DNS queries often resolve to 0.0.0.0

[ramnit72]

@pe1chl

The reason the default timeout was increased to 30s is that with a short timeout, the service might reply after that time and the reply is discarded rather than added to the cache.

While the DNS timeout will usually be set to a much smaller value, a delayed reply could still be useful for later queries.

Very good to know, thank you!