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FAQ: Which Ports are used in IPSec NAT Traversal transmission

Publication Date:  2013-06-25 Views:  101 Downloads:  0
Issue Description
None
Alarm Information
None
Handling Process
The initial port used in IKE negotiation is 500.
After the NAT traversal capability detection and NAT gateway detection are complete, the UDP port for encapsulating ISAKMP messages is changed to 4500.
The subsequent negotiation and data transmission use port 4500.
Root Cause
None
Suggestions
None

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