CSCF Networking Twiki

This is to augment CSCF WWW networking information which is the authoritative site until merged with this site.

There are also public facing Network planning guidelines located at:

CSCF networking philosophy and schema

A description of our underlying network design principles, the various classes of networks allocated to us, and how we intend to use them.

Network hardware

Host naming and DNS updates

  • DNS server quick reference:
    • For systems that use CS directory services, you need to be able to access the CS SRV records so:
      • in DC use:, and
      • in MC use:, and
    • If the client OS doesn't need CS directory services, or if the client supports more than three severs, add the IST servers and Note that previous IST DNS adddresses (128.100, 128.10, 129.10 etc) are all deprecated and should not be used.
  • There is public DNS documentation at to which users can be referred.
  • See for details of the architecture of our DNS service.
  • HostNameConventions - how to name machines and fill in the DNS information with IST's DNS utility

External Domain Registration and Management


Network Security

Training and Tutorials

From time-to-time, at CSCF staff meetings and elsewhere, the Networking group presents briefings and information updates to CSCF staff. See "Networking updates" in


VLAN and subnet information

Miscellaneous Notes

Historical information, now obsolete

Firewall information (obsolete as of December 2013)

Topic revision: r117 - 2014-09-12 - DaveGawley
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