iOS 4: Unable to resolve unicast DNS names that end in .local

Products Affected

iPhone, iPod touch

Symptoms

iOS 4 devices are unable to resolve unicast DNS names that end with a ".local" suffix, affecting access to internal corporate networks that use an internal, top-level domain name, such as "mydomain.local".

Resolution

Update your device to iOS 4.1 or later.

Additional Information

Bonjour's Multicast Domain Name Service (mDNS) uses the ".local" suffix to identify Bonjour-accessible devices. When planning for internal corporate network naming, to avoid conflicts with Bonjour, consider using a different domain suffix, such as one of the following:

  • .private
  • .intranet
  • .internal
  • .lan
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