Fix TLS hostname validation bug and add configurable validation by Aaronontheweb · Pull Request #7897 · akkadotnet/akka.net

Aaronontheweb · 2025-10-09T20:26:36Z

Summary

This PR fixes a critical TLS hostname validation bug (issue #7893) and introduces a configurable, type-safe validation system for DotNetty SSL/TLS connections.

Changes

🐛 Bug Fix (DotNettyTransport.cs:355-356)

Problem: TLS client was validating against the client's own certificate DNS name instead of the remote server address.

Fix: Changed from certificate.GetNameInfo(X509NameType.DnsName, false) to remoteAddress.Host

This bug caused incorrect hostname validation in TLS connections, particularly affecting mutual TLS scenarios.

⚙️ New Configuration Option

Added validate-certificate-hostname setting to Remote.conf:

Default: false (disabled for backward compatibility)
When enabled: Traditional TLS hostname validation (certificate CN/SAN must match target hostname)
When disabled: Only validates certificate chain against CA, ignores hostname mismatches
Use cases: Mutual TLS with per-node certificates, IP-based connections, dynamic service discovery

🔒 Type-Safe Validation System

Introduced enums to prevent primitive confusion in security-critical code:

ChainValidationMode enum (ValidateChain, IgnoreChainErrors)
HostnameValidationMode enum (ValidateHostname, IgnoreHostnameMismatch)
TlsValidationCallbacks static factory class with convenience methods:
- Create(chainValidation, hostnameValidation, log) - Main factory
- ValidateFull() - Full validation (chain + hostname)
- ValidateChainOnly() - Chain validation only
- ValidateHostnameOnly() - Hostname validation only (for testing)
- AcceptAll() - Accept all certificates (dangerous, test-only)

Benefits:

Makes validation flags independent and composable
Prevents accidental parameter swapping
Self-documenting API
Reduces ~35 lines of inline callback code to 3 lines

🔌 Programmatic API Enhancement

Extended DotNettySslSetup to expose all SSL/TLS settings:

Added RequireMutualAuthentication property (was missing from programmatic API)
Added ValidateCertificateHostname property (new setting)
Backward-compatible constructors (2, 3, and 4 parameters)
Comprehensive XML documentation

✅ Test Coverage

DotNettyMutualTlsSpec - 4 new end-to-end tests:

Hostname validation disabled with different certificates (should succeed)
Hostname validation enabled with different certificates (should fail)
Same certificate mutual TLS scenario (typical use case)
Default configuration backward compatibility check

DotNettySslSetupSpec - 3 integration tests:

Verify 2-parameter setup configures effective settings with defaults
Verify 3-parameter setup configures effective settings
Verify 4-parameter setup configures all settings correctly

All tests verify the actual consumption path through DotNettyTransportSettings.Create().

Technical Details

Chain validation and hostname validation are now fully independent:

suppressValidation=true disables chain/CA validation (for self-signed certs)
validateCertificateHostname=true/false controls hostname matching

This allows testing hostname validation with self-signed certificates using:

suppressValidation = true
validateCertificateHostname = true

Breaking Changes

None - all defaults preserve existing behavior.

Related Issues

Fixes #7893

Testing

All new tests pass:

✅ DotNettyMutualTlsSpec: 10/10 tests passed
✅ DotNettySslSetupSpec: 5/5 tests passed

