Telnet is a protocol for bidirectional interactive text-oriented communication with remote hosts via virtual terminals. It is defined in [RFC 854](http://tools.ietf.org/html/rfc854). Telnet provides no inherent security and so is becoming less commonly supported. On modern UNIX-like systems it ...

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How to Telnet to Pop3 server?

I have an interview coming up and I want to play around with POP3 and SMTP protocol. I'm trying to login to my gmail's pop3 server account using Microsoft Telnet command line program but it's not ...
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telnet: connect to address ::1: Connection refused

when I run '(sleep 1; echo flush_all; sleep 1; echo quit; ) | telnet localhost 11211' I get Trying ::1... telnet: connect to address ::1: Connection refused Trying 127.0.0.1... Connected to ...
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How to connect to other linux machine OS from windows through Telnet command

I wanted to connect to my Linux OS (specifically for Terminal prompt), through my Windows OS. I have Linux configured through a virtual machine, as well as through a separate partition. How can I ...
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telnet port forwarding

Anyone knows if it is possible to setup port forwarding with a telnet client, like it is with SSH?
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333 views

Can Telnet to port 21 but not 25, 110

I am running postfix and dovecot on my Centos Mail server. Now I can send mail from the server to the outside, BUT I cannot receive mail from the outside. TELNET: When I telnet to my ip address to ...
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telnet source IP

I have a multihomed Windows 2003 server. Is there a way to specify the source IP address to use with the telnet client?
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Telnet Results in “Connection closed by foreign host”

I'm not a networking guy, so I apologize if my question is dumb. I have two Ubuntu machines setup on Amazon EC2. I need to "talk" from one to the other via port 9300. On my receiving machine, I ran ...
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Server won't respond to ping

I have a server that won't respond to pings, but I can remote desktop to it. The server has two LAN connections. Each has the same subnet mask and default gateway, but separate IP addresses. I'm ...
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484 views

Cannot connect from Linux to SQL Server through a firewall

I need to connect from a Debian GNU/Linux webserver to an SQL Server database which is hosted on a Windows machine within an organization's local network. The person in charge of the database server ...
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262 views

Good HTTP Monitoring tools

I look for HTTP to work with a Linux system server monitor tool every protocol. I know, and will not there be it in whom or a freeware? When, for example, I dump 80/tcp with a packet monitor to be ...
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156 views

SSH on FreeBSD 8.1 sshd is not running

After reading many pages of documentation and articles on how to telnet or SSH into FreeBSD as root, none have given me a solution that actually works. I am looking for a how-to-remote-into this ...
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new Catalyst 2950 switch, no console or telnet CLI access

I am connecting a brand-new Catalyst 2950 switch to my LAN. It is on with green lights, and frames successfully go in and out the ports. The switch is on the same LAN has my host PC, and pings are ...
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Cisco router - edit or view file content in telnet

Is there a command for editing (or at least viewing) text file content (that is on flash card) ?
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Windows telnet client that does carriage return on LFs

I have a customized box sending mostly LFs for line breaks (sometimes CRLFs too). I wish to connect to it from a Windows box using telnet, but it seems it won't do the carriage returns where lines ...
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756 views

Connecting to a LDAPS server

I am working on a development machine and I am trying to connect to my LDAP server. This is what I do - telnet ldaps- 686 then the response is - Could not open connection to the host on ...
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How to change OpenSSH banner text when testing the port via telnet

I'm deploying a script that runs on various clients behind firewalls that I don't control. The script attempts an SSH client login to a remote server that I do control (the script comes pre-loaded ...
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Scripting (piping) commands into a telnet session

i use a cronjob to execute a filetransfer to a host and then telnet into the host and pipe some commands into it. HOST=somehost USER=postgres PASSWD=blabla ftp -n -v $HOST <<END_SCRIPT quote ...
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158 views

Is it normal for port 23 to be connected to periodically?

While working at a customer site (a LAN that includes several Windows machines, plus our server) I noticed that something was periodically attempting to connect to our server on port 23 via TCP. ...
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2k views

Can I telnet from Linux to Windows when authentication is NTLM only?

I've got a Windows telnet server set up to accept NTLM only (password authentication mechanism is disabled). Is there any way to telnet to this server from Linux, using a "standard" telnet client ...
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29 views

show users connected to windows telnet server

I can't believe how bad I am at googling windows stuff. How can I list the users connected via telnet to a windows machine? It seems such a basic question, yet I couldn't find a answer. X-( Also, ...
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151 views

Linux restrict a telnet and rs323 user to only run a few programs

I have an embeded linux video server that I just finished. One of the features is that I have a telnet server as well as getty bound to an rs232 port which a user can log into to call a few programs ...
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43 views

How can I determine which users are authenticating via ftp or telnet?

I've inherited a system that has both telnet and ftp enabled. As both these send passwords in cleartext I want to disable them. But many users have never changed their ways to use sftp or ssh. And ...
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10k views

Reboot Zyxel router via Telnet

I've got a Zyxel P-661HW-D1, I was wondering if anyone knows how to reboot it via telnet? I can't seem to find the command... Thanks, Kieron
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smart client for dumb tcp socket?

I have a server that listens to simple tcp sockets. If connecting to it, it prints a prompt and I can type commands, hit enter, see (and save) results, and then have the prompt again. I'm using telnet ...
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623 views

Per-user login.cmd in Vista?

I would like to know if there is a per-user version of %SystemRoot%\System32\login.cmd available? The default login.cmd file contains comments hinting towards this, but I can't find anything about it ...
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41 views

SMTP Server setting on Windows 2008 R2

I am very very new to this and just trying to configure SMTP virtual server. I have followed a few threads to get it all running, but the mails are not being delivered. What I have done so far - 1) ...
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Better telnet tool on Windows [closed]

When I need to check whether a firewall rule has been opened or whether a service is up and running, I usually run a telnet test, basically "telnet 192.168.1.50 80" for e.g. If a firewall is dropping ...
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297 views

How do telnet-based programs report their terminal type to a socket server?

