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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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Reverse DNS lookup doesn't match hostname

There's a service on our local intranet that depends on the hostname mapping to the ip address, it is failing for a centos host inside of a virtual machine. I have set the virtual network adapter as bridged. ➜ ~ dig +short nikhil-vm 172.27.12.134 ➜…
nikhil
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Reverse DNS / PTR with Fasthosts shared hosting enviroment

I'm not that clued up on all aspects of DNS so apologies if this is a stupid question of sorts. Basically I have a VPS with one provider(Xeneurope) and the domain names with another(Fasthosts). Not ideal but its what I inherited. Anyway for the most…
cosmicsafari
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Providing reverse records for records that map to ISP IP

I have been instructed to use my ISP ip (as a temporary fix for mapping my name server and domain records as my router dishes out rfc 1918 adresses to devices in my network where I am running an Ubuntu server, my router and my development laptop…
thejartender
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domain/IN: has no NS records

I have set up a home web server using Ubuntu 12.10 and I can safely say that it works with regards to router forwarding and ports being found. I know this, because switched my hosting provider's VPS SOA record to use my ISP IP with an 'A' value and…
thejartender
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Will PTR records for IP's that relay mail?

I am having some spam issues with my mail server. I have multiple servers that are relaying mail through my mail server. I am wanting to know if PTR records for these servers will have any effect with regards to recipient mail servers marking mail…
liamTc
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Reverse DNS is finding someone else's domain

When I do a reverse DNS of my IP address I'm finding a different server name? This isn't my domain name. I was testing my mail server and it gave that warning. How do I fix it? $ nslookup Default Server: Address: 192.168.16.1 >…
Chloe
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Reverse DNS Resolve for MX record

I've two servers running, one is a webserver and it's A record on my (external) DNS provider is in the form of: example.com in A XXX.XX.XXX.171 The other is a mailserver and it's A record is in the form: mail.example.com in A XXX.XX.XXX.170 and it's…
Bruno Vieira
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Creating reverse DNS entries which resolve

Possible Duplicate: Reverse DNS - how to correctly configure for SMTP delivery I ran a DNS check and ended up with the following error: FAIL: Found reverse DNS entries which don't resolves IP-IP-IP-IP.HOST.DOMAIN.TLD → ??? All IP's reverse DNS…
Tiffany Walker
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DNS setup: server1-> CNAME to server2 -> IP address without website being visible on server2

I've been trying to figure this out for a while. I've been googling but I couldn't really figure it out. I have bunch of VPS's for my clients. Each has its own IP address, with a single website on it, and its own domain name which the client…
jason
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Reverse DNS for two ADs in the same subnet

I currently have two separate AD forests that exist within the same subnet. The two forests have independent copies of the reverse lookup zone for that subnet. Example: Domain A DC1: 10.1.1.1/24 Domain A DC2: 10.1.1.2/24 Domain A…
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"Reverse lookup" in DNS zone text file

Is there an existing tool or a cool or interesting way to find all items in DNS zone file, which are "resolving" to given IP? (not using any DNS server at all) For instance, we might have following not very well organised DNS config: …
mykhal
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Sub-delegate Reverse DNS Performance?

I am currently working on a network with multiple subnets. So far I have implemented one reverse DNS entry that is a monolithic 10.* record covering everything. Is there any benefit or performance boost for creating a granular structure allowing…
GMitch
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RNDC: Connection Refused

Just got myself a new VPS, not the first I can assure you. Upon adding any DNS entry, I am prompted with this: WARNING: key file (/etc/rndc.key) exists, but using default configuration file (/etc/rndc.conf) rndc: connect failed: 127.0.0.1#953:…
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Emails sent from our mail server are being detected as Junk/Unsafe

Possible Duplicate: How to send emails and avoid them being classified as spam Email postfix marked as spam by google I'm having a few issues sending email from our mail server. Most seem to work, but some addresses are getting picked up as…
MercJones
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How do I delegate reverse IP to my name server? Who do I contact?

Who do I contact, and how do I figure out who has my reverse IP namespace? I need to update the reverse lookup record, and potentially have it hosted on my own DNS server. For what it's worth, we have a Class C.
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