Questions tagged [ptr-record]
PTR is a type of record in DNS system used for reverse DNS lookups (IP address to hostname)
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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 ...
google-cloud-platform
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2
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Setting up email server SPF without access to IP PTR
What is or is there a proper way to set up SPF without setting the IP's PTR?
because I don't have access and want to know if there's an alternative method
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new email send to Outlook.com never deliver but reply on Outlook.com email does
I dont know where i could start. There is the probleme.
If someone send me an email from Outlook.com, i received the email. If i reply, he will received my email.
If i write a new email and send it ...
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How delegate the reverse DNS lookup to another name server?
Consider this scenario:
A VPS server with one ip address (1.2.3.4) running "bind name server" to resolve requests.
An organization which gave that ip address to the VPS server. Obviously the ...
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Multi-view DNS PTR issues
I am seeing some problems with PTR zone resolution, and I can't quite figure out what is not configured correctly.
Summary:
1) I've been delegated authority for my PTR zone (246.237.204.in-addr.arpa,...
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505
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bind9 on server locally for mail ptr record with cloudflare as name servers
I am using cloudflare's name servers for example.com with a cname for www - these are filtered through cloudflare.
In cloudflare, I have an mx record pointing to mail.example.com and a mail A record ...
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2
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3
answers
5k
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How to know if reverse PTR record is correct for emailing purposes
I send emails for [email protected] with my own server. When using dig -x xxx.xxx.xxx.xxx with the IP of my server, I get:
;; QUESTION SECTION:
;xxx.xxx.xxx.xxx.in-addr.arpa. IN PTR
;; ...
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Reverse PTR record lookup not working with dig
As mentioned here, having a Reverse PTR record is key for successful email sending and delivery from one's own server. In order to check if it's correctly set for my server, I tried:
dig -x 111.111....
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1
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BIND9 can't resolve in-addr arpa
I am trying to configure my nameservers to resolve a PTR zone for which we are authoritative. I have several forward zones that work just fine, but when I try to resolve a PTR, the result does not ...
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PTR record won`t update
Currently, my server is running Ubuntu Server. I had the domain "rosresurs.msk.ru". A bit later I've bought a new domain called "rosresurs.net". But when I ran dig command, I saw, that old domain is ...
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How to allow rDNS(PTR) record to point a specific domain?
Maybe it sounds too complicated, but I will do my best to explain. The problem is the following: some domain is pointing my servers IP address. How can I block that rDNS (PTR) record, so I can attach ...
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1
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318
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Delegating reverse dns records - Bind (Ubuntu Server)
I have got a mail server attached to a static provided by my ISP. Our dns service is run by buddyns DNS service because our ISP blocked 53 by default. The DNS service is excellent, but i dont know how ...
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3
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3k
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BIND DNS: how to override RR generated by $GENERATE directive?
I'm running an authoritative nameserver for a reverse /16 zone, where every IP is mapped to a custom subdomain.
This is achieved by a zone file with 256 $GENERATE directives, for example (subnet 11.22....
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553
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How to set reverse ptr in azure Cli?
I'm trying to add reverse ptr on my Azure VM server.
I tried via powershell and now I'm trying CLI direct on Azure panel.
NOTE: My VMs are static ip.
az network public-ip update --resource-group ...
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233
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how to properly configure DNS when server hosting one domain is sending mail from another?
i'm trying to figure out how to properly setup TXT and PTR records in the following case:
- one domain is hosted on the server 1stdomain.com on IP 1.2.3.4
- it uses remote mail server for sending ...
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can not having a PTR record affect website performance?
I moved my ptr from my maindomain.com to my mail.maindomain.com. Now i could swear my website was faster before, but i can't prove it. Could not having a PTR record affect performance in any way? ...
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PTR lookup to authenticate emails
gmx.com and mail.com are using PTR lookup to authenticate emails. For example, I used 1.1.1.1 to send email as from gmail.com to gmx.com, gmx.com would do PTR look up for 1.1.1.1 see if its gmail.com.
...
