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.
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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....
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Resolve-DnsName resolves hostname of IP, but nslookup fails
There are some IP address that nslookup can't resolve (both on Windows and Linux).
Problem:
I can find the IP of the hostname, but reverse lookup fails.
PS C:\> nslookup.exe somehost2
Server: ...
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How to force Hadoop Daemon or JVM to use given hostname instead of nodes actual hostname
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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 ...
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Bind: (Reverse) zone not loaded due to errors
Using Ubuntu Server and bind9...
Here's the error:
enter image description here
Direct zone:
enter image description here
Reverse zone:
enter image description here
Named.conf.local:
enter image ...
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Unsure on how to fix PTR [closed]
I am trying to setup a custom email for a company website. The only issue is that when sending an email to a gmail account, I get the following back:
The mail system : host gmail-smtp-in.l.google.com ...
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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)...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Fix rDNS record using PostFix and Cyberpanel
My email is being rejected by GMail because:
550-5.7.25 The IP address sending this message does not have a PTR record
setup, or the corresponding forward entry does not point to the sending IP.
I ...
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2 IP's with the same PTR record?
Can I have 2 IPs with the same PTR Record?
For example:
122.122.122.1 with PTR Record mail.example.com.
122.122.122.2 with PTR Record mail.example.com.
Each IP-address is with a different ISP, the ...
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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 ...
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Single server, single IP, mail with other services -- do I need a mail subdomain?
I have a server with a single IP configured to act as a mail server and to provide other services (e.g. http).
DNS records are like:
mail.example.com A 192.0.2.4
example.com MX mail.example.com
and a ...
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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 ...
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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..."...
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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....
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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 ...
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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 ...
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Should I create reverse DNS record for virtual domain?
My server has two domains, example.com and example.org.
example.com using my server to send emails.
example.org is a virtual domain. And it uses Google Workspace(Gmail) to send emails.
I see this ...
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rDNS error on ripe.net
I got 3 errors when I want to add my NS's to ripe.net (domain section):
alarm IP 185.*** in parent refers to multiple nameservers
(ns500.mydom.in;
ns501.mydom.in).
alarm IP 185.*** in child refers to ...
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ns1 and ns2 are in different subnets, do I need two reverse zones?
I will make an example:
ns1.example.com = 172.27.175.64 (local ip address)
ns2.example.com = 192.168.1.10 (local ip address)
(Obviously it is an example and they are with local IP addresses, but in ...
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Traffic to Nginx reverse proxy only from CloudNS through Iptables
I am new to the forum and hope that I am right here with my questions. I am configuring my reverse proxy (Nginx). I want to allow only traffic coming from CloudNS (https://www.cloudns.net). I had the ...
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When does unbound fully drop expired cache
How long it will hold expired cache before dropping it? Is there any way to prefetch expired cached instead of dropping it?
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reverse nslookup attach arpa zone to response
I have an issue that some reverse (PTR) resolution reattach in-addr.arpa zone to response.This is something wrong in the named(bind9) configuration.
Now is :
command : dig -x 10.1.1.107 @dns_server_ip
...
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BIND9 how to have 2 reverse resolutions for 2 different domains
I have one server Bind9 and 2 different domains.
I'ld like to have reverse resolution for each domain.
I've tried this configuration below but I get the error in named-checkconf :
/etc/bind/named.conf:...
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Nslookup server: unknown between VLANs/networks?
I have several VLANs/networks - eg.:
10.0.10.0/24 : Servers
10.0.20.0/24 : Pcs
My DNS server is called "DC1.mydomain.local" (IP 10.0.10.11) and I have a PBX server called SVPBX (IP 10.0.10....
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force mysqld to use etc hosts for reverse lookup
I have a server hosted by hetzner running mysqld.
I already setup some "ddns for poor ones" to add my dial-on IP (Telekom) to the server's /etc/hosts. Now all Users in mysql are limited to ...
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#ASK Reverse Zone: Server Can't Find .in-addr.arpa : NXDOMAIN
I figure it out about reverse zone, so I already config my local DNS with this simple config:
1. named.conf.options
acl internal {
192.168.1.0/24; // data
192.168.2.0/24; // data
...
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Configuring a PTR record in domains.google for an SMTP server
I've found several threads related to this, but they are all very dated so I want to get some clarification.
I use an AWS ec2 instance with an elastic-ip, I've set up an SMTP (sendonly) mail-server ...
