Unix and Linux System Administration Handbook (4th Edition) by Nemeth Evi & Snyder Garth & Hein Trent R. & Whaley Ben

Author:Nemeth, Evi & Snyder, Garth & Hein, Trent R. & Whaley, Ben [Nemeth, Evi]
Language: eng
Format: epub
Publisher: Pearson Education
Published: 2010-07-14T00:00:00+00:00

generate for example.com a 1,024-bit ZSK pair that uses the RSA and SHA-1 algorithms and a corresponding 2,048-bit KSK pair.30 The outstanding issue of UDP packet size limits suggests that it’s best to use short zone-signing keys, but to change them often. You can use longer key-signing keys to help recover some security. It takes awhile to generate the keys—a minute or two for short keys, and a half-hour or more for longer keys on a tired old laptop.

Both key generators print the base filename of the key they have generated to standard out. In this example, example.com is the name of the key, 005 is the identifier of the RSA/SHA-1 algorithm suite, and 23301 and 00682 are hashes called the key identifiers, key footprints, or key tags.31 Each run of the BIND key generator creates two files (.key and .private), and the NSD key generator produces three files (.key, .private, and .ds):

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