Question about host name in /etc/conf.d/hostname

sgao · Tux's lil' helper Joined: 22 Apr 2006 Posts: 149

Hi,

I have one question about whether one should use fully qualified domain host name (FQDN) or just host name in /etc/conf.d/hostname.

If I just put a host name in /etc/conf.d/hostname, then mails going out of the machine will have incomplete address like user@host, instead of "user@host.domain.com", even if I set "dns_domain_eth0=domain.com" in /etc/conf.d/net.

If I put a FQDN host name, say "host.domain.com", in /etc/conf.d/hostname, then out going emails from the machine will have correct host address as "user@host.domain.com". However, my login console will display like "host.domain.com.domain.com" instead of just "host.domain.com". My question is why sometimes domain part of host address is used, but at other times on more important things like email address, domain address not appended?

The mail program in question is Postfix. In the main.cf config file, I do have one line to specify the host name like "host.domain.com". But without setting FQDN in /etc/conf.d/hostname, outgoing emails still have address with just host name part.

My impression is that it's preferred to just put host name part in /etc/conf.d/hostname, domain name part will be appended automatically based on settings in /etc/conf.d/net. Isn't that the case?

Anyone else has see the similar issue?

Simon

timeBandit · Posted: Tue Dec 04, 2007 9:11 pm Post subject:

Set your host name (only) in /etc/conf.d/hostname. Set your DNS domain name (only) in /etc/conf.d/domainname. Restart all network services including Postfix to pick up the configuration. Addresses should then be suffixed with the FQDN.
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linear · Apprentice Joined: 12 Aug 2004 Posts: 222

Okay,

You should just put the system's hostname in /etc/conf.d/hostname, not the FQDN. The FQDN goes into the system's entry in /etc/hosts. The domain name goes into /etc/conf.d/domainname on the "DNSDOMAIN=" line.

So, it should look something like this:

UberLord · Posted: Tue Dec 04, 2007 10:16 pm Post subject:

Are you guys on crack? baselayout removed the domainname init script over a year ago.

dns_domain_lo="foo.bar" in /etc/conf.d/net is now preferred.
OR you can set the FQDN in /etc/conf.d/hostname.

It all depends what you want - dns_domain_$IFACE confiures /etc/resolv.conf and hostname just configures the hostname.
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linear · Apprentice Joined: 12 Aug 2004 Posts: 222

?????

timeBandit · Posted: Wed Dec 05, 2007 2:39 am Post subject:

UberLord · Posted: Wed Dec 05, 2007 8:56 am Post subject:

Portage should have removed them .....

Oh well.

The domainname script is silly and pointless. I advise removing it.

Regarding Postfix - well, some people (like me) think it's a Postfix bug as other server applications Get It Right. I do what the prior poster does and specify the domain in the postfix config.
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sgao · Tux's lil' helper Joined: 22 Apr 2006 Posts: 149

I did followed the recent changes for domain name setup. /etc/conf.d/domainname has been replaced by dns_domain_lo and dns_domain_eth0 in /etc/conf.d/net.

It could be postfix issue since I did put in both hostname (FQDN) and domain name in main.cf file. I noticed this problem when logwatch sends out daily reports, the address is <logwatch@host> instead of <logwatch@host.domain.com>. Sometimes it's desirable to attach domain name if a network is divided into different subdomains. I will check out Sendmail and see how Sendmail does.

Simon