Translates domain names to IP addresses. DNS stands for Domain Name System.

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SMTP DNS Validation with multiple mail servers behind multiple Public IPs

I know when a Mail server receives an e-mail, it performs a "DNS 3 way check" (I think this is also sometimes called FCrDNS) as a simply test against spammers. The way I understand it to work is as ...
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Changing priorities of DNS and etc\hosts in Windows 2008 R2

The X issue One of our customers have an issue with Oracle DG - sometimes DNS is not responsive and DG connection fails. I decided to add fall back entry in etc\hosts, but it has cons too: DNS ...
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42 views

How to setup a private captive network using Wi-Fi at a tradeshow for in-booth app demos?

We all know trades shows could charge 1,000’s of dollars for basic Internet connectivity. As an app developer what option do we have if you want to show your latest world killing app? We were ...
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How to send email from a network to a subdomain?

Scenario: Network: abc.net1 Mail Server: mail.abc.net1 Exchange email: user1@abc.net1 Internal Server: internal.abc.net1 Internal has own domain: sub.local Has exchange configured: ...
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ISPConfig alias domain not redirecting to main domain

I have domain mydomain.net and now i managed to grab another name for it mydomain.com, but as my main domain works very well i just want to redirect the second domain i got to my first one. Well as i ...
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7 views

Locate Host Name on LAN (DNSMasq on DD-WRT)

I am running DNSMasq as both my DHCP and DNS server on my DD-WRT router. I had thought that DNSMasq was serving hostname lookups from its leases and hosts files, but I have a few machines on my ...
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12 views

Cannot browse to web sites where server is on same router

I have a cable router which provides NAT addresses 10.1.10.X as well as has static IPs on it. My local development computer is plugged directly into the router and so is the web server. The web ...
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1answer
17 views

Web browsers removing slash in URL

I have a URL (http://www.example.com/). Whenever me, a user, or a bot(search indexers) enter (http://www.example.com/Folder) the domain automatically redirects to (http://www.example.comFolder). All ...
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Can the DNS-server in FiOS-provided Actiontec router offer SRV-records?

I'm trying to teach my iOS-devices to print onto the LAN-connected printer here. The manual calls for adding certain DNS-records. On my LAN the FiOS-provided Actiontec-router is providing the ...
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20 views

DD-WRT OpenVPN access DNS not resolving hostnames

I would like to achieve VPN access to my home router running on DD-WRT, so everything will go through VPN and I will access hosts on my home network. The problem is that my local DNS is not resolving ...
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18 views

Access subdomain folder directly from IP address

I have server located under X.Y.Z.C IP address. It runs Apache2. I've added additional domain to it, let us call it A. When I want to add something to it, I have to send files to A subdirectory in ...
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9 views

Invalid hostname in HELO sent by MUA

I have a mail server running exim4 with an ACL that drops the smtp session if the hostname in HELO is an IP address. Exim is configured to do the reverse dns check. The said ACL is the very first one ...
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20 views

Windows (8.1) disable websites temporarily

I'm using windows 8.1 and I want to disable certain websites temporarily. I'm doing web development work on my machine and I do not want certain iframes (to 3rd party websites) to load and/or not send ...
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23 views

The requested URL “/crossdomain.xml”, is invalid.

Every time I try to access the game lobby for a website I keep getting an error. The error only started yesterday and I am confused as to what the problem might be. I believe the problem is caused by ...
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8 views

I need to host several websites on IIS 8 in Windows Server 2012 for public access [migrated]

I have a small server running Win 2012 and IIS and I have a public IP address from ISP. I bought several domain names for my websites. Usually I buy hosting service for hosting my website. Now I need ...
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6 views

Pin Hostnames to MAC Addresses when using Dynamic DNS Updates

I want to start using dynamic DNS updates for an internal system. I'd like the DNS server to pin a hostname to a MAC address so that once the host registers, then the DNS server will not allow others ...
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8 views

Domain unavailable when trying to ping to it? [closed]

I'm trying a help a buddy in need. His domain was stolen and we're trying to set it back to his webshop. When I try to ping the domain I'm getting Unknown host. But when I check his DNS settings it's ...
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18 views

Can't access some websites

I have a networking/dns problem in my laptop. I can't access some websites. For example www.accuweather.com I am using a wireless connection. The issue is just in my laptop. I can access the sites ...
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21 views

