The reverse-dns tag has no wiki summary.
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1answer
43 views
want to Request our ISp to do rdns/ ptr modify for my Staic IP ot point to my Domain?
we setup a mail server in our local office using Mdaemon Mail Server . We have a Staic ip 123.xxx.123.xxx ( as an example ) and all necessary ports (80 , 25 , 110 ) are made open .
We have a ...
1
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1answer
40 views
Email home server, SPF & reverse dns questions [closed]
I want to set up my home email server. I've heard that my emails could be marked as spam if there is no SPF record or reverse dns. My ISP is cable TV, I have static ip, and reverse address which is ...
2
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1answer
65 views
Odd entries in DNS lookup log
With BIND (named) enabled on an OS-X Lion iMac, I can get a list of queries as they occur. In the list are some very strange entries, listed below. Can anyone shed some light on these? (Note that the ...
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2answers
81 views
hotmail blacklist and rDNS questions
My company has recently purchased a VPS for email and webhosting. I am not an expert on email authentication but here is my story.
After the VPS was purchased we started receiving bouncebacks with ...
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5answers
114 views
Reverse DNS and mail delivery (550 4.4.7)
I'm trying to fix a problem with mailing in a VPS.
This VPS has only one public IP address and 5 domains hosted. The DNS (Bind) have the 5 different zones configured, every zone has an mx entry to ...
1
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1answer
22 views
Rsync and RDNS won't backup?
Hi I've got a problem trying to Rsync a backup to another server.
I get the error
Address xxxxxxx maps to xxxxxxx, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
The first ...
2
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3answers
97 views
How to configure bind9 to be a local DNS only with no internet access?
I want to configure bind9 to be a local DNS only with no internet access at all. So I have 5 PCs in my virtual domain xy.com. Within this domain there is no access to the internet.
The DNS server ...
1
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2answers
91 views
Network outage - Mapping, Checking network, BGP, Traceroute, RIPE
At first, I'm not able to name my question properly, so this will be adjusted
I recently experienced an international network gap. Mean when some part of world wide network is unavailable.
I'm ...
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4answers
91 views
Delegating a subnet of a /17 in DNS
guys. I have a problem I've run into with our DNS setup at my company. (I'm running BIND9 on a Linux platform, but this is not BIND-specific.)
I need to delegate a /24 reverse zone to another set of ...
0
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2answers
61 views
Reverse DNS for mail server
I have a question about setting a reverse DNS record for my mail server.
Which is the best way to configure:
1.) The IP address reverses to the domain that is sending the email (ie. ...
1
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2answers
104 views
Why Is There A Delay In The SendMail SMTP Banner Greeting When Primary DNS Server Is Unavailable?
CentOS 5.x / SendMail
Hi All,
Normally when I connect to my SendMail server, I see the SMTP banner greeting almost instantly.
I've noticed though, that when the primary DNS server is unavailable ...
0
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2answers
58 views
Reverse DNS with Private NS :: ns1.example.com & website example.com must be on same public IP?
Fairly noobish question, kind of ashamed to be asking ;-)
At any rate, I'm using a commercial control panel (similar to Plesk) that I use to manage DNS. I have ns1.example.com setup with the ...
2
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2answers
66 views
Postfix & client IP reverse DNS
I explicitly added reject_unknown_client_hostname and several other reject rules to slow down SPAM in our server. So far that's working nicely.
However, there is an important client that keeps ...
0
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3answers
78 views
Reverse DNS when sending mail from multiple IP/subdomains
I have site example.com and I want to set an external mail server m1.example.com , most whitelists like AOL requires reverse DNS for all IPs, but in order to fetch the bounces properly I will be ...
0
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1answer
56 views
How to access expired domain website hosted on dedicated server without doing any configuration
I am not sure, this might be a stupid question.
but I would like to know if that is possible. and any website available from where I can do this online.
One of my website is hosted on server i.e. ...
1
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1answer
104 views
Setting up reverse DNS for a /25 block of IPs
I've currently got a block of IPs that go from xxx.xxx.xxx.128/25
Here's my current rDNS setup:
$TTL 12h
$ORIGIN 128/25.xxx.xxx.xxx.IN-ADDR.ARPA.
@ IN SOA ns1.domain.com. ...
