Telnet to port specific vty
I know that it is possible to reverse-telnet on a specific serial port on some routers by telnet to a specific tcp port. For example:
reverse-Telnet for Interface Async 5 with a TTY, 5 row identifier would you telnet to the local IP address of router to port 2005
I would like to have the same capacity with vty ports.
I have a router that uses Cisco Lock-key authentication and to add a dynamic access list entries to any host ip that connects to port vty 0. I also want the ability to connect on the router itself in order to establish an EXEC session. To do this, currently I have to open a second telnet session before the vty 0 ends.
To make a long story short, here's how I would want it to work.
move the lock and key of port vty authentication 4
Telnet to
generic telnet to
Is this feasible? If Yes, please provide an example of configuration and/or instructions. Thank you. In fact, you can configure the vty as a rotating group. line vty 4 transport of entry all rotating 4 You can telnet to the router on port 3004. 23 is also open to if, but you can use a class access to restrict the use to vty 4 if necessary. Or by using the (dirtier) NAT: IP nat inside source static tcp 172.16.55.1 23 172.16.55.1 2002 extensible interface Ethernet0 IP 172.16.55.1 255.255.255.0 interface... the IP 10.0.0.1 255.255.255.0 NAT outside IP Tags: Cisco Security Hello is it possible to connect telnet to specific vty line. line vty 0 3 Cisco password ! line vty 4 password 123 If so, how. Thanks in advance Joe There is no way the telnet connection to the router to a port specific direct vty. vty ports will be selected according to availability. I would like to know what is the purpose behind that so that we can think in a certain way. The code of unknown 43 for a port specific device on my computer laptop no matter what I plug into it, printer, USB key, etc. Hi Jack, Script agent - monitoring telnet to a specific port connection I created this script agent as described below. Although when I deploy and create agent, I don't see an agent created on the dashboard of the Agents, or the data browser. Any other suggestions? Recommendations to improve extensibility? Also, if I have several hostnames and several ports, what is the best way to implement who? OMNI_PortMonitor.sh echo OMNI_PORT_HLPOM560_20301 TABLE echo START_SAMPLE_PERIOD HTTPSERVERIP = "hlpom560.someDomain.com". echo HTTP_SERVER_HOSTNAME. String = $HTTPSERVERIP HTTPSERVERPORT = "20301. echo $HTTPSERVERPORT = HTTP_PORT TELNET = $(which telnet) ( echo "exit". ) | $TELNET $HTTPSERVERIP $HTTPSERVERPORT | connected grep > / dev/null 2 > & 1 If ["$?"-not "1"]; then echo PORT_STATUS = 0 on the other echo PORT_STATUS = 1: FI echo END_SAMPLE_PERIOD echo END_TABLE Thank you #AJ Hi AJ,. The best practice is to design your script so that it checks for the environment variables populated by a secondary ASP. If these environment variables are not defined, the script can set values of relief. I know that you have used the custom ApacheStatus agent. The collector for this agent, ApacheStatus.sh script, check the variables of environment generated by ASP. If they are not present, the script hard code a list of values. This allows the script to execute and generate data of interest from a list of servers Apache targets from the command line. You can modify your script to do the same. Kind regards Brian Wheeldon Operational status SCCP bring up is successful. message not sent to port or VTY sessions to THE Hello On a Cisco IOS router, when the command of the CSPC is configured, the following message is sent to the console port: Operational status SCCP bring up is successful However, this message is not sent to telnet or ssh sessions through VTYs, or ports in the Is this a bug? I tested it on: 2821 router running IOS Version 12.4 (24) T6 with function ADVENTERPRISEK9 defined 2801 router running IOS Version 12.4 (24) T6 with function SPSERVICESK9 defined 2801 router running IOS Version 12.4 (24) T6 with function ADVENTERPRISEK9 defined 2921 router running IOS Version 15.2 (3) T 2851 router running IOS Version 12.4 (24) T6 with function ADVENTERPRISEK9 defined Gateway analog voice VG224 running IOS Version 15.1 (3) T1 Router 7206VXR with NPE - 400, running IOS Version 15.1 (4) M4 with the ADVENTERPRISEK9 option I'd say it's a (minor) bug. An IOS programmer SHOULD have sent the message to the logging engine, but sometimes a programmers could write a message directly to the console for internal diagnostics during development, even if it is not the best practice. They