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A possible fix for slow SSH connections
tcpdump showed me that my mac won't try the order of preference which lookupd is supposed to use, it tries mDNS (Rendezvous) instead. Adding an address to /etc/hosts will fix it, but a better way would be to set the search to hosts first, followed by dns and mDNS afterwards.
sshd, lookupd, reverse DNS
That might explain the "Apr 3 11:48:26 hostname sshd[1731]: reverse mapping checking getaddrinfo for example.org failed - POSSIBLE BREAKIN ATTEMPT!" warnings from sshd even when reverse DNS is properly configured. But I don't see any way to configure lookupd to avoid that; it's currently using:
LookupOrder: Cache FF DNS NI DS _config_name: Host ConfigurationAnother symptom is the who command (for instance) displaying the IP address for remote hostnames, while DNS PTR lookups return accurate data.Anyone know what needs to be tweaked so address-to-name lookups will work properly, without creating static host entries, when DNS is verified as correctly configured? |
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