SIP Protection & why it's IMPORTANT

Cloud Kinnekt's SIP Protect Module provides protection from SIP attacks.
Brute-force break-in attempts and Denial of Service attacks are quite frequent and an unpredictable threat.

Unprotected CloudPBX systems are very sensitive to these kind of attacks.
The most common consequences of this kind of network attack are system downtime, call quality issues due to an overloaded network, direct financial loss due to network instability and unauthorised calls being made on your account to high call rate overseas countries.

Our SIP Protection Module's main purpose is to prevent those attacks.

Auto Provisioning Attack Detection

Auto-provisioning service is generally considered one of the most vulnerable spots of a CloudPBX system.

SIP Protect covers this segment as well through the integrated TFTP Brute Force attack detection. An active attacker can redirect profile provisioning request and change the configuration parameters. Then the attacker can redirect phone calls through a malicious server, change passwords, turn the phone into a bug, and exfiltrate system logs (including those numbers dialed by a user).

Advanced Threat Detection

Unlike other similar solutions, SIP Protect works with LIVE SIP traffic, constantly monitoring SIP packets being received.
Potential attacks are instantly detected and SIP Protect updates the firewall rules and blocks IP addresses from which the attack is coming for a specific amount of time, these are then listed in the table to the right and updated regularly.
To detect SIP attacks, SIP Protect uses the following advanced detection techniques: Pattern recognition, SIP Scanners protection (immediately blocking known SIP scanners), TFTP brute force protection, and SIP protocol anomaly detection.

Dynamic Blocking and Unblocking

SIP Protect features a fully automated attack protection system which blocks attacks more efficiently than most other solutions.

In the case of an attack, it updates the firewall rules and blocks IP addresses from which the attack is coming for a specific amount of time.

If attacks stop in a certain period of time, SIP Protect unblocks compromised IP addresses automatically.

Updated: 06/02/2026 0930 AEDT

SYD Cluster

IP Address
Country
Type
Device
Unblock In

BNE Cluster

IP Address
Country
Type
Device
Unblock In

203.121.198.4

Australia

22h 46m 3s

146.88.22.28

Australia

15h 55m 5s

58.84.150.3

Australia

12h 42m 5s

117.20.68.190

Australia

12h 31m 38s

58.84.143.77

Australia

8h 18m 36s

116.204.144.241

Australia

8h 8m 34s

58.84.137.153

Australia

6h 17m 14s

58.84.150.7

Australia

5h 23m 24s

146.88.22.9

Australia

4h 38m 38s

1.146.39.247

Australia

Grandstream HT802 1.0.53.3

2h 57m 22s

58.84.150.1

Australia

2h 6m 24s

Report abuse