Source note · Setting up certificates on Cisco Expressway
Expressway-C needs a certificate with both clientAuth and serverAuth EKUs because it acts as the TLS client on the UC traversal zone.
Checked 2026-09-30
- Vendor
- Cisco
- Product
- Cisco Expressway
- Subsystem
- eku
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X14 to X15.4; on X15.5 this applies to the client certificate
- Checked
- 2026-09-30
Sources
- Prepare Expressway for Client Authentication EKU Sunset in Public CA Certificates — Cisco Systems · tier 2 current vendor documentation · Certificate requirements by Expressway role, Expressway-C row
Cite this note
APA
WarmTransfer. (2026, September 30). Setting up certificates on Cisco Expressway: source note expressway-certificate-setup-eku-c-needs-both. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-certificate-setup-eku-c-needs-both
BibTeX
@misc{warmtransfer-claim-expressway-certificate-setup-eku-c-needs-both,
title = {Setting up certificates on Cisco Expressway: source note expressway-certificate-setup-eku-c-needs-both},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-certificate-setup-eku-c-needs-both},
note = {Source note expressway-certificate-setup-eku-c-needs-both, checked 2026-09-30}
}