Questions tagged [telnet]
For questions about Telnet, a protocol for bidirectional interactive text-oriented communication with remote hosts via virtual terminals. It is defined in RFC 854.
336
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Check if HTTP Methods have been Allowed and Enabled on Localhost
I’m running Apache/2.2.15 (Unix) on a RHEL system. My LAMP is running on localhost.
I want to check if the HTTP methods:
POST
GET
PUT
DELETE
are allowed and enabled.
I’ve read that they can be ...
CommunityBot
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-1
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2
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Telnet not working with windows 10 [closed]
I am using telnet on windows 10. I would like to manually set get requests to chosen server.
If I type (just example it can be any site):
telnet www.cnn.com 80
for a second I see message '...
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0
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2
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Test TLS TCP Endpoint
I have TCP endpoint for a Service running with TLS (Self-Signed) Certificate. To test this endpoint I use openssl s_client -connect service.domain.com:5050 which prints CONNECTED(00000006) nothing ...
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2
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3
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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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0
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VMWare network: some guest service not accessible from host
I have elastic search installed on a guest (CentOS7) on my vmware host, I am able to visit it on the default port 9100:
If I access it from the guest directly, it shows differently:
If I telnet from ...
- 145
2
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1
answer
1k
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Postfix (Imap) with Dovecot: no auth available
I'm using Dovecot to get Imap access to my mail server (on Raspbian). I'm using system users and am able to successfully test logins (doveadm auth test ...). But I'm not able to get auth option via ...
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2
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1
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Testing connectivity between Unix and Windows servers
I am doing a failover activity between 2 data centers.
In 1 data center, 1 Oracle database on Linux is replicating data to 1 SQL Server database on Windows using a replication tool.
There is storage ...
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1
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1
answer
8k
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emulate telnet over ssh
I have a client/server application that work over a telnet connection, and it does not support SSH. Basically the client opens a telnet connection to the server, which starts a specific shell, and the ...
CommunityBot
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2
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0
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51
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How to Open Telnet Console in post section of Kickstart [closed]
I want to configure external VxWork based device in post section of kickstart file, this accept telnet based commands. I found following
#!/usr/bin/expect -f
send -- "terminal length 0\r"
expect "*?...
- 170
1
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2
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4k
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Unable to connect to AWS ec2 instance public ip via browser
I've newly installed Openresty as the web server on an ec2 instance and its currently running but I can't even view the welcome page when I try to navigate to it via my public ip address at the ...
- 825
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2
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[Shift]+[F1] not working in putty telnet sessions
Update:
I configured putty (Windows 8; x64) to send exactly the same data as an old 16 bit Hyperterminal (Windows XP). I tested it using Wireshark.
But still the Software on the Suse Server does not ...
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0
answers
1k
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Telnet shows blank screen on port 443 but TCP handshake not done
From my windows 10 machine (172.18.164.50) if I do a telnet 172.20.187.10 443
It shows a blank screen as if it is connected.
It is totally unespected because in theory a firewall is blocking the ...
- 2,529
1
vote
3
answers
9k
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Email server attack from telnet
My mail server having a problem on blocking some attacker that trying to telnet to our mailserver.
but i'm not able to block it, ip will keep changing even we block by ip. seems like he is trying to ...
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1
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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 ...
CommunityBot
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4
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Best Method to test Opened Ports [closed]
We have a requirment where in we have to test 500+ Port opening rules. So requires a suggest on below points.
Which is the best tool to test the connectivity of the ports. Telnet will be sufficient
...
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1
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How can I abort a telnet connection attempt? [closed]
Suppose I execute the following in command prompt:
telnet XXX.XXX.XXX.XXX 80
half a second later, I realize it would never connect (for whatever reason). I want to abort the connection attempt ...
1
vote
1
answer
319
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Why do we need the host name again when downloading the webpage by using telnet?
I learned you could use telnet to download a webpage(making http request), like
telnet www.example.com 80
GET HTTP / HTTP/1.1
HOST: www.example.com
then the output would be an html source page or ...