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zone file error and named does not start
we have deployed a new zone on our dns :
named.conf for the new zone (like others)
zone "db.0.30.10.in-addr.arpa" {
type master;
file "/etc/named/...
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email validation: is there any point doing both SPF *and* reverse DNS tests?
For a receiving MTA, it seems to be unnecessary to check both the SPF record for an incoming SMTP connection, and to do an rDNS/PTR lookup.
Consider:
Server gets SMTP connection from aaa.bbb.ccc.ddd, ...
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How to disable reverse DNS lookup in Apache 2.2 or in recursive bind
I would like to stop Apache (2.2) from doing reverse lookups for client IP addresses. I have
HostnameLookups Off
and
LogFormat "%h %l %u %t %V \"%r\" %>s %b \"%{Referer}i\"...
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I need to have my 2 websites to have an individual rDNS record but they both are running on the shared web hosting servers
I'm a server noob and want to get some solution or some advice from the gurus of the ServerFault.
I currently have two different live websites running and they both are using the shared web hosting ...
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What should be the rDNS PTR records for a self-hosted email server with a website domain hosted elsewhere? [duplicate]
We have a self-hosted mail server at our business's single, static IP address (mail.companyA.com). Our website is hosted by another company at a different IP address (companyA.com). Our emails use the ...
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BIND9 Forwarding Reverse DNS
I've set up a BIND9 DNS Server. It should only do forwarding:
local.domain1 - forwarders 172.24.16.10 / 172.24.16.11
local.domain2 - forwarder x.x.x.x
internet - forwarders 8.8.8.8 / 8.8.4.4
My ...
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BIND9 server for a network with no internet access
The question I have is the same as this one, but the accepted answer, and the comments did not helped me solve my issue.
I'll put here the whole setup that I have.
BIND9 version - BIND 9.11.5-P4-5.1+...
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Wireshark find DNS response "Refused"
I'm looking for a way to filter a packet capture in wireshark for instances where our server responds with "Refused" to a recursive DNS query.
dns.resp.type== doesn't seem to offer anything ...
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How to confirm who is responsible for serving reverse DNS (PTR) requests an IP block?
Before anyone answers "ask your ISP" or "ask your hosting provider", please read in full.
Scenario:
I own a domain name mydomain.example, and a publically routed IP block (say 192....
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Using NGINX to Access Synology services without port numbers?
First, I apologize if this isn't the right forum as this is somewhat of a networking question.
To give a brief explanation of what I want to achieve is basically have the services or apps provided by ...
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Replace VPS rDNS FQDN with a mail subdomain
I have a VPS with a single IP address and multiple domain names.
I used mail-tester.com to check the spam rate of my email. And my results are:
Your IP address 93.123.12.43 is associated with the ...
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DNS PTR lookup deprecated?
When I use dmarcanalyzer to check my domain I get the message:
Warning : You shouldn't use PTR lookups as they are deprecated
My record looks like this:
v=spf1 ptr:samplemail.com ip4:191.13.174.145 ...
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iprev check for multiple ipv6 addresses
Can I add multiple PTR records mapping multiple IPV6 addresses to the same domain, and add multiple AAAA records mapping the same domain to to the same set of IPV6 addresses, to let pass the iprev ...
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How to set rDNS record for ipv6 address block?
Occasionally, I open a ticket at my VPS provider to let them create a rDNS record for me. Sometimes, I can find a page in my control panel to add the rDNS record myself. This is simple for ipv4 ...
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Domain whitelisting in Kubernetes DNS Service
Can I use Kubernetes dns service to whitelist the domains for my pods? I want to restrict the outgoing (egress) calls using Kubernetes dns service. if I can achieve this, can someone let me know the ...
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Configuring Reverse DNS for an emulated DNS server hierarchy using BIND
I'm emulating a network using Kathara (similar to Netkit) and I'm having trouble figuring out how to get reverse DNS to work across all three networks.
This is the topology
And this is the DNS ...
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902
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Reverse DNS for multiple subdomains
We're setting up a system where each of our users gets their own subdomain of companymail.com for sending / receiving emails, and they can set up multiple mailboxes under that subdomain. We also want ...
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Point a Server Using Domain From Windows Server 2016 [closed]
we have a server machine with Debian 9 installed. It has an internal knowledge base website which the domain is kb.domain.com with the local IP of 192.168.1.95.
Currently we have a new installed ...
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Reverse IP Lookup to Find A Records at IP Address
I want to know if there is a Linux terminal command for getting all the domains associated with an IP address. Or more correctly - find out all the sites hosted on that server IP and/or aall the A ...
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