APNIC doesn't give CIDR format? doh
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So I've been busily firewalling off entire networks found to be remotely probing RDP, SSH, Radmin, SQL, etc that I see appearing in the logs, mainly just to drop them so I can see other more important things that may be blocked in the logs.
Unfortunately some of the big global registries don't report ranges in CIDR format.
http://www.apnic.net/
Whois Search: 183.60.159.20
The range is "183.0.0.0 - 183.63.255.255"
What CIDR is that, and how do I figure that out?
Is there an easy calculator somewhere where I can just drop in the start and end addresses, and it spits out the netmask?
.
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Country IP Blocks is what I use with pfBlocker:
IP Address assigned to: CHINA
IP Address: 183.60.159.20 is located within the following Network:
Network: 183.0.0.0
CIDR: 183.0.0.0/10
Mask: 183.0.0.0/255.192.0.0
Network Range: 183.0.0.0 - 183.63.255.255
Total addresses: 4,194,304 -
You can enter an IP range into the alias field for a network alias and it will calculate the appropriate CIDR format address.
