Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations Chris Miller on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!

How do I close these open TCP/UDP Ports?

Open TCP/UDP Ports

How do I close these open TCP/UDP Ports?

by  pmkincaid  Posted    (Edited  )
There are various ports that are normally open on a Cisco Router that can be easily turned off to further lock down the router. These ports are as follows:

echo (TCP and UDP) - port 7
chargen (TCP and UDP) - port 19
daytime (TCP only) - port 13
discard (TCP and UDP) - port 9
finger - port 79
bootp - port 67/68

These can be turned off by the commands:
no service tcp-small-servers
no service udp-small-servers
no service finger
no ip bootp server
Register to add this FAQ to your archive
Register to rate this FAQ  : BAD 1 2 3 4 5 6 7 8 9 10 GOOD
Please Note: 1 is Bad, 10 is Good :-)

Part and Inventory Search

Back
Top