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  • Linux USB Drive boot problem
    Universal-USB-Installer.exe from http://www.pendrivelinux.com is great tool to make any linux boot on USB flash drive, but one weird thing happened to me, I bought couple 4Gb USB flash, none of them work and giving this Syslinux load error :

    No Default or UI Configuration Directive found!...

    but when I use my smaller flash drive (ie 1Gb and 512Mb) it work just fine.

    figured out for a while, typed this on the prompt below that error message :

    grub# vmlinuz initrd=initrd.gz pmedia=cd

    with that line typ
  • openvpn simple command
    here is two simple command to have openvpn tunnel up between server and client on linux system

    on server :

    /usr/local/sbin/openvpn --port PORT --proto udp --dev tun0 --bcast-buffers 512 --fast-io --ifconfig 192.168.20.1 192.168.20.2 --comp-lzo --comp-noadapt --daemon --route some_net its_masking 192.168.20.2 --keepalive 30 90

    on client :

    /usr/local/sbin/openvpn --remote SERVERADDR --port PORT --proto udp --dev tun0 --bcast-buffers 512 --fast-io --comp-lzo --comp-noadapt --daemon --ifconfig 192.168.20.2 192.168.
  • Audiocodes Hunt Group routing table and its Routing Manipulation
    After configuring audiocodes to work with asterisk, one thing need to be done properly, to make audiocodes just route the ip call to PSTN the way asterisk want it.

    on my case here, I have my asterisk adding prefix 011 and 012 before sending it to any FXO gateway attached to my asterisk, the problem is audiocodes by default will use hunting system and use any available FXO to make a call, which I dont want it to be happen as every port is attached to different provider and I want the call to be routed properly to save the cost (and cost calcula

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