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At some point hitherto, [EMAIL PROTECTED] hath spake thusly: > >When you ping an IP address, you are not doing a reverse DNS, you are > >simply accessing the ip address. No DNS is involved, simply routers. > >Reverse DNS is used by mail servers to validate that an email message comes > >from the host it purports to be. (eg. anti-SPAM). > > IIRC, RH7.0 actually *DID* attempt a reverse-dns look up when > ping'ing an IP address. This was definitely the behavior with RH 6.1 and 6.2 out of the box, but I'm not positive about 7.0. > Note, this was a bug, and not the expected/desirable behavior. I'm not sure you could convince RH of that, but agreed... ;-) They seem to take the position that they should look up the IP address in order to print the hostname in the ping output. This does make *some* sense, and if you use the -n option to ping it does not do this. Given that they do have a way to turn off host lookups, it's not entirely unreasonable. The real problem though, is that (from the behavior I observed) it seems to try to resolve the address in a loop. If it's going to insist on doing this, it should only try ONCE, and if it fails just use the IP address and forget about the host name. I am not sure if this has been "fixed" in recent RH versions of ping or not. - -- Derek Martin [EMAIL PROTECTED] - --------------------------------------------- I prefer mail encrypted with PGP/GPG! GnuPG Key ID: 0x81CFE75D Retrieve my public key at http://pgp.mit.edu Learn more about it at http://www.gnupg.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE8ZBttdjdlQoHP510RAkR/AJ0SX4jcUgGgZLUZPiAa/Qt5JfD8awCdESf6 y/oCxij3+zBYW9+sWVqAmi0= =rOCM -----END PGP SIGNATURE----- ***************************************************************** To unsubscribe from this list, send mail to [EMAIL PROTECTED] with the text 'unsubscribe gnhlug' in the message body. *****************************************************************
