Troubleshoot Access Issues with PeoplePicker Port Tester in Minutes

Troubleshoot Access Issues with PeoplePicker Port Tester in Minutes

What it checks

• Port connectivity: confirms if the required ports for PeoplePicker are reachable.
• Firewall/ACL blocking: reveals if network filters or security rules block traffic.
• DNS resolution: verifies the target host name resolves to the correct IP.
• Latency and timeouts: shows whether delays or short timeouts cause failures.
• Authentication endpoints: ensures endpoints used for directory lookups respond correctly.

Quick step-by-step checklist (under 10 minutes)

1. Confirm target and port
   • Ensure you’re testing the correct host (FQDN or IP) and port number PeoplePicker uses.
2. Run the port test
   • Execute the PeoplePicker Port Tester against the target. Note success/failure and any error messages.
3. Check DNS
   • If the host fails, run an nslookup/dig to confirm the FQDN resolves to the expected IP.
4. Test from same network segment
   • Run the tester from a client on the same VLAN/subnet as the affected users to rule out routing issues.
5. Verify firewall rules
   • Inspect firewall or security group logs for denied connections to the target port during the test time.
6. Traceroute and latency
   • Run traceroute (tracert) to see hops and identify where packets drop; measure round-trip times.
7. Confirm service availability
   • Use telnet or netcat to open the port directly; if the port is open but PeoplePicker still fails, check service logs on the target.
8. Check certificate and TLS (if applicable)
   • If the service uses TLS, validate the certificate chain and host name; expired or mismatched certs cause failures.
9. Retry with extended timeout
   • Temporarily increase test timeout to see if transient delays are the issue.
10. Collect logs and escalate

• Save test outputs, firewall logs, and service logs; escalate to network or directory admins if needed.

Common error messages and actions

• Connection timed out: Likely blocked by firewall or routing issue — check ACLs and traceroute.
• Connection refused: Service not listening on the port — verify the target service is running.
• Name not resolved: DNS issue — check DNS records and client resolver settings.
• TLS/SSL handshake failed: Certificate problem — check certificate validity, host name, and supported protocols.
• Authentication/authorization errors after connect: Directory or service-level issue — check credentials, permissions, and service logs.

Fast diagnostics to run in parallel

• nslookup/dig for DNS
• ping/traceroute for path and latency
• telnet/nc for port open check
• Capture firewall logs for denied entries
• Review application/service logs on the target

When to involve others

• Network team: routing, firewall, or ACLs.
• Server/application owners: service not listening, auth failures, certificate issues.
• Directory/Identity team: directory service errors or permission problems.