Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


mruane

420 posts

Ultimate Geek


#112891 26-Dec-2012 11:46
Send private message

Hi all

Has anyone come up against an issue I have with the Fritzbox 7340 and DECT, which reports that incoming calls are being received that simply did not happen!

ABout once an hour, my Missed Call log reports that I have missed a call from "Unknown" that I know for sure never happened. Clearly this must be a transient signal being developed in the device and I wondered in anyone else has experienced this and resolved it.

My Fritzbox does not have a Landline connection for phone and all calls are handled by VOIP. Currently the Landline phone connection port is not used. The only "Own Telephone Number" that I have defined is to an Asterisk box, and i have confirmed that the bogus calls signals did not originate from Asterisk.

So far, the only way around this is to create a Call Block rule to ignore calls that have no Caller ID, which is a bit draconian.  Does anyone have any other ideas about how to squash the false call signals that keep appearing in the Missed Call log?

Cheers Mike


Create new topic
sbiddle
30853 posts

Uber Geek

Retired Mod
Trusted
Biddle Corp
Lifetime subscriber

  #737325 26-Dec-2012 12:17
Send private message

My pick would be a bot running a SIP script attack against the device.

I'm not actually sure what protection against this the Fritz!box has, I should have a play over the next few days.

 
 
 

Learn cloud, mobile, security, data and web technologies with Pluralsight (affiliate link).
mruane

420 posts

Ultimate Geek


  #737331 26-Dec-2012 12:27
Send private message

I have observed this behaviour right from the first day I installed this Fritzbox and prior to creating any Local Numbers at all, my impression was that it had to be a local transient signal. It was the one reason that I did not enable the DECT base station originally. Now I see the benefits of the DECT base, and I wanted to leverage it.

So yes it could be a Bot although the one SIP connection I now have is internal i.e. the one connection is to my local ATCOM IP02 PBX rather to an external SIP provider.

I guess if the Missed Call log on your Fritzbox is not generating heaps of call records from an "Unknown" caller then I must have a suspect box!

Cheers Mike

sbiddle
30853 posts

Uber Geek

Retired Mod
Trusted
Biddle Corp
Lifetime subscriber

  #737350 26-Dec-2012 12:53
Send private message

You don't need to have a SIP registration for a bot to me scanning your system, you merely need port 5060 to be exposed to the internet.

Bots are a massive problem these days, and are the reason why you should never ever have a port forward on port 5060 unless you fully understand the security risks of doing so. I've heard of plenty of people using the likes of 2talk, setting a port forward on their router to an SPA and then finding their phone continually giving one right as the bot script hits their ATA.

I picked up a 7390 and fritz!fon while in Aussie in August and have used it for all of an hour, I really need to have a play witrh it again before I sell it.



chevrolux
4962 posts

Uber Geek
Inactive user


  #737488 26-Dec-2012 21:00
Send private message

Does sound a lot like a bot attack.

The Frtitz will intercept all packets on 5060. But I wouldn't have thought anonymous calls would be passed on to the extensions. Havent done any captures to see what exactly is going on though to confirm anything.

kornflake
409 posts

Ultimate Geek


  #737508 26-Dec-2012 21:53
Send private message

delayed/broken sip signalling?

richms
26404 posts

Uber Geek

Trusted
Subscriber

  #737518 26-Dec-2012 22:19
Send private message

Not happened for me, and I have several italk and 2talk lines configured on my fritzbox




Richard rich.ms

mruane

420 posts

Ultimate Geek


  #737529 26-Dec-2012 23:27
Send private message

So, would you say a reload of the latest firmware would be the next most useful step?

Cheers Mike



kornflake
409 posts

Ultimate Geek


  #737723 27-Dec-2012 15:30
Send private message

ring your isp

maverick
3594 posts

Uber Geek

Trusted
WorldxChange

  #737736 27-Dec-2012 16:39
Send private message

kornflake: ring your isp


Why ?




Yes I am a employee of WxC (My Profile) ... but I do have my own opinions as well Wink

             

https://www.facebook.com/wxccommunications

kornflake
409 posts

Ultimate Geek


  #737742 27-Dec-2012 16:45
Send private message

fair point, if it is delayed signalling and the person sip is with third party not alot the isp can/will do about it

Create new topic





News and reviews »

New Air Traffic Management Platform and Resilient Buildings a Milestone for Airways
Posted 6-Dec-2023 05:00


Logitech G Launches New Flagship Console Wireless Gaming Headset Astro A50 X
Posted 5-Dec-2023 21:00


NordVPN Helps Users Protect Themselves From Vulnerable Apps
Posted 5-Dec-2023 14:27


First-of-its-Kind Flight Trials Integrate Uncrewed Aircraft Into Controlled Airspace
Posted 5-Dec-2023 13:59


Prodigi Technology Services Announces Strategic Acquisition of Conex
Posted 4-Dec-2023 09:33


Samsung Announces Galaxy AI
Posted 28-Nov-2023 14:48


Epson Launches EH-LS650 Ultra Short Throw Smart Streaming Laser Projector
Posted 28-Nov-2023 14:38


Fitbit Charge 6 Review 
Posted 27-Nov-2023 16:21


Cisco Launches New Research Highlighting Gap in Preparedness for AI
Posted 23-Nov-2023 15:50


Seagate Takes Block Storage System to New Heights Reaching 2.5 PB
Posted 23-Nov-2023 15:45


Seagate Nytro 4350 NVMe SSD Delivers Consistent Application Performance and High QoS to Data Centers
Posted 23-Nov-2023 15:38


Amazon Fire TV Stick 4k Max (2nd Generation) Review
Posted 14-Nov-2023 16:17


Over half of New Zealand adults surveyed concerned about AI shopping scams
Posted 3-Nov-2023 10:42


Super Mario Bros. Wonder Launches on Nintendo Switch
Posted 24-Oct-2023 10:56


Google Releases Nest WiFi Pro in New Zealand
Posted 24-Oct-2023 10:18









Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.







Lenovo