should remove this message before sending the code, or make a call suitable for the engine of logging to announce the event through standard logging mechanisms. Please engage the TAC in order to get a bug filed. Telnet Monitoring port in Foglight Hi all At present I'm migrate all servers linux monitoring Nagios to Foglight and comparing Nagios check Foglight Infrastructure cartridge, I found that there is no verification of telnet port. Y at - it a cartridge that will take care of this type of surveillance or I need to write custom Foglight cartridge? Thank you Shashank Soni. Foglight doesn't do this out of the box, but it can be configured. Check out these two positions: one and two. That said, I hope that you check that the telnet port is not open. No one should use telnet these days, it isn't safe. Use ssh. Jeff PIX 515E and Telnet to port 25 When I telnet (in or out) on a mail server (using port 25) the answer is: 220-******************* and all orders come back as "invalid command." When I put the old (no - pix) firewall, this does not happen (the responses are complete and commands work fine.) A lot of email is coming and going, but some mail servers cannot send email. This is common for misconfiguration and where should I look? Thank you Mark Delete the fixup protocol smtp 25! command to run: No fixup not protocol smtp Details about this: The order fixup protocol smtp active the function of guard of mail, which allows only mail servers receive the RFC 821, section 4.5.1 of the orders of HELO, MAIL, RCPT, DATA, RSET, NOOP, and QUIT. All other commands are translated into x which are refused by the internal server. The result is a message such as "500 unknown command: 'XXX'.» Incomplete orders are ignored. Note during a SMTP session interactive, different SMTP security rules may reject or hang with your Telnet session. These rules include the following: SMTP commands must be at least four characters; must end with the return cart and jump; of line and must wait for a response before issuing the next reply. From PIX Firewall software Version 5.1 and higher, the fixup protocol smtp command changes the characters of the SMTP banner asterisks except for the "2", "0", "0" characters. Return (CR) and linefeed (LF) characters are ignored. PIX Firewall software Version 4.4, all the characters in the SMTP banner are converted to asterisks. Reference: sincerely Patrick Several ports to listen for SSH on Catalyst switches Hello community, On Cisco routers, you can set up multiple SSH ports (instead of the default tcp 22) in combination with rotary groups. Then attach these rotating groups of specific VTY lines. It works very well. But it seems on Cisco switches, you cannot set different ports of SSH. The order Router(config) #ip ssh port portnum Rotary group is not available. You can use the rotating on the VTY lines, but it does for Telnet connections. Did someone knows if it is possible to use rotating groups on switches with SSH? What I'm trying to achieve is, I want to use multiple lists of AAA method and define these specific VTY lines slot. In this way, I am able to designate specific users, connecting from specific IP on a dedicated VTY line addresses, with a personalized list of AAA method. Any help is very appreciated! Kind regards Dion Dohmen Hello I am currently using 12.2 (58) SE2 on the 3560. Software Cisco IOS, C3560 Software (C3560-IPSERVICESK9-M), Version 12.2 (58) SE2, RELEASE SOFTWARE (fc1) I lowered my IOS to check if she is still supported for the 3560 on 12.2 (55) SE1 and is not. XXX availability is 1 minute XXX (config) #ip ssh? XXX (config) #ip ssh I then upgraded to 12.2 (55) SE9 and there is still not supported. XXX availability is 1 minute XXX (config) #ip ssh? XXX (config) #ip ssh I would recommend that you upgrade, but I unfortunately don't see any point. Thank you Nehmaan Hello, the console of the router cisco 911 session does not appear in the PuTTY emulator, but the same console cable does not work with the cisco switch.what could be the problem? I can telnet but its saying ' no password set "Please, have a solution to this? Try a different bitrate 115200 but if same configurations working in the port of the switch could be dead, comes to the telnet port of vty, did you set ssh access on it at all? Hello everyone, We have thought a lot about this problem for days without a solution. We would like to restrict ssh access from a specific to a particular vty source IP address. We'll tell whenever source A with IP X.X.X.X connects it will be redirected to vty 5. Even if vty 0 to 4 are