Source note · SIP scanning and telephony denial of service
Cisco's hardening guide warns against catch-all dial-peer patterns such as destination-pattern .T and recommends specific number ranges or SIP URIs instead.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Unified Border Element (CUBE)
- Subsystem
- Hardening - call routing
- Deployment
- on-premises
- Region
- not restricted
- Release range
- as of 2023-04-10
- Checked
- 2026-09-25
Sources
- Cisco Guide to Harden Cisco Unified Border Element (CUBE) Enterprise Devices — Cisco Systems · tier 2 current vendor documentation · Call routing / toll fraud section (generic dial-peer patterns)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP scanning and telephony denial of service: source note sip-scanning-tdos-harden-avoid-catchall. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-scanning-tdos-harden-avoid-catchall
BibTeX
@misc{warmtransfer-claim-sip-scanning-tdos-harden-avoid-catchall,
title = {SIP scanning and telephony denial of service: source note sip-scanning-tdos-harden-avoid-catchall},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-scanning-tdos-harden-avoid-catchall},
note = {Source note sip-scanning-tdos-harden-avoid-catchall, checked 2026-09-25}
}