Sendmail has some protection in terms of load limiting, these are a bit high so you can set them lower so the server recovers sooner. This will save your server but in effect it allows DoS sooner. Possibly you do not understand what a DoS is. DoS is a function of your attacker overloading your network or server's capacity to handle network traffic sent at it. These days unless you are a big organisation with huge pipes, big multiple servers and deep pockets, and someone wants you dead, your dead. If someone wants to take your server out they can, it is simply a matter of logistics, they control 30 or 300 or 3000 or 30000 spam drones of hacked broadband connections and the volume these generate is amazing. I was Dos'd a while back, I was sent 5+gig of volume in 2~3 minutes, my 512k cable modem could not cope so in effect the DoS happened at the ISP's end of my pipe, totally outside of my control. Modern machines, even desktop ones should be able to handle a lot of mail, if you are having issues with DoS's then maybe it is something else. Regards Thing -----Original Message----- From: Devon Harding [mailto:devonharding@xxxxxxxxx] Sent: Wednesday, 2 November 2005 10:43 a.m. To: General Red Hat Linux discussion list Subject: Protect sendmail from DoS How can I protect my sendmail server against DoS attacks? -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=subscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