…dotnet#7893) ## Summary This commit addresses GitHub issue akkadotnet#7893 by fixing a critical TLS hostname validation bug and introducing a configurable, type-safe validation system. ## Changes ### Bug Fix - **Fixed DotNettyTransport.cs:355** - TLS client was incorrectly validating against the client's own certificate DNS name instead of the remote server address - Changed from `certificate.GetNameInfo(X509NameType.DnsName, false)` to `remoteAddress.Host` ### New Configuration - Added `validate-certificate-hostname` config option to Remote.conf - Default: `false` (disabled for backward compatibility and mutual TLS flexibility) - When enabled: Traditional TLS hostname validation (CN/SAN must match target hostname) - When disabled: Only validates certificate chain, ignores hostname mismatches - Useful for: Mutual TLS with per-node certificates, IP-based connections, dynamic service discovery ### Type-Safe Validation System - Introduced enums to prevent primitive confusion in security-critical code: - `ChainValidationMode` enum (ValidateChain, IgnoreChainErrors) - `HostnameValidationMode` enum (ValidateHostname, IgnoreHostnameMismatch) - Created `TlsValidationCallbacks` static factory class with: - Main `Create()` method accepting enum parameters and logging adapter - Convenience methods: `ValidateFull()`, `ValidateChainOnly()`, `ValidateHostnameOnly()`, `AcceptAll()` - Detailed error logging with filtered SslPolicyErrors - Makes validation flags independent and composable - Replaces ~35 lines of inline callback code with 3 lines of self-documenting factory calls ### Updated SslSettings - Added `ValidateCertificateHostname` property - Updated all constructors to accept the new property - Updated `Create()` method to read from HOCON config ### Test Coverage - Extended `DotNettyMutualTlsSpec` with 4 new test cases: - `Hostname_validation_disabled_should_allow_different_certificates()` - Different certs work with validation disabled - `Hostname_validation_enabled_should_reject_different_certificates()` - Different certs fail with validation enabled - `Same_certificate_should_connect_in_mutual_tls()` - Typical mutual TLS scenario - `Hostname_validation_default_should_be_disabled()` - Verifies backward compatibility ## Technical Details Chain validation and hostname validation are now fully independent: - `suppressValidation=true` disables chain/CA validation (for self-signed certs) - `validateCertificateHostname=true/false` controls hostname matching (for per-node certs, IPs) This allows testing hostname validation with self-signed certificates by using `suppressValidation=true, validateCertificateHostname=true`. Fixes akkadotnet#7893

## Summary Extended `DotNettySslSetup` programmatic API to expose the full SSL/TLS configuration, including the newly added hostname validation setting and the existing RequireMutualAuthentication setting that was previously only available via HOCON. ## Changes ### DotNettySslSetup API - Added `RequireMutualAuthentication` property (was missing from programmatic API) - Added `ValidateCertificateHostname` property (new setting from akkadotnet#7893) - Added comprehensive XML documentation for all properties and constructors - Added backward-compatible constructors: - 2-parameter: Defaults to RequireMutualAuthentication=true, ValidateCertificateHostname=false - 3-parameter: Defaults to ValidateCertificateHostname=false - 4-parameter: Full control over all settings - Updated `Settings` property to pass all 4 parameters to `SslSettings` constructor ### Integration Tests - Added 3 integration tests in `DotNettySslSetupSpec`: - Verify 2-parameter setup configures effective DotNettyTransportSettings with expected defaults - Verify 3-parameter setup configures effective settings with specified RequireMutualAuth - Verify 4-parameter setup configures effective settings with all specified values - Tests verify the actual consumption path: ActorSystem → DotNettyTransportSettings.Create() → setup.Value.Settings - Tests validate that setup values correctly override HOCON defaults ## Backward Compatibility All existing code using the 2-parameter constructor continues to work with the same defaults: - RequireMutualAuthentication: true (matches previous HOCON-only behavior) - ValidateCertificateHostname: false (matches new HOCON default) The setup is properly consumed in `DotNettyTransportSettings.Create(ActorSystem)` which retrieves the setup via `system.Settings.Setup.Get<DotNettySslSetup>()` and calls `setup.Value.Settings` to get the fully configured `SslSettings` object.

## Changes - Explained the new independent validation system (chain vs hostname) - Added details about default certificate stores used (Windows, Linux, macOS) - Documented the `validate-certificate-hostname` setting with use cases - Added validation mode combination table - Included configuration examples for both P2P and client-server scenarios - Added comprehensive troubleshooting for hostname validation errors - Documented enhanced TLS error messages from v1.5.52 - Reduced emoji usage for more professional tone - Added links to Microsoft documentation and RFC specifications ## Key Documentation Updates ### New Sections - Certificate Validation: Independent Control - Hostname Validation setting explanation - Validation Mode Combinations table - Configuration with Hostname Validation Enabled - Enhanced error message examples ### Troubleshooting Additions - RemoteCertificateNameMismatch errors (hostname validation failures) - UntrustedRoot errors (chain validation failures) - Understanding TLS Error Messages section with real examples - Multiple fix options for each error scenario ### Technical Details - Explained which OS certificate stores are used by default - Referenced RFC 5280 and RFC 6125 for validation standards - Clarified that suppress-validation only controls chain validation - Clarified that hostname validation is separate and optional

- Add blank lines around all fenced code blocks - Add language specifiers to code blocks (text, hocon, bash, powershell) - Change dash lists to asterisk lists for consistency - Add 'hostnames' to spellcheck dictionary - Emphasize that hostname validation defaults to false (disabled)

- Remove technical setting names from headings - Use descriptive section titles instead - Change subheadings to 'Enabled/Disabled' pattern - Move technical details into content body - Fix title case linting issues This makes the documentation more scannable and separates conceptual sections from implementation details.

