Help creating a DNS subnet

[GaryK]

Can someone please help me create a DNS subnet for 70.99.70.0 thru 70.99.70.255?

One of my servers is getting slammed by IP Addresses in this range and I need to add it to an IPSec filter. Adding each one individually is turning into a full-time job.

Thanks.

[lammert]

This is 70.99.70.0/24 or 70.99.70.0 netmask 255.255.255.0, depending on the notation your IPSec filter uses.

[GaryK]

It uses the later notation. Thank you very much for such a quick reply. I'll sleep lots better tonight.