free. We tried to solve this problem by using access lists. by denying A host on vty all except vty 5. But it did not work. The configuration looks like this: access-list 10 deny X.X.X.X access-list 10 permit Y.Y.Y.Y ACCESS-list 11 permit X.X.X.X access-list 11 allow Y.Y.Y.Y line vty 0 4 access-class 10 line vty 5 ACCESSS-class 11 in Thanks adavance. Other ideas are welcome. PS: Curiously it worked in Packet trace The VTY port is chosen at random, so I think it would work sometimes and sometimes it won't. To make this work correctly I suggest using rotating groups. In this way, you can attach a specific to a specific VTY line port: I hope this helps! Thank you for evaluating useful messages! LAN/WAN ports not supposed to be Gigabit? Capped at 250Mbps, NOT because of the ISP LAN devices. Hi all Have a bit of a problem here. I have Internet Fiber-to-the-home (FTTH) with Bell Canada and have their Fibe Gigabit service which is 940/120 speeds up and down, respectively. I was able to bypass his combo modem/router using a switch connected to the optical network terminal (HAVE) where the fiber cable enters the House (which serves mainly my base modem) and using custom settings of VLAN and DNS in ports specific for my fiber IPTV service Bell and receivers work together through my router. So, I have a few routers that I tried this with to try to solve my problem. My Asus RT-AC5300 and others have no problem with having me my subscribed speed - certainly through devices connected to gigabit LAN and also via WiFi on compatible devices. But I'm not concerned about WiFi - it is specifically wired ethernet devices that are the cause. I use CAT5e and CAT6 cables only because he is a Gigabit connection. The issue I have with my Time Capsule (3 to, latest model AC) is that, literally, speeds for gigabit wired devices will not exceed 250Mbps downstream. Download speeds can hit 125Mbps without problem. Why is this? Is there something my Time Capsule prevents leave the LAN ports operating at gigabit full transfer speed? It is not only a device - I have multiple gigabit devices I tested, on all three of the TC ports, and none of them exceed 250Mbps. Yet when I connect them to another router gigabit, such as the Asus I've described but also others, they have no problem hitting 900 + Mbps downstream on the exact same network configuration and Setup at home. Thanks for any ideas, comments or suggestions. Y at - it a setting I have accidentally enabled that is the cause? I had much rather use the TC of the most convenient airport for my network I was planning on getting multiple Airport extreme to position around the House to cover literally home WiFi and LAN bridges through the simple installation of these devices, but I do if I can't use my fiber subscribed speed. OR maybe I have a defective unit. Thanks again for the help! See you soon The issue I have with my Time Capsule (3 to, latest model AC) is that, literally, speeds for gigabit wired devices will not exceed 250Mbps downstream. Download speeds can hit 125Mbps without problem. Why is this? Apple AirPort routers have been designed to work with the cable standard and DSL connections. The fiber is the new ball game, and Apple knows yet how to play the game, let alone to understand the rules. Most of the problems associated with connections to high speed on airports is a result of the decision of Apple to eliminate any kind of manual settings to manually adjust the speed of the WAN port on the router... and are based rather on an "Auto" setting. Automatic adjustment seems to work pretty well on the fiber up to approximately 100 Mbps connections, but the WAN port is struggling to negotiate with high-speed connections when it is connected directly to the fiber. LAN ports can also be affected. Some users have reported that insert a Gigabit switch between the connection of the fiber and the Time Capsule or AirPort Extreme has helped with speeds. The theory here is that the switch can negotiate with the fiber connection much better than the WAN port on the Apple device. If you have a handy Gigabit Ethernet switch, that it could not hurt to try this "Workaround". Other users report no benefit when they try it. Yet when I connect them to another router gigabit, such as the Asus I've described but also others, they have no problem hitting 900 + Mbps downstream on the exact same network configuration and Setup at home. The time Capsule is not directly connected to the fiber connection, so it OK to talk and negotiate with what he sees as a 'normal' a conventional router connection.
