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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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nginx proxy_pass only when rdns resolves correctly

I have a nginx server on PC_A running as a proxy for a website hosted on PC_B. The server on PC_A provides rate limiting, buffer and cache services for the website. I would like to enable DNS lookup on PC_A and allow access to the server on PC_B…
JayD
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DNS, nameserver and domain on the same dedicated IP - PTR record for nameserver?

My dedicated IP: xx.xxx.xxx.59 Am I doing this correctly by having 2 PTR records (ns1 and domain) for my IP? Reverse DNS Zone file 59.xxx.xxx.xx.in-addr.arpa.db $TTL 86400 @ IN SOA ns1.example.com. admin.example.com. ( …
Myroslav Tedoski
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How to remove DNS Resolution in Haproxy

I have got in a situation where hosts mentioned in the haproxy are resolved into it's ip and sends the request. But in host's server, where they have configured to receive request only with the host as name say "ug1.firstlink.com:367/yts/display"…
susil95
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Why create a reverse DNS record for every device that connects to a wireless network?

There's this network I connect to often. After some experimentation, I figured out that when you connect to the network, the DHCP server assigns you an FQDN that usually follows the scheme .subdomain.sld.tld (obviously the DHCP server…
kimbo
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Understanding TTL field of PTR record returned by dig client

I have some doubts about working of DNS in general - even given the fact I have theoretical base. let's consider a following output: [user@host ~]$ dig google.com [...] ;; ANSWER SECTION: google.com. 102 IN A 172.217.3.174 [user@host ~]$…
DNS question
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How to set up a reverse mapping zone for a personal domain?

I've been trying to figure out how to set up a reverse zone based on an already existing forward zone, but I keep getting an error saying server can't find xx.xxx.xx.xxx.in-addr.arpa: SERVFAIL whenever I try to run an IP through nslookup. Here's the…
Al Fney
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Server DNS Resolve issue

So I'm currently using VMware Pro 12 for the purpose of a lab environment. The problem I have now is that on my domain controller I can't ping my client, although the client is configured properly. As a network adapter I use bridge mode. The IPs are…
Abdi
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How to show another domain for a reverse lookup

Today when someone do a reverse lookup for my website ip address, it gets my hosting server name (ie. server1.hosting.com). Instead, I want to show the hosted website domain (ie. mywebsite.com) Can I set some kind of alias on the DNS zone to do…
Michel Curti
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What hostname and rDNS should I choose?

What should I set as hostname and rDNS? 1 server 3 domains (domain1.com, domain2.net, domain3.de) 1 mail server for each domain My current settings: /etc/hosts 127.0.0.1 localhost 11.22.33.44 domain1.com 11.22.33.44 www.domain1.com 11.22.33.44…
John Doof
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some emails do not send because wrong IP of destination mailserver

in my postfix log files I found a strange thing. some domains resolve always to the same one IP address, but not every time. Just sometimes. Oct 28 14:51:46 maxi postfix/smtp[4057]: 5628514640F0: to=, relay=none, delay=88712,…
Max Muster
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How Reverse DNS works?

I was reading pretty a lot, but still can't get it. For example we have example.com, 127.0.0.1 and 1.0.0.127.in-addr.arpa for example Forward DNS is simple. example.com points to 127.0.0.1 What is 1.0.0.127.in-addr.arpa and how does 127.0.0.1 would…
regs
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Have issues in reverse lookup

I need assistance in a reverse lookup issue. I have a server say XYZ.ABC.COM having an IP 10.20.30.40. If I ping the server, it is resolving to the correct IP. On reverse ping (i.e ping -a 10.20.30.40), it resolves to the domain name and not the…
Dragan Kidovic
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e-mail RDNS lookup

I'm getting lots of junk "return to delivery" mail on my server, so I would like to add this "RDNS" lookup thing in Ubuntu. But I can't figure out how. Most documentation is about regular DNS servers.
Jelle De Loecker
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550 Requested action not taken: mailbox unavailable

I setup a small box with Server 2003 64bit to be used as a webserver and email server for a small school. Real simple stuff for a few users. A simple website and a handful of emails. rDNS and spf records setup and pass every test I found including…
Porch
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Set up reverse dns for anti spam?

I have a VPS LAMP server using Ubuntu with linode.com. I'm using postfix as the MTA to do mailout. All my emails, when sent to Yahoo, are flagged as spam. I want to implement reverse dns to see if it will resolve this issue. Can someone…
John
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