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 Capture only the ACSE traffic over the default port (80): {{{  Capture only the PRES traffic over the default port (80): {{{
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 * add link to PROTO specification and where to find additional info on the web about it, e.g.:
 * [http://www.ietf.org/rfc/rfc123.txt RFC 123] ''The RFC title'' - explanation of the RFC content.
* [http://www.itu.int/ITU-T/asn1/database/itu-t/x/x226/index.html] ITU PRES page.

CONNECTION-ORIENTED PRESENTATION PROTOCOL (PRES)

This protocol is defined as ITU recommendation X.226

History

This protocol is part of the OSI stack.

Protocol dependencies

  • ["TCP"]: Typically, PROTO uses ["TCP"] as its transport protocol. The well known TCP port for PROTO traffic is 80.

Example traffic

XXX - Add example traffic here (as plain text or Ethereal screenshot).

Ethereal

The PRES dissector is generated by the ["ASN2ETH"} compiler.

Preference Settings

(XXX add links to preference settings affecting how PROTO is dissected).

Example capture file

XXX - Add a simple example capture file to the SampleCaptures page and link from here (see below). Keep this file short, it's also a good idea to gzip it to make it even smaller, as Ethereal can open gzipped files automatically.

  • attachment:SampleCaptures/PROTO.pcap

Display Filter

A complete list of PRES display filter fields can be found in the [http://www.ethereal.com/docs/dfref/p/pres.html display filter reference]

  • Show only the PROTO based traffic:

     pres 

Capture Filter

You cannot directly filter PRES protocols while capturing. However, if you know the ["TCP"] port used (see above), you can filter on that one.

  • Capture only the PRES traffic over the default port (80):

     tcp port 80 

* [http://www.itu.int/ITU-T/asn1/database/itu-t/x/x226/index.html] ITU PRES page.

Discussion

PRES (last edited 2008-04-12 17:51:24 by localhost)