[Declude.JunkMail] IP Range to CIDR Conversion

[Rick Rountree]

Scott (or anyone else who may know),

I'm trying to convert my list of banned IPs from MailShield format for use in JunkMail. MailShield uses a text file with single IPs and IP ranges like this:

61.128.0.0-61.159.255.255
62.4.16.95

I want to convert these to JunkMail format like this:

61.128.0.0/11
62.4.16.95/32

I've used the CIDR/Netmask lookup on dnsstuff.com, but that's slow and tedious. I'm looking for a tool which I can either:

1) paste in the range, i.e., 61.128.0.0-61.159.255.255 and get the CIDR bit output (good)

or

2) If anyone has a JunkMail style file to share which includes all of China's, Korea's, )and other Asian countries that are prone to open relays) assigned IPs (better)

or

3) Read in my MailShield file and spit out a JunkMail style file. (best)

I've also tried several IP convertors I found while Googling but none seem to take an IP range in this form (61.128.0.0-61.159.255.255) as valid input.

So...which one of you folks already know how this can be done so I can stop beating my head up against the wall! <g>

Best regards,

Rick Rountree
Dundee.Net

Go Raiders!


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