OPNsense Forum

Archive => 21.1 Legacy Series => Topic started by: JasMan on May 23, 2021, 12:31:20 pm

Title: Local DNS resolving is not working after restart of Wireguard
Post by: JasMan on May 23, 2021, 12:31:20 pm

Hey,

When I restart the Wireguard service, OPNsense is no longer able to resolve DNS names by itself. The LAN clients are all fine, only OPNsense can't resolve e.g. FQDN aliases.

Quote

2021-05-23T12:21:01    unable to resolve download.qnap.com for alias WAN_QNAP_Download

I've to restart the appliance to resolve the issue.

I'm using Unbound as DNS resolver. It's listening on a loopback adapter, which address I have configured in the DHCP DNS server options for the clients as well as in the general settings of OPNsense (System: Settings: General)

I can remember that there was a similiar issue with OpenVPN, but I can't find the thread/issue on Github.

Any recommendations?

EDIT: Found out that saving the genereal settings of OPNsense again also solves the issue.

Title: Re: Local DNS resolving is not working after restart of Wireguard
Post by: Greelan on May 23, 2021, 12:39:41 pm

WG overwrites resolv.conf with the DNS servers specified in its config. Suggest you remove those

Title: Re: Local DNS resolving is not working after restart of Wireguard
Post by: JasMan on May 23, 2021, 12:54:25 pm

@Greelan: Yep, the WG config contained a wrong DNS server (typo). Solved. Thank you :)