Source note · Network readiness assessment for cloud calling
Cisco recommends turning off SIP ALG on routers and firewalls carrying Webex Calling traffic because some implementations break firewall traversal.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- firewall
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Port Reference Information for Webex Calling — Cisco Systems, Inc. (help.webex.com) · tier 2 current vendor documentation · section 'Firewall configuration'
Cite this note
APA
WarmTransfer. (2026, September 24). Network readiness assessment for cloud calling: source note network-readiness-assessment-wxc-sip-alg-off. WarmTransfer. https://warmtransfer.net/knowledge/claims/network-readiness-assessment-wxc-sip-alg-off
BibTeX
@misc{warmtransfer-claim-network-readiness-assessment-wxc-sip-alg-off,
title = {Network readiness assessment for cloud calling: source note network-readiness-assessment-wxc-sip-alg-off},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/network-readiness-assessment-wxc-sip-alg-off},
note = {Source note network-readiness-assessment-wxc-sip-alg-off, checked 2026-09-24}
}