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Questions tagged [reverse-dns]

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.

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Secure sockets, dns and getnameinfo timeouts

just yesterday while debugging my android app i figured out that whenever reverse dns lookup is not possible my connection takes bunch loads of time to initiate (roughly about 20-30 seconds). i managed to narrow down the source to…
Tomasz W
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How to get correct Hostname from reverse DNS lookup using Python?

I need to: Get the host IP from a client request (DONE) Perform a reverse DNS lookup (DONE) Then compare the resulting hostname with the hostname on the Subject Alternative Name (SAN) of the clients SSL cert. (PROBLEM) I need to compare the…
ericOnline
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Reverse DNS and PTR records on Cloudflare

I have server with a mail service running at domain o1.danilocarneiro.com. I use Cloudflare as DNS, so I have configured an A record on cloud flare to 152.67.52.238. This is actually the IP of the server. The problem is because while running…
mafaltti
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Technical issues when switching to an unmanaged Virtual Private Server (VPS) hosting provider?

I'm considering moving a number of small client sites to an unmanaged VPS hosting provider. I haven't decided which one yet, but my understanding is that they'll give me a base OS install (I'd prefer Debian or Ubuntu), an IP address, a root account,…
yukondude
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Can Firebase support reverse DNS records?

I'm setting up a website hosted on Firebase. Currently, I'm using the Mautic for email automation which is currently going to Spam. My technical resource told me it was because I needed to set up rDNS records. Does anyone know if Firebase supports…
Anthony Tran
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Google cloud load balancing and reverse DNS

I have a domain example.com pointing at a Google Cloud load balancer. Requests get served by one of several Compute Engines behind the load balancer. The load balancer ip is 1.2.3.4 Now when I send email from email@example.com sometimes it gets…
Stewart Megaw
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How can I enable reverse DNS lookups with kube-dns on pod IP?

is it possible to do a reverse DNS lookup from one pod to another in the same namespace on Kuberenetes? Setup: Kubernetes 1.5, kube-dns 1.9 When I exec a pod with nslookup I don't get a hostname but only a nslookup timeout like: $ time kubectl exec…
veote
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Reverse DNS with Static IP while using Azure Resource Manager

I am very much aware that Reverse DNS is possible on Azure Cloud Services. That's not what I'm asking about. I need to know if it's possible when using Azure Resource Manager. I've looked around a lot online, and while I've found some (2+ year) old…
Casey Crookston
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Python : Speed up Reverse DNS lookup

I am planning to run Reverse DNS on 47 Million ips. Here is my code with open(file,'r') as f: with open ('./ip_ptr_new.txt','a') as w: for l in f: la = l.rstrip('\n') ip,countdomain = la.split('|') …
UserYmY
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Reverse DNS not working , not found: 3(NXDOMAIN)

i have a vps with WHM installed, and now i try to add rDns , i was following this guide https://documentation.cpanel.net/display/CKB/How+to+Configure+Reverse+DNS+for+BIND+in+WHM but it doesnt work.. my ip address is 192.99.175.224 , and the…
Wawan Brutalx
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Python Sockets: gethostbyaddr : Reverse DNS Lookup Failure

I've been having a problem with getting the host name while using socket.gethostbyaddr(ip_addr) on specific sites. I will not go into detail about which site this is not working for. so getting the host by name works fine for every site I've tried…
Brandon Nadeau
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Beginners Mail Server - Reverse DNS and SPF records

My Question Hello All! Man, I love Stack Overflow :) Anyway, I am configuring my first ever Mail Server and want to do it right. The actual server is configured and working great so just need a bit of help with the rdns & SFP public records of my…
mrmrw
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How to reverse IP to domain and get domains on the same server ?

I'm working on a small PHP website/script, and as one of the features I'd like to be able to run a Reverse IP Domain Check on the current domain the PHP script is running on. I don't know much about Reverse (well, I know what they do, I just don't…
Yassin Sterno
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How can I set up reverse DNS on my Ruby on Rails website?

Thanks in advance for any help you can provide with this issue! For my website, users are supposed to receive an activation email after registering. Some emails are not being received, and they're not going to spam filter folders, either. After…
KDP
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How to verify Bingbot? or is the Bingbot broken?

I just tried to verify the Bingbot and used the rules of this official microsoft blog entry: http://www.bing.com/community/site_blogs/b/webmaster/archive/2012/08/31/how-to-verify-that-bingbot-is-bingbot.aspx This technique works most of the time,…
Lupo
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