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Status Delivered
Workspace z/OS
Created by Guest
Created on Mar 30, 2016

Communication Server IPFilter Logging Enhancement

The ability to only log IPFilter packets of connection handshakes and disconnects instead of every packet.

Idea priority High
  • Guest
    Reply
    |
    May 12, 2023
    This has been addressed with zERT enforcement delivered in z/OS V2R5. It was also addressed via SMF records with the original zERT delivery in z/OS V2R3.
  • Guest
    Reply
    |
    Jan 27, 2022

    A few alternatives to consider:
    - You could use z/OS Communications Server SMF records to provide a complete record of TCP connection establishment and termination:
    - An SMF type 119 subtype 1 record can be written each time a TCP connection is established, and a subtype 2 record can be written each
    time a TCP connection terminates.
    - You could also use z/OS Encryption Readiness Technology (zERT) SMF 119 subtype 11 records in a similar fashion. The basic zERT function
    can write SMF type 119 subtype 11 records for each individual TCP and EE connection. Depending on the length of time the connection exists,
    you will get either a single SMF 119-11 record (written at connection termination if the connection lasts less than 10 seconds) or two records
    (one at connection initiation and another at connection termination if the connection lives longer than 10 seconds).
    - You could use zERT policy-based enforcement to log a message to syslogd each time a TCP connection is established, along with its security
    attributes. You would have to install such a rule for each cryptographic protocol you use in your shop – TLS, SSH, and IPsec – as well as another
    for unprotected traffic. zERT enforcement does not log connection termination though.