Re: weird tcp syn problem
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On Thursday 09 August 2001 08:09 am, Peter Billson wrote:
> I'm sure you have already tried all this but:
> > echo > /proc/sys/net/ipv4/tcp_syncookies
>
> That should be echo "1" > /proc/sys/net/ipv4/tcp_syncookies
>
> > However, after fruitlessly trying to echo /anything/
>
> Does /proc/sys/net/ipv4/tcp_suncookies exist? It should.
>
> > got corrupt. So, I recompiled the kernel
>
> You need to turn Syn Cookies on during kernel configuration. Your
> /usr/src/linux/.config should show: CONFIG_SYN_COOKIES=y
>
> Also be sure that if you are using iptables that you DO NOT have
> ipchains support compiled in your kernel also. The config utility will
> let you do this (this really should be reported as a bug) but things
> will break and weird things will happen if you do this.
>
> Pete
Okay, this is bloody weird. It wasn't turned on. HOWEVER, and I'm only
shouting to stress this, I've been using this box with the 2.4.4 kernel for
*months*. And I just went back and looked at the source tree, and it also
didn't have SYN defined. So now I'm just confused, as opposed to being lost
and confused :-) Oh, well. It's recompiling right now, and that will
hopefully fix it. I'll chalk this up to human error (much more believable
that I screwed up somewhere than the alternative) and move on. Thanks
tons....
- --
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dbishop@micron.com
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