Questions tagged [reverse-dns]
The reverse-dns tag has no usage guidance.
26
questions
0
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1
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Reverse-DNS not correct (BIND9 DNS + ISC DHCP)
In my home network under Ubuntu I use a BIND9 DNS server and an ISC DHCP server with Webmin.
Here are my settings:
DNS Master Zone:
Foward: home.local
Reverse: 192.168.5
/etc/bind/named.conf.local:
//...
- 1
1
vote
1
answer
96
views
how do you do find out what domain an ip address is associated with?
When I do:
ping www.google.com
it comes back with a response
PING www.google.com (172.253.122.147): 56 data bytes
So this means www.google.com resolves to 172.253.122.147.
What command(s) can I run ...
- 143
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 ...
- 143
0
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1
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298
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modify a router's reply to macOS's reverse DNS query such that hostname defaults to the .local domain
I have read that on BSD/macOS/OS X, hostname is found from a search that includes a few places. One part of the search can be a reverse DNS lookup. For DNS lookup, I observe different behavior on ...
- 101
2
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2
answers
15k
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How to find dns entries for IP-address
I am trying to do a reverse DNS lookup (find DNS-entries for a specific IP-address).
A search gave me the answer to use dig and nslookup, but these tools do not work for me.
E.g. I ping superuser.com, ...
- 73
0
votes
1
answer
293
views
Should reverse-dns results resolve to the original IP?
I'm interested in taking a log file that I will review and "beautifying" its entries by replacing IPs with their reverse-DNS entries.
For instance:
75.76.69.69: meaningless
RDNS → dynamic-...
- 1,206
0
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2
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714
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can i set up a reverse DNS to a public IP?
Is it possible to set up a "fake" reverse DNS to my internet public ip?
I don't want to buy a fixed IP address from the ISP and have them set up rDNS for me, I need to change my public ip ...
- 3
-1
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1
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256
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backward nslookup ip in DNS setup centos 8
I setup a DNS server on CentOS 8.
But the command "nslookup " has not correct output. The output not contains the nameservers which I set for it.
0
votes
1
answer
83
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Reverse DNS for my mailserver returns the (seemingly) wrong information
When I run $ dig my-domain.tld I get the correct IP address, but when I run $ dig mail.my-domain.tld I get back something that looks like this:
;; AUTHORITY SECTION:
my-domain.tld. 600 IN SOA ...
- 133
0
votes
1
answer
106
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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 ...
- 53
0
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1
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6k
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BIND create reverse zone for /21 block
LINUX, BIND9
I have a network which sits in /21 block and would like to make a reverse zone, I would like some guidance to know where to look to create the reverse zone file.
I could make seperate ...
- 1
2
votes
0
answers
54
views
What does strings like "com.google.process.gapps" mean?
I've seen things like com.google.process.gapps in a lot of places, like Android and Flatpak, etc. What does it mean? It looks like a domain reversed.
user936203
1
vote
1
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90
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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 ...
- 473
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1
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944
views
How to tell if a website is using shared hosting or just masking IP address?
When I do a reverse lookup on a certain website, it returns a Dyn IP as below:
C:\Users>nslookup xyz.com
Server: UnKnown
Address: 192.168.1.1
Non-authoritative answer:
Name: xyz.com
...
- 1
1
vote
1
answer
648
views
How to find all IP having a PTR-DNS-Entry for a domain
How to get a list of all IP having a PTR-record for a particular domain, e.g. mail.example.com
Goal is to have a list of IP that
x.y.z.a
x.y.z.b
x.y.z.c
are claiming to serv mail.example.com.
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