General :: Create Tunnel To Utilize For Telnet Connection?
Nov 8, 2010
Machine A is located behind client firewall. The machine runs telnetd. This is Linux machine with Python 2.5.4 installed. I do not know the IP addy of the router and firewall is not open incoming. outgoing firewall is open.
Machine B (Windows machine) is a server with well known IP address. I can install any programs I want on either machine.
The idea is that I want Machine A to open a socket to machine B. Then I want to hold that socket and use to run a telnet session from Machine B to Machine A telnetd server.
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Mar 14, 2011
I have an security cam with a built-in webpage inside my home network. That camera is using basic HTTP authentication instead of SSL. I want to be able to access the camera's webpage from outside my network, but I don't want to open an unencrypted video stream to the outside world. Right now, I'm doing some cumbersome ssh tunneling where I bounce off an ssh server like: ssh -N -L 9090:[URl]..and then I connect to my web page like: http://localhost:9090
But this is a pain. Now, gentle reader, I beseech you to tell me how I can use linux (Ubuntu) to get a fully encrypted SSL connection to my internal web page without the hassle of creating an ssh tunnel each time. I believe I can use stunnel, but I'm not sure of the command.
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May 23, 2011
I have CENTOS 5.4 Installed in one machine and i used Real IP provided by our ISP.My requirements for Mailserver are:
Dovecot
Postfix
everythings done but when i tried to telnet my External IP it giving me an error of telnet connection refused but i can able to ssh to my external IP and also i disabled the firewall but still no luck.
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Jan 9, 2010
I have Ubuntu installed, using transmission client to download a torrent.The torrent is coming down at ~300kbps, but my internet connection speedtests @ 50mbps...how do I configure connection to utilize connection?
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Jun 24, 2011
So I switch between Ubuntu and Windows alot, because some games I can only get to run smoothly in the windows environment. Anyways, one thing I have been noticing ever since I got Ubuntu but never really questioned, was about my download speeds. When downloading a torrent in Windows, I topped out out about 2.0 mb/s. Where as in my Ubuntu install, running the same torrent program (utorrent) and downloading the same file, I was getting 3.0 mb/s. I was wondering, what is it about Ubuntu that is utilizing my internet connection better? Only a hand ful of times have I ever reached 3.0 in my windows install (such as right now while I am downloading a game through steam).
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Jul 3, 2011
My system is Ubuntu 11Before I typed "telnet localhost" or "telnet localhost 23". I have make this work below:$sudo apt-get install xinetd$vim /etc/xinetd.conf
defaults{
instances=60
log_type=SYSLOGauthpriv
[code]....
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Sep 11, 2009
I did followings:
Code:
But got:
Code:
But as I tried:
Code:
It's OK.
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Oct 3, 2010
I Need to make an SSL tunnel over SSH, I need to create exactly an SSL tunnel,I have a situation like that, I heared it is possible,but don't know how to create an SSL tunnel over SSH i am having putty installed on my pc,So i think i can use putty for this purpose, But i don't know how to do this.
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Aug 3, 2011
I wanted to create an ssh tunnel but I do not know what commands to run .. my environment is as follows:
LAN Internet Office LAN
Home PC <-> Linux firewall <-> http server..
According to the above what I figure is that I have an internal web server at my job and I need to create a tunnel to access the web server from my PC in my home. I know I can do a port forwarding with the firewall but I don't want to publish this web server to Internet. My home PC and both servers (firewall and web) are ubuntu. My idea is create a ssh tunnel that forward port 8080 on localhost in my home pc, to the firewall (obviously with public ip), and the the firewall forward to port 80 on office web server at my job. Note that the firewall accepts ssh connections to port 22, same for web server...
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Jun 8, 2010
i need possible direction on setting up a tunnel between 2 different network. The tunnel will be used by devices from the 2 different network to communicate with each other (for eg DevA and DevB).
DevA <-> Linux A <=====================> Linux B <-> DevB
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Jun 15, 2010
Just give you the background:1) Let's call the two machines, Box A and Box B.2) OpenSSH is running on both machines.3) Key based authentication is setup between two users on these two machines, and both can login into the other with: "ssh user@host" with no problems at all.4) I'm also port tunnelling over SSH to encrypt some traffic between the two machines: "ssh -f -N -L 1000:HOSTNAME:1000 user@HOSTNAME"I can obviously then use "localhost:1000" to connect Box A to port 1000 on Box B securely.However ... and this is my problem ... I want this port tunnelling connection to be automatic when I boot the machine, e.g. "Presession" and "before" a user logs in.I tried adding to gdm/PreSession/Default: "ssh -f -N -L 1000:HOSTNAME:1000 user@HOSTNAME"But the problem then is because the user is not *logged in* at this stage, it can't use the user's private key to connect to the server, and hence can't automatically create the connection.How do I get Box A to automatically create a tunnel over a port to Box B, without any intervention from me, *prior* to any users logging in?
