A reader wrote in reporting seeing a large amount odd activity from three subnets across a large number of disparate networks he managed. Addresses from these subnets have been generating between 100,000 - 500,000 inbound connections a day apiece, primarily targeting port 80 however, he had also seen a very small amount of inbound port 25 and port 443 as well. Sadly he wasn't able to capture any packets.
The Subnets in question are:
5.254.116.32-5.254.116.63 ("AppLayer_Anti-DDoS_Hosting" located in Russia)
94.23.97.196-94.23.97.199 ("GAMESPROTECT AntiDDoS Network" located in Germany)
5.254.105.16-5.254.105.31 ("WooServers" located in Germany)
If you have any packet captures of this traffic or know why theses subnets are making apparently unsolicited, random connections, please write in and let us know!
Chris Mohan --- Internet Storm Center Handler on Duty
(c) SANS Internet Storm Center. http://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
Source: http://isc.sans.edu/diary.html?storyid=17552&rss