Hackers

Actually i "just" needed a list of all countries with their area code and a column to know if its landline or mobile. This way i could use it for asterisk to know if calling landline or mobile (thus selecting different routes). Googling for area-code lists on the web takes you to lists like this one which are quite nice but not mentioning mobile destinations. But there is a neat list available at SIL's website. Copied it over to LibreOffice Calc and saved it as CSV. Nearly perfect, just that all lines for mobile numbers have mostly more than one number for mobile...

Linux/OpenWRT

set dnsmasq to listen only on local ip instead on all available interfaces:

root@tplink:~# netstat -tln
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:53             0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:2006            0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN

Comparison of Twisted-Pair Ethernet Cables

 

  • UTP - Unshielded Twisted Pair
  • STP - Shielded Twisted Pair
    • S/STP - Screened Shielded Twisted Pair (mit einem Paarschirm als Drahtgeflecht und einem Gesamtschirm als Drahtgeflecht)
    • F/STP - Foiled Screened Twisted Pair  (mit einem Paarschirm als Drahtgeflecht und einem Gesamtschirm als Folie)
  • FTP - Foiled Twisted Pair (aka U/FTP)
    • S/FTP - Shielded Foiled Twisted Pair
  • foo

If you own an UPS (Uninterruptible Power Supply) to power devices while a power failure, you sure know time is running to safely shutdown your devices. For this reason i prefer using low-power and embedded devices which don't consume that much power so are able to run longer while the outage. According to my power-meter the sum of all devices (with modems, switches and a mini-itx server) is at about 70W. My current UPS is an APC BE500GR what according to it's battery specification is just enough to run for about 20 minutes in my situation. Never compared that directly when i bought it but actually it works for less than about 10 minutes, sure the battery suffered already after one-two years usage. Recently a friend called me, talking about his company trashing 16 sealed lead-acid rechargeable batteries, if i might be interested. Even if they might not work at all, i must give it a try i thought, to use them all toghether with my UPS.