Firewall requirements for MetroCluster Tiebreaker
MetroCluster Tiebreaker uses a number of ports to communicate with specific services.
The following table lists the ports that you must allow in your firewall:
| Port/services | Source | Destination | Purpose |
|---|---|---|---|
443 / TCP | Tiebreaker | Internet | Sending AutoSupport messages to Lenovo |
22 / TCP | Management host | Tiebreaker | Tiebreaker Management |
443 / TCP | Tiebreaker | MetroCluster management LIFs | Secure communications via HTTP (SSL) |
22 / TCP | Tiebreaker | MetroCluster management LIFs | Secure communications via SSH |
443 / TCP | Tiebreaker | MetroCluster management LIFs | Secure communications via HTTP (SSL) |
22 / TCP | Tiebreaker | MetroCluster management LIFs | Secure communications via SSH |
162 / UDP | Tiebreaker | SNMP trap host | Used to send alert notification SNMP traps |
ICMP (ping) | Tiebreaker | MetroCluster management LIFs | Check if cluster IP is reachable |
ICMP (ping) | Tiebreaker | MetroCluster management LIFs | Check if node IP is reachable |
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