Aaronontheweb

Detailed my changes

Aaronontheweb · 2025-10-09T20:57:59Z

docs/articles/remoting/security.md

Cleaned up the docs and mentioned the new settings introduced in this PR, along with where certs are sourced from in the store / how they're used.

Aaronontheweb · 2025-10-09T21:02:35Z

src/core/Akka.Remote.Tests/Transport/DotNettyMutualTlsSpec.cs

        }

+        [Fact(DisplayName = "Different certificates with hostname validation disabled should connect successfully")]
+        public async Task Hostname_validation_disabled_should_allow_different_certificates()


It's a tad difficult for us to robustly test this functionality without doing things like installing custom CAs, so we're doing this all with self-signed certificates with hostname validation and CA validation both disabled.

Aaronontheweb · 2025-10-09T21:03:05Z

src/core/Akka.Remote.Tests/Transport/DotNettySslSetupSpec.cs

            });
        }

+        [Fact(DisplayName = "DotNettySslSetup with 2 parameters should configure effective DotNettyTransportSettings with defaults (RequireMutualAuth=true, ValidateHostname=false)")]


Updated the DotNettySslSetup so this stuff can get incorporated into that configuration path as well

Aaronontheweb · 2025-10-09T21:07:09Z

src/core/Akka.Remote/Configuration/Remote.conf

+        #   - Service discovery with dynamic addresses
+        #
+        # Default: false (disabled for backward compatibility and mutual TLS flexibility)
+        validate-certificate-hostname = false


New setting, for validating the hostnames on the provided certificates. This should default to false so IP-based connections can still function correctly, but it can be enabled for zero-trust environments.

Aaronontheweb · 2025-10-09T21:17:29Z

src/core/Akka.Remote/Transport/DotNetty/DotNettyTransport.cs

                IChannelHandler tlsHandler;

-                if (Settings.Ssl.SuppressValidation)
+                // Build validation callback using type-safe factory methods


Simplified the SSL callback construction using some enums to signify which behaviors we want to use - this should help reduce branching in here and make it easier to debug the SSL configuration.

Aaronontheweb · 2025-10-09T21:44:43Z

src/core/Akka.Remote/Transport/DotNetty/DotNettyTransportSettings.cs

+    /// Factory for creating TLS certificate validation callbacks with different security policies.
+    /// Provides type-safe, self-documenting methods for configuring certificate validation behavior.
+    /// </summary>
+    internal static class TlsValidationCallbacks


Builder for creating the cert validation callbacks - covered with our tests

Aaronontheweb · 2025-10-09T21:44:54Z

src/core/Akka.Remote/Transport/DotNetty/DotNettyTransportSettings.cs

+        /// Creates validation callback that validates chain but ignores hostname mismatches.
+        /// Use for: Mutual TLS with per-node certificates, IP-based connections, dynamic service discovery.
+        /// </summary>
+        public static RemoteCertificateValidationCallback ValidateChainOnly(ILoggingAdapter log)


This is the default setting

Aaronontheweb · 2025-10-09T21:52:37Z

src/core/Akka.Remote/Transport/DotNetty/DotNettyTransport.cs

                var certificate = Settings.Ssl.Certificate;
-                var host = certificate.GetNameInfo(X509NameType.DnsName, false);
+                // Use the remote address host for TLS validation, not the client's certificate name
+                var host = remoteAddress.Host;


Another important fix - the host is determined by the address of the remote host, not the client's certificate name (because client != server host names, due to how Akka.NET mesh networking works.)

