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Diffstat (limited to 'usr.bin/ssh/README.dns')
| -rw-r--r-- | usr.bin/ssh/README.dns | 47 |
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diff --git a/usr.bin/ssh/README.dns b/usr.bin/ssh/README.dns deleted file mode 100644 index 97879183e39..00000000000 --- a/usr.bin/ssh/README.dns +++ /dev/null @@ -1,47 +0,0 @@ -How to verify host keys using OpenSSH and DNS ---------------------------------------------- - -OpenSSH contains support for verifying host keys using DNS as described in -draft-ietf-secsh-dns-05.txt. The document contains very brief instructions -on how to use this feature. Configuring DNS is out of the scope of this -document. - - -(1) Server: Generate and publish the DNS RR - -To create a DNS resource record (RR) containing a fingerprint of the -public host key, use the following command: - - ssh-keygen -r hostname -f keyfile -g - -where "hostname" is your fully qualified hostname and "keyfile" is the -file containing the public host key file. If you have multiple keys, -you should generate one RR for each key. - -In the example above, ssh-keygen will print the fingerprint in a -generic DNS RR format parsable by most modern name server -implementations. If your nameserver has support for the SSHFP RR -you can omit the -g flag and ssh-keygen will print a standard SSHFP RR. - -To publish the fingerprint using the DNS you must add the generated RR -to your DNS zone file and sign your zone. - - -(2) Client: Enable ssh to verify host keys using DNS - -To enable the ssh client to verify host keys using DNS, you have to -add the following option to the ssh configuration file -($HOME/.ssh/config or /etc/ssh/ssh_config): - - VerifyHostKeyDNS yes - -Upon connection the client will try to look up the fingerprint RR -using DNS. If the fingerprint received from the DNS server matches -the remote host key, the user will be notified. - - - Jakob Schlyter - Wesley Griffin - - -$OpenBSD: README.dns,v 1.2 2003/10/14 19:43:23 jakob Exp $ |