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Sep 17, 2010
I'm trying to run a script to execute the command
Code:
ssh -D port host
when my laptop connects to internet. I have placed the script in /etc/network/if-up.d/.The scripts is being run when it should, but the SSH-tunnel isn't created.I can however run the script manually, as root, and then the tunnel is created.
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Jun 15, 2010
Just give you the background:1) Let's call the two machines, Box A and Box B.2) OpenSSH is running on both machines.3) Key based authentication is setup between two users on these two machines, and both can login into the other with no problems at all.4) I'm also port tunnelling over SSH to encrypt some traffic between the two machines. (I did have the port tunnelling code here, but this forum won't let me post URL ).I can obviously then forward port 1000 on Box A to port 1000 on Box B, securely.However ... and this is my problem ... I want this port tunnelling connection to be automatic whenoot the machine, e.g. Presession" and "before" a user logs in.I tried adding the tunnel command to gdm/PreSession/Default, but the problem then is because the user is not *logged in* at this stage, it can't use the user's private key to connect to the server, and hence can't automatically create the connection.
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Nov 28, 2010
I'm trying to create EoIP interface on ubuntu so i can create a simple tunnel to my mikrotik router. Is there anyone know how or even done that? If EoIP is not possible, is there any other simple way?
I had already read and thought about doing it with OpenVPN, but when I read the community documentation for OpenVPN on ubuntu 10.10, I fear it won't connect the tunnel to mikrotik OpenVPN server, since OpenVPN on ubuntu uses 2 certificate and 2 key files(as i read on the docs), but mikrotik configuration, i can see only 1 certificate can be applied on. This confuses me and make me decide to use EoIP(but i can't find any tutorial/docs about it). I don't actually need the encryption and security, i just need to create a tunnel for ubuntu and mikrotik.
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Nov 26, 2010
I'm looking for a tutorial on how to create a simple pppd tunnel between two machines. I've found alot of tutorials about pppd over ssh (using the pty option) but for the purpose I just want a simple pppd tunnel.
Specs
host 1: lan ip 10.101.10.20 running slackware 13.0
host 2: lan ip 10.101.10.21 running slackware 13.1
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Mar 15, 2010
How to create a telnet server in ubuntu..?My students have unix Lab by next sem and so i would like to create telnet server so that they can access it from windows..
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Feb 17, 2010
I am getting this error when I try to bring up IPSec Tunnel.Starting connection with command /usr/sbin/ipsec auto --up 'paycode-to-vivacom' ..
104 "paycode-to-vivacom" #7: STATE_MAIN_I1: initiate
003 "paycode-to-vivacom" #7: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02_n] method set to=106
003 "paycode-to-vivacom" #7: ignoring Vendor ID payload [FRAGMENTATION c0000000]
[code]....
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Mar 12, 2010
I have a project that I'm working on now that is using Ubuntu 8.04LTS to create a reverse SSH proxy for a telnet process. We have the box logging in with RSA keys so that it can automatically connect to the SSH host on our end. We are using autossh to keep the connection up and running.
We have rolled out 3 of these and they are working very well. We ghosted the original, changed the hostname, changed the IP info, and regenerated the SSH keys. Now I need to clone 35 more. I want to try to do this as efficiently as possible and can script the changes in the hostname, IP, ect.
Can I batch create RSA keypairs on my workstation and then copy them over as a part of the batch? My current other option is to login to each of them and generate the pair. I would like to just install the drive and ship it and not even have to boot it up.
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Jun 9, 2010
I am using a PC to telnet into a Lucid Lynx Ubuntu system, and trying to record audio via a microphone which is connected to the Ubuntu system, and play it back on the PC. The microphone works when recording and playing directly on the Ubuntu system (so I know it's not hardware), but not when recording over the telnet connection. Playing other audio files does work over the telnet connection (so once again, I know it's not hardware), it's just the recording that doesn't work.
So basically it's just the audio-in over the telnet connection that Ubuntu isn't liking.
I tried removing PulseAudio (as I had a Fedora system that I had to do this with also, and that was the fix for that system), but apparently recording doesn't work at all in Ubuntu without it, as the microphone wouldn't work directly on the system anymore after in removed it. So I reinstalled it, but I am still stuck.
I cannot use any other programs to accomplish this - and I don't think I have to, I believe something is just messed up somewhere that is not allowing my microphone to pick up sound over the telnet connection, but I don't know what it is.
