Greetings. I manage an mail server running OpenBSD 4.5 i386. For various layer-9 reasons I cannot reboot the server at this time let alone upgrade it. I can stop and restart processes.
Awhile back when changing ISPs I temporarily added Google's public nameserver at 8.8.8.8 to /etc/resolv.conf. Although that entry is long gone the server continues to send DNS queries to 8.8.8.8. I've also tried running "sh /etc/netstart" and restarting the postfix and dovecot services on this box, but that didn't clear this behavior. My questions: 1. How to flush the resolver so it won't use this nameserver any longer? 2. How to determine which process(es) is/are making calls to the Google nameserver? thanks dn
