-2
votes
1answer
54 views

DNS hierarchy with bind [closed]

I'm doing a project from class in which I want to simulate a dns hierarchy that works as the global internet dns hierarchy. The structure is like this: Hierarchy So all the requests will be sent to ...
0
votes
2answers
99 views

client's not receveing internet with dhcp. does if i use static

i reloaded my ad, dhcp, dns server 3 day's ago. server 2008 enterprise. and we are having a problem. only the server issue's the ip. all files share's, ad, etc works. can ping and remote desktop ...
0
votes
0answers
33 views

Weird internet/network behaviour - certain sites not available

I've always had this problem where certain websites stop working in a browser. I can then just use another browser. Then at some point these sites would stop loading in all browsers. This could ...
0
votes
1answer
147 views

Unable to access my website even after flushing DNS

I am having weird issues with my website, everyone except me is able to reach my website but whenever I try to login to my website I am getting a Server Not Found issue. The website has never had this ...
2
votes
1answer
1k views

DNS Issue Windows Server 2012

Background: I have a windows server 2012 install with AD, DNS and DHCP. I also have a netopia router/modem providing my WAN access. My router/modem is configured with DHCP off and connected to a 24 ...
-1
votes
1answer
134 views

DNS Error server 2012 domain

We have a server running 2012 essentials as Domain controller and DNS and a few other bits. But over the last few days suddenly all the client computers on the network have lost Internet connection. ...
0
votes
2answers
9k views

Can't ping or reach external IP or domain on CentOS 6.3?

I have installed fresh CentOS 6.3 on my machine. Internet is not working at all. How ever I can ping my router and other computers connected on LAN. I've googled and searched various forums but all in ...
0
votes
1answer
246 views

Domain rebuild from scratch

I have to rebuild the entire domain of a company I just started with. It currently runs SBS2003 but it is "FUBAR". MMC is not working, I cant use the BPA on it. I cant get adprep to work to do the ...
0
votes
1answer
116 views

Access device with local ip over internet

I apologize up front if this is the wrong place to post this question. It seemed like the best fit. I have a device which is connected to my local network which has an IP of 192.168.1.10 from my ...
-2
votes
1answer
87 views

Is setting up BIND DNS required for making server accessible from internet

I have installed CentOS-6 server in our DMZ. I have a public IP address which I will use for it. Now, how should I set up its DNS in order to make it accessible from internet? Is there any particular ...
2
votes
1answer
208 views

Intermittent internet access on a flat network - Router is connected [closed]

I’m looking for some help with network settings. I’ve just started a new job (non-IT!) and we have problems with our office network. I’m the most IT literate in the organisation (15 permanent ...
0
votes
0answers
134 views

How to set up an internet lab with several machines and dns in GNS3

I want to set up with GNS3 an internet lab to simulating real world internet. Basic 5-6 machines with different IP's each IP is a different country and a server that has dns record that all machines ...
9
votes
2answers
271 views

DNSChanger Malware / Rogue DNS - “Internet Doomsday” July 9

Back in late 2011 the FBI dismantled a large and sophisticated internet fraud ring behind the DNSChanger virus/malware. Part of this malware involved directing victim's DNS requests to rogue servers ...
1
vote
2answers
110 views

Root DNS Servers

I understand the root DNS servers (A to M). What I don't exactly get it is the difference between, let's say the "F Root DNS" and the "A Root DNS". Why is there 49 total "F" DNS's and only "A" DNS's? ...
0
votes
2answers
544 views

Trying to host my own domain, using BIND and CentOS 6. Please check my named.conf and zone for errors

delegated the namesever/ip records around 24 hours on the registars website but things aren't working. NAT: forwarding all UDP/TCP requests to internal server IP on port 53 (ISP not blocking) and ...
1
vote
2answers
63 views

Trying to grasp the logic behind a complete DNS resolution and respective sequence of actions

Say we have a domain "example.org" and it has an authoritative name server with name "ns1.example.org" with a glued IP as delegated by domain registrars (delegative?) name servers. Someone types ...
0
votes
1answer
86 views

Can someone explain to me exactly why it's bad to use NS name that is a subdomain for the domain that NS is for

Reading a book and it states that you should not register nameserver names such as ns1.example.com for the domain example.com as you'll create a catch-22 situation when looking up ns1.example.com etc. ...
4
votes
7answers
581 views

multiple internet connection at office

We have been using two separate Internet connections in our office. People will share internet connection by setting their gateways to either of these. Gateway is one of our local server through ...
2
votes
2answers
152 views

Windows Server 2008 DNS Issues with Internet Sites

We are having trouble with DNS. I recently switched internet providers and the problem followed us, at which point I realized our 2008 R2 Domain Controller's DDNS must be the problem. I switch to ...
-1
votes
2answers
172 views

Why isn't the root domain also a name server?

