Slackware4.0, Squid2.2S3 & SYN_RECV problem

Hi,

I have clean installed Linux - Slackware 4.0 (kernel 2.2.6) with
compiled
squid2.2stable3 on IntelMB SE440BX-2 w/ PIImmx/350MHz,
128MB RAM, 9GB Ultra2WD scsi HD connected to Internet
by 1 ethernet interface (3c900), no serial connections or modems.

Everything working for many users OK but time to time when
connecting ONE of users then proxy slow very very down
and all squid connections seems to be VERY slow.
After disconnecting of this user, everything
go normally up. I dont know if this is kernel or
squid problem or user problem (but in this case system
should have more imunity against it). In logfiles
found not interesting but "netstat -a" in this cases wrote
(among many others like ESTABLISHED, TIME_WAIT,...) also
many many (I count up to 129 !!!) same SYN_RECV lines about
this ONE user just like:
...
.....
tcp 0 0 ultra.applet.cz:www asy8-NJ.applet.cz:61360 SYN_RECV
tcp 0 0 ultra.applet.cz:www asy8-NJ.applet.cz:61361 SYN_RECV
tcp 0 0 ultra.applet.cz:www asy8-NJ.applet.cz:61367 SYN_RECV
tcp 0 0 ultra.applet.cz:www asy8-NJ.applet.cz:61359 SYN_RECV
tcp 0 0 ultra.applet.cz:www asy8-NJ.applet.cz:61361 SYN_RECV
tcp 0 0 ultra.applet.cz:www asy8-NJ.applet.cz:61360 SYN_RECV
tcp 0 0 ultra.applet.cz:www asy8-NJ.applet.cz:61357 SYN_RECV
tcp 0 0 ultra.applet.cz:www asy8-NJ.applet.cz:61362 SYN_RECV
tcp 0 0 ultra.applet.cz:www asy8-NJ.applet.cz:61363 SYN_RECV
...etc etc...
.....
Note that our squid is runing on port 80 (so here www not mean www
service).
After disconnecting of THIS ONE user, this big group of SYN_RECV lines
in netstat output go away and all is full working in normal speed.
This user is connecting his own network by dial-up to our Patton
over PPP w/ sw WinProxy (linked to our proxy of course).

Please help, some ideas?
How to do restrict this squid slow-down?

Pavel
Received on Fri Jun 04 1999 - 07:59:44 MDT