Source note · SIP scanning and telephony denial of service
The fail2ban Asterisk filter bans source IPs from Asterisk log lines such as failed registrations for wrong password, username mismatch, no matching peer, or ACL failures, and 'Rejecting unknown SIP connection'.
Checked 2026-09-25
- Vendor
- fail2ban project
- Product
- fail2ban asterisk filter
- Subsystem
- Log indicators
- Deployment
- on-premises
- Region
- not restricted
- Release range
- master branch as of 2026-09-25
- Checked
- 2026-09-25
Sources
- fail2ban/config/filter.d/asterisk.conf — fail2ban project · tier 3 vendor-maintained repositories · config/filter.d/asterisk.conf, failregex lines
Cite this note
APA
WarmTransfer. (2026, September 25). SIP scanning and telephony denial of service: source note sip-scanning-tdos-fail2ban-registration-failures. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-scanning-tdos-fail2ban-registration-failures
BibTeX
@misc{warmtransfer-claim-sip-scanning-tdos-fail2ban-registration-failures,
title = {SIP scanning and telephony denial of service: source note sip-scanning-tdos-fail2ban-registration-failures},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-scanning-tdos-fail2ban-registration-failures},
note = {Source note sip-scanning-tdos-fail2ban-registration-failures, checked 2026-09-25}
}