SOA for DNS delegation
Reinderien asked: I’ll first say that what I’m doing now seems to work, though I’m unclear on whether it’s correct. I have a domain registrar company (inherited from a contract) …
How discoverable are IPv6 addresses and AAAA names by potential attackers?
Philip Couling asked: It is fairly standard to receive a significant number of minor hacking attempts each day trying common username / passwords for services like SSH and SMTP. I’ve …
Can I make subdomain of company website only accessable on our company network?
thall24 asked: I have created a WordPress site for our company intranet. I also created a subdomain called intranet.example.com. Is it possible to make this subdomain only accessible from our …
Browser IP failover?
jroza1 asked: I hve read a bunch of the answers here and most of them are dealing with round-robin DNS (RR DNS), but I have a different question. If at …
SPF errors when sending emails
Branislav B. asked: I setup a mail server on mail.mydomain.com. I am able to receive email. Problem occurs when i try to send an email. I have two servers: mail.mydomain.com …
domain name system – rDNS is not exist
Robert Jones asked: I need some help with Reverse DNS as I have got a problem with it. I have setup rDNS on my hosting provider which I use rdns1.example.com …
MX record pointing at apex domain
match asked: I’m currently playing around doing some development on an all-in-one box which is hosting web and mail services (among others), and I have a DNS question I can’t …
MX record pointing to A record with two different IP's
Bruno Tavares asked: So my problem is simple I just need a solid answer so that I don’t break the email service. I have two servers one for mail and …
curl resolves all non-SSL URLs to 127.0.0.1 and port 8080
jotadepicas asked: I’m executing curl and no matter what URL I point it to, it always tries to connect to 127.0.0.1 and port 8080: $ curl -v http://asdfsafzsdfsdf/ * Trying …
Postfix not resolving MX record
pdna asked: Log to=<[email protected]>, relay=none, delay=21311, delays=21301/0.04/10/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=localdomain type=MX: Host not found OS: FreeBSD When I run the …