sandiphw wrote:
Thank you all for valuable assistance. I am working in a corporate
environment. squid is installed on linux server and all these desktops/
laptops (Windows) generating these logs are through samba client. These
thing happens very recently and request are coming from hundreds of clients.
We have not installed any new software to any client machine.

Somebody did something to them ...

Does not have to be new software to be broken either.


Anyhow, I shall try to build a syslog server, but it may takes time due to
my limited knowledge. If you can advise me how to fix log sizes through
squid configuration, it will give me a temporary relief.

Regards,

SKS

A syslog server may face the same problem. Along with lost information as the network floods with additional GB of UDP packets containing log information. If the network reaches flood levels important log lines indicating problems may be lost.

 ** You ** NEED ** to ** FIX ** the ** clients ***

The fact that you say nothing changed on the clients is ringing a huge warning bell for me.

Windows machines which have _actually_ not been changed but suddenly start a DoS with new traffic is good sign of infections underway.

The partial-domain makes me think it the DNS settings in your network, or a configuration update pushed out to the client machines is not quite right.


Depending on your squid you may be able to use ACL matching domain "ab-desktop" on the access_log to reduce the recorded traffic logged. That will prevent you locating a suitable client to try fixing though.

Amos
--
Please be using
  Current Stable Squid 2.7.STABLE7 or 3.0.STABLE19
  Current Beta Squid 3.1.0.13

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