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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1answer
68 views

Is port 21 active? [closed]

I have recently installed sftp (secure shell ftp) into proftpd. Knowing that the default port for sftp is 22, I have also changed the port value from 23 to 22 in /etc/proftpd.sftp.conf. So I expect it ...
2
votes
1answer
383 views

remote login failed on windows XP, but remote telnet successful on mac

I recently set up an Oracle DB, started the listener on port 1561, and enabled TCP access. I then opened that port to all incoming connections. When I get on my Mac - I can use telnet remoteserver ...
1
vote
1answer
715 views

Telnet 3306 fails to connect to Amazon EC2

Ok, I know this has been asked a lot, but I've tried every advice I can find and I still can't telnet to my Amazon server on port 3306. Add iptables entry for accepting connections on port 3306: ...
2
votes
1answer
129 views

Non-invasive way for our network team to run ping/tracert/etc from various servers

In troubleshooting connectivity issues, our network team lacks the rights on our servers (Windows and RHEL) to connect and test connectivity (for example, when tweaking a firewall rule, a ticket ...
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votes
1answer
2k views

Connect to remote host from windows using SSH/pem [closed]

So I have a .pem and I need to connect to a remote machine using that. I have been told to do: ssh -i key.pem root@remote machine Before that I am supposed to chmod 600/400 on key.pem I am on ...
1
vote
1answer
620 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, ...
2
votes
1answer
48 views

Preventing SecAst access from across the network

I have SecAst up and running great, and I realize that any workstation on the network can access the SecAst telnet interface. Is there a way to limit this to only my laptop? I don't want one of the ...
0
votes
1answer
212 views

TCP RST from telnet/ssh daemons when connecting from openvpn

I have LAN_1 and LAN_2 interconnected with an openvpn tunnel terminated ona pair of SOHO routers running busybox. One of the vpn purpose is to allow clients on both LAN_1 and LAN_2, to administer the ...
0
votes
1answer
726 views

postfix - connection refused from behind NAT

When attempting to telnet postfix from a different host in the same LAN through the FQDN (and thus the LAN's public IP), the following error occurs: root@mailer:/var/log# telnet mail.domain.com 25 ...
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votes
2answers
97 views

How to enable password for users sending emails to it self? [closed]

All emails users require password but if i login with telnet to port 25, i can send a email without password if the from and to are from a list of valid emails accounts. Can anyone tell me how to ...
1
vote
1answer
2k 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) ...
2
votes
1answer
181 views

Service Closing transmission on OpenSSL [duplicate]

I am trying to send email through OpenSSL as below : Client > openssl s_client -crlf -connect smtp.mail.yahoo.com:465 SERVER > 220 smtp.mail.yahoo.com ESMTP ready Client > HELO localhost ...
0
votes
1answer
56 views

Problems in testing telnet using postfix

i am quite new so please be a bit patient XD i am trying to configure a mail server using postfix (which implements a database for aliases, domains and mailboxes) and courrier on ubuntu. I have this ...
1
vote
4answers
3k views

How to restart Alcatel-Lucent OmniSwitch 9600

I need to restart/reboot an Alcatel-Lucent OmniSwith 9600. I cannot find the option to reboot the switch from the web interface. How else can I reboot the switch without pulling the power? I was able ...
0
votes
2answers
5k views

telnet connection refused despite ufw having ports open [closed]

How is this possible? I dont understand Server A ip=111.111.111.111 Server B ip=222.222.222.222 Server A: ufw status 23 ALLOW 222.222.222.222 9160 ...
1
vote
1answer
873 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 smtpd_tls_key_file=/etc/httpd/ssl/mail....
5
votes
1answer
30k views

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 ...
0
votes
2answers
1k views

How to start a program through putty, then disconnect but program keeps running on remote Ubuntu machine? [closed]

I will be running some batch process on Amazon EC2 Ubuntu 12 machines. I can log in using putty, run the command. The process will run for a day or two. There is a chance the putty will get ...
3
votes
3answers
1k views

Automation in Windows Instances on Amazon EC2

I am working on a compute service that will require automatic deployment of our software (~30 megs). The software is a WCF service, so I am stuck with windows. I can't use mono because we use lots of ...
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votes
1answer
627 views

Knowing when a qemu vm shutdown (initiated via telnet using QMP) is finished

When I start a qemu (Windows Server 2003) virtual machine with -qmp tcp:127.0.0.1:4444,server,nowait I can make it shutdown with the following script #!/bin/bash telnet 127.0.0.1 4444 <<JSON ...
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votes
2answers
4k views

How to access a windows command line from a linux machine? [closed]

How to access the windows command line from an ubuntu machine. OS in question is Windows 7 and Ubuntu 12.04. Accessing here refers to remote access.
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votes
2answers
8k views

How to limit telnet access to only local network users in Cisco [closed]

I need to make so that my telnet service is only reachable by local users, not by anyone from outside in Cisco Packet tracer. Any suggestions please? http://i.imgur.com/RfoNjDz.png
2
votes
1answer
1k views

Can't establish connection on port 80 for yum

Hi guys I have a very strange issue happening on one of my boxes. If someone can advise what I can check please let me know. Thanks. Here's the layout. Box 1 & Box 2 <> Firewall <> ...
4
votes
4answers
2k views

Telnet connection to an AS400 system via telnetlib (Python)

I use telnetlib - Python - to create a telnet client - port 23 - to communicate with an AS/400 server. communication with the telnet command that is no problem, but with telnetlib I do not get any ...
0
votes
2answers
383 views

How to connect more than one telnet session to Cisco router ( Port Com10 )?

