AES-128-CBC:AES-256-CBC
comp-lzo adaptive
keepalive 15 60
remote-cert-tls server


Server is…
daemon ovpn-server2
topology subnet
proto udp
port 1194
dev tun22
txqueuelen 1000
data-ciphers AES-128-GCM:AES-256-GCM:AES-128-CBC:AES-256-CBC
comp-lzo adaptive
keepalive 15 60
verb 3
push “route vpn_gateway 500”
push “dhcp-option DNS”
plugin /usr/lib/ openvpn
ca ca.crt
dh dh.pem
cert server.crt
key server.key
script-security 2
up ‘ovpn-up 2 server’
down ‘ovpn-down 2 server’
status-version 2
status status 5

# Custom Configuration
sndbuf 524288
rcvbuf 524288
push “sndbuf 524288”
push “rcvbuf 524288”

I dont see anything there…

Screen shots of Asus

image752×362 14.8 KB

image756×767 24.7 KB

And Finally the log from the router as the VPN connects

Jul 5 19:23:33 ovpn-server2[19849]: client/ MULTI_sva: pool returned IPv4=, IPv6=(Not enabled)
Jul 5 19:23:33 ovpn-server2[19849]: client/ MULTI: Learn: → client/
Jul 5 19:23:33 ovpn-server2[19849]: client/ MULTI: primary virtual IP for client/
Jul 5 19:23:33 ovpn-server2[19849]: client/ Data Channel: using negotiated cipher ‘AES-128-GCM’
Jul 5 19:23:33 ovpn-server2[19849]: client/ Outgoing Data Channel: Cipher ‘AES-128-GCM’ initialized with 128 bit key
Jul 5 19:23:33 ovpn-server2[19849]: client/ Incoming Data Channel: Cipher ‘AES-128-GCM’ initialized with 128 bit key
Jul 5 19:23:33 ovpn-server2[19849]: client/ SENT CONTROL [client]: ‘PUSH_REPLY,route vpn_gateway 500,dhcp-option DNS,sndbuf 524288,rcvbuf 524288,route-gateway,topology subnet,ping 15,ping-restart 60,ifconfig,peer-id 0,cipher AES-128-GCM’ (status=1)

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