Re: Scanning Class A network

From: Justin (justinvinn_at_gmail.com)
Date: 10/24/05

  • Next message: robert_at_dyadsecurity.com: "Re: Blocking Port scans" 
    Date: Mon, 24 Oct 2005 14:10:04 -0400
To: "tarunthenut@gmail.com" <tarunthenut@gmail.com>

    tarunthenut,

    Well, for the TCP portscans, if you have a *nix system avalible, I'd
    recommend you look at scanrand. You can get it from
    http://www.doxpara.com . Scanrand is a stateless TCP portscanner (yes,
    I know that sounds wierd). It's pretty fast, and I think will suit
    your needs.

    peace,
    --Justin

    On 24 Oct 2005 12:33:05 -0000, tarunthenut@gmail.com
    <tarunthenut@gmail.com> wrote:
    > Hello All,
    > Recently I was given a task to carry out a port scan of an entire valid
    > Class A range (Dont ask me what the huge pool of valid IP's was for :) ).
    > The scan needed to be carried out externally, and not from within the
    > network to identify hosts and ports exposed to the Internet.
    > The problem compounded cause of the following limitations :
    > 1. ICMP was not allowed in the network
    > 2. The IP range was to be scanned every month for the entire port range fro=
    > m
    > 1-65535 for TCP & UDP
    > After searching for a suitable scanner which could scan such a large range
    > in reasonable time, I could think of only nmap, nessus, superscan and ISS.
    > But because of the limitations stated above,all the tools took a huge
    > amount of time (ran into month).
    > I have struggled with options within the tools, tried configurable
    > parameters (host time out, parallelism, RTT etc) and divided into smaller
    > class C networks and scanned.but still the scan seems to take ages even if
    > it is
    > Any advise would be welcome :)
    >
    > Cheers
    > tarunthenut
    >
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