I disagree on your analysis.

IWETHEY v. 0.3.0 | TODO

1,095 registered users | 1 active user | 0 LpH | Statistics
Login | Create New User

Welcome to IWETHEY!

Post #202,956

by static

4/12/05 2:00:43 AM

I disagree on your analysis.

I think that sshd is holding onto state despite the network device vanishing. However, the down/up restores the network device long before sshd decides to discard the session. After all, an ifdown does make the device "not exist" as eth0: its IP address is not bindable, the routes are removed, etc etc.

It might also be the OS leaving the connection open *as far as the sshd process is concerned* although I'm sure it would get copious errors were it to try to use it whilst the device was disabled.

Wade.

Is it enough to love
Is it enough to breathe
Somebody rip my heart out
And leave me here to bleed

Is it enough to die
Somebody save my life
I'd rather be Anything but Ordinary
Please

-- "Anything but Ordinary" by Avril Lavigne.

Post #202,963

by pwhysall

4/12/05 5:07:53 AM

Re: I disagree on your analysis.

If sockets are open and working, then the interface ain't down.

Post #202,972

by broomberg

4/12/05 6:40:14 AM

This is how I handle the issue

I often will do "nohup /etc/init.d/network restart".
I lose my connection but the process keeps going due to the nohup.

Post #202,973

by pwhysall

4/12/05 7:01:21 AM

Ar, that's what I do

Of course, if summat breaks you're knackered, but hell, exercise is good for you.

Post #203,048

by folkert

4/12/05 3:05:54 PM

Nope, I disagree.

The interface goes down.

SSH server buffers the requests until it can get back through. As long as the tunnel construction hasn't failed it should still be there... It is sort of like pushing stop on your DVD once. When you remove and re-insert the DVD, the DVD Player starts exactly where left off.

It is the same idea, just implemented in Network protocol. Of course Timeouts apply with SSH but the DVD only fails when power has been removed.

No matter how much Microsoft supporters whine about how Linux and other operating systems have just as many bugs as their operating systems do, the bottom line is that the serious, gut-wrenching problems happen on Windows, not on Linux, not on Mac OS. -- [link|http://www.eweek.com/article2/0,1759,1622086,00.asp|source]

Post #204,039

by jake123

4/20/05 10:45:18 AM

It works like that with warp, too

I've done that particular trick on the box in the basement before.

--\n-------------------------------------------------------------------\n* Jack Troughton                            jake at consultron.ca *\n* [link|http://consultron.ca|http://consultron.ca]                   [link|irc://irc.ecomstation.ca|irc://irc.ecomstation.ca] *\n* Kingston Ontario Canada               [link|news://news.consultron.ca|news://news.consultron.ca] *\n-------------------------------------------------------------------

Note to self: don't type "ifdown eth0" over SSH. -NT - (FuManChu) - (12) - April 12, 2005, 12:27:17 AM EDT

ifdown eth0; ifup eth0 works. Over ssh. I've done that. -NT - (static) - (11) - April 12, 2005, 12:31:37 AM EDT

You weren't connected via eth0, then ;-) -NT - (pwhysall) - (10) - April 12, 2005, 12:40:48 AM EDT

Yes. Yes, I was. Actually, I've done it several times. - (static) - (8) - April 12, 2005, 12:43:05 AM EDT

I thought of that too late (worked for me in the past too) -NT - (FuManChu) - April 12, 2005, 12:45:38 AM EDT

On experimenting... - (pwhysall) - (6) - April 12, 2005, 12:55:17 AM EDT

I disagree on your analysis. - (static) - (5) - April 12, 2005, 02:00:43 AM EDT

Re: I disagree on your analysis. - (pwhysall) - (4) - April 12, 2005, 05:07:53 AM EDT

This is how I handle the issue - (broomberg) - (1) - April 12, 2005, 06:40:14 AM EDT

Ar, that's what I do - (pwhysall) - April 12, 2005, 07:01:21 AM EDT

Nope, I disagree. - (folkert) - (1) - April 12, 2005, 03:05:54 PM EDT

It works like that with warp, too - (jake123) - April 20, 2005, 10:45:18 AM EDT

I concur. I have done it many times. - (folkert) - April 12, 2005, 03:01:43 PM EDT

iwethey.org

Press F1 to continue, or F2 for setup.
52 ms