1
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1answer
61 views
Windows 95/XP/7 Nameserver File Location [closed]
Where is the Windows version of the Linux file resolv.conf?
I'm currently trying to do a reverse DNS lookup on all ips in the local subnet. My code takes in resolv.conf on Linux to do the reverse ...
1
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1answer
51 views
rDNS multiple IPs same interface
I have three different IPs on the same interface:
eth0 192.168.1.103
eth0:0 192.168.1.104
eth0:1 192.168.1.105
and I have the following in /etc/hosts:
192.168.1.103 host.example.com ...
1
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2answers
86 views
Possible to use double DNS?
Before I used my plesk DNS and found that there is no SPF records in plesk and now I left plesk and started using Godaddy DNS and here I found that there is no PTR records in Godaddy DNS. But I need ...
1
vote
1answer
47 views
Reverse DNS Lookup Zones
I have two domain controllers that act as a Primary and Secondary DNS servers. Server2 is the primary and server1 is the secondary. If I open dnsmgnt on server2 and look at the Reverse Lookup Zones, ...
1
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1answer
49 views
Where did dedicated.abac.net. come from in my rDNS and PTR records?
So I followed this guide to the letter: http://docs.cpanel.net/twiki/bin/view/AllDocumentation/WHMDocs/RdnsForBind
I did so for 3 domains.
When I "test" the records and enter: host 64.150.176.81 on ...
6
votes
6answers
202 views
Should every IP address be reverse and forward resolvable?
Will there be trouble if non-server machines:
1. don't have forward addresses that match in-addr.arpa?
2. don't have forward addresses?
3. don't have in-addr.arpa PTRs?
0
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1answer
100 views
Disable DNS Caching PHP
I need to get the latest A records of a DNS in a script. The script is doing some monitoring operations. The Default TTL of DNS record is 5 minutes, but the monitoring script is running every minute. ...
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2answers
216 views
Email rejected for no rDNS by AOL despite having rDNS
I am having trouble while attempting to send a single email to an aol.com user. I get a rejection reply as follows:
Your message did not reach some or all of the intended recipients.
Sent: Wed, ...
1
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1answer
108 views
How to check current DNS records with Amazon Route 53?
I understand how records are created and deleted but I cannot figure out how to list all set DNS records with Amazon Route 53. I have checked the developer guide and cannot find anything on this. I ...
1
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3answers
325 views
How would I setup reverse DNS for 2 email servers?
I have an interesting DNS question (well interesting to me atleast).
I just installed an hmail server in our remote office to act as an MX backup in the event our exchange server goes down.
The 2 ...
1
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2answers
101 views
How to use the hosts file to make google.com resolve to bing.com on a single machine
I am having a little trouble understanding how to manipulate the hosts file. I am using IIS 7.5 and Windows Server 2008 RC2.
How can I make any requests from my machine to google.com resolve to ...
4
votes
3answers
100 views
What services require properly configured PTR records?
I manage a few DNS servers (Bind9, Windows Server 2008 R2) that are used internally. I have always taken the time to make sure that the correct corresponding PTR records were configured for Reverse ...
0
votes
1answer
275 views
Disable reverse PTR check in Zimbra and force accept from invalid domains
I've moved an older Sendmail/Dovecot system to a Zimbra community edition system. I need to be able to receive messages from certain standalone Linux hosts that may not have valid A records or proper ...
0
votes
1answer
111 views
reverse lookup not working with my own nameservers for any internet address
I have two DNS servers running. With internal addresses it is no problem to look them up both ways:
user@ns1:~$ man named.conf
user@ns1:~$ host vh01
vh01.example.de has address 192.168.180.4
...
3
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2answers
187 views
How are DNS PTR records managed?
As I understand it, an IP address-owner can set up a DNS PTR record for his IP address to map the IP addresses to its host names. There are some things about this I don't understand. I've managed ...
0
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1answer
88 views
rDNS mx record problem, smtp test fails
down vote favorite
I am doing test at mxtoolbox.com
ptr: ip -> mydomain.com
mx: mydomain.com ->myip
but smtp:173.231.15.144 -> OK - myip resolves to myip.hosted.static.hostingfirm.com / Warning - ...