- 33.2k
-1
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1
answer
2k
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Why smtp server can not be telnet?
https://www.webdigi.co.uk/blog/2009/how-to-check-if-an-email-address-exists-without-sending-an-email/
I am following the above instruction to telnet an email server of gmail. But I got an error. ...
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0
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319
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How to set the mode of port? access, trunk, general
I tried to set (change) the mode of my port, and I read the book and followed it step by step. But I still get a lot of error.
There were what I input.
(Routing) (Interface 0/3)#switchport mode ...
- 159
1
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2
answers
6k
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Is there a security risk to just having the telnet client installed on Windows?
I was recently asking for the telnet client to be turned on on my Windows install. The devops guy told me it was restricted because it passed people's usernames and passwords through clear text. I ...
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1
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How can I enable SMTP receipt through firewalld on Linux?
I've leased a dedicated, lightly-managed CentOS7 box from a hosting company. The host came with firewalld installed and running and with its iptables preferences pre-imposed.
I was not expecting ...
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SSH and Telnet connectivity issues. It connects sometimes and sometimes it does not
I have come across a problem with SSH and Telnet wherein the connectivity is slow and drops multiple times. But I see that my network has no problems. When I ping a server, it gives me ttl of 127, ...
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0
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telnet 3-Way Handshake
I'm trying to see a simple 3-Way Handshake using telnet on the Client side and tcpdump on the Server side, both Client and Server are inside VMs.
I use telnet this way :
telnet 172.10.10.21 80
On ...
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1
vote
4
answers
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telnet on port 1433 not working
telnet some_ip 1433
On Windows 7 this line doesn't work. It says it cannot establish connection. I'm 100% percent sure that the server has this port open. For a friend of mine this line works.
I ...
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4
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2
answers
21k
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Unable to telnet out on port 25 on windows server 2008
I just setup a Windows 2008 R2 server and am trying to get a basic mail server up and running so that I can send emails from my applications.
I setup a virtual SMTP server in IIS6 and tried doing a ...
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1
answer
2k
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Telnet through a serial terminal server
I have a Perle IOLAN device like this, and one configuration option is for a serial terminal.
The corresponding configuration screen.
As you can see, one option is to configure the terminal to ...
- 132k
1
vote
1
answer
4k
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Telnet SMTP gives OK but not accepted or queued message and mails not received
I am trying to debug a CDO.Message.1 error '80040213', The transport failed to connect to the server.
So I am testing the connection to the SMTP server via telnet. After entering the DATA I am ...
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4
answers
6k
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script to test mail server
Ever since a windows update that took down my IIS6 mail server a few weeks back, I've been really paranoid about my mail server working.
So every time I run a windows update I fire up command prompt ...
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2
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1k
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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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1
answer
14k
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Use telnet to check that VNC port is open
I am supposed to connect to a Mac VNC/ARD server. Let's say that the Mac VNC server has the hypothetical IP address 8.8.8.8.
I want to check if the Mac VNC server even listens to the default VNC port ...
- 166
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1
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telnet: Unable to connect to remote host: Connection timed out
Setting up a postfix server, trying to figure out why it's not working. Here's a command that I ran while troubleshooting. I expected to be able to connect, but could not.
lol@foldingmachine:~$ ...
- 253
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2
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201
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How can I run an interactive console program when a user connects via SSH
Looking to start a python program when a user connects to my SSH server. An example use case would be a MUD program (except using SSH and not Telnet). If they somehow exit the program or it errors out,...
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0
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172
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OpenVPN connected, partial internet [IPv6]
I've got an OpenVPN server set up and it works wonderfully, with all internet traffic using the VPN connection. On one specific WiFi network, I can use telnet/openssl s_client to connect to web ...
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1
vote
1
answer
623
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Unable to telnet particular server IP from our CentOS 7.2 server
I am unable to telnet a partner server IP (103.x.x.x) from our server.
I am getting following error
telnet: connect to address 103.x.x.x: Connection timed out
but I am able to telnet other server ...
