-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 07/03/2013 04:39 AM, Matus UHLAR - fantomas wrote: > On 02.07.13 08:53, Daniel McDonald wrote: >> I've had trouble with OSI-Soft PI historian without reverse >> entries. If there is no reverse, then the PI software would >> spend about 30 seconds looking in vain for a DNS answer before >> sending a SYN-ACK packet. > > If there is no reverse, the software should get NXDOMAIN answer. in > such case there's nothing to wait for any longer. Are you sure that > was not a case of unreachable servers?
Something I just stumbled over today (funny that it was during this topic) is that there is a Cisco ASA issue that makes reverse queries against anything but in-addr.arpa fail with a timeout. Unfortunately, some things check IN-ADDR.ARPA (why on earth?) and the lack of that entry is apparently causing mail delivery problems. - -- ____*Note: UMDNJ is now Rutgers-Biomedical and Health Sciences* || \\UTGERS |---------------------*O*--------------------- ||_// Biomedical | Ryan Novosielski - Sr. Systems Programmer || \\ and Health | novos...@rutgers.edu - 973/972.0922 (2x0922) || \\ Sciences | OIT/EI-Academic Svcs. - ADMC 450, Newark `' -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iEYEARECAAYFAlHU400ACgkQmb+gadEcsb6VMgCgrly3VyQLx5LOMo/9+A69amDr rQoAoN3gMhd2zQuQaozh2+/gJ05XUZNb =DJTm -----END PGP SIGNATURE----- _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users