Issue with manually specifying DNS in client config (dhcp-option DNS)

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gyrex
OpenVpn Newbie
Posts: 2
Joined: Wed Jan 13, 2021 4:40 am

Issue with manually specifying DNS in client config (dhcp-option DNS)

Post by gyrex » Wed Jan 13, 2021 4:46 am

Hi everyone,

I'm hoping someone might be able to help. I have an ASUS router which uses openVPN and spits out a config file to load into my OpenVPN client.

The issue is that when I connect with my OpenVPN client in MacOS or Windows, the client uses the ISP's DNS server rather than the DNS server running on the router (10.11.12.1). This means that I can't easily find local clients using their server name.

I've tried modifying the client config file and specifying the DNS server but the client ignores this (confirmed with nslookup). If I use the Tunnelblick client everything works fine.

This is my config file:

Code: Select all

remote router.domain.com.au 1194
float
nobind
proto udp
pull-filter ignore "dhcp-option DNS"
pull-filter ignore "dhcp-option DNS6"
dhcp-option DNS 10.11.12.1
dhcp-option DOMAIN domain.local
dev tun
sndbuf 0
rcvbuf 0
keepalive 15 60
comp-lzo adaptive
auth-user-pass
client
auth SHA1
remote-cert-tls server
Can anyone help please?

User avatar
TinCanTech
OpenVPN Protagonist
Posts: 8374
Joined: Fri Jun 03, 2016 1:17 pm

Re: Issue with manually specifying DNS in client config (dhcp-option DNS)

Post by TinCanTech » Wed Jan 13, 2021 7:02 am

Tunnelblick has a a good log .. you should start there.

gyrex
OpenVpn Newbie
Posts: 2
Joined: Wed Jan 13, 2021 4:40 am

Re: Issue with manually specifying DNS in client config (dhcp-option DNS)

Post by gyrex » Thu Jan 14, 2021 12:51 am

TinCanTech wrote:
Wed Jan 13, 2021 7:02 am
Tunnelblick has a a good log .. you should start there.
Thanks for your response. Tunnelblick works perfectly so I'm not sure what the log will reveal but I'll have a look anyway.

I'm trying to understand why the OpenVPN client seems to ignore the DNS server entries.

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