Asterisk security
Asterisk security without guesswork.
Asterisk powers millions of trunks worldwide and attracts constant SIP scans. SipRadar combines remote PBX audits with real-time threat feeds so you harden pjsip, ACLs, and firewall rules with data, not folklore.
Asterisk is a high-value target
Exposed SIP ports, weak extension passwords, and permissive guest contexts are the top causes of Asterisk compromise. Attackers use automated tools to REGISTER thousands of extensions and route premium calls within minutes.
Audit first, block continuously
Run our free PBX scanner to find exposed services and credential risks. Then wire SipRadar's blacklist into Fail2Ban or your edge firewall to stop known fraud infrastructure before it reaches chan_pjsip.
How SipRadar helps
Remote Asterisk audit
Scan your public SIP endpoint for open ports, TLS issues, and common misconfigurations without installing agents.
pjsip ACL guidance
We document deny/permit patterns and provide threat feeds compatible with network-level blocking upstream of Asterisk.
Fail2Ban jails
Pre-built filters integrate SipRadar threat scores with your existing Asterisk log monitoring.
Weekly automated scans
Single PBX and higher plans include scheduled audits with email reports so drift is caught early.
Block at the edge, protect chan_pjsip
The most effective Asterisk security layers network blocking (iptables, cloud SG) with strong pjsip auth. SipRadar feeds the network layer; our audit report tells you what to fix inside Asterisk.
FAQ
Frequently asked questions
Common questions about Asterisk security and how SipRadar fits your VoIP security stack.
Ask a question →No for blocking. Use network-level or Fail2Ban integration. The audit may recommend dialplan and ACL changes inside Asterisk based on findings.