Reverse DNS

Nominal. Assuming you're talking about the service provided by whois.sc, which is fairly inaccurate. According to that site, we host 40 sites. That is nearly accurate. But since it is based on IP address, if I use a NAT router, the number is too large. If I have many servers, it is too small.

/me wonders if he has totally misunderstood theReason.

-- HW
 
ZiDev said:
Nominal. Assuming you're talking about the service provided by whois.sc, which is fairly inaccurate. According to that site, we host 40 sites. That is nearly accurate. But since it is based on IP address, if I use a NAT router, the number is too large. If I have many servers, it is too small.

/me wonders if he has totally misunderstood theReason.

-- HW
Click to expand...
Its ok to misunderstand me every now and then. ;) I was referring to the reverse dns that people utilize when it comes to email. It tends to be used by individuals that send out a large amount of emails per day. Why is that? What does it actually provide that helps against bounce backs?
 
I think one of the RFCs might refer to reverse DNS for any mail host.
If you have a mail server you really *need* to have reverse DNS setup on it. A LOT of companies will not accept mail from IPs without a reverse entry.

whois.sc is a totally different story
 
blacknight said:
I think one of the RFCs might refer to reverse DNS for any mail host.
If you have a mail server you really *need* to have reverse DNS setup on it. A LOT of companies will not accept mail from IPs without a reverse entry.

whois.sc is a totally different story
Click to expand...
That is what I figured, what is the best way to go about setting one up?
 
And most likely they have and if not you need to revert back to step one and is to email the data center so they can set it up for you. Usualy it needs to be done via in house
 
Hi,
Just to summarize, if you have to ask about it, your NOC should be providing the Reverse DNS records for your boxes. Just email them with what hostname you want assigned to each IP address.

If the rDNS isn't set up, your server may not be able to send mail.

If you need to make frequent changes to your rDNS or have other special needs, you can request that your NOC delegate your netblock to your DNS servers (Arin won't do this unless you have two DNS boxes)

Once your NOC sends in the paperwork, rdns requests will start flowing to your nameservers, and you'll need to set up the PTR records.

Unless you have a strong reason otherwise, I would just let your NOC take care of it.

Regards,
Erek Dyskant
 
TheReason said:
What are the benefits of reverse dns?
Click to expand...

RFC1912 2.1 says you should have a reverse DNS for all your mail servers. It is strongly urged that you have them, as many mailservers will not accept mail from mailservers with no reverse DNS entry.

Rob
 
You must log in or register to reply here.

Supporters

Back
Top