Sjur Usken

Views on new technologies and business opportunities from Sjur Usken

Monthly Archives: December 2008

The new Fritz!box 7270


I was lucky and getting my hands on the newest router from AVM, the Fritz!Box Fon WLAN 7270 (puuuhh, easy name).

When I first heard about the Fritz!Box, the exceptional thing was the ISDN interface. I’m living in Norway, and ISDN has been a great success here since the incumbent waited with DSL investments until most of us had gotten ISDN to dial-up the Internet.

The Fritz!Box has added up on it’s cool features, mentioning, ISDN (capable of either TE or NT mode), 2 analog ports, one analog port to connect to a phone line, DECT, USB 2.0 and WLAN (802.11 a/b/g/n (!!!)) running on its respective 2,4 and 5Ghz. No wonder AVM is starting to call it a “home server”!

I’m starting with the most important, VoIP. It is capable of three concurrent calls either direction and with several technologies. You can connect up to 8 ISDN phones in the ISDN port, several phones in both the analogue ports, and associate up to 6 DECT phones to the internal DECT base statin. But remember, only three calls at the same time, whatever technology used.

The Fritz!Box has built-in answering machine, built-in soft fax which sends the fax as a PDF in your e-mail. It lets you get rid of that fax machine and paper, thank you!

On the IP interfaces, It has ADSL2+, four (4) 10/100Mbit ports (why not 1000Mbit???). If you have cable modem or fiber connection, you can use the LAN1 port for Internet access instead of the built-in ADSL2+ port. It supports all protocols (like PPPoE, PPPoA, RFC1483 and more) needed for connecting up to an ISP.

What I really fancy, is the daily reports telling me how good my calls has been.

Internet Telephony Voice Transmission
This table shows detailed information about voice transmission during Internet telephony.
Duration (*) Remote Site Coding Packets (**) Lost Delay Jitter Burst Other
0:19 (300 ms) >| G.711 54921 (-) 0.0 % 14 ms 0 ms (0 %)

The web interface is even better. It has some really good and informative overviews of the different technologies. Here is the DECT overview:

Monitor the DECT system in the Fritz unit

Monitor the DECT system in the Fritz unit

The Fritz!box has a USB 2.0 USB host port. Just plug a USB harddrive into it, and you are ready. Set a (good!) password on the share and you can access it as an FTP server from all over the Internet. AVM had also added a new Samba Server feature, [delete – with a small program installed,] so you have direct access to the USB port as a network share from all of your PCs. This is excellent for a small firm that needs to share a scanner or printer.

All in all, the Fritz!box is full of technologies, enabling it to fit most of an advance home or a small firm!
I love it!
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Asterisk vulnerabilites can be abused


I remember in the old times when Cisco was running the Call Manager on a Windows 2000 system. The Call Manager servers were always six months behind with patches and updates, and had to be protected at all costs. Caution has to be taken as always when enabling new services, and especially when it can hurt financially. PC World reports that “yes, you can abuse Asterisk with a bug for a time ago” in this article. They sited the IC3s article about VoIP fraud.

Do we need another firewall for all new services? There are several Media specialized firewalls, often called Session Border Controller that does this, but is this the way to do it? Probably not. IMHO it is to have a good security audit and overview of your own infrastructure, take control! Don’t buy yourself out of the current biggest threats, there will be new! Take control with IDS and even IPS, and have backup plans in case serious bugs and flaws makes your services vulnerable!

And good there is several other people talking about security, like Mark Collier and the folks behind the bluebox security podcast! Good job!

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