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Old 12-29-2018, 08:21 AM   #1
dhanashri.d@gmail.com
LQ Newbie
 
Registered: Dec 2018
Posts: 1

Rep: Reputation: Disabled
Unhappy nslookup error-** server can't find servername.dbd.local: NXDOMAIN


Dear Team,

I am quite new to linux env. I have configured ADFS,DNS on AWS EC2- windows and I am trying to federate AD users using SAML in AWS via CLI.

I am getting below error -
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='servername.dbd.local', port=80): Max retries exceeded with url: /idp/profile/SAML2/Unsolicited/SSO?providerId=urn:amazon:webservices (Caused by <class 'socket.gaierror'>: [Errno -2] Name or service not known)

As suggested on few forums, I tried to access above domain by using nslookup but it is also giving me an error -

nslookup servername.dbd.local
Server: 172.31.0.2
Address: 172.31.0.2#53

** server can't find servername.dbd.local: NXDOMAIN

Below are my files-
cat named.conf
// This is the primary configuration file for the BIND DNS server named.
//
// Please read /usr/share/doc/bind9/README.Debian.gz for information on the
// structure of BIND configuration files in Debian, *BEFORE* you customize
// this configuration file.
//
// If you are just adding zones, please do that in /etc/bind/named.conf.local

include "/etc/bind/named.conf.options";
include "/etc/bind/named.conf.local";
include "/etc/bind/named.conf.default-zones";
-------------
cat named.conf
// This is the primary configuration file for the BIND DNS server named.
//
// Please read /usr/share/doc/bind9/README.Debian.gz for information on the
// structure of BIND configuration files in Debian, *BEFORE* you customize
// this configuration file.
//
// If you are just adding zones, please do that in /etc/bind/named.conf.local

include "/etc/bind/named.conf.options";
include "/etc/bind/named.conf.local";
include "/etc/bind/named.conf.default-zones";


root@ip-172-31-6-12:/etc/bind# ^C
root@ip-172-31-6-12:/etc/bind# cat named.conf.default-zones
// prime the server with knowledge of the root servers
zone "." {
type hint;
file "/etc/bind/db.root";
};

// be authoritative for the localhost forward and reverse zones, and for
// broadcast zones as per RFC 1912

zone "localhost" {
type master;
file "/etc/bind/db.local";
};

zone "127.in-addr.arpa" {
type master;
file "/etc/bind/db.127";
};

zone "0.in-addr.arpa" {
type master;
file "/etc/bind/db.0";
};

zone "255.in-addr.arpa" {
type master;
file "/etc/bind/db.255";
};

-----------------
cat resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 172.31.0.2
search eu-central-1.compute.internal

Please suggest me on above issue ...
 
Old 12-29-2018, 11:06 AM   #2
smallpond
Senior Member
 
Registered: Feb 2011
Location: Massachusetts, USA
Distribution: CentOS 6 & 7
Posts: 3,271

Rep: Reputation: 893Reputation: 893Reputation: 893Reputation: 893Reputation: 893Reputation: 893Reputation: 893
The address for servername.dbd.local should be provided by the nameserver for the dbd.local domain. You can show the primary nameserver by doing:

Code:
nslookup -querytype=soa dbd.local
 
  


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