I understand any client applications request queries with domain names will send to DNS server for domain name to IP resolution. But what if the requested queries is IP address only, does it mean the query will not send to DNS server for resolution? I'm wondering if the client applications will make the decision to save a trip to DNS server? Please advise. Thanks!!
Yes.if requested is IP address.client will direct connect to that IP.
You can test this by set wrong DNS server,the IP request still works.
IP address request only go through route.domain request will send DNS query then use answer IP to do request.
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I need to send a fake IP address to a defined server (ip) due to the need for security and distrust in that server. Unfortunately, I have to use this server, but I do not want fake IP to be sent to all servers where I connect. I need it for windows operating system.
Does anyone know how to do this?
Our webapp had a XSS attack today and i work in the monitoring team. My client want to confirm the IP address of the attacker. How to find the IP address of the attacker machine.
Look for the access logs. Something like the apache access logs. Once you have identified the request, take the corresponding IP address.
Bear in mind and check following:
That the IP address is external and not e.g. of your load balancer.
If the IP belongs to your load balancer, check the logs on your log balancer or check the X-Forwarded-For header value.
Most probably the IP address will not help at all, because if the attacker was not stupid, he used TOR or proxy himself to hide his real IP address. All you will get will be the exit TOR node IP address or proxy address.
I have a dedicated server in my office and it has a static IP on internet, now i want to connect this server to a domain and setup mail server on it.
my only problem is how to connect IP and domain?
I have some questions about this but can't find answer by searching, please help me:
If i had to create my own dns server to handle it? if so how to run dns server
to create mail server that reliable by gmail and other mail-servers i had to provide RDNS to my server, how?
Thanks in advanced
Assuming that you have registered a domain already, you add an A record, which specifies hostname and ip address of your server. You don't need to install your own nameservers, if you use services of a DNS hoster. Many registrars, where you can register a domain, also offer such DNS hosting services. However, regardless of who runs the nameservers which are authoritative for your domain, you will still need to add that A record to your zone on the master nameserver. Depending on used service, you may then have to update SOA serial, and issue an update notification to slave nameservers, so they know that they must ask master nameserver for the updated zone - but most DNS hosters do this step automatically.
For reverse DNS, you add a PTR record to reverse zone. The netblock owner is in control of the reverse zone.
The nameservers authoritative for reverse zone are generally different servers than those you put hostname and ip address of your server on, and you will have to use facilities or cooperation offered by netblock owner.
I have the IP address of the DNS server from the WebHost. Since we do not own the Domain Name (Its the client's DN) I would like to query the WebHost DNS directly to see if it works before asking the client to point his DN to the WebHost DNS.
Am I missing something here? I'm kinda confused when it comes to configures online services.
From Windows Command Prompt:
nslookup
server x.x.x.x (put the WebHost DNS IP address there)
www.yourdomain.com (type the name of the domain you want resolved)
quit
I have a domain with wildcard - *.mysite.com hosted on Server1
I am planning to host a sub-domain - sales.mysite.com on Server2.
Is this achievable? If yes I have a couple of questions on this.
How does DNS know to which server to point when sales.mysite.com is requested?
Does all traffic come to the Server1 and then redirected to Server2 if the destination calls for sales.mysite.com?
this is very easy to achieve. you need to configure your dns server that subdomain.mydomain.com points to server 1 and subdomain2.mydomain.com points to server 2. the traffic won't be routed via server 1. it will directly go to server 2. thats how DNS works. In the DNS server for each domain an ip address is stored. you just need to specify your 2 ip addresses the correct way for the subdomains and it should work. more infos you can get from wikipedia http://en.wikipedia.org/wiki/Domain_Name_System