Arkatufus

LGTM

…dotnet#7897) * Fix TLS hostname validation bug and add configurable validation (akkadotnet#7893) ## Summary This commit addresses GitHub issue akkadotnet#7893 by fixing a critical TLS hostname validation bug and introducing a configurable, type-safe validation system. ## Changes ### Bug Fix - **Fixed DotNettyTransport.cs:355** - TLS client was incorrectly validating against the client's own certificate DNS name instead of the remote server address - Changed from `certificate.GetNameInfo(X509NameType.DnsName, false)` to `remoteAddress.Host` ### New Configuration - Added `validate-certificate-hostname` config option to Remote.conf - Default: `false` (disabled for backward compatibility and mutual TLS flexibility) - When enabled: Traditional TLS hostname validation (CN/SAN must match target hostname) - When disabled: Only validates certificate chain, ignores hostname mismatches - Useful for: Mutual TLS with per-node certificates, IP-based connections, dynamic service discovery ### Type-Safe Validation System - Introduced enums to prevent primitive confusion in security-critical code: - `ChainValidationMode` enum (ValidateChain, IgnoreChainErrors) - `HostnameValidationMode` enum (ValidateHostname, IgnoreHostnameMismatch) - Created `TlsValidationCallbacks` static factory class with: - Main `Create()` method accepting enum parameters and logging adapter - Convenience methods: `ValidateFull()`, `ValidateChainOnly()`, `ValidateHostnameOnly()`, `AcceptAll()` - Detailed error logging with filtered SslPolicyErrors - Makes validation flags independent and composable - Replaces ~35 lines of inline callback code with 3 lines of self-documenting factory calls ### Updated SslSettings - Added `ValidateCertificateHostname` property - Updated all constructors to accept the new property - Updated `Create()` method to read from HOCON config ### Test Coverage - Extended `DotNettyMutualTlsSpec` with 4 new test cases: - `Hostname_validation_disabled_should_allow_different_certificates()` - Different certs work with validation disabled - `Hostname_validation_enabled_should_reject_different_certificates()` - Different certs fail with validation enabled - `Same_certificate_should_connect_in_mutual_tls()` - Typical mutual TLS scenario - `Hostname_validation_default_should_be_disabled()` - Verifies backward compatibility ## Technical Details Chain validation and hostname validation are now fully independent: - `suppressValidation=true` disables chain/CA validation (for self-signed certs) - `validateCertificateHostname=true/false` controls hostname matching (for per-node certs, IPs) This allows testing hostname validation with self-signed certificates by using `suppressValidation=true, validateCertificateHostname=true`. Fixes akkadotnet#7893 * Extend DotNettySslSetup to expose all SSL/TLS configuration options ## Summary Extended `DotNettySslSetup` programmatic API to expose the full SSL/TLS configuration, including the newly added hostname validation setting and the existing RequireMutualAuthentication setting that was previously only available via HOCON. ## Changes ### DotNettySslSetup API - Added `RequireMutualAuthentication` property (was missing from programmatic API) - Added `ValidateCertificateHostname` property (new setting from akkadotnet#7893) - Added comprehensive XML documentation for all properties and constructors - Added backward-compatible constructors: - 2-parameter: Defaults to RequireMutualAuthentication=true, ValidateCertificateHostname=false - 3-parameter: Defaults to ValidateCertificateHostname=false - 4-parameter: Full control over all settings - Updated `Settings` property to pass all 4 parameters to `SslSettings` constructor ### Integration Tests - Added 3 integration tests in `DotNettySslSetupSpec`: - Verify 2-parameter setup configures effective DotNettyTransportSettings with expected defaults - Verify 3-parameter setup configures effective settings with specified RequireMutualAuth - Verify 4-parameter setup configures effective settings with all specified values - Tests verify the actual consumption path: ActorSystem → DotNettyTransportSettings.Create() → setup.Value.Settings - Tests validate that setup values correctly override HOCON defaults ## Backward Compatibility All existing code using the 2-parameter constructor continues to work with the same defaults: - RequireMutualAuthentication: true (matches previous HOCON-only behavior) - ValidateCertificateHostname: false (matches new HOCON default) The setup is properly consumed in `DotNettyTransportSettings.Create(ActorSystem)` which retrieves the setup via `system.Settings.Setup.Get<DotNettySslSetup>()` and calls `setup.Value.Settings` to get the fully configured `SslSettings` object. * Update security documentation for hostname validation feature ## Changes - Explained the new independent validation system (chain vs hostname) - Added details about default certificate stores used (Windows, Linux, macOS) - Documented the `validate-certificate-hostname` setting with use cases - Added validation mode combination table - Included configuration examples for both P2P and client-server scenarios - Added comprehensive troubleshooting for hostname validation errors - Documented enhanced TLS error messages from v1.5.52 - Reduced emoji usage for more professional tone - Added links to Microsoft documentation and RFC specifications ## Key Documentation Updates ### New Sections - Certificate Validation: Independent Control - Hostname Validation setting explanation - Validation Mode Combinations table - Configuration with Hostname Validation Enabled - Enhanced error message examples ### Troubleshooting Additions - RemoteCertificateNameMismatch errors (hostname validation failures) - UntrustedRoot errors (chain validation failures) - Understanding TLS Error Messages section with real examples - Multiple fix options for each error scenario ### Technical Details - Explained which OS certificate stores are used by default - Referenced RFC 5280 and RFC 6125 for validation standards - Clarified that suppress-validation only controls chain validation - Clarified that hostname validation is separate and optional * Fix markdown linting and spellcheck issues in security docs - Add blank lines around all fenced code blocks - Add language specifiers to code blocks (text, hocon, bash, powershell) - Change dash lists to asterisk lists for consistency - Add 'hostnames' to spellcheck dictionary - Emphasize that hostname validation defaults to false (disabled) * Improve documentation heading structure and title case - Remove technical setting names from headings - Use descriptive section titles instead - Change subheadings to 'Enabled/Disabled' pattern - Move technical details into content body - Fix title case linting issues This makes the documentation more scannable and separates conceptual sections from implementation details. * added api approvals

