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SSH configuration fixes.

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Use GlobalKnownHostsFile instead of GlobalKnownHostsFile2 in ssh_config, as the
latter has been deprecated in OpenSSH 5.9.

If DNS host key verification is enabled, restrict the set of allowed host
public key algorithms to ssh-rsa and ssh-dss, as DNS SSHFP records support only
these algorithms.

Make sure public key user authentication is enabled in both ssh and sshd.

ticket 2769
This commit is contained in:
Jan Cholasta 2012-05-23 05:00:55 -04:00 committed by Martin Kosek
parent 43701d2735
commit d62b2d9be5
1 changed files with 7 additions and 2 deletions
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9
ipa-client/ipa-install/ipa-client-install
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@ -856,12 +856,16 @@ def configure_ssh(fstore, ssh_dir, options):
if file_exists(ssh_config): if file_exists(ssh_config):
fstore.backup_file(ssh_config) fstore.backup_file(ssh_config)
changes = {} changes = {
'PubkeyAuthentication': 'yes',
}
if options.trust_sshfp: if options.trust_sshfp:
changes['VerifyHostKeyDNS'] = 'yes' changes['VerifyHostKeyDNS'] = 'yes'
changes['HostKeyAlgorithms'] = 'ssh-rsa,ssh-dss'
elif options.sssd and file_exists('/usr/bin/sss_ssh_knownhostsproxy'): elif options.sssd and file_exists('/usr/bin/sss_ssh_knownhostsproxy'):
changes['ProxyCommand'] = '/usr/bin/sss_ssh_knownhostsproxy -p %p %h' changes['ProxyCommand'] = '/usr/bin/sss_ssh_knownhostsproxy -p %p %h'
changes['GlobalKnownHostsFile2'] = '/var/lib/sss/pubconf/known_hosts' changes['GlobalKnownHostsFile'] = '/var/lib/sss/pubconf/known_hosts'
change_ssh_config(ssh_config, changes, ['Host']) change_ssh_config(ssh_config, changes, ['Host'])
print 'Configured', ssh_config print 'Configured', ssh_config
@ -877,6 +881,7 @@ def configure_ssh(fstore, ssh_dir, options):
fstore.backup_file(sshd_config) fstore.backup_file(sshd_config)
changes = { changes = {
'PubkeyAuthentication': 'yes',
'KerberosAuthentication': 'no', 'KerberosAuthentication': 'no',
'GSSAPIAuthentication': 'yes', 'GSSAPIAuthentication': 'yes',
'UsePAM': 'yes', 'UsePAM': 'yes',