RE: Cisco Telnet Service

[<RRoberts () regionalhealth com>]

Muhammad,

If I'm understanding you correctly, you have enabled SSH v2 and you're wondering why you're still able to telnet to the 
device after having removed the configuration from the VTYs.  You need that configuration on your VTYs, but you also 
need to specify the transport layer protocols allowed.

Try this to deny everything except ssh;

line vty 0 4
 transport input telnet ssh
 transport output telnet ssh
line vty 5 15
 transport input telnet ssh
 transport output telnet ssh

Hope this helps.

//rr

Your network connectivity issues are most likely caused by TIME-WAIT state assassination due to an inadequate ephemeral 
port selection algorithm.

-----Original Message-----
From: listbounce () securityfocus com [mailto:listbounce () securityfocus com] On Behalf Of Muhammad Hafiz Rafek
Sent: Monday, January 24, 2011 5:00 PM
To: Mohamed Farid
Cc: security-basics () securityfocus com
Subject: Re: Cisco Telnet Service

Yes.. I'm able to telnet and login to the switch

On 1/25/11 4:57 AM, Mohamed Farid wrote:
> Are you able to telnet and to login ?
>
>
> On 1/24/11, Muhammad Hafiz Rafek<hafiz () cybersecurity my>  wrote:
> > Hi all,
> >
> > I already remove some config at the switch (10.5.1.100) for telnet
> > service and enable the ssh v2
> > what i do is
> >
> > Switch#conf t
> > Switch(config)#line vty 0 4
> > Switch(config-line)#no password
> > Switch(config-line)#no login authentication
> >
> > When i see at the show run, there is now more line vty 0 4 or line vty 5
> > 15. Only have line console 0
> >
> > my question is why i still can telnet to that switch (10.5.1.100),
> > If there have any miss out the config
> >
> > Thank you
> >
> > --
> > Muhammad Hafiz Bin Rafek
> > Analyst, Network and Security Team
> > Secure IT Services Department
> > Cyber Responsive Services
> > CyberSecurity Malaysia (An Agency Under MOSTI)
> > DL      : +603 8992 6963
> > Fax     : +603 8945 3205
> > HP      : +601 9224 1621
> > Website : http://www.cybersecurity.my
> >
> >
> >
> >
> > Disclaimer:
> >
> > "This email (and any attachment to it) is confidential and intended solely
> > for the use of the individual or entity to whom it is addressed.
> > CyberSecurity Malaysia assumes no liability whatsoever for the content of
> > this email or for the consequences of actions taken based on such content
> > unless it is subsequently confirmed in writing. Unintended recipients are
> > notified that disclosing, copying or distributing of this email, or acting
> > based on its contents, is strictly prohibited; and you are to immediately
> > and permanently delete or destroy this email and notify the sender
> > forthwith.
> >
> >
> > ------------------------------------------------------------------------
> > Securing Apache Web Server with thawte Digital Certificate
> > In this guide we examine the importance of Apache-SSL and who needs an SSL
> > certificate.  We look at how SSL works, how it benefits your company and how
> > your customers can tell if a site is secure. You will find out how to test,
> > purchase, install and use a thawte Digital Certificate on your Apache web
> > server. Throughout, best practices for set-up are highlighted to help you
> > ensure efficient ongoing management of your encryption keys and digital
> > certificates.
> >
> > http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
> > ------------------------------------------------------------------------

--
Muhammad Hafiz Bin Rafek
Analyst, Network and Security Team
Secure IT Services Department
Cyber Responsive Services
CyberSecurity Malaysia (An Agency Under MOSTI)
DL      : +603 8992 6963
Fax     : +603 8945 3205
HP      : +601 9224 1621
Website : http://www.cybersecurity.my




Disclaimer:

"This email (and any attachment to it) is confidential and intended solely for the use of the individual or entity to 
whom it is addressed. CyberSecurity Malaysia assumes no liability whatsoever for the content of this email or for the 
consequences of actions taken based on such content unless it is subsequently confirmed in writing. Unintended 
recipients are notified that disclosing, copying or distributing of this email, or acting based on its contents, is 
strictly prohibited; and you are to immediately and permanently delete or destroy this email and notify the sender 
forthwith.


------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
------------------------------------------------------------------------




Regional Health's mission is to provide and support health care excellence in partnership with the communities we serve.

Note: The information contained in this message, including any attachments, may be privileged, confidential, or 
protected from disclosure under state or federal laws . If the reader of this message is not the intended recipient, or 
an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that 
any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this 
communication in error, please notify the Sender immediately by a "reply to sender only" message and destroy all 
electronic or paper copies of the communication, including any attachments.

------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
------------------------------------------------------------------------