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IP Blacklisted ! Please Help Help

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  • IP Blacklisted ! Please Help Help

    We have more than 100 PCs all networked and we are using Windows server 2003 Small Business Edition and Exchange email.But we are facing a new problem this days , being blacklisted several times by Spamhaus because our IP is infected (or NATting for a computer that is infected) with the bobax spambot.
    So please help me on how i can easily find the infected PC in a centralized or by going PC by PC way .
    With Regards
    Eyoel.

  • #2
    Re: IP Blacklisted ! Please Help Help

    First you will have other problems if you have 100 PCs on SBS -- it has a hard limit of 75 licenses.

    What AV solution do you use? Does it have a central management console?
    Ditto spyware/malware?

    IMHO, unless you can manage both centrally, do an organised sweep / physical check of the PCs with your AV and a product like Malwarebytes.

    While you are at it, set your router to block port 25 outbound from every internal IP address except your exchange server (and inbound only to your exchange server). Also test your Exchange server is not an open relay.
    Tom Jones
    MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
    PhD, MSc, FIAP, MIITT
    IT Trainer / Consultant
    Ossian Ltd
    Scotland

    ** Remember to give credit where credit is due and leave reputation points where appropriate **

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