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To Whom It May Concern This system is coordinating an internet-wide survey of open TCP ports, service banners, SNMP system descriptions, MDNS responders, UPNP endpoints, and NetBIOS name queries. The results of this survey will be used to uncover systematic vulnerabilities in the equipment provided by ISPs to their customers. My goal is to collect this information, determine which ISPs are exposing their customers to internet-based attacks, and contact those ISPs with my findings. If you would like to have your network excluded from this scan, please send an email to admin@critical.io. Please include a list of netblocks or at the least the domain name or ASN that you would like excluded. If you are concerned about what an attacker can discover about your network using these types of probes, there are great free tools such as Metasploit and Nmap that can be used to gather this information on your own. - HD Moore Scan Source Addresses The following IP address list can be used to exclude probe traffic from alerts: 184.154.42.194 (critical.io) 69.175.126.170 (urchin.critical.io) 173.236.44.98 (crawler.critical.io) 69.175.54.106 (ping01.critical.io) 173.236.30.122 (ping02.critical.io) 96.127.150.218 (ping03.critical.io) Background Information One consistent problem with global network security is the lack of awareness prior to successful attacks. This is a challenge we typically offload to products - vulnerability assessment and penetration testing tools help clarify what we don't know, and network monitoring tools tell us what already happened. This approach is not perfect, but it helps address the most common cause of successful attacks: opportunity. The goal of this research project is to preempt opportunity by identifying wide-ranging security flaws at a global level before they are rolled into the next crimeware kit, bot, or attacker-controlled worm. The "good guys", even those using offensive tools such as Metasploit, are often weeks or months behind what the latest wave of opportunists leverage to catapult their impact from annoying to disastrous. If we spent half as much time on analysis and remediation as we did on monitoring, many of the challenges limiting secure computing would be solved. At the same time, without monitoring, we are unaware of what our foes are doing. Proactively identifying new instances of widespread flaws provides the knowledge (and often, the pressure), to solve these problems before they become another cog in the wheel of a crimeware empire. The justification for this project (and resources it costs to run it) is based squarely on precedent. A couple years ago, I conducted a similar scan to identify VxWorks-based equipment that exposed the remote debug service, with ridiculous results. The worst part of that project was realizing that based on DShield.org's data, someone else had quietly identified the same issue, scanned the internet at large, and never said a word. More recently I spent some time on the H.323 video
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