Ubuntu :: Number Of Connections Per User (Command And Log)?
Jun 4, 2010
I have Ubuntu 9.04 and I would like to know what is the command to find out the number of connections per user (i.e. ssh) and also what syslog module do I need to modify and how to enable it in order to have it logged, thing is I need to generate this event in order to see it in RSA enVision, I've tried with "who" but nothing is displayed, do I need to program something besides that? or what can I do? to have no. of connections and have that logged so I can see the event in enVision.
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Sep 14, 2010
Can I restrict the number of ssh connections to my Linux box - by username or by ip or both?
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Feb 3, 2011
How do I find the maximum number of concurrent connections (in any state)? I'm running RHEL5 2.6.18-194.26.1.el5. Also, does tcp auto tune affect the number of concurrent connections or is it mostly used for dynamic buffer size allocation?
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Dec 13, 2010
Dist: Fedora 14
SSHD: OpenSSH 5.5p1
I need to limit the number of ssh connections a user has. All the users are using tunnel only so their shell is set to /sbin/nologin The logins do not open a shell they just create the tunnel so /etc/security/limits.conf has no effect on them at all.
I tried setting 'MaxSessions 1' in sshd_config but either that doesn't not do what I expect it to or it plain does not work as even with a normal user I was able to open an unlimited number of sessions. I need a good secure way to limit each user to 1 ssh session without them having a shell but Im unable to find a solution.
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Jan 27, 2010
Can I restrict the number of ssh connections to my Linux box - by username or by ip or both?
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Nov 9, 2010
if i want user should`t have more than 20 sftp connections to a server,is there any way we can limit no.of connections to a particular user on the server using ssh configuration
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Jan 24, 2011
i've got a select based application that wants to support a large number of mostly idle connections. the code is java and works on windows, suse enterprise linux, mac os x. it does not work on centos 5.5 (32-bit, 2.6.18 kernel, 1G of memory).
i've read and followed the directions in various articles about tuning linux for large numbers of connections (including the C10K problem), and gotten the number of sockets up to 3200.
these didn't make any apparent difference:
[URL]
on windows, i can get up to around 78,000.
on suse enterprise linux (a few years ago), i got up to 90,000. that's where i got bored and stopped.
on my mac laptop with os x (snow leopard), i got up to 10,500.
i have used ulimit -n 10240
my current goal is 10k sockets.
the test is that i'm opening one socket at a time until it fails. when it fails, many of the sockets which have already been opened also fail, in one giant cascade. sounds like a buffer / memory problem.
each group of 64 sockets gets a thread to manage select calls for them. thus i'm only using around 61 threads total when it fails.
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Sep 5, 2010
How to number of connections for a single ip on port 80 to CentOS 5.5 with iptables? connlimit did not work on CentOS and nginx does not provide a module for that
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Jul 28, 2010
except is there is a way to enhance mod_limitipconn.c to ensure that apart from restricting one connection allowed from a given IP, also set so that an IP can only connect on every set interval ?e.g.restrict the number of connections from a given source IP to say once every 5 minutes or so?if not mod_limitipconn.c, any other mechanism to do the expected result?
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Feb 7, 2011
have a problem with my network-manager in ubuntu 10.10.when I dial one of my vpn connections, my other vpn connections be disabled and I can't use them!I tried to restart network-manager and gnome-panel, but it does't seem to solve this problem.
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Aug 24, 2015
I am trying to add an OpenVPN connection from the Network Connections GUI. The problem is everything is greyed out when I am logged on as a user. When I log in the GUI as root I can create the OpenVPN connection no problems. The problem with that is the option to use my newly created VPN connect does not appear when I log back into my user. I have tried adding my user into the sudoers file to no avail.
How can I give my user privileges to add OpenVPN connections?
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Apr 3, 2011
I want to limit the amount of connections a user can make outside of the box per user group, should I be doing this via iptables or what? aka:
group1 can only have 2 simultaneous outbound connections
group2 can only have 8
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Feb 20, 2010
I want to use a cron job to backup my files to my server. Now when I run the script manually, I get an error when backing up (something and sftp file being used or so). I only get this when I'm simultaneously connected to my server with sftp. So to be sure that this doesnt happen when I wont be there anymore to look at the log, I would like to know if there is a command to kill all sftp connections. I would put this command in the backup scrip cron uses.
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Apr 16, 2011
I am trying to write a shell script that will block any outgoing Internet connection, focusing mainly on the HTTP connections.
It would be nice if this command could work on both Mac OSX and Linux.
