Port
Port 500 — IKE / IPsec
Port 500 (UDP) is used by IKE / IPsec. Internet Key Exchange — sets up IPsec VPN tunnels.
Port 500 at a glance
| Property | Value |
|---|---|
| Port number | 500 |
| Transport | UDP |
| Service | IKE / IPsec |
| Category | Well-known port |
What it is used for
Internet Key Exchange — sets up IPsec VPN tunnels.
Security considerations
Keep IKE/IPsec patched; use strong DH groups.
See our full TCP/UDP port reference and learn how firewalls filter ports in the CyberOps course.
Frequently asked questions
What is port 500 used for?
Port 500 (UDP) is used by IKE / IPsec. Internet Key Exchange — sets up IPsec VPN tunnels.
Is port 500 TCP or UDP?
Port 500 uses UDP.
Is it safe to open port 500?
Keep IKE/IPsec patched; use strong DH groups.
Related
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