Security Basics
Re: nmap -p syntax question Sep 20 2013 03:06AM
ToddAndMargo (ToddAndMargo zoho com)
On 09/18/2013 01:37 AM, Anshuman Mukherjee wrote:
> From the Nmap Man Page:
> The S you asked for must be
> â??SCTP (
> â??)â??
> In addition to all of the scan methods discussed previously,
> Nmap offers options for specifying which ports are scanned and whether
> the scan order is
> randomized or sequential. By default, Nmap scans the most common
> 1,000 ports for each protocol.
> -p port ranges (Only scan specified ports) .
> This option specifies which ports you want to scan and
> overrides the default. Individual port numbers are OK, as are ranges
> separated by a hyphen (e.g.
> 1-1023). The beginning and/or end values of a range may be
> omitted, causing Nmap to use 1 and 65535, respectively. So you can
> specify -p- to scan ports
> from 1 through 65535. Scanning port zero. is allowed if you
> specify it explicitly. For IP protocol scanning (-sO), this option
> specifies the protocol
> numbers you wish to scan for (0â??255).
> When scanning both TCP and UDP ports, you can specify a
> particular protocol by preceding the port numbers by T: or U:. The
> qualifier lasts until you
> specify another qualifier. For example, the argument -p
> U:53,111,137,T:21-25,80,139,8080 would scan UDP ports 53, 111,and 137,
> as well as the listed TCP
> ports. Note that to scan both UDP and TCP, you have to
> specify -sU and at least one TCP scan type (such as -sS, -sF, or -sT).
> If no protocol qualifier is
> given, the port numbers are added to all protocol lists.
> Ports can also be specified by name according to what the port is
> referred to in the
> nmap-services. You can even use the wildcards * and ? with
> the names. For example, to scan FTP and all ports whose names begin with
> â??httpâ?, use -p
> ftp,http*. Be careful about shell expansions and quote the
> argument to -p if unsure.
> with regards
> Anshuman Mukherjee
> On Tue, Sep 17, 2013 at 6:25 AM, ToddAndMargo <ToddAndMargo (at) zoho (dot) com [email concealed]
> <mailto:ToddAndMargo (at) zoho (dot) com [email concealed]>> wrote:
> Hi All,
> On the nmap command line, some questions about the "-p"
> parameter:
> 1) what is the "-p S:xxx". What protocol is "S"?
> By change is it ICMP?
> 2) when you omitt the "T:" and/or the "U:" does it check
> both TCP and UDP. What about the mysterious "S" protocol?
> Does it check that too?
> 3) is
> -p 137,138,139,445
> the same as
> -p U:137,138,139,445,T:137,138,__139,445
> ?
> Many thanks,
> -T

Thank you!

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