Security :: Restrict Telnet Session To Users ?

Oct 22, 2009

I want restrict telnet session to users.

That means the client login one user at a time. not multiple login.

For example:

I want restrict this. How to restrict one user to use multiple login.

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SUSE :: Restrict Users Open Session Via XDMCP - Xmings XLaunch - From Windows PC

Feb 17, 2010

I have one Linux PC installed with Suse 11.1. In this I have created three users to get access.

Users able access their login from Windows PC via some utilities.
1. Putty
2. Xming

Users able login using both. With Putty there is no GUI. But with Xmings XLaunch they are able to get similar session as Linux Host PC. At this point of time the host linux PC will become too slow in perfarmance.

How to retrict the users not to open similar session by enablin/disabling some setting in Linux PC?

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Ubuntu Security :: Restrict Users In 9 ?

Apr 14, 2010

I've installed Ubuntu Desktop Ed 9 and I want to add a user account that would be very restricted. I would only want them to access the internet and run several programs. I do not want them to have access to the destkop, anything under preferences, administration etc... Is this possible?

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Fedora Security :: Restrict POP3 Or IMAP For Particular Users?

Oct 30, 2009

Is it possible in Linux to restrict POP3 or IMAP for particular users.I need a confirmation on this, that it is possible or not in Linux.

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Ubuntu Security :: Restrict Users Password Changing To Themself

May 11, 2010

I want the users to access servers via ssh public key only. By default they don't know their initial password and do need to change that when performing administrative tasks.For changing their passwords without knowing the old they need to switch to root for this special case.The only case it seems I don't have control is that users can not only change their password but also the password of other peoples. Does someone sees a solution (without apparmor/selinux and special /usr/bin/ to restrict users to only change their password?I miss the feature of using environment variables in sudoers file.

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Security :: Having Multiple Users For One Session?

Oct 12, 2010

is that possible to have multiple users for one linux session? and how can i do that ? it's possible to creat virtual users for a session ?

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Slackware :: Script - Telnet Session Is Opened And Then Some More Commands Are Forwarded To That Session?

Apr 12, 2010

hypothetically speaking, can i write a script in which a telnet session is opened and then some more commands are forwarded to that session?

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Ubuntu Servers :: Restrict User Session Numbers And Allow Resuming Previous User Session?

Jun 30, 2010

I am currently in a project to set up an LTSP server with 10 thin clients. I am using Ubuntu 9.10 (Karmic).

Installing server and booting clients are working fine. Now, according to the need, I have to restrict user session numbers and allow resuming previous user session.

I have achieved to do the first one, but still could not able to setup the second one. As per requirement, if some thin can have power failure, the same session should be restored back. I am confused here, if I need to focus on saving xsessions or saving gnome sessions. I am looking for a concrete solution as I am running out of time.

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Server :: Restrict Remote Telnet Connection + Port 80?

May 5, 2011

Is it possible to restrict telnet connection from remote to my server(linux -centos5)?

Ex : [root@localhost]# telnet 80


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Ubuntu :: Telnet Session Hanging On 9.04?

Apr 25, 2010

I am running Ubuntu 9.04 on a wireless networked host machine. The wireless NIC is usb based. Its running inetd for network based servers (telnet, ftp etc).For some reason telnet, ssh or any application specific connection, hangs for a few seconds and then comes back. This happens after every few minutes. I do not loose any sessions or any data flowing across but it is sort of very annoying.It is a dual boot machine and I have also got Windows XP 64-bit. When am running on windows this does not happen, hence am not sure if it is something to do with the wirless nic or something else

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Programming :: Telnet- How To Restart Session

Apr 23, 2011

I have done some tcp stream multiplexer. I'm using it as independent login proxy (user is once authenticated and then switched to hidden device (cisco)). But I need to reset session (no connection) configuration, because cisco supports xterm, ctr-c, etc... Am I able to do? Just restart negotiation? Using IAC codes?

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General :: Iptables Restrict Ssh Session By Mac Address?

May 24, 2011

I'm in the process of restricting access to my Linux production box, where ssh access needs to be limited to only a few MAC addresses.I've followed the instructions outlined in this guide and ran the following two commands:

/sbin/iptables -A INPUT -m mac --mac-source XX:XX:XX:XX:XX:XX -j DROP
/sbin/iptables -A INPUT -p tcp --destination-port 22 -m mac --mac-source XX:XX:XX:XX:XX:XX -j ACCEPT
root@xxxx:~/#: iptables --list


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Fedora :: Using Lxterminal To Connect To A Telnet Session On Another *nix Box

Jun 22, 2011

I am using lxterminal to connect to a telnet session on another *nix box.

After I connect, I always have to enter the command

export TERM=xterm

is there anyway to automate this?

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Ubuntu :: Can't Spawn Telnet Session In Expect Script

Apr 22, 2010

I am moving my migration forward and am trying to get my expect scripts tested and found one that no longer works. Quite simply, it spawns a telnet session to a router.

set env(TERM) vt100
set timeout 3
set send_human {.1 .3 1 .05 2}
set timeout -1
spawn telnet

and that's it. The result of the script is that the command to spawn simply shows up on the screen like it is a puts command. On my older openSUSE system, it worked fine. I am running Ubuntu v9.10 desktop, and expect and its libs are patched to the latest rev, expect is 5.43.0.

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General :: Command Line To Open A Second Telnet Session ?

Mar 15, 2010

On my ubuntu 9.10 pc i am not running a GUI.

