Question on changing hostname

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11-12-2007
satimis

Question on changing hostname

Hi folks,

Ubuntu 7.04 server amd64

I need to change hostname from;

Code:

ubuntu.satimis.com

to:

Code:

mail.satimis.com

Apart making changes on;

1)
$ sudo postconf -e myhostname=mail.satimis.com
$ cat /etc/postfix/main.cf | grep myhostname

Code:

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) myhostname = mail.satimis.com

$ sudo /etc/init.d/postfix restart

Code:

* Stopping Postfix Mail Transport Agent postfix [ OK ] * Starting Postfix Mail Transport Agent postfix [ OK ]

2)
Edit /etc/hosts as;

Code:

127.0.0.1 localhost.localdomain localhost 192.168.0.10 mail.satimis.com mail # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts

Edit /etc/hostname as;

Code:

mail.satimis.com

$ sudo newaliases
$ sudo hostname mail.satimis.com
Both w/o complaint

$ uname -n
mail.satimis.com
$ hostname -a
mail
$ hostname -s
mail
$ hostname -d
satimis.com
$ hostname -f
mail.satimis.com
$ hostname
mail.satimis.com
$ hostname -i
192.168.0.10
$ hostname -y
(none)

I don't have /etc/sysconfig/network file and "sysconfig" directory

Please advise any other files I need to edit as well. TIA

B.R.
satimis
11-12-2007
Roxoff

Surely this is a question of DNS? If you point mail.satmis.com at your mail server, you can name the mail server whatever you like. In fact, it's surely more convenient to have a CNAME entry in your dns, pointing a 'mail' alias at your mail handling machine's real DNS name, so that if the machine falls over for any reason (or if it's down for maintenance for any length of time) you can just point the 'mail' CNAME somewhere else as needed?
11-12-2007
satimis

Quote:

Originally Posted by Roxoff

Surely this is a question of DNS? If you point mail.satmis.com at your mail server, you can name the mail server whatever you like. In fact, it's surely more convenient to have a CNAME entry in your dns, pointing a 'mail' alias at your mail handling machine's real DNS name, so that if the machine falls over for any reason (or if it's down for maintenance for any length of time) you can just point the 'mail' CNAME somewhere else as needed?

Thanks for your advice.

Here is cat /etc/resolve.conf;

Code:

nameserver 202.14.67.4 nameserver 202.14.67.14 satimis@#ubuntu

202.14.67.4
202.14.67.14

are DNS of ISP.

I think there is a mistake here. Whether delete "satimis@#ubuntu" and replace it with "mail.satimis.com"?

I found following error;

1)
At booting on text scrolling;

Code:

Warning:unable to determin IP address of 'ubuntu_mail.satimis.com' error: no value servers configured - Fatal error processing configuration file '/etc/proftpd/proftpd.con [fail]

2)
Login as satimis. On console, it prompt;

Code:

mail:~$

Not

Code:

satimis@mail:~$

3)
$ dig satimis.com

Code:

; <<>> DiG 9.3.4 <<>> satimis.com ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56433 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2 ;; QUESTION SECTION: ;satimis.com. IN A ;; ANSWER SECTION: satimis.com. 3600 IN A 220.232.213.178 ;; AUTHORITY SECTION: satimis.com. 3600 IN NS ns43.domaincontrol.com. satimis.com. 3600 IN NS ns44.domaincontrol.com. ;; ADDITIONAL SECTION: ns43.domaincontrol.com. 2008 IN A 208.109.78.180 ns44.domaincontrol.com. 3341 IN A 208.109.80.75 ;; Query time: 240 msec ;; SERVER: 202.14.67.4#53(202.14.67.4) ;; WHEN: Mon Nov 12 22:36:20 2007 ;; MSG SIZE rcvd: 129 satimis@#ubuntu

Please advise how to fix the problem. TIA

B.R.
satimis
11-12-2007
Roxoff

Your ISP needs to report the right IP address for the MX for the domain.

Get them to set up you MX record for the domain to "mail.satmis.com.", and get them to set up a CNAME to point "mail.satmis.com." to "ubuntu.satmis.com.", and change your computer back. Then you only need to tell your mailserver that it's answering all mail for the 'satmis.com' domain, and that it needs to answer to the name 'mail' if necessary.
11-12-2007
satimis

Quote:

Originally Posted by Roxoff

Your ISP needs to report the right IP address for the MX for the domain.

Get them to set up you MX record for the domain to "mail.satmis.com.", and get them to set up a CNAME to point "mail.satmis.com." to "ubuntu.satmis.com.", and change your computer back. Then you only need to tell your mailserver that it's answering all mail for the 'satmis.com' domain, and that it needs to answer to the name 'mail' if necessary.

Whether you meant MX record on Registrar's site?

I did it already.

Sorry on my previous posting I made a mistake. "dig satimis.com" should be w/o "satimis@#ubuntu" displayed. It should be on console command prompt.

On console it displays 2 lines

Code:

satimis@#ubuntu mail:~$

It is quite strange.

$ dig MX mail.satimis.com

Code:

; <<>> DiG 9.3.4 <<>> MX mail.satimis.com ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57982 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mail.satimis.com. IN MX ;; ANSWER SECTION: mail.satimis.com. 3589 IN CNAME mail.satimis.com. ;; Query time: 20 msec ;; SERVER: 202.14.67.4#53(202.14.67.4) ;; WHEN: Tue Nov 13 00:31:11 2007 ;; MSG SIZE rcvd: 48

satimis
11-13-2007
Roxoff

Looks like your DNS MX records are screwed up somewhere; maybe you should discuss this with your ISP, having mail.satmis.com point as a CNAME to mail.satmis.com just has email servers timing out rather than sending you mail.