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May 3, 2011
I ran into a user today that indicated that their company only allows them to log in through a terminal session once (no multiple logins). On second try their login window terminates. They are using putty.Is this being accomplished through PAM or sshd ( or some other method)?
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Feb 18, 2010
What is the user account number when you create a root user account for the system during the installation of any linux distribution? I'm not sure if its 0, 1, 10, or 100..
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Jul 16, 2011
Just wonder is there any command that blocks all connections?
I am aware about RedHat #sudo /sbin/services iptables panic
and wonder is there something with similar effect in opensuse?
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Feb 22, 2010
What is the command to check all open TCP connections?
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Jul 21, 2010
I'm trying to write a small script that will run as root, but launch a command with sudo as another user. I want that user to be whichever user is active user. That is, the user that is using GDM right now, or the one that is logged into the current console. (by current console, I don't mean the user running the script, but rather the user logged into the console currently displayed on the screen.)How can this be done?
Code:
ACTIVE_USER=`somecommand`
test `id -u pulse` -ge 1000 && sudo -u $ACTIVE_USER $*
What can I use for "somecommand"?
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Apr 3, 2011
I have just created a usb boot disk so that I can install Fedora 14.I used the following which was successfully. However, I am left wondering what does the bs parameter actually does. I know it mean bytes and copies these at a time. But how do I know what to set it to?dd if=F14-Live-i686.iso of=/dev/sdb bs=8MIn the above example it is set to 8MB. However could I set this to any value that I want?
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Mar 6, 2011
I'm trying to get the end result to have the same format as this as well:
1 bin
2 daemon
67 erozner
[code]....
Where the numbers are the number of processes being run by the user (the name right next to it).if I input the command egrep myFile into the terminal, it should look for every line with the letter x in myFile, right?
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Jan 25, 2011
If I only want to let a user be able to login via telnet a max number of times equal to 2 how would I go about doing this?I have found this little tid bit:per_source = 2but that only allows 2 connections from the same source (i.e. network) and that would not work. For some reason our telnet sessions are not dying off after a user has shutdown their PC and then the next time they login it adds another telnet session.
1. user1 31300 /dev/pts/409
2. user1 27539 /dev/pts/539
3. user1 18042 /dev/pts/316
[code]....
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Aug 21, 2010
I'm writing a user ranking module for a site. This ranking depends on some criterias and it's possible to set or unset any one of these criterias in order to consider them in calculating the user rank or not. And here's the way I've implemented the ranking calculation :
when I set one or more of the criterias to be considered in ranking , for each user in the system I insert one record for each criteria , for example : if I have 2 criterias and both are set and consider that I have two users , I'll have :
Ranking table
--------------
username | criteria | to_be_added | score
--------------------------------------------------
user1 | criteria1 | 1 | 0
[code]....
It means I just set the to_be_added field to 1 for all of them and leave the calculation of score for each criteria for each user to the time the user logins so that to prevent doing all these calculations at once , because there are a huge number of users ... But there is one problem , if I want to show for example the best user (based on the highest score) , the result can't always be true because some users might not logged in at that time and their score might be zero .
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Apr 13, 2011
I'm trying to write a bash script with a for loop that will perform two tasks a number of times depending on the number the user enters at the start. Here is what I got so far. It works fine the first time but then it just exits with no error msgs. The problem is in the way I have written the loop command. I have searched the web for examples to find out what I'm doing wrong with no luck.
#!/bin/bash
declare -i Num=1
declare -i Strnum=8
[code]....
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Feb 18, 2011
i want to write shell script that give a number between 1-3444 from user and if user enter out of range number give error e.g number must between
read -p "plz Enter Number " p
while [ $p != [1-9] -o $p != [1-9][0-9] -o $p != [1-3][0-4][0-4][0-4] ]
do
read -p "plz Enter Valid Number" p
done
but this have an error in while statement ! two many argument
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Apr 28, 2011
Is there an ssh or sshd parameter that can be set to block out a user after a set number of attempts tp login ?
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Nov 7, 2010
What is a Linux command that I can run to programmatically return either 32 or 64 to indicate whether the processor is a 32 bit or 64 bit processor?
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Feb 15, 2010
How can I know how many shells my system support (Is there any specific command)?
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Jun 8, 2011
IS there any command to see number of threads are running in a process .I have check ps -eLf but it wont show display for all the threads
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Sep 21, 2010
Is there any command in linux to figure out , given a process, which processor the process is running? I am interested in figuring out the CPU busy and CPU idle time of that processor.
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