A discussion forum of one of Redpill Linpro‘s customers has been under attack lately, through a number of DoS and DDoS variants. Today’s attack strain was of the rather interesting kind, as one of its very distinctive identifiers was a suspicious, not to say ridiculous, amount of IP addresses in the incoming X-Forwarded-For HTTP header. […]
Since yesterday I’ve registered a significant increase in probes for TCP port 7547. Over the last 12 hours, more than 1000 different IP addresses have tried to contact one of my networks. 1000 probes is of course no big deal, but the port that’s suddenly become of interest can be. The image below shows the […]
Did you ever wonder where your network traffic goes (and originates from)? With the SiLK suite and optionally some JavaScript map classes it’s quite easy to find out. SiLK is a tool quite equal to Cisco‘s NetFlow, and SiLK does indeed accept NetFlow output from a router. Just like NetFlow tools, SiLK stores network traffic […]
For my own and possibly others’ reference, these are quick notes on how to use GeoIP data from MaxMind in their new split file formats. Older tutorials describe using the GeoIP data from a time when they were one file, it seems now MaxMind have split into two files. The files are split into Location […]