The two intersite gateways exchange directory updates over HTTP on port 80 or HTTPS on port 443, and exchange messages over SMTP on port 25, either directly or through a smart host.

Checked 2026-09-25

Both gateways must be able to route to each other via HTTP on port 80 or HTTPS on port 443
Vendor
Cisco
Product
Unity Connection
Subsystem
intersite networking
Deployment
on-premises
Region
not restricted
Release range
Release 15
Checked
2026-09-25

Sources

Cite this note

APA

WarmTransfer. (2026, September 25). Unity Connection networking: source note unity-connection-networking-intersite-ports. WarmTransfer. https://warmtransfer.net/knowledge/claims/unity-connection-networking-intersite-ports

BibTeX

@misc{warmtransfer-claim-unity-connection-networking-intersite-ports,
  title  = {Unity Connection networking: source note unity-connection-networking-intersite-ports},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/unity-connection-networking-intersite-ports},
  note   = {Source note unity-connection-networking-intersite-ports, checked 2026-09-25}
}

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