* Fix TLS hostname validation bug and add configurable validation (#7893) ## Summary This commit addresses GitHub issue #7893 by fixing a critical TLS hostname validation bug and introducing a configurable, type-safe validation system. ## Changes ### Bug Fix - **Fixed DotNettyTransport.cs:355** - TLS client was incorrectly validating against the client's own certificate DNS name instead of the remote server address - Changed from `certificate.GetNameInfo(X509NameType.DnsName, false)` to `remoteAddress.Host` ### New Configuration - Added `validate-certificate-hostname` config option to Remote.conf - Default: `false` (disabled for backward compatibility and mutual TLS flexibility) - When enabled: Traditional TLS hostname validation (CN/SAN must match target hostname) - When disabled: Only validates certificate chain, ignores hostname mismatches - Useful for: Mutual TLS with per-node certificates, IP-based connections, dynamic service discovery ### Type-Safe Validation System - Introduced enums to prevent primitive confusion in security-critical code: - `ChainValidationMode` enum (ValidateChain, IgnoreChainErrors) - `HostnameValidationMode` enum (ValidateHostname, IgnoreHostnameMismatch) - Created `TlsValidationCallbacks` static factory class with: - Main `Create()` method accepting enum parameters and logging adapter - Convenience methods: `ValidateFull()`, `ValidateChainOnly()`, `ValidateHostnameOnly()`, `AcceptAll()` - Detailed error logging with filtered SslPolicyErrors - Makes validation flags independent and composable - Replaces ~35 lines of inline callback code with 3 lines of self-documenting factory calls ### Updated SslSettings - Added `ValidateCertificateHostname` property - Updated all constructors to accept the new property - Updated `Create()` method to read from HOCON config ### Test Coverage - Extended `DotNettyMutualTlsSpec` with 4 new test cases: - `Hostname_validation_disabled_should_allow_different_certificates()` - Different certs work with validation disabled - `Hostname_validation_enabled_should_reject_different_certificates()` - Different certs fail with validation enabled - `Same_certificate_should_connect_in_mutual_tls()` - Typical mutual TLS scenario - `Hostname_validation_default_should_be_disabled()` - Verifies backward compatibility ## Technical Details Chain validation and hostname validation are now fully independent: - `suppressValidation=true` disables chain/CA validation (for self-signed certs) - `validateCertificateHostname=true/false` controls hostname matching (for per-node certs, IPs) This allows testing hostname validation with self-signed certificates by using `suppressValidation=true, validateCertificateHostname=true`. Fixes #7893 * Extend DotNettySslSetup to expose all SSL/TLS configuration options ## Summary Extended `DotNettySslSetup` programmatic API to expose the full SSL/TLS configuration, including the newly added hostname validation setting and the existing RequireMutualAuthentication setting that was previously only available via HOCON. ## Changes ### DotNettySslSetup API - Added `RequireMutualAuthentication` property (was missing from programmatic API) - Added `ValidateCertificateHostname` property (new setting from #7893) - Added comprehensive XML documentation for all properties and constructors - Added backward-compatible constructors: - 2-parameter: Defaults to RequireMutualAuthentication=true, ValidateCertificateHostname=false - 3-parameter: Defaults to ValidateCertificateHostname=false - 4-parameter: Full control over all settings - Updated `Settings` property to pass all 4 parameters to `SslSettings` constructor ### Integration Tests - Added 3 integration tests in `DotNettySslSetupSpec`: - Verify 2-parameter setup configures effective DotNettyTransportSettings with expected defaults - Verify 3-parameter setup configures effective settings with specified RequireMutualAuth - Verify 4-parameter setup configures effective settings with all specified values - Tests verify the actual consumption path: ActorSystem → DotNettyTransportSettings.Create() → setup.Value.Settings - Tests validate that