Re: Another Crazy DNS Question... ;-)
Art Lemasters ([EMAIL PROTECTED]) wrote: Does anyone here know how to do this with the most recent sendmail in potato (8.9.3) to receive mail for both domain.com and machine.domain.com, etc.? Make sure all the domains for which you wish to receive mail are defined in the 'w' (or is it 'W'?) class, either in /etc/sendmail.cf or in some auxiliary file such as /etc/sendmail.cw (if sendmail.cf points to that). (I normally use qmail, so I can't remember whether it's 'Cw' or 'CW') -- Greg Wooledge| Truth belongs to everybody. [EMAIL PROTECTED] | Red Hot Chili Peppers, http://www.kellnet.com/wooledge/ | pgp0Nutsd8x8t.pgp Description: PGP signature
Another Crazy DNS Question... ;-)
How can I set up two completely different FQDNs (two totally different hostnames) on one box (e.g., my.domain.net alsomy.otherdomain.net) so that this machine accepts traffic on my.domain.net while appearing to be alsomy.otherdomain.net to anyone who accesses it via the webserver or mailserver? ;-) Do I need to run virtual hosting here? Will it work to point A records from each of those host names to the same, single IP address? Art
Re: Another Crazy DNS Question... ;-)
On Wed, 3 Nov 1999, Art Lemasters wrote: How can I set up two completely different FQDNs (two totally different hostnames) on one box (e.g., my.domain.net Point both DNS entries at your IP address. You can only have your IP map to one of them in reverse DNS, though. If you absolutely have to have that, you need to have virtual hosting. alsomy.otherdomain.net) so that this machine accepts traffic on my.domain.net while appearing to be alsomy.otherdomain.net to anyone who accesses it via the webserver or mailserver? ;-) You configure this with the webserver and mailserver software. For the mailserver it is easy, just put all the domains you want to receive mail for in sendmail.cw. If you only want to receive mail for one domain, the easiest is to set the system's domain name to that and forget about sendmail.cw. Of course, if you want to receive mail for both and also maintain separate lists of users for each domain then you must work harder. For the webserver, you can configure virtual hosting in a variety of ways. Of course, that's only necessary if you want to do webserving for both domains. If you only want to do webserving for one, just pretend the other one doesn't exist. Do I need to run virtual hosting here? Will it work to point A records from each of those host names to the same, single IP address? Virtual hosting is a nebulous term. Yes, you can point A records from two domains to the same IP address.
Re: Another Crazy DNS Question... ;-)
yeah that would work fine, point 1 domain at 1 ip, or point a million domains at 1 ip ..its all the same ..now if your doing it for web hosting, e.g. http://www.aphroland.org and http://yahoo.aphroland.org and http://comedy.aphroland.org are all the same ip (208.222.179.35) however they are all (completely) different sites. you can do this in apache with the NameVirtualHost directive(on apache 1.3), and a HTTP 1.1 complient WWW client (something like IE2.0 is not HTTP 1.1 compliant) nate [mailto:[EMAIL PROTECTED] ]-- Vice President Network Operations http://www.firetrail.com/ Firetrail Internet Services Limited http://www.aphroland.org/ Everett, WA 425-348-7336http://www.linuxpowered.net/ Powered By:http://comedy.aphroland.org/ Debian 2.1 Linux 2.0.36 SMPhttp://yahoo.aphroland.org/ -[mailto:[EMAIL PROTECTED] ]-- 10:39pm up 76 days, 10:06, 1 user, load average: 0.34, 0.38, 0.36 On Wed, 3 Nov 1999, Art Lemasters wrote: How can I set up two completely different FQDNs (two totally different hostnames) on one box (e.g., my.domain.net alsomy.otherdomain.net) so that this machine accepts traffic on my.domain.net while appearing to be alsomy.otherdomain.net to anyone who accesses it via the webserver or mailserver? ;-) Do I need to run virtual hosting here? Will it work to point A records from each of those host names to the same, single IP address? Art -- Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] /dev/null
Re: Another Crazy DNS Question... ;-)
