Part of the the Domain Name System (DNS), a hierarchical naming system for discovering IP Addresses in relation to domain names. The Reverse DNS system takes an IP address and returns its configured domain name.
Questions tagged [reverse-dns]
158 questions
30
votes
2 answers
How do you resolve a domain name to an IP address with .NET/C#?
How do you resolve a domain name to an IP address with .NET/C#?
Antonio Haley
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19
votes
2 answers
Android Browser hostnames does not get resolved if domain name is not appended
I am trying open a site hosted on my localhost using machine name in an android browser. When I type in machine name on a desktop browser , it gets resolved, but in an android device I get webpage not available.
Server has been configured to handle…
user1110790
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14
votes
3 answers
How to resolve DNS in Python?
I have a DNS script which allow users to resolve DNS names by typing website names on a Windows command prompt.
I have looked through several guides on the DNS resolve but my script can't still seem to resolve the names (www.google.com) or…
JavaNoob
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11
votes
1 answer
DNS Reverse Lookup with Asio
I would like to do a DNS reverse lookup (return hostname for a given IP Address) with asio, but I am not able to figure out which components I need to achieve this. Asio documentiation refers to ip::basic_resolver::resolve, but an endpoint_type is…
mspoerr
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11
votes
8 answers
Reverse DNS lookup in perl
How do I perform a reverse DNS lookup, that is how do I resolve an IP address to its DNS hostname in Perl?
Joakim
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10
votes
1 answer
DNS record not found after testing
I am checking my website on mxtoolbox.com and getting some DNS errors. Two of those errors say "DNS Record not found". One has dmarc as category and the other is category spf.
My questions:
Does this hurt my website?
How do i go about fixing…
Sjoerd89
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9
votes
3 answers
How to find out hosting provider from domain name?
I am looking for a reliable service that has a good database of the hosting providers vs domain names. I guess some of the domains that are privately hosted cannot be resolved to a definite hosting provider (maybe just to ISP).
I have used…
kushin
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7
votes
5 answers
Convert IPV6 to nibble format for PTR records
I need to convert a ipv6 address to its nibble format for use in creating ptr records dynamically. Here is the information I got from Wikipedia:
IPv6 reverse resolution
Reverse DNS lookups for IPv6 addresses
use the special domain ip6.arpa. An
…
Jason Brumwell
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7
votes
5 answers
SFTP connectivity DNS issue - System.Net.Sockets.SocketException: The requested name is valid, but no data of the requested type was found
I am trying to connect to ftp via SharpSSH as below:
Sftp Connection = new Sftp(ftpAddress, FTPLogin, FTPPasword);
Connection.Connect();
Which results in JSchException:
System.Net.Sockets.SocketException: The requested name is valid, but no data of…
Piotroslav
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6
votes
2 answers
What are Android SyncAdapter contentAuthority and accountType?
I'm creating a custom Android SyncAdapter and hit a snag following the SDK example "SampleSyncAdapter". - I'm creating my equivalent of the xml/syncadapter.xml. Here's the parts I'm confused…
Mitch
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6
votes
3 answers
spamassassin rdns reversedns
Spamassasin gives the following flag on my emails:
*
0.8 RDNS_NONE Delivered to internal network by a host with no rDNS
"This test checks to see if there is a reverse DNS entry
for the last untrusted relay. Note that this may be…
Gleiemeister 2000
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5
votes
1 answer
Customize Docker reverse DNS
I'm looking for a way to change what the reverse DNS resolves to in Docker.
If I set my container's FQDN to foo.bar I expect a reverse DNS lookup for its IP to resolve to foo.bar, but it always resolves to ..
Is there a…
user3099140
5
votes
0 answers
Why is ReverseDNS / getHostName() super slow for some addresses?
We have a problem in a sandboxed Java Applet because the SecurityManager does a reverse DNS lookup. See other question.
But the underlying problem is, that the Reverse DNS lookup takes about 4.5 seconds (without a domain result). The Problem is NOT…
Frederic Leitenberger
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5
votes
3 answers
Why is reverse DNS notation used for package naming?
There is a technical reason for using the reverse DNS package notation? Or is it just a convention?
SimoV8
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5
votes
2 answers
Speed up reverse DNS lookups for large batch of IPs
For analytics purposes, I'd like to perform reverse DNS lookups on large batches of IPs. "Large" meaning, at least tens of thousands per hour. I'm looking for ways to increase the processing rate, i.e. lower the processing time per batch.
Wrapping…
Max
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