Wilcard mask and subnets

[enikk]

if i have a network id of 231.20.116.0 /22 and want to block just this particular network what would my wildcard mask look like in an access list? Would it be 0.0.0.255 or 0.0.3.255?

thanks

Tony

[lgijssel]

It should be 0.0.3.255.

With 0.0.0.255 you are only catching network 231.20.116.0/24 and network IP range is from 231.20.116.0 till 231.20.119.255.

[enikk]

thanks!

[vincent-n]

Go to www.boson.com and download the free utility tool from this site. One of the tool is a subnet mask/wild card mask calculator. Pretty good stuff.