Is it possible to completely disable port 23 on a Cisco device?

When we run the command 'show the ports-open-plan control host' on any of our routers (but more precisely a CGR 2010) we are witnessing port 23 in a listening state.

Active internet connections (servers and established)
State of Service Local prot address foreign address
tcp                        *:22                         *:0                                    SSH-Server LISTENING
tcp                        *:23                         *:0                                              Telnet LISTEN
udp                       *:123                       *:0                                                LISTEN TO NTP

Our listeners are wary of even if we have shown that we do not have telnet activated on VTY lines only SSH, and there is an ACL in place for extra protection. Is it possible to completely disable port 23 to prevent it from running at ALL on startup? I have scoured the internet for a solution to this and have developed dry. I think there must be a way to do this, but he can't know. Is it possible to do it at all? And if not I would really like to find official documentation from Cisco, indicating that ports are by default and cannot be disabled so that I have something to give our listeners.

Thank you!

You cannot stop the telnet service completely on a router IOS, including the CGR 2010. This can be done on NX - OS ('no telnet service').

As Leo points out and as you mentioned that you are already doing, secure the vty lines is considered a good practice. You could also add font control plan. I saw that configuration to NERC audits used in nuclear power plants here in the United States.

As far as something if official Cisco, you open a TAC case or work with your dealer to get something of the business unit.

Tags: Cisco Security

Similar Questions

  • Is it possible to completely disable tabs (remove all tab options menu) for firefox 10?

    Is it possible to completely disable tabs (remove all tab options menu) for firefox 10. I hate the tabs and the recent changes made to the incorrect selection of menus are "open in a new tab" when what I want is "open in a new window" a common and unwelcome occurrence.

    You can hide menu items and move up / down in the menu with the Menu Editor extension.

    https://addons.Mozilla.org/en-us/Firefox/addon/710

  • It is possible to completely disable the Junk filtered by IMAP in WLM?

    WLM is too active and is entering of incoming emails quite normal and throw them into the junk e-mail folder.  Whether accounts Gmail or random areas, it is a problem because I am trying to use WLM to manage my work email addresses.  Is there anyway to turn off completely this too active 'functionality '?  I connect to my domain via IMAP address.

    It's really become a nusense since I have to pay attention to my Junk folder to see if important emails are to be mislabeled.  And no, whitelist these addresses is not an option because it allows only existing communication.

    I turned to Phishing, and I set the junk filter to "No filtering"... to the zero effect.  Is that what I can do or should I scrap WLM?

    Hi Toasty_S,
     
    I recommend you post your query in Windows Live Messenger Forums for assistance with this issue.
  • Is it possible to completely disable the backup Rescue and Recovery?



  • How do I completely disable the library?

    Hey there, is it possible to completely disable this library? I don't want it. for example every time that I create a color in illustrator, there is a library created with this color. I don't need this. and I can't find a checkbox in the preferences for this cut for all cloud applications.

    any advice?

    see you soon,

    Christian

    There is a checkbox when you create color swatch: "add to my library".

    Just turn it off.

  • 4 usb ports - this device is disabled because the firmware of the device did not give him the necessary resources. (Code 29)

    m facing a problem with hub 4 ports usb of my... When I connect usb hub my with my usb keyboard and mouse, and then the lights of the suite to get devices but they doesnot work... and the error message shows... I checked in Device Manager and I got the message details which are given below.

    Device status:

    This device is disabled because the firmware of the device did not give him the necessary resources. (Code 29)

    driver version:

    6.1.7601.17514

    Please help me... Thank you.

    Hello

    In the Device Manager - right click on the device and Uninstall - when complete reboot.

    Check in the Device Manager to see if the device re-installed. If it isn't action - Scan for
    hardware changes.

    Also check the BIOS - Setup/settings - often F2 for system start - make sure that the USB port
    is activated. Check with Support from the manufacturer of the system/motherboard, their documentation online.
    and ask in their forums.

    How to fix error Code 29
    http://pcsupport.about.com/od/errorc/a/code-29-error.htm

    I hope this helps.

    Rob Brown - Microsoft MVP<- profile="" -="" windows="" expert="" -="" consumer="" :="" bicycle="" -="" mark="" twain="" said="" it="">

  • Completely disable the presentation of data

    Hello

    I set the following preferences:

    user_pref ("datareporting.healthreport.service.enabled", false);
    user_pref ("datareporting.healthreport.uploadEnabled", false);
    user_pref ("datareporting.policy.dataSubmissionEnabled", false);
    user_pref ("toolkit.telemetry.unified", false);

    Yet, Firefox 40.0.2 has created a new folder "datareporting" in my profile folder and continues to add new elements to it.
    How can I completely disable Data Reporting?

    Thank you.

    https://Bugzilla.Mozilla.org/show_bug.cgi?id=1195552#C4

  • How can I completely disable private browsing

    I would like to know how to completely disable incognito at least preference to withdraw all my Apple devices.

    No, you cannot remove it from Safari on ANY iOS device. If you do not turn it on in the browser, it does nothing. It's as good as it gets. You can try a third part of the browser, but frankly most of any decent browser will include this feature in one form or another.

  • Firefox refuses to stop the blocking of pop-up windows - up, even with added exceptions and blocker completely disabled.

