Archive for June, 2009:

Logging Access-List hits

Heres a trick on how to log your access-list hits to a syslog server but only log 30 hits at a time.
Lets create our ACL first to log how amny times someone tried to SSH into our Router.
# ip access-list extended NO_SSH
# 10 deny tcp any any eq 22 log
Apply the acl to our vty [...]

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Cisco DHCP Quick Tip

Your boss has informed you that the Windows team will be installing a new DHCP server in vlan 25 that will service vlan 10 but you do not know the IP address yet. What do you do?
Theres something called directed broadcast and this is what you need to enable on your vlan 25 and 10 [...]

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Logging Cisco IOS commands

Ever wondered what that new Cisco Admin was doing on your router? Here’s a quick configuration that will log all commands entered in the Cisco IOS to a syslog server.
# archive
# log config
# logging enable
# notify syslog
Then lets enable syslog logging
# logging host x.x.x.x
There are other commands to the archive command but this should [...]

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