Questions tagged [rdns]
Reverse Domain Name Server
14
questions
1
vote
0
answers
25
views
How to prioritise one domain name over others in rDNS?
I have a single remote server and multiple domain names. This server hosts webpages under certain domain names - say domain1.com - and hosts a webpage with an associated mail server under a separate ...
4
votes
3
answers
3k
views
IP doesn't support rdns needed for email server
I'm setting up an email server for my business and personal use. I have a public static ip address from Cincinnati Bell (now altafiber). I tried getting them to setup/delegate reverse dns lookup via ...
0
votes
1
answer
96
views
Clients with broken reverse DNS are slow to connect, how to fix?
Some client has no reverse DNS and that clients has long timeout on connect with different services like ftp, ssh and more. How to configure reverse dns resolution right on production servers? Maybe ...
2
votes
1
answer
2k
views
Why my emails go to junk folder?
I registered a new .xyz domain name a few days ago. The domain name was never registered by others before. I set up a postfix server on a clean ip(checked its reputation). I set up SPF, DKIM, and ...
1
vote
1
answer
84
views
What is the standard for assigning rDNS to unused hosts?
In a range with unused hosts, is the standard to set the rDNS to a generic default one within the network (such as the IP address dot the company's domain name) or is rDNS not meant to be set for an ...
0
votes
0
answers
60
views
Is there an advantage to using separate IPv4 and IPv6 reverse delegation servers?
Currently, we have the following DNS servers setup for reverse DNS of IPv4 and IPv6 ranges:
rdns0.v4.rdns
rdns1.v4.rdns
rdns2.v4.rdns
rdns0.v6.rdns
rdns1.v6.rdns
rdns2.v6.rdns
Where the v4 servers ...
0
votes
0
answers
1k
views
Reverse DNS setup not working - BIND on CentOS 7
I haven't setup BIND before but am quite knowledgable with DNS (I'm from the Windows world). I'm having a reverse DNS issue. Forward DNS is working fine for the zone int.linuxlab
Here are the ...
0
votes
1
answer
694
views
Create a fake RDNS resolution in Linux
I'm currently contributing at Mozilla Community IT, and I'm working with our infrastructure team to setup a puppet master.
Puppet doesn't play nicely without RDNS resolving properly, but our cloud ...
1
vote
2
answers
2k
views
How can traceroute show two different names for the same IP address?
Here are two traceroutes both to 82.195.128.132. One results in the name ns1.hosting365.ie and the other in the name mail.hosting365.ie. Why the difference?
traceroute to mail.cameracentre.ie (82.195....
0
votes
1
answer
2k
views
Is the reverse DNS lookup performed by IRC networks usually validated against the forward lookup?
Google gave me conflicting answers for this one. Some believed that most networks take the lazy attitude to DNS lookups and simply set your hostname to whatever RDNS throws up while others said it was ...
2
votes
1
answer
610
views
Setting up an email server's IP address for reverse DNS lookup
Should I set my IP address' PTR record to the domain (mydomain.com) or the subdomain where the mail server is (mail.mydomain.com)? It's a little confusing.
6
votes
4
answers
13k
views
How long does reverse DNS take to propagate?
Say I have two domains, foo.com and bar.com, and I initially have an A record for:
www.foo.com → 1.2.3.4
I then decide I want www.bar.com to resolve to this IP, so I delete www.foo.com's A ...
27
votes
7
answers
111k
views
How To Resolve IP Addresses To Domain Names?
I know it is possible to resolve IP addresses to host names but can IPs be resolved to domain names?
1
vote
5
answers
265
views
IP address + domain name
I have an IP address, xx.xx.xx.xx, for which ping works. But when I do an nslookup for that IP address it is failing. Is there a way to find the domain name of the machine with the IP address xx.xx.xx....