Difference between revisions of "How to block calls"
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Instructions on how to block calls, which have a specific CallerID can be found [[ How_to_block_a_call_with_a_specific_CallerID | here]]. | Instructions on how to block calls, which have a specific CallerID can be found [[ How_to_block_a_call_with_a_specific_CallerID | here]]. | ||
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=Block calls with a specific Destination= | =Block calls with a specific Destination= | ||
Instructions on how to block calls to some specific destinations can be found [[ Block_some_Destination_to_User | here]]. Destinations can be blocked for a specific User, as well as for all Users. | Instructions on how to block calls to some specific destinations can be found [[ Block_some_Destination_to_User | here]]. Destinations can be blocked for a specific User, as well as for all Users. | ||
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=Block calls with short destination/CallerID numbers= | =Block calls with short destination/CallerID numbers= | ||
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The same can be done with short CallerIDs: CallerID localization rules need to be used instead of Destination localization rules. | The same can be done with short CallerIDs: CallerID localization rules need to be used instead of Destination localization rules. | ||
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=Block all calls from a specific IP= | =Block all calls from a specific IP= | ||
Fail2ban blocks all IPs which try to make to many unauthorized calls. However, sometimes there is a need to block all traffic, which is coming from a specific IP, manually. This can be done using ''iptables''. | Fail2ban blocks all IPs which try to make to many unauthorized calls. However, sometimes there is a need to block all traffic, which is coming from a specific IP, manually. This can be done using ''iptables''. | ||
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Instructions on how to manage iptables and block/unblock IPs can be found [[How_to_block_someone's_IP | here]]. | Instructions on how to manage ''iptables'' and block/unblock IPs can be found [[How_to_block_someone's_IP | here]]. | ||
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=Block a large amount of specific destination numbers= | =Block a large amount of specific destination numbers= | ||
It is possible to block a list of specific destination numbers. [[Mobile_Number_Portability_Addon | MNP add-on]] is used to do this. | It is possible to block a list of specific destination numbers. [[Mobile_Number_Portability_Addon | MNP add-on]] is used to do this. | ||
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'''Cut''': 112233, '''Add''': , '''Change LCR to This LCR''': Empty LCR | '''Cut''': 112233, '''Add''': , '''Change LCR to This LCR''': Empty LCR | ||
Now once the call comes to 37067012346, a prefix will be added (11223337067012346). Localization rule will be applied and this call will be routed to an empty LCR. Therefore such call will fail. | Now once the call comes to 37067012346, a prefix will be added (11223337067012346). Localization rule will be applied and this call will be routed to an empty LCR. Therefore such call will fail. | ||
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= | =Block calls by using Blacklist functionality= | ||
[[Dynamic_Blacklist_Functionality |Blacklist functionality]] is based on a smart logic which puts a 'score' on the call by its SRC, DST or SIP signaling IP and allows blocking calls with a high score. For example, you can block a destination/CallerID number, if it made X calls during Y seconds. | [[Dynamic_Blacklist_Functionality |Blacklist functionality]] is based on a smart logic which puts a 'score' on the call by its SRC, DST or SIP signaling IP and allows blocking calls with a high score. For example, you can block a destination/CallerID number, if it made X calls during Y seconds. | ||
<br> More information can be found [[Dynamic_Blacklist_Functionality |here]]. | <br> More information can be found [[Dynamic_Blacklist_Functionality |here]]. | ||
Revision as of 11:54, 11 February 2015
Unwanted calls can be blocked depending on various parameters: CallerID, destination number, IP, etc.
Block calls with a specific CallerID
Instructions on how to block calls, which have a specific CallerID can be found here.
Block calls with a specific Destination
Instructions on how to block calls to some specific destinations can be found here. Destinations can be blocked for a specific User, as well as for all Users.
Block calls with short destination/CallerID numbers
It is possible to block a call which has a destination number with a specific number of digits. This way calls to short numbers can be blocked.
Instructions on how to block short destination numbers can be found here.
The same can be done with short CallerIDs: CallerID localization rules need to be used instead of Destination localization rules.
Block all calls from a specific IP
Fail2ban blocks all IPs which try to make to many unauthorized calls. However, sometimes there is a need to block all traffic, which is coming from a specific IP, manually. This can be done using iptables.
Instructions on how to manage iptables and block/unblock IPs can be found here.
Block a large amount of specific destination numbers
It is possible to block a list of specific destination numbers. MNP add-on is used to do this.
MNP add-on allows to upload specific numbers with a prefix to the database. If a call comes with the destination number, which is in the MNP database, a prefix will be added to the destination number. Then a call can be blocked using Localization rules.
For example, you upload such numbers and prefixes:
number, prefix 37067012346; 112233 37067012347; 112233 37067012348; 112233
Then you create a Localization rule:
Cut: 112233, Add: , Change LCR to This LCR: Empty LCR
Now once the call comes to 37067012346, a prefix will be added (11223337067012346). Localization rule will be applied and this call will be routed to an empty LCR. Therefore such call will fail.
Block calls by using Blacklist functionality
Blacklist functionality is based on a smart logic which puts a 'score' on the call by its SRC, DST or SIP signaling IP and allows blocking calls with a high score. For example, you can block a destination/CallerID number, if it made X calls during Y seconds.
More information can be found here.