I've written a script called by tcpserver that heavily utilizes tput and similar commands. These commands need to know how to correctly write to the terminal and rely on the TERM variable to obtain ...
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postfix: Temporary lookup failure for FQDN

I'm using the FQDN of dur.bounceme.net which I want to resolve(?) to localhost. That is, I want mail to user@dur.bounceme.net to get delivered to user@localhost. I've tried following the Ubuntu ...
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172 views

telnet server not executing commands

I am connected in a telnet session in linux environment, but when I type commands and press enter, nothing happens. The TCP connection is in established state and when I checked the packets, the ...
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190 views

Can't telnet from windows machine to OS X laptop on same network?

I'm trying to telnet from my windows box into a service running on a known-available port on a mac laptop, but the connection is getting refused. I can telnet into the service locally. Firewalls are ...
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975 views

Why does bash invocation differ on AIX when using telnet vs ssh

I am using an AIX 5.3 server with a .bashrc file set up to echo "Executing bashrc." When I log in to the server using ssh and run: bash -c ls I get: Executing bashrc . .. etc.... However, when ...
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467 views

OS X Server: SMTP Server problem

I have problem to setup my mail server. My system is a OS X 10.6.2. Server. I configured the mail server so far, but I cannot connect to the smtp server correctly. Correctly means that I can connect ...
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Telnet to smtp server port 25 --> Connect failed

I want to send an email via telnet. When I typed to the command prompt telnet 'smtp_servername' 25 the following message appears Could not open connection to the host, on port 25: Connect failed ...
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Send login credentials and commands using shell script via telnet

I'm trying to run a couple remote commands on a box that will not give me a normal shell (it's a device with a proprietary shell). I'm also running the command from a device with a limited set of ...
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96 views

How can I disable sending mail through postfix smtp with out auth

I just setup a mail server with postfix 2.6.6 and dovecot. I have the auth related config in main.cf like below: smtpd_tls_cert_file=/etc/httpd/ssl/mail.crt ...
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171 views

Having to restart xinetd service to connect via telnet

In my environment I have a linux server running CentOS 5. I have setup a telnet service on this server in order to connect via telnet. However, after some time I try to connect and I get this error: ...
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653 views

Unable to telnet to a Windows 7 client on port 9102 while setting up Bacula

I'm trying to setup Bacula for all my work machines. Most of my machines are Linux (Ubuntu) based and I have successfully managed to setup Bacula on those machines. However, I do have several Windows ...
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“Not all privileges or groups referenced are assigned to the caller.” when connecting to Windows 7 Telnet

I'm trying to configure telnet server in windows 7. When I try make a telnet connection from another machine within the LAN, and I log in with the username and password of a administrator account, I ...
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973 views

Automate hop by hop telnet to Cisco router

I need to automate telnet to a Cisco router and get a "show version" result. The problem is, I need to first to telnet to A, from there telnet to B and then only be able to telnet to the Cisco router. ...
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601 views

Telnet exit status are equal for connection refused and connection tiemout

I create a bash script that check the connection to an host with telnet. That's the core code: telnet $X 2404 < $TEST &>/dev/null if [ $? -ne 0 ] ; then echo -n "$X " >> $LOG_FILE ...
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366 views

Routing telnet/23 connection thru double SSH tunnel (SSH proxy server)

I have a contractor is using a Windows PC that is outside the corporate network. However, we allow connections via the firewall to certain hosts/ports. Telnet/23 from the contractor's PC to a ...
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287 views

Telnet hangs with vim [closed]

I'm starting to use telnet for remote access and control of others windows pc. The problem that I'm facing is that when i start the VIM program the telnet session hangs and it doesn't respond to any ...
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What's the best way to telnet from a remote Windows PC without using RDP?

Three Networks: 10.1.1.0 - Mine 172.1.1.0 - My Branch Office 172.2.2.0 - My Branch Office's VOIP VLAN. My PC is on 10.1.1.0. I need to telnet into a Cisco router on 172.2.2.0. The 10.1.1.0 network ...
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988 views

Windows 7 system32 different contents depending on how its viewed

Using Windows 7 x64 Enterprise. When I view C:\windows\System32 through explorer I can see telnet.exe, if I open cmd from the start menu I can use telnet. If I open C:\windows\system32\cmd.exe via ...
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3k views

Verify connectivity to a server on a UDP port

I want to know if a HP-UX machine can communicate to a remote machine (which I don't have control over) on a particular port using UDP. I tried telnet, but it doesn't look like it supports UDP. I ...
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redirecting output from telnet / nc to file in script fails when cron'd

So, I have device on my network which sits there listening on a port for a connection, and when a connection is made it dumps ascii data out. I need to capture that data to a file. I wrote a dead ...
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Force telnet mode to character without using telnet commands

I have a remote host C accessible using telnet from host B. From the host A, I use ssh to create a port forward for access to the telnet server of the host C. I use the following command at hostA ...
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Pasting extended ACL contents into telnet session to Cisco Router SIM

I have a telnet session to a dynamips router sim. When I try to paste the contents of an actually working ACL retrieved from 'show run' into the access list, only part of gets pasted. The session is ...
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How to specify “terminal-speed” option explicitly in native linux GNU telnet client?

I'd like to be able to set the terminal-speed option explicitly in a native Linux GNU telnet client. Some context to my problem: I'm unable to login to an HPUX host using telnet when the telnet ...