Article ID: 1079, created on Oct 6, 2008, last review on May 1, 2014

  • Applies to:
  • Plesk 8.1 for Windows
  • Plesk 7.6 for Windows
  • Plesk 7.5 for Windows


Microsoft DNS server does not support IP masks. Therefore when you switch from BIND to MSDNS, the masks are transformed into IP addresses. The IP masks /8 and /16 contain too many IP addresses, support of such list would demand significant resources from a server, therefore such masks are transformed to mask /24.

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