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Questions tagged [reverse-dns]

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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: //...
Blasto's user avatar
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1 vote
1 answer
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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 ...
user1068636's user avatar
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 ...
b.sullender's user avatar
0 votes
1 answer
292 views

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 ...
jbjo's user avatar
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2 votes
2 answers
14k views

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, ...
Alai's user avatar
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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-...
JamesTheAwesomeDude's user avatar
0 votes
2 answers
693 views

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 ...
gouyez's user avatar
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-1 votes
1 answer
251 views

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.
Arefeh Yavary's user avatar
0 votes
1 answer
79 views

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 ...
HandsomeGorilla's user avatar
0 votes
1 answer
105 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 ...
NermaN's user avatar
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1 answer
6k views

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 ...
Khorem's user avatar
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2 votes
0 answers
50 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.
user avatar
1 vote
1 answer
88 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 ...
William's user avatar
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1 answer
937 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 ...
bAd bOy's user avatar
1 vote
1 answer
647 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.
frlan's user avatar
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1 vote
1 answer
428 views

DKIM and Reverse Dns with sub-domain of onmicrosoft.com

When you sign up with Outlook 365 you get allocated a sub-domain like contoso.onmicrosoft.com. If you send an email from [email protected] should it not automatically be signed with DKIM or ...
sgmoore's user avatar
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0 votes
2 answers
416 views

Which hostname will a web server determine for a client via reverse DNS?

Excerpt from the book I am reading: Most web servers can be configured to convert client IP addresses into client hostnames, using “reverse DNS.” Web servers can use the client hostname for ...
potato's user avatar
  • 103
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 ...
Dani Sarfati's user avatar
-2 votes
1 answer
771 views

How do I create rDNS (Reverse DNS)

How to create rDNS (Reverse DNS), I am using Centos 7.0 and I need to create rDNS for 50 IP's and domain. Can you please guide me how can I create. Example. Example.com - xxx.xxx.xxx.xx0 Example....
Rajeev Ranjan Sharma's user avatar
0 votes
2 answers
4k views

Reverse DNS Zone not working properly BIND9

I am using the 10.0.0.x scheme for my LAN. I have a Raspberry Pi that hosts certain services, including DNS. I am running into a problem with what I think is my reverse zone. The RPI is on 10.0.0.21....
ahyattdev's user avatar
  • 101
0 votes
1 answer
2k views

How do I do remote logging on DD-WRT with rDNS?

Here's what I want to do: I plan on setting up VPN on the router so that I can change the router settings remotely: http://www.howtogeek.com/51772/how-to-setup-a-vpn-server-using-a-dd-wrt-router/ ...
threehappypenguins's user avatar
2 votes
1 answer
4k views

How to configure a 10. network in bind? (PTR)

I'm trying to configure a zone for a 10.0.1.0/24 network. I have rfc1918 zones defined, but then I commented out 10.in-addr.arpa network, since I'm neading it. I then configured a db.1.0.10 file (...
Ninguém's user avatar
0 votes
1 answer
78 views

I need a DNS longer that 40 characters

I try to debug my reverse DNS request subroutine, and I need a DNS that's longer than 40 characters, because apparently that's how many bytes Dnsapi reserves in memory. So I want to see what happens ...
Chris's user avatar
  • 329
2 votes
0 answers
993 views

Is there a way to get NFS to refresh its reverse lookup without restarting it?

NFS server for some reason doesn't seem to acknowledge that avahi/mdns will resolve an ip address unless NFS is restarted after avahi is already running. I have my exports specified by hostname (...
Catskul's user avatar
  • 1,091
1 vote
2 answers
983 views

How to mask reverse lookup for domains?

is there a way to block reverse lookup sites so people can't see the other sites hosted on an IP? Thanks.
Chad's user avatar
  • 11
0 votes
1 answer
3k views

How do I setup a custom hostname for my IRC daemon?

I have a registered domain and I want to make irc.mydomain.com the domain which any public user can access through port 6667. I'm currently running ircd-hybrid but it's only setup to accept localhost ...
meder omuraliev's user avatar