Don't forget also that the 802.11ac products were designed before 2013. Current products have not changed since their introduction in June 2013. The bottom line... Apple needs to decide whether it wants to be an actor, or leave the routing other players company established. Such what, Apple is far behind the curve... my opinion. While it might not hurt to take the time Capsule to an Apple Store to check over the machine, you might want to ensure that they have in fact a fiber connection high speed to test. setting the parameters of serial port VISA does not persist When I set the baud rate using the VISA's Interactive Control Panel for a serial port specific (ASRL) and then close the window for ASRL, baud rate goes back to the default value. Why doesn't baud rate? Also when I change the port settings for a particular serial port (COM) on the side of Windows, why can't I see these same port settings when I look at them from the interactive panel of VISA? Also, when I set by programming the output baud rate for a particular ASRL (code C), why is it reset by default when I re - run my program and do a get on baud rate? Some information: My C program works on an industrial PC which has a PXI MXI connected to it expansion chassis. Series 3 cards in the expansion chassis. When you close the VISA session and/or close your application, port settings in the system default values. It is a very normal behavior. As long as you keep your open VISA session, the port will behave how you already told (set Baud Rate, etc.). Change the scope to the server telnet on vista home? How can I change the scope for the Telnet Server on the local subnet only in Vista Home Premium? I have two photos, it shows what I'm trying to replicate on XP Professional, the other shows my problem that I can not understand how more open port 23 for everyone. By clicking on the "Advanced" tab won't let me change anything either. I am logged as administrator on my own machine, but I have to be able to set up on the computer of someone else. I use my own to learn, since I created my machine as a home for Vista/Windows 7 dual pro. BTW, the icon of autocratic updates is because I did not start VIsta in some time. http://www.Flickr.com/photos/10736018@N05/sets/72157629201945937/ Basically, I want to limit the scope for applications of telnet entering 192.168.1.0/24 subnet only IP addresses. Any other IP address should be removed by the firewall. I can't find a way to change things by using the built-in options. I disable the integrated thing and try to make my own? Outgoing requests to telnet on port 23 must be unrestricted. I think he should focus on inbound and outbound rules rather than firewall traffic rules. There is a tab on the properties. Hi, I can't find this info anywhere. I knew that the W510 have 4 port USB. 2 USB 3.0, 1USB 2.0 and 1 Combo Harbour. Where are those port specifically? You have two ports USB 3.0 on the left side of the computer near the front and they are blue. You have the combo USB/eSATA to the right left of the firewire port and USB 3.0 ports. The last USB is on the back so so turn around the computer and look at the back, it should be on the left side and it is yellow. -gan Vista Firewall blocks port 135, 445 of VPN connection Desktop computer is Vista x 64 Enterprise. I can access other computers at the office without any problem of file sharing. I am connected to the Home Office via VPN and I couldn't access the file sharing from my computer at home. After having turned off the firewall on the desktop computer, I was able to access file sharing. I found when the firewall is turned on, I can not telnet to port 135, 445 of my home computer, but I cannot telnet to these ports on another desktop computer. Computer is Windows 7 Pro. What changes can allow me access to the file sharing via VPN while keeping the firewall turned on? Ok. I found the answer by myself. Go to "Windows Firewall with advanced security" in "Administrative Tools". Select 'inbound rules. Find the "sharing of files and printers (SMB-In)" Local Port 445. There are several of these rules. Select the asset that has the green button. The default setting for "Remote address" is "Local subset". Change the "remote address" by "any". This works. Find my phone turned off and still can not activate for new user Hello I bought a 6 s 64 GB Iphone to a friend yesterday and immediately restored to use for my part, but now it asks me to enter the my friend apple ID to activate, even tought "find my phone" was not enabled on this device. The thing is that my frie Lenovo T61 cannot turn on after short circuit Dear Sir/Madam I saw a low battery warning displayed on my lenovo t61, quickly, I plugged an ac cable while the power was on. As a result short circuit, no longer works. I tried the trick after pressing 10 times on the power switch. He worked, prompt touch screen does more than a few days after the release of Marshmallow. Hello. I ask for some advise the issue I'm having with my z3 compact. I was really happy, the phone never had problems, and I always have the software updates as soon as they are available. Now the phone has 3 days until the end of the warranty and a Hi all just now and with collaboration with Cisco I m right change a network client from the depths. A question was raised on the benefits of changing a core of 6500 to a core of firewall in the backbone of the network. I ve had my doubts about put aSimilar Questions
System to regain the power ROM
System restarted at 14:38:50 GMT Tuesday, July 29, 2014
System image file is "flash:/c3560-ipservicesk9-mz.122-55.SE1.bin".
new authentication attempts to specify number of authentication retries
DSCP DSCP IP value for SSH traffic
Configure logging for SSH logging
priority of the value of IP precedence for SSH traffic
source-interface interface to specify to address SSH source
connections
timeout specify SSH timeout
Protocol version to specify supported version
System to regain the power ROM
System restarted at 14:47:49 GMT Tuesday, July 29, 2014
System image file is "flash:/c3560-ipservicesk9-mz.122-55.SE9.bin".
new authentication attempts to specify number of authentication retries
DSCP DSCP IP value for SSH traffic
Configure logging for SSH logging
priority of the value of IP precedence for SSH traffic
source-interface interface to specify to address SSH source
connections
timeout specify SSH timeout
Protocol version to specify supported versionMaybe you are looking for