This project is an effective real time system to block Internet Revenue Share Fraud in SIP networks. It is based in advanced algorithms developed since 2014. We give preference for predictive algorithms instead of anomaly detection that in our judgment delays the detection of the attack. This new version is much more effective and simpler. What has changed since the version 1. 

1 – VNF – TFPS is now a virtualized network function. So it consumes a single instance and it is provisioned easily by a shell script configured during the launch.  VNFs usually do not have an interface, they only have APIs to provision, get status and statistics. 

2 – Parameters for each customer are learned directly by using an IVR. 

3 – Improved the detection of malicious IPs using a new database. 

4 – Additional security with Voice Captcha and PIN for new destinations


Security Requirements

This project was created to run behind a firewall. The only system with access to this server should be the softswitch or PBX.



Our policy of pricing is transparent, TFPS is commercialized the the following way.
You may use and try TFPS on the AWS Marketplace, there is a 7 day free trial. Please contact us if you need any help with the onboarding.
Price List TFPS  
TFPS-OPTFPS On Premise on VMWARE of ODF formart (One Time Fee)US$3000.00
TFPS-CloudTFPS ON AWS CloudPlease check the AWS Marketplace
TFPS-IntegrationInstallation and Integration to the SoftSwitch or PBXUS$1000.00
TFPS-SupportSupport Incident (Priority)US$100.00
We reserve the right to change the prices to reflect changing market conditions without previous notice.  
Please consult, if the company is a large phone company with advanced requirements.  


This project requires:

Debian 10 Buster
OpenSIPS 3.2 – All modules
Asterisk 16 – Default installed with apt-get
Asterisk TTS –\ msmtp – smtp client
mailutils – email client
m4 – GNU m4 preprocessor
ipabusedb key


The installation is made using SSH. Please use ssh or putty to access your instance.

Deploy the database to MySQL

sudo mysql < fps.sql

Configure the system by editing the file defines.m4, pay attention to the backticks. Use nano or vi to edit the file

Go to the directory below

cd /usr/src/tfps
vi defines.m4
define(`PRIVATE_IP', `')          #Private IP of the server
define(`PUBLIC_IP', `')          #Public IP of the server
define(`PORT', `5060')                        #Port of the Server
define(`SQL_ACCOUNT',`root')                  #SQL account, always use root
define(`SQL_PASSWORD', `')                    #SQL password leave blank, mysql is running without external access
define(`ABUSE_DB_KEY', `')  #IP abuse DB key (obtained at
define(`BUSINESS_HOURS',`America/New_York|20210104T090000|21000104T170000||WEEKLY|||MO,TU,WE,TH,FR')        #Define business hours, see format at the RFC2445 (Timezone|StartDate|EndDate|Periodicity|||Days of week)
define(`ISP_EMAIL',`from_email')                      #Email in the From address
define(`NOTIFICATION_EMAIL',`some_email')             #Email where to send the notifications
define(`AUTHORIZE_METHOD',`503')                      #503 - (Use 503/603 to authorize/deny calls), or 302 (Send 302 Redirect) 
define(`VERIFICATION_METHOD',`CAPTCHA')               #CAPTCHA/PIN (CAPTCHA, simpler for the user, PIN, safer, but have to be distributed)
define(`PIN',`6578')                                  #PIN to authorize calls if the method is PIN
define(`MAX_CAPTCHAATTEMPTS',`3')               #Max failed capctha_attempts
define(`CACHE_BLOCK_TIME',`3600')               #Block failed captcha for this time
define(`MAX_CONCURRENT',`5')                    #Maximum number of concurrent calls
define(`SMTP_HOST',`some_host.some_domain')            #EMAIL ACCOUNT CONFIGURATION
define(`SMTP_EMAIL',`[email protected]_domain')     #EMAIL ACCOUNT CONFIGURATION
define(`SMTP_ACCOUNT','some_account')           #EMAIL ACCOUNT CONFIGURATION
define(`SMTP_USER',`some_user')                 #EMAIL ACCOUNT CONFIGURATION
define(`SMTP_PASSWORD',`some_password')         #EMAIL ACCOUNT CONFIGURATION

After filling the file defines.m4 (you will need an api key for ipabusedb with your own definitions, then run

sudo ./

Restart OpenSIPS and Asterisk

systemctl restart opensips
systemctl restart asterisk

Client Installation

There are two modes of operation. 503/603 and Redirect. In the 503/603 the system will respond with 603 each time it detects a fraud. This response shouldn’t failover to the next gateway. When receiving a 503, the system should failover to the next gateway and complete the call.

If in redirect mode, the system will return a 302 Moved Temporarily with a prefix A00 in the Request URI, in the client system, strip the A00 and complete the call. See the docs

Admin Options

TFPS was designed to work hands free. However there are a few situations where you may want to interfere. For this we have the CLI utility tfpsctl.

To remove a user use:

sudo tfpsctl remove username domain

To reset the quotas of a user:

sudo tfpsctl reset username domain

To list users

sudo tfpsctl list