Cisco advises avoiding the Any wildcard for the search rule Source setting to minimise toll fraud risk.
Checked 2026-09-25
To minimize toll fraud risks, avoid using the 'Any' wild card for the Source setting.
- Vendor
- Cisco
- Product
- Cisco Expressway
- Subsystem
- search rules
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X15.4; current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Cisco Expressway Administrator Guide (X15.4) - Dial Plan and Call Processing — Cisco Systems · tier 2 current vendor documentation · Dial Plan and Call Processing > search rules (IP address rule guidance)
Cite this note
APA
WarmTransfer. (2026, September 25). Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-avoid-source-any. WarmTransfer. https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-avoid-source-any
BibTeX
@misc{warmtransfer-claim-expressway-b2b-setup-avoid-source-any,
title = {Setting up business-to-business calling on Cisco Expressway: source note expressway-b2b-setup-avoid-source-any},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/expressway-b2b-setup-avoid-source-any},
note = {Source note expressway-b2b-setup-avoid-source-any, checked 2026-09-25}
}