CentOS DNS Dummy

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wilso027
Posts: 5
Joined: Fri Sep 12, 2014 10:27 pm

CentOS DNS Dummy

Postby wilso027 » Sun Mar 04, 2007 11:55 am

I have read over everything on setting up DNS properly for hosting your own mail server behind NAT but I just can't get it straight. So sorry if what I am missing is obvious but I can receive email. When I try to send something to my domain I get back:
<
allan@wilsonss.com>: Host or domain name not found. Name service error for

name=mail.wilsonss.com type=A: Host not found
Final-Recipient: rfc822; allan@wilsonss.com

Action: failed

Status: 5.0.0

Diagnostic-Code: X-Postfix; Host or domain name not found. Name service error

for name=mail.wilsonss.com type=A: Host not found

I want mail to be deliverable to username@wilsonss.com and outgoing mail works fine. I have setup DNS on this server and here is what I get if I check my entries with dig:
[root@mail named]# dig mx wilsonss.com
; <<>> DiG 9.2.4 <<>> mx wilsonss.com

;; global options: printcmd

;; Got answer:

;; ->>HEADER<
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:

;wilsonss.com. IN MX
;; ANSWER SECTION:

wilsonss.com . 38400 IN MX 10 mail.wilsonss.com.
;; AUTHORITY SECTION:

wilsonss.com. 38400 IN NS 192.168.0.3.wilsonss.com.
;; Query time: 1 msec

;; SERVER: 127.0.0.1#53(127.0.0.1)

;; WHEN: Sun Mar 4 11:42:32 2007

;; MSG SIZE rcvd: 77

Here is what I have in named.conf(this is just the last section, there is more in the file):
[root@mail named]# more /etc/named.conf

zone "wilsonss.com" {

type master;

file "/var/named/wilsonss.com.hosts";

};

Here is what is in my wilsonss.com.hosts file:
[root@mail named]# more wilsonss.com.hosts

$ttl 38400

@ IN SOA mail.wilsonss.com. root.mail.wilsonss.com. (

2006110200

10800

3600

604800

38400 )

@ IN NS 192.168.0.3

@ IN MX 10 mail.wilsonss.com.

@ IN A 192.168.0.3

I put an entry in to my hosts file:
192.168.0.3     mail.wilsonss.com    mail

And here is what I have in resolv.conf(.3 is mail server and .1 is router)



nameserver 192.168.0.3

nameserver 192.168.0.1

I am hosting the domain name with godaddy and set the mx record on their dns server to point to my routers public ip address. I know I am missing something obvious but I can't figure it out. Thanks for any help.
Allan


marcmac
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Posts: 2091
Joined: Fri Sep 12, 2014 9:53 pm

CentOS DNS Dummy

Postby marcmac » Sun Mar 04, 2007 12:04 pm

SO you've got an MX record for wilsonss.com (mail.wilsonss.com) but there's no A record for mail.wilsonss.com (that entry in your hosts file doesn't count)
you need to add
mail IN A 192.168.0.3
(You can test this with host -t A mail.wilsonss.com - when it comes back with an answer, you're done).
wilso027
Posts: 5
Joined: Fri Sep 12, 2014 10:27 pm

CentOS DNS Dummy

Postby wilso027 » Sun Mar 04, 2007 12:29 pm

That got it, thanks for the quick reply.
Allan
sunshineknox
Posts: 24
Joined: Fri Sep 12, 2014 10:28 pm

CentOS DNS Dummy

Postby sunshineknox » Sat Mar 10, 2007 7:08 pm

Did you add it in your wilsonss.com.hosts file?
wilso027
Posts: 5
Joined: Fri Sep 12, 2014 10:27 pm

CentOS DNS Dummy

Postby wilso027 » Sun Mar 11, 2007 9:44 pm

I added this line to wilsonss.com.hosts:
mail IN A 192.168.0.3
and this fixed it.
Allan
sunshineknox
Posts: 24
Joined: Fri Sep 12, 2014 10:28 pm

CentOS DNS Dummy

Postby sunshineknox » Mon Mar 12, 2007 9:02 pm

that did the trick. I appreciate it, thanks.

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