lkml.org 
[lkml]   [1998]   [Apr]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: SYN cookie reliability
Date
From
> SYN cookies do not seem to work on 2.1.95/96. I have not checked previous
> kernels for this problem.
>
> I set /proc/sys/net/ipv4/tcp_syncookies to 1. I enabled SYN cookies. I
> used synk on myself. The flooding gets through.

Of course it gets thru, but is the system (given TCP port)
unusable for simultaneous non-flood usage ?

Say you flood your TELNET port, can you still do:
telnet your.local.host
while the SYNK is hammering ?
If you can't, then SYN-cookies don't work.

> Attached are the program I used an the output of netstat after using it.
> IMHO, this is not a good thing. In fact, I feel you should set SYN cookies
> to the way they were in 2.0.33. At least they worked back then.
>
> | Fenestrae delendae sunt. |
> | smilax@mindmeld.dyn.ml.org |

/Matti Aarnio <matti.aarnio@tele.fi>

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu

\
 
 \ /
  Last update: 2005-03-22 13:42    [W:0.031 / U:0.372 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site