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v2.0.0-rc10

microsoft/agent-host-protocolv2.0.0-rc10Dec 22, 2025by qdm12

Upgrading?

What changed from v2.0.0-rc9 → v2.0.0-rc10?What's new in 0.7.0 after v2.0.0-rc10?

Release notes summary

This release focuses on performance improvements for DNS over TLS, introduces new configuration options for monitoring and logging, and fixes several issues regarding TLD handling and middleware behavior.

Key Highlights

  • DNS over TLS now uses a pool of connections to improve performance by reusing TCP connections.
  • Added `HEALTH_SERVER_ADDRESS` option and `REBINDING_PROTECTION_EXEMPT_HOSTNAMES` configuration.
  • Enhanced logging capabilities for blocked elements and I/O timeouts.
  • Fixed TLD handling to correctly identify public 'site' and 'network' domains.
  • Updated Grafana dashboard schema to version 3.

Breaking Changes

  • In `pkg/nameserver`, `GetDNSServers` no longer returns localhost IPs, returns an error, and returns `[]netip.Addr` instead of `[]netip.AddrPort`.

New Features

  • DNS over TLS connection pooling
  • `HEALTH_SERVER_ADDRESS` configuration option
  • `REBINDING_PROTECTION_EXEMPT_HOSTNAMES` configuration option
  • Filter middleware logs blocked elements with a reason

Full Release Notes

## Features

- DNS over TLS now uses a pool of connections to re-use TCP connections when possible (#150)
- `HEALTH_SERVER_ADDRESS` option, defaulting to `127.0.0.1:9999`
- by default log i/o timeout errors are logged at debug level because these are fairly common
- `REBINDING_PROTECTION_EXEMPT_HOSTNAMES` option
- `pkg/middlewares/filter`: log blocked elements with a reason

## Fixes

- `internal/local`: "site" and "network" TLDs are public, not local
- `pkg/middlewares/localdns`:
  - do not log request twice on errors
  - do not debug log NXDOMAIN coded responses since these happen often especially with search domains
- `internal/support/ipv6`: handle Windows error message
- Grafana dashboard plain DNS section updated

## Go API breaking changes

- `pkg/nameserver`: `GetDNSServers`
  - does not return localhost IPs if no nameserver is found 
  - returns an eventual error
  - returns []netip.Addr instead of []netip.AddrPort since it can only be an ip address without port

## Maintenance

- Grafana JSON dashboard upgraded to newer schema version 3
- Fix documentation URLs and CI links check
- bump markdownlint from v11 to v21

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