Source note · Setting up certificates on Cisco Expressway
ACME on Expressway-E needs inbound TCP 80 from the internet to every Expressway-E peer, because the requester must answer on port 80 for each domain in the CSR.
Checked 2026-09-30
Let's Encrypt must be able to access port 80 on all peers in the cluster
- Vendor
- Cisco
- Product
- Cisco Expressway
- Subsystem
- acme
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X15.5
- Checked
- 2026-09-30
Sources
- Cisco Expressway Certificate Creation and Use Deployment Guide (X15.5) - Using ACME on Expressway-E — Cisco Systems · tier 2 current vendor documentation · Using ACME on Expressway-E > prerequisites
Cite this note
APA
WarmTransfer. (2026, September 30). Setting up certificates on Cisco Expressway: source note expressway-certificate-setup-acme-port-80. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-certificate-setup-acme-port-80
BibTeX
@misc{warmtransfer-claim-expressway-certificate-setup-acme-port-80,
title = {Setting up certificates on Cisco Expressway: source note expressway-certificate-setup-acme-port-80},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-certificate-setup-acme-port-80},
note = {Source note expressway-certificate-setup-acme-port-80, checked 2026-09-30}
}