Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17


cisco help

Posted on 2006-11-01
Medium Priority
Last Modified: 2010-04-10
what enterface do you set to enable passord protection on telnet sessions?
Question by:zenworksb
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions

Accepted Solution

renill earned 2000 total points
ID: 17855962
its the virtual interface.

#line vty 0 4
#password <password?

Thats It..

LVL 10

Expert Comment

ID: 17855984
do below steps

config terminal

line vty 0 4

password  <password for telnet>


Expert Comment

ID: 17856275
srgilani, you forgot to add in another "login" statement after the "line vty 0 4" statement. By adding this "login" statement, the router/switch should able to prompt for password when you telnet.

If you want to add the username and password togather for login, you should add another statement username xxx password xxxx.

LVL 11

Expert Comment

ID: 17863965
a complete protection would be to also add a access-list so that telnet access is allowed from specific IPs only.

(config)# access-list 50 remark Protect telnet access
(config)# access-list 50 permit host <ip addr>
(config)# line vty 0 4
(config-line)# password <password>
(config-line)# login
(config-line)# access-class 50 in

or, instead of specifying a host, you can specify a range of ips:

(config)# access-list 50 remark Protect telnet access
(config)# access-list 50 permit <ipAddr> <wildcardMask>

Note that wildcardMask is not the same as subnet mask. Here is how to get it
Say for example that the subnet mask is

256 - 240 = 16
16 - 1 = 15
Replace all 255 with 0

The wildcard mask is


Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Short answer to this question: there is no effective WiFi manager in iOS devices as seen in Windows WiFi or Macbook OSx WiFi management, but this article will try and provide some amicable solutions to better suite your needs.
For many of us, the  holiday season kindles the natural urge to give back to our friends, family members and communities. While it's easy for friends to notice the impact of such deeds, understanding the contributions of businesses and enterprises i…
Internet Business Fax to Email Made Easy - With  eFax Corporate (, you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question