ssh question: KeepAlive setting?
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From: Kenny McCormack on 23 May 2010 16:52 I have an ssh connection that times out on inactivity. I want to put something in the connection to generate a bit of "noise" on the connection every so often. I seem to remember having done this in the past but don't remember how I did it. Can someone help? Notes: 1) Don't bother telling me I shouldn't do this. That will be sent to /dev/null. 2) I did "man ssh" and "man ssh_config" searching for the word "keep" - and found a few hits ("ServerAliveCountMax", "TCPKeepAlive", "ServerAliveInterval", etc), but none of these seem right. In particular, these options all seem to default to "on" or "yes", yet the problem still obtains. 3) I'm pretty sure there is (or was) some option that you set to a numeric value (e.g., 60), that caused it to send something across every X seconds (e.g., every 60 seconds). -- > No, I haven't, that's why I'm asking questions. If you won't help me, > why don't you just go find your lost manhood elsewhere. CLC in a nutshell.
From: pk on 23 May 2010 16:56 Kenny McCormack wrote: > I have an ssh connection that times out on inactivity. I want to put > something in the connection to generate a bit of "noise" on the > connection every so often. I seem to remember having done this in the > past > but don't remember how I did it. Can someone help? > > Notes: > 1) Don't bother telling me I shouldn't do this. That will be sent to > /dev/null. Why do you think people have it in for you? (SCNR) > 2) I did "man ssh" and "man ssh_config" searching for the word > "keep" - > and found a few hits ("ServerAliveCountMax", "TCPKeepAlive", > "ServerAliveInterval", etc), but none of these seem right. In > particular, these options all seem to default to "on" or "yes", yet > the problem still obtains. ServerAliveInterval Sets a timeout interval in seconds after which if no data has been received from the server, ssh(1) will send a message through the encrypted channel to request a response from the server. The default is 0, indicating that these messages will not be sent to the server. This option applies to protocol version 2 only. Doesn't seem to be on by default. > 3) I'm pretty sure there is (or was) some option that you set to a > numeric value (e.g., 60), that caused it to send something across > every X seconds (e.g., every 60 seconds). I used to set the above option to 30 seconds. The actual value you use depends on how long it takes to your firewall to shut down an inactive session. You may also want to set ClientAliveInterval on the server, if possible. Please also note that, while using ServerAliveInterval made things much better for me, I still had (and have) cases of idle SSH sessions dying despite the keepalive.
From: Owen on 24 May 2010 01:08 On May 24, 6:52 am, gaze...(a)shell.xmission.com (Kenny McCormack) wrote: > I have an ssh connection that times out on inactivity. I want to put > something in the connection to generate a bit of "noise" on the > connection every so often. I seem to remember having done this in the past > but don't remember how I did it. Can someone help? > > Notes: > 1) Don't bother telling me I shouldn't do this. That will be sent to /dev/null. > 2) I did "man ssh" and "man ssh_config" searching for the word "keep" - > and found a few hits ("ServerAliveCountMax", "TCPKeepAlive", > "ServerAliveInterval", etc), but none of these seem right. In > particular, these options all seem to default to "on" or "yes", yet > the problem still obtains. > 3) I'm pretty sure there is (or was) some option that you set to a > numeric value (e.g., 60), that caused it to send something across > every X seconds (e.g., every 60 seconds). > > -- > > > No, I haven't, that's why I'm asking questions. If you won't help me, > > why don't you just go find your lost manhood elsewhere. > > CLC in a nutshell. In /etc/ssh/ssh_config, I have added the line ServerAliveInterval 120 Owen
From: Kenny McCormack on 25 May 2010 08:18
In article <18a3380b-6d62-4301-96b2-a7a0e07ac458(a)y18g2000prn.googlegroups.com>, Owen <xemoth(a)gmail.com> wrote: .... >In /etc/ssh/ssh_config, I have added the line > > ServerAliveInterval 120 We have a winner! Thanks. You have to admit that the docs are unclear - seems like there are lots of options (to read through) to get at one simple concept. Anyway, as I said, I knew I had figured this out before, but this time it wasn't so obvious (to me, anyway). -- (This discussion group is about C, ...) Wrong. It is only OCCASIONALLY a discussion group about C; mostly, like most "discussion" groups, it is off-topic Rorsharch [sic] revelations of the childhood traumas of the participants... |