On Wed, 3 Nov 1999, Art Lemasters wrote: How can I set up two completely different FQDNs (two totally different hostnames) on one box (e.g., my.domain.net alsomy.otherdomain.net) so that this machine accepts traffic on my.domain.net while appearing to be alsomy.otherdomain.net to anyone who accesses it via the webserver or mailserver? ;-) Do I need to run virtual hosting here? Will it work to point A records from each of those host names to the same, single IP address? Art The easiest method is virtual hosting for the alsomy.otherdomain.net hostname, since you need only mail and web there. Robert Varga
Re: Another Crazy DNS Question... ;-)
On Thu, Nov 04, 1999 at 12:01:29AM -0500, William T Wilson wrote: Yes, you can point A records from two domains to the same IP address. You can also use a CNAME record. I'm not sure when one approach would be preferred over the other. You can also use virtual hosting to have the same machine use two different IP addresses. Bob -- Bob Nielsen Internet: [EMAIL PROTECTED] Tucson, AZ AMPRnet: [EMAIL PROTECTED] DM42nh http://www.primenet.com/~nielsen
Re: Another Crazy DNS Question... ;-)
Bob Nielsen wrote: On Thu, Nov 04, 1999 at 12:01:29AM -0500, William T Wilson wrote: Yes, you can point A records from two domains to the same IP address. You can also use a CNAME record. I'm not sure when one approach would be preferred over the other. This is true however the rfc (not sure what number to look at) I believe says that the hostname mentioned in an MX record shouldn't be a CNAME. I should also mention that as far as how your mailserver appears to other machines, when a mailserver is _sending_ mail out it first announces its identity via the HELO or EHLO commands. What identity the host presents itself as to other SMTP hosts is configurable in all the mail server packages I've dealt with. That said, mail server packages that I've dealt with will only allow you configure it to present itself as a single identity. This doesn't affect mail clients which would get mail via POP/IMAP of course. -- Jens B. Jorgensen [EMAIL PROTECTED]
Re: Another Crazy DNS Question... ;-)
On Thu, 4 Nov 1999, Bob Nielsen wrote: On Thu, Nov 04, 1999 at 12:01:29AM -0500, William T Wilson wrote: Yes, you can point A records from two domains to the same IP address. You can also use a CNAME record. I'm not sure when one approach would be preferred over the other. You cannot use a CNAME record for mail hosting. Robert Varga
Re: Another Crazy DNS Question... ;-)
On Thu, 4 Nov 1999, Bob Nielsen wrote: Yes, you can point A records from two domains to the same IP address. You can also use a CNAME record. I'm not sure when one approach would be preferred over the other. The answer is simple: Use A records for everything and forget about CNAMEs. :} I use a CNAME when a machine is supposed to have multiple names for the same purpose. For example, if your machine is www.foo.com and you also want it to be www.department.foo.com then use a CNAME. But if your machine is mail.foo.com and you also want it to be mail.bar.com then use an A record, because foo.com and bar.com are not the same entity. Another way to look at it is to use CNAME for aliases to a machine. For example, if your organization mandates stupid names for machines like tor-fde1 and you want the machine to also have a name that people can remember, then you could also call the machine teddybear and use a CNAME for that. Then, if tor-fde1 changes IP addresses, teddybear goes with it.
Re: Another Crazy DNS Question... ;-)
On Thu, Nov 04, 1999 at 01:09:32PM -0500, William T Wilson wrote: On Thu, 4 Nov 1999, Bob Nielsen wrote: Yes, you can point A records from two domains to the same IP address. You can also use a CNAME record. I'm not sure when one approach would be preferred over the other. The answer is simple: Use A records for everything and forget about CNAMEs. :} I use a CNAME when a machine is supposed to have multiple names for the same purpose. For example, if your machine is www.foo.com and you also want it to be www.department.foo.com then use a CNAME. But if your machine is mail.foo.com and you also want it to be mail.bar.com then use an A record, because foo.com and bar.com are not the same entity. Does anyone here know how to do this with the most recent sendmail in potato (8.9.3) to receive mail for both domain.com and machine.domain.com, etc.? It does _not_ work to just run sendmailconfig and choose to receive mail for domains __ FQDNs--at least not on this box. It will only receive mail to one or the other. Art