Every thing is run from command line.

How do i start a second telnet session from command line.

Plus can i have 4 telnet session open and move from one to the next and back again.

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General :: Telnet Session Timout Settings In Redhat 5?

Feb 22, 2010

where to set the telnet session timeout for the IDLE time in redhat linux.

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Software :: Process Running Even After Telnet Session Has Been Deliberately Ended?

Mar 28, 2011

I have ubuntu 10.04 & I telnet to windows vista. Even if I create a hidden process [URL].. from batch file . It seems the process gets killed when I end connection at port 23 to host. Maybe , the hidden process created is still child of current telnet session so tree is killed as session ends. Is there a way to keep process running even after telnet session has ended ?

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Ubuntu :: How To Restrict Users Area

May 3, 2011

I was just wondering how do i restrict someone from entering other files. Like other peoples files & the system files. My users are in /home/. I am running ubuntu 10.10.So how do i restrict access to other folders. Because i dont want other people looking inside others files or messing up my linux files.

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CentOS 5 :: Restrict Users To There /home Dir

Dec 16, 2010

How would i go about restricting users to there home dir in sftp and in ssh so that they can not go poking about other dir and files thats above there home dir ?Operating systemCentOS Linux 5.4 Kernel and CPULinux 2.6.18-194.8.1.el5.028stab070.5PAE on i686
Also it will have to be a low resource usage as i dont have much memory on it

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Server :: Restrict FTP Users From Accessing 1 Folder Only

Jul 1, 2010

I'd like to restricting my ftp users to access 1 particular folder.

we have a root folder called /home everyone has aces to that so they can operate.

but then there is /home/config how can i restrict certain users from access /config folder, since this is containing sensitive files I would like for no one else but my self to be able to access it.

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Server :: Sendmail: Restrict Access Between Users?

Mar 16, 2011

How to prevent a user sending a mail to a particular user in an intranet mail server?I tried with /etc/mail/access file but could not.

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Software :: Shell Script Commands To Automate Server Or Host Telnet Login Session?

Feb 7, 2010

finally i found the script for telnet automated login session...<<Mod edit: questionable link removed>>

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Programming :: TCL Expect Script That Spawns A Telnet Session To A Nortel - Response In Expect_out Is Not Consistent

Dec 2, 2010

I have a TCL expect script that spawns a telnet session to a Nortel DMS100 to execute some commands. The strange thing is that the response in expect_out is not consistent. It sometimes contains a extra enter or newline. This results in differences in the expect out buffer. Here is a part of the script:

send "time
sleep 1
expect -re ">"


This command displays the time. The correct output should be (with log_user=1):

Time is 11:44:04

But sometimes the output is:

>timeTime is 11:45:04

As you can see here the is missing on the command that expect sends , or at least in the echo that is comming back. I use a split command to filter out the response in the expect_out buffer, but this fails when the is missing. Here is a example with the debug enabled:


I suspect it has something to do with a slow response of the switch. I tried to send the time command slow and with the send_human but the result is the same. A timeout between the send and expect also doesn't help.

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Debian :: Restrict FTP Users To Home Folders (chroot)?

Feb 11, 2010

I have a debian-based ftp server running that I have created a few user accounts on. I will have clients uploading files to the server via ftp soon, and I need a way to restrict their access to only their home folders. I am not familiar with chroot, but from what I read, it can be used to restrict a user to their home folder, and that sounds perfect. How can I do this?

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Ubuntu :: Using Sudo To Restrict Users For Accessing Directories?

Jun 20, 2011

Is it possible to restrict users with 'sudo' from accessing certain directories? Rather than just exclude cd and ls from the sudo privileges, that is.

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Ubuntu Servers :: Restrict Users To Only SSH Tunnel - No Shell?

Jul 21, 2011

I have an Ubuntu 11.04 instance running on Amazon EC2. I am currently using it as an SSH tunnel/SOCKS proxy. Most of my Net activity is on a Windows 7 machine running PuTTY. This setup is working very well. So well that a few of my friends have expressed interest in accessing it. Question is, how do I share this proxy, without giving away my private key and root access? I would like to limit users to only being able to set up an SSH tunnel/SOCKS proxy, with no shell access. What other security measures would you recommend for such a setup? I googled a bit and saw references to rbash and chroot. I have already changed the SSH port, and set the EC2 firewall to allow inbound SSH only from my ISP's address range. My friends use the same ISP. They would probably be running Windows 7/Vista, and PuTTY too.

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Red Hat / Fedora :: Restrict Users From Bypassing Squid Proxy?

May 26, 2010

I am not sure whether it's possible or not. We running squid proxy server for our office. We restrict users using ACL to access the internet. There is some who do the followings:

1. Create a own proxy in there box who has the internet access.

2. Other users use those box as proxy and access to the internet.

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General :: Restrict Users To Send Mail To Outside Domains

May 28, 2011

How to restrict users to send mail to outside domains in qmail server, i have centos and qmail installed

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Software :: Sendmail Want To Restrict Some Users From Sending Mail Outside

Apr 22, 2010

I want to know is it possible in Sendmail to restrict some users from sending / receiving mail to / from outside world i.e. they should be able to send and receive mails only from local domain.

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Ubuntu Servers :: Restrict Users From Uploading Certain File Types?

Apr 30, 2010

I have Ubuntu Server 9.10 running with vsftpd and I want to restrict users from uploading certain file types (.exe, .avi) ect.. Is this possible?

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