Server Fault Stack Exchange
Server Fault Stack Exchange

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.

Telnet is a protocol for bidirectional interactive text-oriented communication with remote hosts via virtual terminals. It is defined in RFC 854.

Telnet provides no inherent security and so is becoming less commonly supported. On modern UNIX-like systems it is usually replaced with more secure and flexible SSH protocol.

335 questions
0
votes
0 answers

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, packet losses 0% and time is less than 1 ms. This is…
dannydsouza0908
  • 33
  • 5
0
votes
0 answers

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 the server side, I look at the tcpdump trace :…
JoeJoe
  • 3
  • 1
  • 5
0
votes
2 answers

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, I'd like them to be disconnected from the…
Kladskull
  • 1,255
  • 5
  • 15
  • 32
0
votes
1 answer

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 checked with netcat or telnet…
Joe
  • 109
  • 1
  • 2
0
votes
0 answers

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 servers, but not in the browser. I really want to…
Nathan
  • 101
0
votes
1 answer

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 80 and 443 are open to public via Amazon Security…
Aftab Naveed
  • 153
  • 1
  • 7
0
votes
0 answers

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 ports, one used for the public ip and another…
Milos Cuculovic
  • 423
  • 3
  • 8
  • 22
0
votes
1 answer

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 Exchange are failing with a timeout error. The server…
FiZi
  • 84
  • 4
0
votes
2 answers

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('xxx.xxx.xxx.xxx','user', 'password') or die…
CRMarketing
  • 23
  • 1
  • 6
0
votes
2 answers

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/externa IP from inside: Does not work -> Timeout I…
Jack
  • 101
  • 3
0
votes
2 answers

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 that uses that port, and said to try using telnet…
Avrohom Yisroel
  • 101
  • 4
0
votes
1 answer

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 127.0.0.1 25), and successfully send messages. Every…
AlexMelw
  • 121
  • 4
0
votes
2 answers

Telnet without passwords

Back in the days of Redhat 9 I set up networks using dumb terminals that used telnet to log in to the server. And simply by deleting the 'X' in /etc/passwd for the user, the user could log in with a user name only. This allowed easy operation of the…
simplr
  • 520
  • 5
  • 11
0
votes
1 answer

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 for Chef. However, when trying to telnet, I get…
ryan
  • 11
  • 1
0
votes
2 answers

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) using particular ip addresses to yahoos mta (check…
sherpaurgen
  • 616
  • 6
  • 10
  • 26
1 2 3
…
22 23