2
votes
1answer
187 views
Reverse DNS not resolving for IPv6 addresses in BIND
Reverse DNS entries for IPv6 addresses are not working. Everything I've read on the subject says the following configuration should work:
In named.conf:
zone ...
1
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3answers
315 views
spam problem related to reverse dns config
I have a client whose ISP recently switched their circuit and static IP to an IP that was already blacklisted for SPAM (nice).
The client is running Windows SBS 2003 with Exchange 2003 and DNS for ...
2
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2answers
130 views
setting the reverse dns for a email server
'm having some trouble with email on a dedicated server, with Windows Server 2008. I've reached the conclusion I have to setup reverse dns for the mail server.
The current setup is this:
The mail ...
1
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1answer
62 views
setting the reverse dns for a email server [closed]
Possible Duplicate:
setting the reverse dns for a email server
I'm having some trouble with email on a dedicated server, with Windows Server 2008. I've reached the conclusion I have to ...
1
vote
1answer
396 views
How to configure Reverse DNS (PTR) records correctly for multiple domains on a single IP
I run a Virtual Private Server on which I host a number of websites using a single IP address. I need to configure Reverse DNS for each domain. Is this possible and what is the best way to go about ...
2
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2answers
105 views
DNS resolving error
I am using a linode running nginx. I wanted to have mail sending capabilities on my VPS, so I change the hostnames and reverse DNS but now I have messed up my DNS somehow and the site doesn't even ...
0
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2answers
189 views
How to setup reverse dns for Virtual dedicated server(godaddy)
I have a problem in resolving the domain and found out that there is a issue with dns settings.
I wanted to configure Reverse DNS for my virtual dedicated server(windows). My isp is godaddy.
How ...
0
votes
1answer
106 views
Mail deliverability rDNS best practice
I have an email server which sends email for multiple websites (different domain names each)
the reply-to will correspond to no-reply@website-a.com (or whatever their username/website is) but the ...
0
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2answers
489 views
My Reverse DNS PTR record seems to be right, but I'm still getting bouncing email
I have a service (statusme.com) where I let people know (for example) that their kid's soccer games are cancelled because of bad weather. We send out emails to the people who have registered.
I have ...
1
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3answers
454 views
SMTP host name vs. domain in “From:” address vis-a-vis Email Deliverability
I'm trying to implement (or make sure that I'm correctly following) email sending best practices to improve deliverability, but the role of the smtp server's host name vs the domain name of the From: ...
0
votes
1answer
65 views
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 ...
1
vote
3answers
855 views
Multiple PTR records
In your experience, have you found there to be any actual problems with having redundant PTR records (same name, multiple IPs) for a given host?
Additionally, would you expect to see corresponding A ...
1
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2answers
250 views
BIND9 reverse DNS, /16 zone
I'm trying to set up a reverse zone for the entire 10.200.x.x/16 subnet. I've configured everything according to named.conf and several different blog posts, but no luck.
Note that the A-records ...
0
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2answers
307 views
Mysql can not resolve hostnames when checking privileges
I'm going crazy to solve this. I have a mysql installation (on machine db.example.org) which doesn't resolve a given hostname. I gave privileges using hostnames i.e.
GRANT USAGE ON *.* TO ...
0
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2answers
598 views
how to add a REverse PTR Record on Amazon Route 53?
if i have the below ip 168.144.254.X and i would like to add a ptr record in amazon in the form of
X.254.144.168.in-addr.arpa what should be in the name field and what should be in the
value field
...
0
votes
1answer
360 views
configure Reverse DNS for VPS with amazon route 53, ISP or Amazon Route 53 issue?
i have a VPS hosted with myhosting.com, the domain is hosted in godaddy and the DNS records are managed in AMAZON route 53. i was told by myhosting support that i should create a PTR record on my DNS ...
2
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3answers
207 views
DNS, should I be using A instead of CNAME?
I'm doing a big reshuffle of our websites and hosting, moving about 10 domains to a new server. In doing so I had to make some changes to the DNS, pointing all of the domains at the new server.
...
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2answers
78 views
Private DNS Question
I received the below request, just curious how I can go about doing this. I have IPs direct from ARIN and my own rdns server.
**
As you guys know I am a mailer, but I keep things very clean. My ...
