locked
Limit for Subject Alternative Names RRS feed

  • Question

  •  

    hi all,

     

    is there limit for the Subject Alternative Names that can be included in a certificate?

     

    Thanks

    AB

    Wednesday, July 30, 2008 3:31 PM

All replies

  • Public CAs usually limit the number of SANs you can put on a certificate based on the type (and price) of the certificate.  I once had to generate a certificate with about 100 SANs (don't ask) from a Windows CA and it worked perfectly.  At the time I was not able to find a documented limit.

    Wednesday, July 30, 2008 6:20 PM
    Moderator
  • I'm still looking for a reference, but I thought I just saw something while reading up on ISA SP1 about 100 entries?  I don't know if a limit is certificate specific or an universal, RFC-defined limit.

    Wednesday, July 30, 2008 6:22 PM
    Moderator
  • Here is the official supported 3rd Party Certificate provider list

    http://support.microsoft.com/kb/929395

     

    Some of them offer up to 150 names in the SAN

     

    Wednesday, July 30, 2008 8:50 PM