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block an ip for destination port cisco

Posted on 2013-05-09
Last Modified: 2013-05-10
How should we block an internal ip address to connect to a specific remote port.
for ex our ip address is xx.xx.xx.xx and i want to drop its 22 port calls to out of our network how should i do it ?
Question by:3XLcom
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LVL 11

Expert Comment

ID: 39154039
This would be one way:

interface ethernet 0/0
 ip access-group 120 in

access-list 120 deny tcp host xx.xx.xx.xx any eq 22 log
access-list 120 deny udp host xx.xx.xx.xx any eq 22 log
access-list 120 permit tcp any any
access-list 120 permit udp any any

Author Comment

ID: 39154045
is this work on outputs ? I am not asking for input calls ?
LVL 11

Expert Comment

ID: 39154080
in to the interface is out from the PC
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Author Comment

ID: 39154857
hmm i see so i wont put it to uplink port i will put rules to switch port of pc ? because on uplink it is on out direction
LVL 11

Accepted Solution

naderz earned 500 total points
ID: 39156159
Yes. Best practice is to apply this type of policy closest to the source. The concept being you don't want the "unwanted" traffic to travel through the network any more than necessary.

Author Closing Comment

ID: 39156171
Thank you so much

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