Is there anybody else out there who has had looked at their TCL usage meter over recent weeks and noticed any excessive traffic usage?
I've had a couple of days recently that have large figures that I can't seem to account for.
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The first couple of posts show source port of 80 and dest port of random high port. Odd as usually you see the other way around. Maybe a worm attacking from behind a firewall that restricts everything but port 80 outbound?
the third post shows dest ports of 445, 135, 139 which are all microsoft netowrking ports (conficker worm targets 445 for rpc) and the 1433 which is typically sql server.
i'm not sure how much luck you will have trying to get anything done about it.. you could always ask for a new IP, but that might cause you more problems if you're runnning services.
A lot of tracerts, whois and abuse@isp emails can help sort it out, but that takes time and effort and ISPs often dont really seem to care - especially if you're not their customer.
Sales Engineer
Snowflake
www.snowflake.com
about.me/nzregs
Twitter: @nzregs
They're still flooding in..
I'll take a stab and say all this uninitiated inbound traffic has possibly used somewhere in the region of 5-8GB this month. Time to start some investigation tomorrow!
Unfortunately attempts by ISPs to prevent these sort of attacks from reaching subscribers has typically been met with heavy resistance. The only way to realistically prevent it is to firewall certain ports - e.g. 25, 1433, 445, 135, 139 etc - by default and require subscribers to for them to be opened as an exception.
Sales Engineer
Snowflake
www.snowflake.com
about.me/nzregs
Twitter: @nzregs
Nety: Sbiddle do you have many outward facing service ports open? Have you used Sheilds Up! to see what can be seen from outside your firewall? As long as the h8x0r does not have any luck I would expect them to move on so might not be a permanent thing.
sbiddle: ... and?23 (for a?mail server that requires authentication).
contentsofsignaturemaysettleduringshipping
Just as an update I had my IP address changed on Tuesday afternoon. My total internet traffic usage yesterday was around 150MB downstream which is about what I would have expected. This comapres to an average of 500MB - 800MB per day that was hitting my router last week with similair levels of internet activity at my end.
For 3 weeks now I've been hit by hundreds of MB's per day of uninitiated traffic that I ended up paying for (incl overusage charges since I went over my cap).. Time to ring TCL today and try and at least get them to waive that as it was hardly my problem.
Time to ring TCL today and try and at least get them to waive that as it was hardly my problem.
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