Specify DNS Server(s) to use.

[VertigoRay]

It would be a nice feature to be able to set the DNS Server I want to use for testing.

My PAC file acts differently when using Company DNS Servers versus outside DNS servers.

Currently, my PAC file test script changes the server DNS temporarily to run the test against Google DNS. I would like better support for this from this tool, please.

[manugarg]

This is what Claude says:

To implement it you'd need to either:

• Link a resolver library like c-ares, libunbound, or ldns (extra dependency, cross-platform build work for Linux/macOS/FreeBSD/Windows), or
• Hand-roll DNS queries over raw UDP/TCP (A + AAAA, timeouts, retries, truncation/TCP fallback, caching).

Either path is a meaningful chunk of work and a new external dependency or ~several hundred lines of resolver code — plus plumbing a -d dns_server flag through pactester, the C API, and the Python binding. c-ares is probably the lightest route.