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Mar 2, 2010
I have an application that uses a telnet console, and I have an autostart script to start it (and check that it is running).The problem is that if the program is not startet by root, or by using sudo, I cant get access to the telnet console, it just says "connection refused".The application works fine, but I cant acces its console, so I have to shut it down, and then restart it with sudo to be able to log in to it.Anyone know how to make the script start the application with enough rights?
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Dec 16, 2010
Wrong prefix, its Ubuntu not Lubuntu. Three devices:
Laptop 1:
---Can ssh to any device.
---Accepts any internal ssh.
Desktop 1:
---Can ssh to any device.
---Accepts any internal ssh.
Desktop 2:
---Can ssh to any device.
---Can ssh to itself through localhost or 192.168.1.130.
---Any ssh(and telnet) aimed at this device times out.
All three devices recently had openssh-server installed yet only one seems deviant. I've been trying to ssh into desktop 2 to no avail, yes the machine is reachable, yes sshd is running, yes ufw is disabled, and no there is no external firewall that I know of. Anything else I can try? The router for the LAN being dd-wrt.
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Jul 8, 2011
I am facing an error when I run the following command telnet localhost 7777
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
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May 5, 2011
Is it possible to restrict telnet connection from remote to my server(linux -centos5)?
=================
Ex : [root@localhost]# telnet 10.0.0.33 80
Trying 10.0.0.33...
[code]...
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Jul 21, 2010
I want to create script wherein it will check the application if its running. The command that I'll be using to check the application is telnet (if you can recommend others, that's ok). I've an application and it is listening to port 1808. If I do telnet localhost 1808, the response is :
Code:
[root@test ~]# telnet localhost 1808
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
What I want to happen is if the response is like to code above, it will execute a commands. Obviously, above code knows that the application is not working so I need to execute a commands. I created a script before using expect but I don't think it will work because I haven't establish a shell yet unlike successful telnet I could spawn expect.
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Sep 24, 2011
Just setup my postfix and trying to telnet localhost.
here it is..
telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.
I wanna paste my /var/log/maillog but i don't know how, when i copy from putty screen it's only copied part of the log.
btw i found one similar problem here [URL] but the thread starter already lost the pastebin so i don't know how he resolved the problems.
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Jan 21, 2010
I am using inotify-tools in order to achive my task. inotify-tools has two commands inotifywait or inotifywatch. I am using inotifywait. I want to be able to extract unique paths that inotifywait will output and then take those unique file path run them through clamscan and quarantine the files if necessary. Here's what I have come up with so far.
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Feb 18, 2009
I am able to telnet to the server via a remote connection, but for some reason, it will not accept mail. ere is the bounce back email I am getting.Quote:This is the mail system at host smtp.mydomain.net.I'm sorry to have to inform you that your message could notbe delivered to one or more recipients. It's attached below.For further assistance, please send mail to postmaster.If you do so, please include this problem report. You candelete your own text from the attached returned message.The mail system
<root@mydomain.net>: temporary failure. Command output: pipe: fatal: pipe_command:
execvp /usr/bin/perlbin/vendor/spamc: No such file or directory
Reporting-MTA: dns; smtp.mydomain.net
[code]....
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Jan 12, 2010
I can telnet (while on the actual machine) using
Quote:
telnet localhost 25
When I try and use the local machine's ip
Quote:
telnet 192.168.100.9 25
I get
Quote:
Trying 192.168.100.9...
telnet: Unable to connect to remote host: Connection refused
[Code].....
This last one is strange as I the IP looks odd.
What I am doing wrong, and how do I fix it. After much surfing many mosts say that telnet is not used anymore but I want to use it to test my smtp server.
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Apr 22, 2010
I have my router configured so that it drops outgoing telnet connections (and other protocols I don't use). It's a 2wire gateway. 192.168.1.65 is the internal IP of my ubuntu box.I'm trying to figure out what normal network traffic looks like and whether I should be worried by this log entry. At the time this happened I was testing out TOR (just navigating to a few sites (dell, ubuntu forums, etc.) nothing all that interesting.)
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Jul 16, 2010
when i try a telnet to a host like that: telnet 10.10.10.10 1234 i got this: telnet: Unable to connect to remote host: Connection refused.
1/ does this mean that the problem is not due to a firewall, but that the host 10.10.10.10 doesn't listen on the port 1234? other way does this mean that my firewall is authorizing traffic on the port 1234?
and when i try a telnet on another port like that: telnet 10.10.10.10 1235 i get: Trying 10.10.10.10 ...
in this case this
2/ does this mean that the firewall is blocking the traffic between my host and the 10.10.10.10 on the port 1235?
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