6.1.2.35. LookupBlacklist (dialplan application)
1. LookupBlacklist - this application allows you to check a number in the blacklist database.
NOTE: This application is valid for Asterisk version 1.0.9 and above.
Syntax:
Purpose and usage
Prerequisites
Asterisk PBX configurations
iax.conf Configurations
Database Configurations
extensions.conf Configurations
2. Screenshots of what you can see on your Idefisk and on the CLI of the Asterisk PBX
3. Additional information
4. Similar dialplan applications
NOTE: This application is valid for Asterisk version 1.0.9 and above.
Syntax:
LookupBlacklist() ;There are no arguments for this application
Purpose and usage
The purpose of this application is to check whether the Caller ID is within the Asterisk’s blacklist database or not. If the number is in the database, the next executed extension will be the one with priority n+101(where n is the priority of the current extension). If it is not, then the next executed extension will be the one with priority n+1. If there is no Caller ID received, then the LookupBlacklist has no effect.
You can use this application to restrict the access to your system. The undesired numbers could be entered into the blacklist database. Thanks to this application you can decide what to do with the numbers into the blacklist. For example you can send them a text message, to inform them that they are not wanted or that their access is cut off.
You can use this application to restrict the access to your system. The undesired numbers could be entered into the blacklist database. Thanks to this application you can decide what to do with the numbers into the blacklist. For example you can send them a text message, to inform them that they are not wanted or that their access is cut off.
Prerequisites
To use this application you need a working Asterisk PBX with registered users in iax.conf, sip.conf or mgcp.conf(It depends on which protocol you would like to use) and made extensions.
To see how the application works we recommend to use our IAX softphone Idefisk. You can download it from here. Please also read our tutorial to learn how to configure it to work with Asterisk PBX.
To see how the application works we recommend to use our IAX softphone Idefisk. You can download it from here. Please also read our tutorial to learn how to configure it to work with Asterisk PBX.
Asterisk PBX configurations
NOTE: This is only an example of what for you can use this application. Of course you can use it and for other things.
iax.conf Configurations
We need three registered user in iax.conf file. This is because we are going to use the IAX2 protocol. If you want to use other protocol such as SIP or MGCP, you have to do the configurations below respectively in sip.conf or mgcp.conf.
So, we have registered the users user1, anatoliy and ivan
Type=friend means that this user can make and receive calls. Host=dynamic means that the IP is not static but dynamic through a DHCP server. Allow=all means that the line which this user will use, could support all audio codecs. Context=test - this shows that this user is working with the extensions in this context of the configuration file extensions.conf.
Type=friend means that this user can make and receive calls. Host=dynamic means that the IP is not static but dynamic through a DHCP server. Allow=all means that the line which this user will use, could support all audio codecs. Context=test - this shows that this user is working with the extensions in this context of the configuration file extensions.conf.
Database Configurations
We have to put the desired Caller ID in the Asterisk’s blacklist database.
You can achieve this either by using the DBput application or by entering the command database put manually on the CLI
In our example, we will use the manual configuration. So, we will type the command database put blacklist test 1.
You can achieve this either by using the DBput application or by entering the command database put manually on the CLI
In our example, we will use the manual configuration. So, we will type the command database put blacklist test 1.
Here, the word blacklist is the desired family in the database. The key will be the word test. Actually test is the Caller ID of the user, which access we want to forbid. The digit 1 is the value. In this case, it does not matter what would be the value. The value could be any other digit.
You can verify whether the key(test) is entered in the database by typing the command database show or database show blacklist.
You can verify whether the key(test) is entered in the database by typing the command database show or database show blacklist.
extensions.conf Configurations
On the picture above you can see our extensions.conf file.
In our example, when somebody dials 1010, the first executed extension will be the LookupBlacklist one. It will check immediately whether the Caller ID is in the Asterisk’s blacklist database.
If the Caller ID is test, i.e. it is in the blacklist, then the next executed extension will be the with priority n+101. In our example this is the extension with priority 102. It contains the SendText application. This application will send a text message to the caller. The message in our example is: Your access to our system is forbidden! Please do not try to connect to our system again!. Then a Hangup application will be executed and the line will be closed.
If the Caller ID is different from test, the next executed extension will be the one with priority n+1. In our example this extension will run the Dial application. Thanks to it the call will be connected to the user user1 through the IAX2 channel.
If no Caller ID is received through the channel, the LookupBlacklist will have no effect and the next executed extension will be again the one with priority n+1 and with the Dial application.
If you want to remove a key(Caller ID) from the family blacklist of the Asterisk’s database, you can use either the DBdel application or the database del command on the CLI
For example:
In our example, when somebody dials 1010, the first executed extension will be the LookupBlacklist one. It will check immediately whether the Caller ID is in the Asterisk’s blacklist database.
If the Caller ID is test, i.e. it is in the blacklist, then the next executed extension will be the with priority n+101. In our example this is the extension with priority 102. It contains the SendText application. This application will send a text message to the caller. The message in our example is: Your access to our system is forbidden! Please do not try to connect to our system again!. Then a Hangup application will be executed and the line will be closed.
If the Caller ID is different from test, the next executed extension will be the one with priority n+1. In our example this extension will run the Dial application. Thanks to it the call will be connected to the user user1 through the IAX2 channel.
If no Caller ID is received through the channel, the LookupBlacklist will have no effect and the next executed extension will be again the one with priority n+1 and with the Dial application.
If you want to remove a key(Caller ID) from the family blacklist of the Asterisk’s database, you can use either the DBdel application or the database del command on the CLI
For example:
database del blacklist test 1 ;where test is the key in the family blacklist with value 1
2. Screenshots of what you can see on your Idefisk and on the CLI of the Asterisk PBX
3. Additional information
For more information about extensions.conf you can check here.
For more information about iax.conf you can check here.
This application is tested with our IAX softphone Idefisk. You can download it from here. For more information about this softphone please read our tutorial.
If you would like to test this application with the SIP channel you can read our tutorials about the SIP Softphones to learn how to configure them to work with Asterisk PBX
For more information about iax.conf you can check here.
This application is tested with our IAX softphone Idefisk. You can download it from here. For more information about this softphone please read our tutorial.
If you would like to test this application with the SIP channel you can read our tutorials about the SIP Softphones to learn how to configure them to work with Asterisk PBX
4. Similar dialplan applications
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