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.


scottq

3 posts

Wannabe Geek


#114771 2-Mar-2013 20:26
Send private message

Partly my fault, I had a recursive DNS server on my network which should have been accepting only authoritative requests - Stupid I know but I had a hardware failure and had to configure this machine up quickly and missed this out.

Anyway, noticed my inbound traffic spike to around 5mbps (constant) and narrowed it down to one host hitting port 53 hard.  I've updated my FW to drop the packets and have null routed them just for extra sanity, then called TelstraClear.

The tech I spoke to repeatedly said it was my responsibility to filter the traffic even after explaining I had already done so and the only further steps I could take to stop the traffic hitting my modem was to turn it off.

I've spoken to several different techs/customer support people and they have explained they don't have the tools to filter this particular traffic to my IP address.  Their reason was it could be legitimate traffic.

My question to you all, is surely this can't be true.  They manage the network and should mitigate what could be classed as a DOS attack on one of their customers.

My account is at 100% utilisation and around 50Gb per day and they can't block it.????!?!

Create new topic
Zeon
3861 posts

Uber Geek

Trusted

  #773712 2-Mar-2013 20:34
Send private message

The thing is their routers probably don't have the processing power for per packet port inspection. Usually providers will null route an IP address if required but not filter on port.

My suggestion would be to change IP addresses.




Speedtest 2019-10-14


Affiliate link
 
 
 

Affiliate link: Free kids accounts - trade shares and funds (NZ, US) with Sharesies.
scottq

3 posts

Wannabe Geek


  #773717 2-Mar-2013 20:45
Send private message

I've provided them with the IP address, they could null route it.

Zeon
3861 posts

Uber Geek

Trusted

  #773720 2-Mar-2013 20:50
Send private message

scottq: I've provided them with the IP address, they could null route it.


So the requests are only coming from a certain IP address which you want to block? Or do you mean you have multiple IP addresses and you have asked telstra to null route the one being hit?

If its coming from just a single source I don't think they can null route that as if they did it router wide, it would affect potentially tens of thousands of users who may want to legitimately connect to that IP. If it were only for you it again by a source/destination IP match and processing requirements go up considerably. Some providers offer this on a managed firewall service.




Speedtest 2019-10-14




sbiddle
30853 posts

Uber Geek

Retired Mod
Trusted
Biddle Corp
Lifetime subscriber

  #773724 2-Mar-2013 21:01
Send private message

Best approach is to get them to change your IP address.

Ragnor
8065 posts

Uber Geek

Trusted

  #773749 2-Mar-2013 22:56
Send private message

Unfortunately this is the typical level of support you can expect from Telstraclear.

Work a saw a similar problem (dhcp denial of service type attack) last year on a business fibre connection with them and they wouldn't do anything to help with cut the problem off upstream.

In the end I think they convinced them to write off the usage after much haggling and threatening to switch to a different provider.

There are plenty of good other good providers for business connections these days, if you have control over the decision don't let poor service like this stand...  Unleash, Vibe, Voyager, DTS, Vocus/Maxnet etc.

TelstraClear
566 posts

Ultimate Geek

Trusted
TelstraClear

  #774175 4-Mar-2013 10:54
Send private message

Hi Scott. Can you please PM me your account number so we can investigate, and a contact name and number as well please? As others have pointed out, it's likely that the solution is to change your IP address.

Cheers, Gary

NonprayingMantis
6434 posts

Uber Geek


  #774177 4-Mar-2013 10:59
Send private message

If the rating of traffic happens before traffic hits your modem (which seems likely), even turning off your modem probably won't make any difference to your usage spike



TelstraClear
566 posts

Ultimate Geek

Trusted
TelstraClear

  #774200 4-Mar-2013 11:30
Send private message

Hi Scott - we think we've found your account and will have a look, however the highest data usage was about 12.7GB a day on 11-Feb and was 2.5GB yesterday. These are total (up plus down). Do you have another account where the usage was 50GB? If so, please can you let me know that account number so we can investigate.

Cheers, Gary

Create new topic





News and reviews »

Belkin Screenforce Tempered Glass Screen Protector and Bumper - Apple Watch
Posted 15-Aug-2022 17:20


Samsung Introducing Galaxy Z Flip4 and Galaxy Z Fold4
Posted 11-Aug-2022 01:00


Samsung Unveils Health Innovations with Galaxy Watch5 and Galaxy Watch5 Pro
Posted 11-Aug-2022 01:00


Google Bringing First Cloud Region to Aotearoa New Zealand
Posted 10-Aug-2022 08:51


ANZ To Move to FIS Modern Banking Platform
Posted 10-Aug-2022 08:28


GoPro Hero10 Black Review
Posted 8-Aug-2022 17:41


Amazon to Acquire iRobot
Posted 6-Aug-2022 11:41


Samsung x LIFE Picture Collection Brings Iconic Moments in History to The Frame
Posted 4-Aug-2022 17:04


Norton Consumer Cyber Safety Pulse Report: Phishing for New Bait on Social Media
Posted 4-Aug-2022 16:50


Microsoft Announces New Solutions for Threat Intelligence and Attack Surface Management
Posted 3-Aug-2022 21:54


Seagate Addresses Hyperscale Workloads with Enterprise-Class Nytro SSDs
Posted 3-Aug-2022 21:50


Visa Launching Eco-friendly Payment Solutions in New Zealand
Posted 3-Aug-2022 21:48


NCR Delivers Services to Run Bank of New Zealand ATM Network
Posted 30-Jul-2022 11:06


New HP Portfolio Supports New Era of Hybrid Work
Posted 28-Jul-2022 17:14


Harman Kardon Launches Citation MultiBeam 1100 Soundbar
Posted 28-Jul-2022 17:10









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.







GoodSync is the easiest file sync and backup for Windows and Mac