01-24-2017 01:22 PM
We are using 2901 router someone hack the router and use our internal extension for dialing international calling outside ? How it is possible that someone use our internal extension.
01-24-2017 02:45 PM
We are using 2901 router someone hack the router and use our internal extension for dialing international calling outside ?
No one hacked into the router. I suspect the culprit brute force the SIP credentials between the router and the SIP provider and used that to make unauthorized calls.
01-25-2017 08:40 AM
It's called Toll Fraud, and there is an article that discusses the problem, the risks, and the mitigations:
http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-express/107626-cme-toll-fraud.html
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