- 5,332
3
votes
1
answer
11k
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Connecting to Hotmail's IMAP Server using Telnet [closed]
Hotmail appears to have two separate IMAP ports:
imap-mail.outlook.com 993
And:
imap-mail.outlook.com 143
My guess here is that 143 is unsecured, and 993 is over SSL. However, when I try to ...
CommunityBot
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1
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2
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Linux - opened port, but still fail to connect to it using telnet
I'm currently working on CentOS 7.3.
In order to activate SNMP, I installed it, configured it and successfully started the service using the firewall-cmd command.
Now, I realized that I need to ...
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1
answer
5k
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"No route to host" when i do a telnet in azure
I have two VM's in azure with different public IP's and whose private IP's are :
10.10.1.9
10.10.1.6
When i do a telnet with following command from the server 10.10.1.6, i get the a error:
telnet ...
- 314
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1
answer
991
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Amazon EC2 Ubuntu 16.04 telnet works on some ports and not for others
I am having a strange issue on my newly installed Amazon Ec2 ubuntu 16.04 LTS server.
I have a server with ip (10.129.29.46) in a VPC which has the following ports open 80, 443, 11300 and 9000. Port ...
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0
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297
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SSH or telnet on other ports is not working from a specific network
We have an Lenovo server working well since one and a half year.
Sudenly, we started having issues to connect to it from our office network.
I reinstalled ubuntu 16.04 sever on it. It has two ethernet ...
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1
answer
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Exchange 2016 is ignoring a single host for SMTP/EWS
We've just completed a deployment and migration from Exchange 2010 to Exchange 2016.
Our ticket system connects to an Exchange mailbox to generate tickets. Connections from the ticket system to ...
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1
vote
1
answer
2k
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Unable to telnet at port 80 AWS EC2 instance
I have allowed port 80 on my ec2 instance, and this is my iptables rules on it
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy DROP)
...
- 203
0
votes
2
answers
2k
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Server remote MySQL connection not working after PHP upgrade from 5.4 to 5.6
MySQL remote connections used to work ok. Now it's not working anymore and we think it may be related to a PHP upgrade from 5.4 to 5.6.
I did a script to test this connection:
$db = @mysql_connect('...
- 23
16
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9
answers
85k
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Send an email with an attached file using telnet or netcat
I often use telnet or netcat to connect smtp servers to send an email as a test.
Does anyone know how you would send an email using telnet or netcat but attach a file as well? There are probably ...
- 51
5
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6
answers
10k
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How to customize telnet login prompt on linux
When I run login command on debian, I get:
hostname login: _
on RHEL5, Solaris or HP-UX I get:
login: _
I need to be able to customize login: and password: prompts it on a Linux box. I can ...
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2
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2k
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Local Server with external IP not reachable when in LAN
I have a local debain server with external IP and my own domain. But I got following problem:
Using DNS/external IP from outside the LAN: Works
Using local IP from inside the LAN: Works
Using DNS/...
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2
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1k
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How do I find out why port 8172 is blocked?
We have some web sites hosted with a third-party company, and wish to use web deploy. They have told us that we need to ensure that port 8172 is open, as that is needed. As a test, they gave us a URL ...
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1
answer
563
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POP3 Server: ERR Unsupported authentication type
I've installed Axigen Mail Server and enabled SMTP and POP3 servers.
After that, I've created domain (slava.local) and an user (slava).
So now I can connect to the SMTP server (using telnet, open ...
Andrey-WD
0
votes
1
answer
166
views
Windows port will not open in google compute engine
I've added a firewall rule in GCE udp:5585;tcp:5585 in my networking config.
I've also added an inbound rule in Windows to accept both udp and tcp connections on port 5585. I'm trying to set this up ...
google-compute-engine
-3
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2
answers
2k
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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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0
votes
2
answers
2k
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use multiple ip addresses to tcp check remote server's port
Im trying to tcp connect yahoo's mail server on port 25 . I have 3 public ip addresses lets say:-
(all are allowed in SPF records)
99.99.99.99
77.77.77.77
88.88.88.88
How to telnet(or other checks) ...
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