fix(dns): improve DNS server reliability and compatibility #998
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…apple#696, apple#834) - Bind DNS server to network gateway addresses instead of only localhost - Detect stale nameserver after network migration and refresh resolvers - Add --dns-tcp flag to force TCP DNS queries for unreliable networks - Inherit host search domains for Tailscale/VPN compatibility
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Fixes #817, #696, #834
Type of Change
Motivation and Context
The DNS server now binds to network gateway addresses instead of only localhost, allowing containers to resolve hostnames correctly across different network configurations. This also fixes stale nameserver detection after network migration by refreshing resolvers when the network changes. A new --dns-tcp flag forces TCP for DNS queries on unreliable networks, and host search domains are now inherited for compatibility with Tailscale and other VPN configurations.
Testing