Dedicated Instance network and security requirements

Publisher

Cisco Webex

URL

https://help.webex.com/en-us/article/nquhruk/Dedicated-Instance-Network-and-Security-Requirements

Published

2026-03-04

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco copyright; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• In Dedicated Instance, MRA signaling and media between the endpoints and the Expressway nodes are always encrypted. in context
• In Dedicated Instance, conditional DNS forwarding is not needed for MRA registration because Cisco pre-provisions all the external DNS records MRA requires. in context
• For Dedicated Instance, Cisco provides the domain and signs all the UC application certificates with a public Certificate Authority. in context
• Dedicated Instance Expressways may fall within the client-EKU sunset, because Cisco signs Dedicated Instance UC certificates with a public CA. No Dedicated Instance source read here says how Cisco handles this. inferred in context
• On-premises devices need the Dedicated Instance FQDN resolvable from internal DNS, done with conditional forwarders to the regional Dedicated Instance DNS servers. in context
• Cisco provides each Dedicated Instance region's service FQDN in the form <customer>.<region>.wxc-di.webex.com. in context
• Conditional forwarding is not needed for MRA registration because Cisco pre-provisions all the external DNS records MRA requires. in context
• Cisco provides the domain and signs all Dedicated Instance UC application certificates with a public certificate authority. in context
• Cisco recommends secure (TLS and SRTP) trunks from Dedicated Instance Unified CM to the PSTN gateway or CUBE for outbound PSTN calls. in context
• For Webex soft clients, administrators configure UC Manager Profiles in Control Hub for each region's Voice Service Domain. in context

Cite this source record

APA

WarmTransfer. (2026, March 4). Dedicated Instance network and security requirements. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-help-nquhruk-di-network-security

BibTeX

@misc{warmtransfer-cisco-help-nquhruk-di-network-security,
  title  = {Dedicated Instance network and security requirements},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-help-nquhruk-di-network-security},
  note   = {Cisco Webex, accessed 2026-09-24}
}