Source note · Unified CM security hardening
The Cipher Management page warns that configuring hmac-sha2-512 as SSH MAC, or restricting to GCM ciphers or a single key-exchange algorithm, can break DRS and CDR functionality.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- cipher management
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs
- Checked
- 2026-09-25
Sources
- Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Cipher Management — Cisco Systems · tier 2 current vendor documentation · Cipher Management > SSH field cautions
Cite this note
APA
WarmTransfer. (2026, September 25). Unified CM security hardening: source note cucm-security-hardening-cipher-drs-cdr-risk. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-security-hardening-cipher-drs-cdr-risk
BibTeX
@misc{warmtransfer-claim-cucm-security-hardening-cipher-drs-cdr-risk,
title = {Unified CM security hardening: source note cucm-security-hardening-cipher-drs-cdr-risk},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-security-hardening-cipher-drs-cdr-risk},
note = {Source note cucm-security-hardening-cipher-drs-cdr-risk, checked 2026-09-25}
}