[StackOverflow/docker] reconnecting (failed to send authentication request: failed to fetch CRL. errors encountered: read tcp read: connection reset by peer)

### ROOT CAUSE The error "read tcp read: connection reset by peer" indicates a network issue where the remote server abruptly closed the connection during the CRL fetch. This can occur due to: 1. Network instability or misconfiguration (e.g., firewall rules blocking the connection). 2. Docker-specific issues like incorrect network settings or resource constraints. 3. Server-side problems (e.g., the CRL server being overloaded or unreachable). ### CODE FIX To resolve this, ensure the following: 1. **Network Connectivity**: Verify the CRL server is reachable from the Docker container using `ping` or `curl` within the container. 2. **Firewall Rules**: Check if any firewall (e.g., `ufw`, `iptables`) blocks traffic to the CRL server's port (typically 443 for HTTPS). 3. **Docker Network Configuration**: Use the `--network host` flag to leverage the host's network stack, bypassing Docker's default bridge networking. **Example Fix**: ```bash # Test connectivity from the container docker exec curl -I https://crl.example.com # If blocked by firewall, allow outbound traffic sudo ufw allow out 443/tcp # Recreate the Docker container with host networking docker run --network host ``` If the issue persists, investigate server-side configurations (e.g., CRL expiration, server logs) and ensure the CRL URL is correct.