setup values correctly override HOCON defaults ## Backward Compatibility All existing code using the 2-parameter constructor continues to work with the same defaults: - RequireMutualAuthentication: true (matches previous HOCON-only behavior) - ValidateCertificateHostname: false (matches new HOCON default) The setup is properly consumed in `DotNettyTransportSettings.Create(ActorSystem)` which retrieves the setup via `system.Settings.Setup.Get<DotNettySslSetup>()` and calls `setup.Value.Settings` to get the fully configured `SslSettings` object. * Update security documentation for hostname validation feature ## Changes - Explained the new independent validation system (chain vs hostname) - Added details about default certificate stores used (Windows, Linux, macOS) - Documented the `validate-certificate-hostname` setting with use cases - Added validation mode combination table - Included configuration examples for both P2P and client-server scenarios - Added comprehensive troubleshooting for hostname validation errors - Documented enhanced TLS error messages from v1.5.52 - Reduced emoji usage for more professional tone - Added links to Microsoft documentation and RFC specifications ## Key Documentation Updates ### New Sections - Certificate Validation: Independent Control - Hostname Validation setting explanation - Validation Mode Combinations table - Configuration with Hostname Validation Enabled - Enhanced error message examples ### Troubleshooting Additions - RemoteCertificateNameMismatch errors (hostname validation failures) - UntrustedRoot errors (chain validation failures) - Understanding TLS Error Messages section with real examples - Multiple fix options for each error scenario ### Technical Details - Explained which OS certificate stores are used by default - Referenced RFC 5280 and RFC 6125 for validation standards - Clarified that suppress-validation only controls chain validation - Clarified that hostname validation is separate and optional * Fix markdown linting and spellcheck issues in security docs - Add blank lines around all fenced code blocks - Add language specifiers to code blocks (text, hocon, bash, powershell) - Change dash lists to asterisk lists for consistency - Add 'hostnames' to spellcheck dictionary - Emphasize that hostname validation defaults to false (disabled) * Improve documentation heading structure and title case - Remove technical setting names from headings - Use descriptive section titles instead - Change subheadings to 'Enabled/Disabled' pattern - Move technical details into content body - Fix title case linting issues This makes the documentation more scannable and separates conceptual sections from implementation details. * added api approvals

Aaronontheweb added 5 commits October 9, 2025 15:07

Aaronontheweb commented Oct 9, 2025

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Aaronontheweb added this to the 1.6.0 milestone Oct 9, 2025

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Arkatufus approved these changes Oct 9, 2025

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Aaronontheweb merged commit 6ccfecf into akkadotnet:dev Oct 9, 2025
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Aaronontheweb deleted the feature/fix-tls-hostname-validation branch October 9, 2025 23:26

Aaronontheweb mentioned this pull request Oct 9, 2025

V1.5 TLS Patches #7898

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Release v1.5.53 #7900

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Fix TLS hostname validation bug and add configurable validation#7897

Fix TLS hostname validation bug and add configurable validation#7897
Aaronontheweb merged 6 commits intoakkadotnet:devfrom
Aaronontheweb:feature/fix-tls-hostname-validation

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Aaronontheweb commented Oct 9, 2025

Summary

Changes

🐛 Bug Fix (DotNettyTransport.cs:355-356)

⚙️ New Configuration Option

🔒 Type-Safe Validation System

🔌 Programmatic API Enhancement

✅ Test Coverage

Technical Details

Breaking Changes

Related Issues

Testing

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