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Questions tagged [reverse-dns]

Reverse DNS lookup is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.

Reverse DNS lookup or reverse DNS resolution (rDNS) is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.

Computer networks use the Domain Name System to determine the IP address associated with a domain name. This process is also known as forward DNS resolution. Reverse DNS lookup is the inverse process, the resolution of an IP address to its designated domain name.

Source: Wikipedia.

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Are IPv6 forward and reverse maps required if they match the ipv4 addresses when using bind9?

Using bind 9.18, my named.conf has something like this: zone "my-domain.com" { type master; file "/usr/local/etc/namedb/master/my-domain.com.zone"; }; zone "32/29.114.115.116.IN-ADDR.ARPA" { type master; file…
Gary Aitken
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How to force Hadoop Daemon or JVM to use given hostname instead of nodes actual hostname

0 I have 5 nodes hadoop cluster with different fqdns with domain xyz.com like node1.xyz.com, node2.xyz.com ... node5.xyz.com, its hostnames are configured with this domains, so if we write hostname command inside linux terminal it returns…
Uddhav Savani
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GCP/Google DNS: delegate a subdomain and set PTR records on VM instance

I am having a hard time figuring out what steps are needed to set a PTR record on a VM since I want to run a mailserver on it. My scenario looks like this: (unfortunately because of planned migration) I have two GCP accounts and therefor two…
mr.szop
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Windows DNS - Reverse resolution not working for public IPs

I was troubleshooting an internal application when I discovered that the reverse lookup only works for internal private IPs. Is there a way I could configure our Microsoft DNS servers (Win2016) to use the forwarder servers to resolve every rDNS…
YaKs
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DNS Zone has no address records (A or AAAA)

Whenever I run systemctl start named.service I get the error: zone example.com/IN NS 'linserver-1.myco.example.com.example.com' has no address records (A or AAAA) Now the confusing thing for me is that even though this failed, I'm still able to ping…
Ryan West
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site ssl on nginx server only working in incongnito mode but normal browser

My main site is hosted on a cpanel and working perfectly abc.com x x x x ip I have added on subdomain in main site pointing to my vm where i have setup nginx server which point to another vm where our main software is running. mm.abc.com x x x x…
Shakeel Ahmed
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Where to setup reverse DNS for email server

I plan to host my own mail server on a VPS. I understand that I need to set up a reverse DNS entry to prevent commonly used mail services from categorizing my email as spam. Where should the reverse DNS be configured? On the VPS or on my domain host…
mr_js
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BIND9 local reverse lookup with public IPs - is the setup broken or is the setup faulty?

We are having a prelaunch-site to test DNS (and other services) before going hot. I've never involved public IPs here previously and it may not work as I've intended. We have a /29-net from our ISP that are public IPs. 121.24.124.144/29. To test our…
Joppe
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Subdomain to another NS than domain NS

I have a domain from netfirms, with nameserver on reliable dns. But one subdomain I wonna send to rackspace server. So what I should do, change "A" of subdomain to IP of rackspace server or add rackspace ns to the list of reliable ns I already have…
Igor Golodnitsky
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Email goes to spam even with valid SPF, DKIM and DMARC records, dynamic rDNS on AWS instance

I have an instance on AWS and fighting with sending emails through cPanel. All records are OK (checked on MX toolbox): SPF, DKIM, DMARC at the cPanel level and the WHM level (hostname). Even rDNS is OK. Server IP is not flagged or blacklisted…
Adrian P.
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Name server change, impact analysis and down time - worst case

The company I am working for is changing the name servers our registrar points to and wants a complete impact analysis in worst case scenario to impacted systems. I know if we update the TTL's and wait approx 48 hours for replication and then…
axawire
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Pinging NGINX with virtual hosts returns the wrong domain name

Just as the title says - I'd like to know how to specify either: How to return the domain that is pinged (e.g. if I ping "test.com" I get something like "64 bytes from test.com...", or same for whatever domain I ping. One domain that I specify,…
jfacemyer
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Can't connect Namecheap domain to VPS server

I recently bought a domain name from Namecheap (pythonbiz.com) and I set up a web app on a VPS hosted at servercheap.net (a Ghost blog which is basically a Node app), the VPS public IP address is 107.152.32.52 and the app is served through nginx. I…
Annis99
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Strange delayed bounce to Gmail user sending to an alias on my system that expands to other Gmail addresses

Config: Postfix on a Linux machine, static broadband address but because it's residential service, the provider will not provision reverse DNS PTR records for us. We're working on alternatives, but the system has been running like this for 2 years…
Kellarnen
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Should I create reverse zone in bind9 if I don't have authority over the ip address?

But I don't manage the ip address blocks... I have 2 dedicated servers each in different data centers the first provider offers me a panel to configure the reverse zones myself, in this case if they are already configured, should I also assign them…
Andrés Alvarez
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