[CLUG] No buffer space available

[Gerard Hooton]

Is my machine telling the lan that it is a router/gateway ?
If so can I stop that? 



-----Original Message-----
From: Gerard Hooton <g.hooton at ucc.ie>
Reply-To: g.hooton at ucc.ie
To: Ronan Kirby <ronan at kirby.ie>
Cc: CLUG <cork at linux.ie>
Subject: Re: [CLUG] No buffer space available
Date: Tue, 10 Mar 2009 16:56:59 +0000
Mailer: Evolution 2.22.3.1 

Ok I have discovered that with net.ipv4.ip_forward = 1 my apr table
starts to grow and grow and I think I get an arp table overflow

When I do net.ipv4.ip_forward = 0 the arp table reduces to a normal size




//Ger



-----Original Message-----
From: Gerard Hooton <g.hooton at ucc.ie>
Reply-To: g.hooton at ucc.ie
To: Ronan Kirby <ronan at kirby.ie>
Cc: CLUG <cork at linux.ie>
Subject: Re: [CLUG] No buffer space available
Date: Tue, 10 Mar 2009 15:54:11 +0000
Mailer: Evolution 2.22.3.1 

Thanks Ronan,

I was working with /etc/sysctl.conf
to try and get net.ipv4.ip_forward = 1
In the end I reinstalled, it was quicker!

The other thing is I cannot get the system
to do do IP forwarding.

How can I tell if my kernel (2.6.24-1-686) has this enabled ?

//Ger




-----Original Message-----
From: Ronan Kirby <ronan at kirby.ie>
To: Gerard Hooton <g.hooton at ucc.ie>
Cc: CLUG <cork at linux.ie>
Subject: Re: [CLUG] No buffer space available
Date: Mon, 9 Mar 2009 15:01:07 +0000 (GMT)

Hi Gerard,

Wow - you know how to pick 'em don't you...

> ssh: connect to host xxxx port 22: No buffer space available

This can me there really is no memory when it's trying to create the 
socket, but of course we know there is.

So it's more likely someone has screwed with the sysctls and/or security 
& you are being denied the space.

Maybe back out all those OpenSSL patches which were recently needed, when 
they discovered it could be compromised - hehehehe *grin*

<shameless plug>
Use RHEL.
</shameless plug>

:-)

- Ronan
-- 
Gerard Hooton.
Department of Microelectronic Engineering U.C.C.
Butler Building,
Enterprise Centre,
North Mall.
Cork.

Tel: +353 21 4904576
Fax: +353 21 4904573
http://www.ue.ucc.ie/