First off, I would turn logging on so you can see what is doing what. This should help you trace it. Also ensure that your anti-virus is up to date and all patches installed. -- David Richards Network Administrator Eurosoft (UK) Ltd 3 St. Stephen's Road Bournemouth, Dorset BH2 6JL United Kingdom Tel: +44 (0)1202 297315 Fax: +44 (0)1202 558280 Mobile: +44 (0)7725514869 http://www.eurosoft-uk.com ======================================= Increase computer reliability today! Eurosoft diagnostic software tests and validates all brands of PCs during manufacturing and servicing. Guaranteed immediate service cost savings! ======================================= Nobody checks out PCs better than Eurosoft! -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of samuel dinakar sama Sent: 07 August 2008 12:23 To: General Red Hat Linux discussion list Subject: IP Black listing problem HI all, Straight to the problem I am facing in my organization. I am maintaining mail server Sendmail (fedora) .we have a recurring problem , Public IP (internet gateway s/m) is getting black listed because of Spam.. I couldn't trace anything , How Trojan spam generated ? How to provide the security ? For this problem I have been changing the public IP , but it not a solution .. The below message is thrown by CBL.abuse.org for black listing : *ATTENTION: **This IP is infected with, or NATting for a computer infected with a high volume spam sending trojan - it is participating in a botnet. * *This is the Srizbi BOT * *You need to patch your system and then fix/remove the trojan. Do this before delisting, or you're most likely to be listed again almost immediately. * *If this IP is a NAT firewall/gateway, you MUST configure the NAT to prevent outbound port 25 connections to the Internet except from your real mail servers. * Any suggestion for me to give in IPtables or selinux. Your suggestions or any input for this problem is very much appreciated. Thanks & Regards, *Samuel* -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
