Re: tool to search within cidr blocks

[Grant Taylor <gtaylor@riverviewtech.net>]

On 10/22/2008 2:28 PM, Joey wrote:
> I have several ranges of IP’s being put into iptables.
> The IP ranges look like this:
> 62.29.0.0/17
> 62.68.192.0/19
> 62.108.64.0/19
> 62.244.192.0/18
> 62.248.0.0/17
> 77.67.128.0/17
> 77.72.184.0/21
> 77.73.216.0/21
> 77.75.32.0/21
> 77.75.216.0/21
> 77.79.64.0/18
> 77.92.0.0/19
> 77.92.96.0/19
> 77.92.128.0/19
> 77.223.128.0/19
> 77.245.144.0/20
> 78.40.224.0/21
> 78.111.96.0/20
> 78.135.0.0/17
> 
> I am blocking a specific IP from the firewall as logged in messages 
> 71.74.56.125. 
> In looking at each block of ip’s and using a CIDR calculator I can’t figure 
> out what range it’s really coming from.  The list I have is pretty huge. 
> Is there a tool or a way to ask iptables what rule it matches?  Based on all 
> my calculations I don’t have anything declared that would block that IP.
> 
> Thanks!

Um, 71.74.56.125 is not part of any of the Class A ranges that you are 
blocking (62., 77., 78.).  So... that sort of implies that something 
else is blocking it.

Do you care to provide the (sanitized) output of an 'iptables-save' for 
us to look at?



Grant. . . .