Sonarr unable to connect to any indexers

[Hobart]

No matter the indexer I select, when I run test, the error shows:

Unable to connect to indexer, check the log for more details

When I check the log, I see:

15-10-8 13:10:44.4|Debug|Newznab|Downloading Feed https://api.oznzb.com/api?t=tvsearch&cat=5030,5040&extended=1&apikey=&offset=0&limit=100
15-10-8 13:10:44.4|Warn|Newznab|Unable to connect to indexer: Error: NameResolutionFailure

System.Net.WebException: Error: NameResolutionFailure
at System.Net.HttpWebRequest.EndGetResponse (IAsyncResult asyncResult) [0x00000] in :0
at System.Net.HttpWebRequest.GetResponse () [0x00000] in :0
at NzbDrone.Common.Http.HttpClient.ExecuteWebRequest (NzbDrone.Common.Http.HttpRequest request, System.Net.HttpWebRequest webRequest) [0x00000] in :0

15-10-8 13:10:44.4|Warn|NzbDroneErrorPipeline|Invalid request Validation failed:
– Unable to connect to indexer, check the log for more details

I get the same error with all of my indexers now. This all seemed to happen around the time I did an update.

Any ideas?

[markus101]

DNS lookups are failing, double check your DNS configuration/restart Sonarr.

[Hobart]

Is there something specific related to DNS lookups wihin Sonnar, or is this a setting that I need to double check on my server?

[markus101]

DNS on the entire server, not directly in Sonarr.

Sonarr uses mono which uses the system’s DNS settings to do domain lookups. Mono will cache DNS lookups, I’m not sure if it caches failed lookups or not, but if the DNS is working on the server (you can ping your indexers) and Sonarr is still failing, try restarting Sonarr.

[Hobart]

I’ve tried a restart numerous times, but to no avail.

Everything else seems to be issue free at this point on Sonarr, and all other applications on my server.

My DNS for my server is my default gateway which I imagine then uses its internal DNS server settings. That would be my guess at least.