I was trying to understand the inner workings of DNS. To clarify things, when I say the root domain I mean the root domain without a name. So when I type http://www.example.info, it will check the ...
3
votes
3answers
169 views

How can a domain name have no nameservers?

I have found several domains on the internet that have no nameservers, however they have WHOIS records and domain registrars say they are taken. My understanding of DNS on the internet was that the ...
2
votes
1answer
99 views

Mac OS X and Windows clients loses DNS from time to time using a PPTP Linux server

I have a PPTD server (pptpd) running on Debian and my clients are either Windows or Mac OS X machines. I also have an internal DNS hosted at the PPTP server since I want to resolve internal ...
1
vote
1answer
269 views

Is it possible to separate Routing/NAT in conjunction with an internal DNSMasq host providing DNS/DHCP?

It's really great letting DNSMasq take care of DHCP / DNS, as it "just knows" everything... as it should, considering it dished out the addresses to the hosts... However, it seems (to me) - ...
1
vote
1answer
304 views

Break through TCP/IP port exhaution (on Windows)

I'm searching for a setup where one Windows with one ethernet card is able to handle more then 65k open IPv4 TCP connections -- yes, it's not possible per default by the specification. I've found a ...
1
vote
3answers
1k views

Domain Controller not able to do external DNS resolution

We have two DC's on our internal network (one old and one new) we are trying to migrate to the new DC but the only thing stopping us is external DNS resolution does not work with the new DC unless ...
5
votes
3answers
794 views

Two ADSL modems on one LAN

At the moment we have two buildings each with their own LAN's and each with their own internet connection through an ADSL modem, using their own seperate telephone line. Next week we are going to ...
0
votes
2answers
753 views

SBS 2008 - DNS Forwarders timing out

We have an SBS 2008 server that keeps losing connection to the internet approx 2-3 times a day. It's a simple setup, BT Business Broadband ADSL to a Wireless Zyxel router to the server. Clients ...
18
votes
6answers
774 views

Why do Facebook users sometimes end up on my site when they enter www.facebook.com in their browser?

Every few weeks I get an email (usually a very unpleasant one) or sometimes even a phone call from a Facebook user who believes that I am "hacking" their internet. They come to this conclusion after ...
0
votes
1answer
1k views

Networksolutions cname blank alias

Using NetworkSolutions Advanced DNS - I'm able to configure things like: www.mysite.com mail.mysite.com Everything works great, until I go to http://mysite.com - since there is not DNS and it won't ...
0
votes
2answers
301 views

Ubuntu Server and Internet-Connection drops

i have the following problem with ubuntu server 10.04: from time to time the server drops the connection to the internet. i can ping and connect to others in the local network, but i can't ping ...
1
vote
2answers
205 views

What are the internet standards for the CNAME record?

I'd like to know what internet standard defines the CNAME
1
vote
3answers
142 views

Internet Dropping?

I have a virtual DC running DNS and Routing and Remote Access, that routes ALL workstations Internet traffic out to the Internet, this works fine but noticed that the Internet drops occasionally. ...
-1
votes
1answer
395 views

SBS 2008 Users report that they are unable to access some web sites

Users in a Windows Server 2008 domain may report that some web sites are inaccessible, while others work OK. The inaccessible web sites may be in .uk and .eu Top Level Domains or in certain other TLDs ...
2
votes
3answers
2k views

Unable to ping or access internet

I am setting up a private network. The server is Windows 2008 R2 with DNS installed and has a fixed external IP address. ipconfig outputs the following: PPP adapter RAS (Dial In) Interface: ...
4
votes
4answers
4k views

DNS issue on Windows SBS2008 - Some external websites unavailable

Since few weeks, some websites are suddently unavailable. We are getting a 404 - The web page requested cannot be displayed. Basically, the only way to fix this is when I restart the DNS ...