Well, it resolved fine on Monday. Today, not so much. Using my ISP's DNS servers, or Google's, it resolves just fine, but using my SME server itself, nothing:
[dan@e-smith ~]$ host web-okcd01.mail.mil
;; connection timed out; trying next origin
Host web-okcd01.mail.mil not found: 3(NXDOMAIN)
[dan@e-smith ~]$ host web-okcd01.mail.mil 8.8.8.8
Using domain server:
Name: 8.8.8.8
Address: 8.8.8.8#53
Aliases:
web-okcd01.mail.mil has address 156.112.108.147
web-okcd01.mail.mil.familybrown.org is an alias for familybrown.org.
familybrown.org mail is handled by 0 familybrown.org.
[dan@e-smith ~]$ host web-okcd01.mail.mil 75.75.75.75
Using domain server:
Name: 75.75.75.75
Address: 75.75.75.75#53
Aliases:
web-okcd01.mail.mil has address 156.112.108.147
web-okcd01.mail.mil.familybrown.org is an alias for familybrown.org.
familybrown.org mail is handled by 0 familybrown.org.
/var/log/dnscache/current shows:
@40000000559d1e841ba815f4 query 107145 c0a80101:b201:4bf6 1 web-okcd01.mail.mil.
@40000000559d1e841ba87f6c tx 0 1 web-okcd01.mail.mil. . 7f000002
@40000000559d1e891ba946a4 query 107146 c0a80101:b201:4bf6 1 web-okcd01.mail.mil.
@40000000559d1e891ba9b7ec tx 0 1 web-okcd01.mail.mil. . 7f000002
@40000000559d1e8e1bac482c query 107147 c0a80101:899b:1350 1 web-okcd01.mail.mil.familybrown.org.
@40000000559d1e8e1bac9e1c cached nxdomain web-okcd01.mail.mil.familybrown.org.
@40000000559d1e8e1baca204 sent 107147 53