    I work in a facility that uses a corporate intranet to access our database. The database uses windows pop up widely important information. Problem is that Firefox absolutely will NOT stop block popup windows no matter what I try. At first I added our database server to the list of exceptions. It worked for a while, but soon after resumption of the important pop-up blocking. I then completely disabled the blocking of popup windows (options > > content > > unchecked "block popup windows"). It did not work until I closed and reopened Firefox. A week later (today!), Firefox takes over again blocking the pop-up windows. I double checked my settings to confirm that Firefox still claims to have the popup blocker off.
    At this point, I am at a loss on how to proceed. I looked at other issues similar and my frustration (and certainly their even more), individuals requesting repeatedly told them to turn off the blocker of popups even after explaining that they already have. Help would be very appreciated.

    Thanks for the description of the Firefox Safe Mode. I just thought that Safe Mode is a condition under which we could launch Windows XP in a minimal operating system by starting a startup sequence, hold down the F8 key and effectively manage the prrams troubleshooting and maintenance for Windows. It seems that the Windows XP of Firefox version could run not affected by a virus, a worm or other malware, and ge fixed.

    Please try this Linux distribution. They are many, and I'm a fan.

  • Completely disable the page "this plugin is vulnerable and needs to be updated".

    Is there a way to completely disable this check, or allow a comprehensive package for all Web sites?

    I am aware that I can add individual sites by clicking on the icon in the address bar and saying to always load the plugins for this particular site, however for the project specific I'm firefox configuration for this is unfortunately not an option - if I can not disable this option, I will need to address other browser options that would be an incredible pain as from now the installation is perfect at this point.

    I had a quick glance in the subject: permissions page and the only option he plugins is 'Allow' or 'always ask '. I have this kit to allow but clearly that the warning above is not affected hereby.

    You can enable or disable the preference described here: http://kb.mozillazine.org/Extensions.blocklist.enabled (the article is a bit outdated - blocking is now not only used for malicious extensions but also to disable the vulnerable plugins & crashy graphics drivers).

  • Re: Is it possible to completely recover VistaOS using only the recovery DVDs?

    Hidden WinRE partition has been deleted by mistake, but I still have the original recovery DVD for my A200.
    Is it possible to completely recover VistaOS without the WinRE partition, using only the recovery DVDs?

    Of course.
    The Toshiba Recovery CD is designed to recover the laptop.
    Using the recovery CD you will get factory settings.

    But note; the Toshiba Recovery CD format the whole HARD drive and erases the HARD drive partitions.

    Welcome them

  • Is it possible to use the port replicator with the Satellite Pro series?

    Hello
    Is it possible to use the port replicator (Docking Stations) for Tecra series laptop with the Satellite Pro series?

    Hello

    No, as far as I know it of not possible to use a port on laptops Satellite Pro Replicator.
    All laptops that support the Port Replicator has a port extension at the bottom of the unit.
    To my knowledge, the Satellite Pro series don t have this port.
    For now only the Tecra and some units Protégé(ie: S100) supports this feature.

  • How do I completely disable the vibration?

    Whenever I get a message, the phone vibrates, cannot find an option to completely disable the vibration.

    You have to go in some applications individually. E-mail and SMS applications have their own notifications parameters including vibrate.

  • Impossible to completely disable a command grayed out button

    Hello! Everyone,

    I thought that this matter has been resolved before, but it back once again.

    Please take a look at the code in the attached draft.

    If the call to "Delay (5)" is placed after "ProcessSystemEvents()" called in the A_Callback() function, B - LEDs always do anything!

    Shading or make invisible B button is not disable the command button at all.

    Only when I placed the call "Delay (5) ' before the 'ProcessSystemEvents()', the B button will be disabled.

    Just by dimming button B, without "ProcessDrawEvents()" and "ProcessSystemEvents()", will not ensure that the button is disabled.

    I'm puzzled.  What is the proper way to completely disable a command button?

    This problem occurs only in 6.0 CVI?

    If you need to call ProcessSystemEvents in order to ignore clicks on a button depends on what you are doing at the time when and where you you undim control.  The original question came when the button is gray and more blurred in a callback.

    CVI differs from event processing while you're in a callback.  If you're not currently in a reminder, a click event will be processed when it occurs.  If the control is dimmed when the click occurs, (once again, outside of a reminder), the event will be treated and ignored and you need not ProcessSystemEvents.

    Or if you dim the control from a reminder, click the control, and then quit the recall without undimming the control, the event will be handled with the dimmed control and will be ignored (without the need of ProcessSystemEvents).

    So the big question is when you undim control?  If you the undim the end of a long reminder, then you call ProcessSystemEvents.

    But if, for example, you open a panel with a dimmed and then control it undim after something else, you don't need ProcessSystemEvents to ignore the click.

    Let's say you have a panel with a control for the user to select a file name and a button to print the selected file.  You don't want to print to be active until the file is selected, so it is dimmed by default initially.  In a callback for file name control, after the user selects a file, you can then undim the print button without the need to call ProcessSystemEvents.  Any click button print previously sifted is already been ignored.

  • I want to completely disable the Windows Magnifier. How do I do that?

    I want to completely disable the Windows Magnifier. How do I do that?

    See this thread.
    http://social.answers.Microsoft.com/forums/en-us/w7desktop/thread/409861dd-c0c5-4D64-AAEC-fb42f23647b7 Bruce Hagen MS - MVP [Mail]

Maybe you are looking for