Binding IP to Mac

[BrianBSI]

Any help would be good I need to bing A spam infected computer out of a dhcp pool to there ip forever . So I can Null route the ip and that can not get a new ip

 

[KiscoKid]

Don't you just need to update the DHCP pool so that this spammed IP is excluded from that pool of addresses. Then add your Null route to this spammed IP.

Where is the DHCP configured?

 

[BrianBSI]

dhcp is configured on the router . If I exclude the IP from the pool then when the client goes to renew wouldn't they just get a new ip?

 

[KiscoKid]

Yes that's exactly right. You can create a pool on a Cisco devce then specify the excluded addresses. For example:


ip dhcp excluded-address 172.16.1.100 172.16.1.102
ip dhcp excluded-address 172.16.1.124
!
ip dhcp pool 0
network 172.16.1.0 /24
default-router 172.16.1.100
domain-name yourdomain.com
dns-server 172.16.1.101 172.16.2.102

In this example, I've got my usual exclusions setup for stuff like default gateways and DNS servers (172.16.1.100 through to 172.16.1.102) and I've added a new exclusion for the spammed host (172.16.1.124)