dstiles - 6:59 pm on Jul 2, 2013 (gmt 0)
You could be right but there are several open-port IPs in the random tests I made. Ports I've seen include HTTP/HTTPS, POP3 and SMTP, FTP and others. Those ports say to me server.
If it's a mixed range then tough on the DSL users: they should find a better-split provider. Even if the ranges are static IPs, there is not enough separation between hard-core users who send out bots and "genuine" DSL users.
I dislike and distrust ALL comcast hits but I have to leave them open for one of my customers. In the past 2 years I've logged over 1200 comcast "idiotic hits". On the other hand my customer has received some orders from those ranges. :(