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1
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4k
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Reverse DNS for multiple IP address with same domain name
We have a setup where our day-to-day email is sent via GSuite for Business and our bulk email (newsletters, etc) are sent through an Exchange server (to avoid Google's sending limits). Both are sent ...
- 111
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1
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Receiving mail from Gmail delayed - PTR issue?
One of our partners receives our mails with noticeable delays. The same mail sent to two addresses under their domain are sometimes delivered at their server hours apart (checked in the actual server ...
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2
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Possibility to synthesise resource records in BIND?
is there possibility to synthesise resource records in BIND, similar as in KnotDNS with following command?
synth_record "(forward`|reverse) <prefix> <ttl> \<address>/<nn>";`
...
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1
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1k
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How to Add Pointer Record in Reverse Lookup DNS Zone (Windows Server)
I want to add a pointer record in reverse lookup zone in windows 2012 Server. The pointer record should point to a delegated zone defined in a forward lookup zone.
I want to answer any DNS query: b....
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Why does SSH report "reverse mapping checking getaddrinfo failed" even when PTR record is set?
I'm trying to setup a cluster using a private network on subnet 10. One machine has two interfaces, one to connect to the regular network and the other to connect to all the nodes on subnet 10. This ...
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Is PTR record needed if SPF record points to IP
If sending email as [email protected] from mail server 1.2.3.4, and the SPF record of mydomain.com set as
"v=spf1 ip4:1.2.3.4 -all"
Will a PTR record do any good? Is PTR required for some e-mail ...
2
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1
answer
1k
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Allow mail to be sent from any subdomain (PTR, SPF, Gmail)
I use a single smarthost as a hub to route all email from my network so that I can pass SPF checks on Gmail. However, although I always send through the same server, the From address can differ. For ...
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4
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Reverse DNS Setup for an IP with multiple domains
I am trying to clarify my Reverse DNS PTR lookup for a domain. I have a server with a single IP addresses and multiple accounts, all sharing that IP address;
My PTR is currently:
24.210.31.in-addr....
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4
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3k
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How do I create a PTR record for my server?
I assumed I would set up a PTR record with my other DNS records, but have been told by my hosting company that "a PTR record should be set up at the side of your server, not as a DNS record in your ...
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SERVFAIL after PTR configuration attempt (BIND 9)
I'm having trouble with setting up reverse DNS.
I own the mentioned public IP addresses.
After making changes to named.conf (added zone "1.198.193.in-addr.arpa" )
options {
directory "/var/...
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3
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Configuring reverse DNS on BIND 9.7.3
I'm seeing the following in /var/log/mail.log
UPDATE :I own the mentioned public IP addresses.
The IP address sending this message does not have a PTR 550-5.7.1 record
setup. As a policy, Gmail does ...
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1
answer
581
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Configuring DNS Server on Windows 2012 R2
I am a newbie at Windows Server Management and am trying to host a website on my Windows 2012 VPS
I have installed IIS, added the site and the site is up and running. The domain is from GoDaddy and I ...
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Is it ever preferable to have a server without a DNS PTR record? [closed]
Other questions on this site explain why it's helpful to have a PTR record, and why it's unhelpful to have multiple of them.
Are there any real-world situations where a server with one or more A ...
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How to create RDNS (Reverse DNS) [closed]
How to create a RDNS (Reverse DNS) in centos or Ubuntu [PTR record]
I searched a lot in Internet and didn't find any solutions. I got a idea it can be done by BIND or BIND9.
In some forum i seen ...
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2
answers
711
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Multiple Domains on one Server IP-Adress
i need some help. I would like to host my own Mailserver with two or more domains. But to dont get blocked on outlook.com for example. I need a PTR to every Mail-Domain to get a correct lookup. Can i ...
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0
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FCrDNS for a mail server that also runs other services (http, ftp etc)
I am learning how to administer productive internet-facing machines and services, and towards that end setting up mail, web, and a couple other services, all on the same box (budget constraints and ...
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1
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No PTR record according to gmail
Recently, I installed iredmail on my VPS and configured DNS records (including ptr). It confirms nslookup:
nslookup zelenin.top
Name: zelenin.top
Address: 191.101.251.182
nslookup -query=mx ...