I am working on connecting more than one telnet session to Cisco Router. I was unsuccessful till now and decided to post it for getting any valuable directions and info. Thanks
1
vote
1answer
330 views

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 ...
0
votes
0answers
171 views

Telnet Terminal F3 Key Transmit

I am creating a new install image for deployment, upgrading from a previous deployment of Fedora Core 4 to Linux Mint 15. I have the telnet session to the server working and all keys are operating as ...
1
vote
1answer
1k 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: ...
1
vote
1answer
151 views

SSH/ Telnet PAM configuration

How do I configure maximum number of login attempts before the session is dropped for SSH/telnet in PAM?
0
votes
1answer
257 views

Redirect telnet “interactivity” from host 3 to host 1 through host 2 (proxy?)

My network configuration: host 1 [h1] - User machine connected via VPN to the main host (host 2). (Win 7) host 2 [h2] - The gate through other machines of my network. No firewall, no ip rules. (Win ...
0
votes
0answers
369 views

Can Telnet be used to test Direct Push is open “long enough”

I am getting the event below in the Eventlog regarding Direct Push for Activesync. If it matters we have a Cisco ASA and a Citrix Netscaler. Event 1040 MSExchange Activesync The average of ...
2
votes
1answer
216 views

Communicating with ARIN Whois server [closed]

Connecting to the ARIN Whois server via telnet works like so: telnet whois.arin.net 43 Once connected, getting information about an IP address is equally trivial: n 119.194.24.35 A lot of ...
1
vote
0answers
99 views

Passwordless remote access to a restricted shell

For, um, historic reasons, we have a C program for HPUX which accepts telnet connections, and runs a home-grown REPL that restricts the commands available. Rather than port this code to Linux, I'd ...
0
votes
1answer
1k views

Telnet to new SMTP server port 25 times out

I just got Postfix 2.9.6 up and running on a Debian 7 Wheezy server and I can send and receive mail to the outside world but I'm unable to login to the SMTP server. I've tried telnet, first by ...
1
vote
1answer
2k views

How to set telnet start after every reboot in suse 11sp3 x64

I have an issue on sles 11sp3x64 with telnet, if i reboot the machine telnet service not starting automatically. again i have to do service restart manually. is there any way to start automaticaly ...
0
votes
2answers
9k views

unable to connect through telnet in windows 7 [closed]

I'm trying to connect to my computer through telnet. I've turned telnet client and server on. I've opened port 23 on my computer firewall and on my router. But when i test it: C:\>telnet 192.168....
1
vote
1answer
828 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 ...
0
votes
1answer
759 views

Is it possible to secure the SAP Telnet Administration port (50008)?

Is it possible to secure the SAP Telnet Administration port, which is usually port 50008? I would like a SSH type connection, so that data cannot be intercepted/read and non-authorised connection ...
0
votes
1answer
164 views

Is server being compromised? I've seen a client telnet session at logon

I've seen open a new window with a client telnet sesion at login this morning at SBS 2011 server. The window displayed some random chars (non alphanumerics) a few seconds and gone. The server is fully ...
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votes
1answer
486 views

HP-UX - Telnet to terminal

I would like to use a run of the mill linux VM to connect to an existing HP-UX server through telnet. When I connect using the simple: telnet xxx.xxx.xxx.xxx I get my login prompt and everything ...
-4
votes
1answer
320 views

telnet aspmx.l.google.com and it try ipv6 first [closed]

well, I try to send email via google 'aspmx.l.google.com' server, port 25. I can send emial, technically. I just have to wait one minute to wait the sending process complete. Then I try to do telnet ...
1
vote
2answers
1k 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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votes
1answer
1k views

telnet open can not connect on a specific Centos server

i am using below command in the server but it cant connect to given ip and port, I tried to telnet from another locations and it works fine. Only in my server it cant connect. telnet open 151.XXX....
3
votes
3answers
24k views

How to test a connection without telnet? [closed]

I'm trying to test whether machine A can connect to machine B on certain ports. The sysadmins of machine A have seen fit to remove the telnet command. What would be a convenient replacement? Machine A ...
1
vote
1answer
370 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 ...
1
vote
1answer
759 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 ...
2
votes
4answers
6k views

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 ...
0
votes
2answers
4k views

Connection refused when doing telnet to windows machine

I am doing telnet to windows host from Linux to list Check_mk_agent data. but its giving me following output. [root@myhost ~]# telnet winhost 6556 Trying xxx.xx.xx.x... telnet: connect to address xxx....
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votes
1answer
932 views

Telnet Port 23 Not Responding' [closed]

I have an assignment that requires remote access into some Cisco routers. According to Netlab, it uses TCP port 23. I'm unable to pass the port test. I'm on Windows 7, I've tried all major browsers....
0
votes
1answer
3k views

Telnet doesn't accept Enter as a newline [closed]

I am just trying some really basic Telnet as part of a HTTP tutorial, but everything I've read assumes that the Enter key works very differently than how it's been working for me so far. So an ...