The domain name system tree structure or DNS hierarchy has a root domain at the top and all the child nodes in the tree are called sub-domains.

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3
votes
3answers
785 views

Enumerate the subdomains of a given domain - what's the point?

There're a number of security tools out there that enumerate the subdomains of a given domain. I wonder: What's the purpose of that in terms of security / hacking? Is there any way to do that other ...
2
votes
0answers
15 views

Can I use different certifcates for www and Exchange? [migrated]

I have a website www.domainname.com and a published Exchange address of webmail.domainname.com The website is hosted offsite and the Exchange server is on-premises. I need extended validation for the ...
1
vote
2answers
33 views

Security implications of providing users subdomains on my domain?

I want to provide users with sub domains on my website. Users will provide an ip address and the sub domain they want and I will then use a DNS service to redirect to that IP through an A record or ...
3
votes
3answers
199 views

SSL Cert for sub.domain.com and www.sub.domain.com

I have a wildcard cert issued by godaddy for *.domain.com. currently, https://sub.domain.com works just fine. however, https://www.sub.domain.com does not work. Do I need a separate cert for ...
4
votes
1answer
103 views

Wildcard SSL and EV SSL

Is it possible to mix a Wildcard SSL for subdomains and an EV SSL for the www and non-www domain? I know that an EV SSL can't have a wildcard. Example: hello.test.com -> wildcard ssl ...
3
votes
2answers
245 views

Is it safe to point a (sub)domain to my home IP address?

I have my own website and I created a subdomain that points to my home IP address. It is useful for personal things like entering my domain for wake-on-lan and letting my friends enter it to join ...
2
votes
1answer
125 views

Is asking for credentials from a separate trusted domain an acceptable practice?

I know of at least two pages that I would have just assumed were a phishing scheme if I didn't know any better. Serverfault.com is a stack exchange site on a different domain, however if you click to ...
0
votes
2answers
1k views

How could you find wildcard subdomains on websites?

Other than testing different URLs separately, is there anyway to find out if a website has a wildcard sub domain?
1
vote
2answers
195 views

Securely passing critical data to other domain

My company owns a domain A.com , and subsdiary is on B.com B.com redirects their users to A.com for accounts registrations. Post successfull registration , A.com logins that user ( User doesnt get to ...
0
votes
2answers
281 views

Subdomain-only SSL security/availability

CAcert and StartSSL both only validate domains whose TLD is owned by the requester. I have a few subdomains that come from places like freeDNS that I would like to run an SSL-secured server on. Are ...
1
vote
3answers
236 views

Are subdomains a cure for phishing?

Seeing as phishing is getting more popular and users are becoming less concerned about security, I am trying to come up with a solution for a new site of mine that can stop phishers. For instance, any ...
1
vote
1answer
260 views

SSL on domain will affect un-secured sub-domain

I have a plan to buy a SSL certificate for my domain. I don't have much budget so I decided to buy standard SSL with no support for sub-domains. I have a WCF web-service that works on sub-domain. This ...
1
vote
0answers
106 views

secure authentication between subdomains hosted seperately

The web tools we are developing for a client require seamless interoperability with an existing user management sytem and commerce tools (the "mainsite"). The mainsite is built and maintained by a ...
1
vote
2answers
168 views

SSL-certificates for overlapping domain regions?

Suppose, a server hosts https://www.master.com/ and thus is equipped with a (single domain) SSL certificate. Furthermore, suppose there are some web apps below master.com: ...
15
votes
5answers
19k views

How can I find subdomains of a site?

One of the things I need to do from time to time is to find subdomains of a site for example. Starting with example.com sub1.example.com other.example.com another.example.com I'm ...