[nycbug-talk] CIDR Network Subtraction Tool?
techneck at goldenpath.org
Tue Jun 16 16:44:47 EDT 2009
Tim A. wrote:
> spamd blacklisting from foreign.txt source file with a list of all
> non-US IP space.
> Occasionally we spark up a new non-US vendor relationship and need to
> receive email from their email servers but their IP addresses have
> been blacklisted in foreign.txt
> Subtract their IPs / ISPs netblock from the /8 entry.
> Currently, I do this by hand. Googling for network calculators spits
> back a ton of tools that calculate subnets but none of which do this
> sort of network subtraction.
> If anyone is aware of such a tool, please share.
Found a python tool called netaddr:
Just FYI, in case it helps anyone else out there.
I was thinking more of a nifty multi-platform (and windows too) GUI
tool, but this gets the job done, amen.
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