[clue-tech] Need a quick IPTABLES line

[Jed S. Baer]

Hi Folks.

Trying to do some stopgap blocking. I'm not a network guru. Here's the
netblock I want to have just be ignored:

inetnum:        77.41.40.0 - 77.41.47.255
netname:        NeoCentel-Home
descr:          BRAS E-320-31 DHCP-pool
descr:          Russian Central Telegraph, Moscow
country:        RU

My approach is to do this:
iptables -t INPUT -A DROP -p all -s 77.41.41.253/255.255.248.0

But I don't understand if that notation will cause the entire block to be
dropped. Input on the -s parameter, or verification that I have it
correct, or how to specify it so it works, much appreciated.

jed