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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“Connection failed” error when trying to telnet into SQL Server

I have an SQL Server running on a computer, and I'm trying to access it from another computer in the same local network (potentially VPN, since it's located in a datacenter). The point is that I can't ...
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2answers
705 views

Sending Email by SMTP IIS7.5 via php site

After my company decided to change the website we switched from old ASP.NET site to new website created in Drupal(php). The site is running locally on IIS7.5 and we also have virtual SMTP server on ...
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760 views

Can I change my sendmail port?

I am having a problem sending mail through sendmail. I have configured sendmail and it is fine. I telnetd the localhost and it connects but when i telnet port 25 is says telnet: Unable to connect to ...
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1answer
147 views

SSH/ Telnet PAM configuration

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

Telnet server on linux redhat - deletes char, shifts on terminal console

When I open telnet client from local or remote console, I get damaged output in console like below example: -welcome screen appears properly (also when I put some text into nss. -1st char of words ( ...
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463 views

Telnet: Unable to connect to remove host: Connection refused (Postfix - Ubuntu 14.04 VPS)

I have installed postfix following this tutorial but when I try to telnet mail.mydomain.com 110 (995,993,143 or 25) it throws the following error: Telnet: Unable to connect to remove host: Connection ...
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1answer
181 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 ...
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52 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 ...
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1answer
306 views

munin-node in openvz-container not reachable from host-system

I have a problem figuring out why my openvz-container is not reachable from the outside (host-system) on port 4949. netstat in the container: [root@openvz ~]# netstat -utapn |grep 4949 tcp 0 ...
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503 views

How to display ANSI Escape codes e.g. from tshark telnet trace?

How does one display/visualize a trace of a session with ANSI Escape codes embedded in it? I have a tshark trace of a telnet session to a HP switch. From that, I Follow TCP Stream and get a ...
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396 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 ...
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187 views

Dovecot problems downloading mails

When I run telnet localhost imap2 both from localhost, using IP from external, mutt -f imaps://lasse@"mydomain"@localhost and using webmail, I can view my messages. But If I run mutt -f ...
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24 views

xinetd service is up but not listening on port 23

I am trying to open a telnet connection from a Wheezy VM to a router in GNS3 but even though the ping is successful, I am unable to open a telnet connection from the VM to any of the routers. the ...
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0answers
90 views

Issue with executing net use command through telnet session

When executing net use command for mapping cifs share to windows drive. The drive is available only for that telnet session. But when i am doing it manually the drive is available permanent. ...
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279 views

“connection closed by foreign host” on one port but not another

server1 (suse linux) should be able to connect to server2 (redhat linux) on ports 4750 and 1080. when server1 connect to server2 (using telnet as a test) using 4750, the connection stays up and open. ...
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37 views

Allow console access to physical machines through telnet

We have a Super Micro server blade in our lab running a custom OS.The console of the OS can be accessed using the Super Micro web interface. A window gets created by running a .jnlp which needs to be ...
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0answers
93 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 ...
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0answers
104 views

IIS7.5 non-http port routing

I am trying to use IIS7.5 as a way to route to vnc on different servers or virtual servers. I cant get http to work but not non-http protocols like VNC, telnet, etc. Is there a way to do that? ...
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17 views

why LINK HTTP request has bad response?

i uses powershell.my problem is in telnet.when i type below command it connects to google.com. telnet google.com 80 when it is connected i type GET,its response is normal return page source HTML ...
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10 views

Setup router iptables like VPN for single pc

I'm currently far away from my office for a family visit. One of the applications got frozen and needs a restart. The config files are set up to only accept logins from local ips. Only device I ...
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44 views

Cannot telnet to port from Azure VM

I have an Azure VM setup and I have a program that SSH's out from that VM to port 7022 on my supplier's server. Sometimes I am unable to connect to this port and this can last for up to 30 minutes or ...
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75 views

Windows Telnet Could Not Open Connection On Any Port, Connect Failed

Configuration: Host: Hyper-V Windows 2008 R2 Guest: Windows 2008 R2 No firewall, no antivirus Problem: After 5 or 6 days, the guest cannot make any TCP connection to outside, neither can do to ...
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132 views

Solaris 5.10 telnet connection closed by foreign host

I try to connect to a Solaris 5.10 server using telnet, but I only see: $ telnet xxx.xxx.xxx.xxx Trying xxx.xxx.xxx.xxx... Connected to xxx.xxx.xxx.xxx. Escape character is '^]'. Connection closed by ...
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176 views

Socket Error 10054 - VS2013 Web Deploy Failing

I'm having trouble completing a web deploy from VS2013 as I posted in VS 2013 Web Deploy failure: Warning : Retrying the sync because a socket error (10054) occurred Apparently web deploy uses port ...
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50 views

Purpose of sysctrl tcp timeout unack field

Could some one let me know the purpose of sysctrl tcp timeout unack? If i modify this value from 300 t0 400, what will be the impact. /proc/sys/net/netfilter/nf_conntrack_tcp_timeout_unacknowledged ...
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154 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 ...
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348 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 ...