This article talks about deploying permission control mechanism for call establishment in Kamailio SIP Proxy.
In many VoIP solutions, it is crutial to deploy numbering scheme and write down rules where users are/aren't allowed to call.
On top of that, a company can allow the people to call outside, for example to PSTN. The rules can change over time as well as the numbering scheme itself.
In many setups Kamailio is used as a PROXY server that takes care of routing calls to servers providing voice services, e.g. voicemail, IVR or conference calls.
There are a few things an administrator must keep in mind.
Sometimes we need to capture and parse OSPF packets for next analysis and we have a comand line only, in my case on linux server with dynamips. We should use tcpdump tool for this purpose, of course, several ways are available.
Capturing OSPF packets on the fly
The creation of network bridge among two PC's networking cards in linux consist from a few following steps:
Prepare your interfaces:
Nice book on LPIC-2 exam preparation (Linux Professionals)
https://www.lpi.org/study-resources/lpic-1-101-exam-objectives/
https://www.lpi.org/study-resources/lpic-1-102-exam-objectives/
Trying to connet from my linux terminal on Cisco ASA ssh using
ssh palo@192.168.10.1 Unable to negotiate with 192.168.10.1 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
return the error on diffie hellman unmatch.
Nice book on LPIC-1 exam preparation (Linux Professionals)
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