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3
votes
1
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696
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Best practices for managing the IP addresses you own in DNS and their PTRs?
I was wondering how exactly the big companies go about managing all the IP addresses that their public servers use, especially in respect to setting up correct PTR-records.
This is very important, ...
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1
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2k
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PTR record format for IPv6
What is the difference in the following two IPv6 PTR formats?
4.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0 IN PTR smtp.example.com.
4.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.0.0.a.4.f.7.0.6....
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Configuring rDNS and PTR Record [duplicate]
I know that here was a few questions about it, but they didn't answer my question.
Here is my issue.
I have a mailserver on my dedicated server with full access. In robots I wrote down these lines of ...
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1
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3k
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Outgoing mail fails to be received by Gmail. Rejected because PTR record does not mach forward lookup
My mail server has been sending mail with no rejections from gmail until recently. No changes have been made that I am aware of.
Recently my outgoing messages are failing with an error about a "...
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Format for/creation of PTR and SPF records?
Let's say that I have a server that resides at Linode that I use for my business, mybusiness.com. It has an IP Address of 1.2.3.4, and an A record of myserver.mybusiness.com. I own the domain name ...
- 190
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3
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1k
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FCrDNS With Separate Host and Mail Server
I have an "A" record on my DNS which points to an IP, specifically the IP my website is hosted on. I use a separate IP for my email server. This causes my emails to fail the Forward Confirmed Reverse ...
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1
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1k
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Cant send mail due to PTR Records
I just installed sendmail on ubuntu 14.04 lts and configured a new domain. Somehow I must have overseen a config issue, as google mail is rejecting the message. looking at return message it tells me ...
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554 Bad PTR Record but Record exists and is correct
I'm getting Error messages from my freshly setup Postfix Server about impossible connections like this.
554-kundenserver.de (mxeue005) Nemesis ESMTP Service not available
554-No SMTP service
...
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vote
1
answer
48
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Reverse DNS lookups failing except when specifying my NS
When trying to perform lookups on IP addresses within our IP space, I'm getting NXDOMAIN replies unless I specify my server directly (not just from the local network but from external nets as well, so ...
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1k
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DNS-SD only discovering services correctly after dig -t any
I have several DNS servers configured for DNS-SD. I am able to register services without issue, however when I try to browse I get errors.
I have been testing using dig:
Browsing a local or remote ...
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4
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2
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Delivered to internal network by a host with no rDNS
Recently our emails started going to spam for recipients at Gmail and Yahoo mail.
I ran a SpamAssassin test, and have found the following:
pts rule name description
0.0 ...
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2
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2
answers
877
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Reverse DNS in bind 9 failed and VPS
My Ip address is 1.2.3.4 (single ip for mail and dns server) and my domain name is example.com, I use Centos 7 and bind 9
output of command:
`host 1.2.3.4`
is:
`Host 4.3.2.1.in-addr.arpa. not ...
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2
answers
4k
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multiple ptr record in bind
I'm running some small ISP here and I own couple of IP ranges.
I have given a few public IP addresses to some of my customer and they are running mail servers on them. They have demanded me to add ...
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2
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46k
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Reverse DNS is not a valid hostname [closed]
I help a friend run a server, which includes a mail server. http://mxtoolbox.com reports that our reverse DNS is not a valid hostname.
The reverse DNS currently points to domain.com. Should it point ...
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2
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2k
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Reverse DNS query of public IP returns localhost
I'm seeing this unusual behavior with reverse DNS lookups on this public IP Address: 222.253.228.79. Can someone explain what's going on?
MXToolbox PTR lookup resolved localhost as the domain
ping -...
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8k
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Reverse DNS show cname [closed]
I created a PTR record
but it shows the
this result:
88.7.4.62.in-addr.arpa. 86400 IN CNAME 88.64-27.7.4.62.in-addr.arpa.
64-27.7.4.62.in-addr.arpa. 86400 IN NS ns1.webaservers....
