Network manager adds "reverse-DNS" for DNS IP when there are more than one IP address provided by openvpn

[kay]

Server side configuration:

server 10.25.8.0 255.255.255.0
server-ipv6 2001:db8:0:123:8000::/65

push redirect-gateway
push "dhcp-option DNS 10.25.8.1"
push "route-ipv6 2000::/3"
push redirect-gateway ipv6

NetworkManager creates this entry for dnsmasq:

dnsmasq[5628]: setting upstream servers from DBus
dnsmasq[5628]: using nameserver 10.25.8.1#53 for domain 10.in-addr.arpa

But it should create this one:

dnsmasq[5628]: using nameserver 10.25.8.1#53

When you comment-out ipv6 related strings on server side, NetworkManager works as expected.

NetworkManager version 0.9.8.8

Bug is somewhere there... https://cgit.freedesktop.org/NetworkManager/NetworkManager/log/src/dns-manager/nm-dns-dnsmasq.c (where split FALSE / TRUE used)

[kay (kay-diam)]

Looks like it was fixed here: https://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/src/dns-manager/nm-dns-dnsmasq.c?id=ae9e82354a9c1b2247b7d071ed62acd9e83ae27b

[kay (kay-diam)]

In case when openvpn server has this configuration:
push "dhcp-option DNS 10.25.8.1 *"

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Mathieu Trudel-Lapierre (cyphermox)]

We carry the mentioned commit in Xenial and yakkety now.

[kay (kay-diam)]

That is obvious, but what about Trusty?

[kay (kay-diam)]

It still doesn't work even in Xenial. When I use 'push "dhcp-option DNS 10.25.8.1 *"', network manager prints "none" in log, when it actually should use this DNS as a global DNS.