Cisco Configuration Guide,Cisco SD-WAN Controllers Release 20.8.x Release 4.2

Networking Port Reference - Expressway

Updated: September 24, 2008

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Networking Port Reference - Expressway short desc

Table 1. Basic Networking Ports for Expressway-C
Purpose	Src. IP	Src. Ports	Protocol	Dest. IP	Dest. Ports
Administrator SSH	Admin PCs	1024-65535	TCP	Expressway-C	22
Administrator HTTP*	Admin PCs	1024-65535	TCP	Expressway-C	80
Administrator HTTPS	Admin PCs	1024-65535	TCP	Expressway-C	443
Name resolution (DNS)	Expressway-C	30000-35999	UDP & TCP†	Internal name server	53
Time synchronization (NTP)	Expressway-C	123	UDP	Internal time server	123

* Expressway redirects HTTP to HTTPS by default. You don't need to open the HTTP port, but you can allow HTTP for convenience and redirect to HTTPS.

† Expressway will attempt DNS resolution over TCP if the response is too large.

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