Blocking AAAA responses for certain domains

I'm in Ireland, and my current ISP doesn't provide native IPv6 access -- even if I wanted their consumer implementation of it (which is apparently DualStack-Lite). So I'm using Hurricane Electric's ...
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1answer
37 views

Browsers delaying 5 seconds before attempting first dns query

I have a fresh OS install with Firefox. When i open Firefox the homepage (google) takes 5-8 seconds to load. All subsequent pages load instantly. I loaded Wireshark to check if its the DNS server ...
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1answer
20 views

configure router for DNS queries for specific domain

I want to configure my Netgear N-150 router so that it answers DNS queries within the LAN. This is in context of running different kinds of servers: e-mail, news, web or VoIP from home. Nothing is ...
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29 views

Is it possible I would get hacked by using DNS service? [closed]

I heard some people say, it’s possible that some hackers can access PCs while using public DNS service because they’ll be vulnerable to them. However, paid DNS service requires credentials, so it’s ...
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2answers
54 views

OSX: ssh: Could not resolve hostname: nodename nor servname provided, or not known

There are two mac hosts in my Wi-Fi network (laptop and Desktop) I'm trying to ssh laptop from Desktop - everything works fine When I'm trying to ssh from laptop to Desktop doing this: ssh ...
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16 views

DNS Router redirect to private IP

Sorry, If this has been asked before or the question is stupid. I am new to networking. I need a little help. At my home, I have a public IP and a small Cisco router. I am running various VMware ...
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11 views

Is it possible to set up Google apps with just one email address? [migrated]

I am currently using the free trial of Google apps for business. I have a few people using the email for our domain, but I do not want to switch the entire organisation to Google Apps and pay $50 a ...
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2answers
40 views

Connect to my work LAN and ADSL a the same time

The scenario is to connect to my company LAN and an ADSL modem at the same time. My PC has two network cards. one is connected to internal company LAN(no Internet connection) and another is connected ...
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29 views

AD Dynamic DNS not working with Linux IPv6 [migrated]

I have an AD DNS/DHCP enabled server. I have mixed Windows and Linux machines/servers. IPv4 is working great with DNS/DHCP, even for the Linux systems. IPv6 is working great except that it won't ...
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2answers
43 views

Domain name for Raspberry pi

I've a network with a router (TP-LINK) which delivers internet to my PC and laptop. Recently, I got raspberry pi and would like to connect to via ssh. The fact that I'm aware how to set ssh connection ...
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31 views

Cannot open one specific website on one machine

I recently stepped upon a very weird problem. There is a website and mail server running on a domain XYZ.com (example) It is blocked only on one specific pc in the whole company (there are 10 of ...
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19 views

Network with 2 vlan and IP forward

I've got 2 VLAN configured in a router. VLAN1 10.0.1.x VLAN2 10.0.2.x One of my server is on the VLAN2 only. I called it "control-server". From it, I can ping the ip address 10.0.1.4 but not the ...
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13 views

short often network pauses when 2 routers connected

my network looked like that: ISP cable --- ISP modem --- my router --- cable connection to computer 1 \-- wifi connection to computer 2 everything worked ...
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43 views

How to use domain name to point to a web based application [closed]

I have bought a new domain over the Internet. And I have built a Java web based application which is running on Apache Tomcat server in my local system. What is currently happening is its running ...
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19 views

IPAD Air2 PPTP vpn missing vpn dns

User has an IPAD Air2. When he connects to the VPN using his iphone it does not get dns server settings. He is connecting to Windows RRAS as pptp vpn. If I connect with a windows laptop I get all ...
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9 views

sshuttle dns resolution incorrect

I am using sshuttle. When I do not have sshuttle running, I get to www.mycompany.com just fine because DNS resolves to the external IP address, which goes through the switch and to the internal IP ...
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1answer
17 views

Share access to HTTP server on OSX?

I recently became aware of http://docs.vagrantup.com/v2/share/, which enables: HTTP sharing will create a URL that you can give to anyone. This URL will route directly into your Vagrant ...
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20 views

How can I troubleshoot intermittent internet failures over Wi-Fi?

I’m connected to a router in a relatively crowded area via Wi-Fi, and have intermittent Internet issues. When this happens, a direct ping from my computer to 8.8.8.8 results in multiple dropped ...
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1answer
20 views

Using DNS to forward to a specific local address and port?

Im running a server on a local address, a raspberry pi at x.x.x.111:64738. I own a domain, mydomain.nu. I want to create a subdomain (the hosting provides a cPanel interface) and forward it to my ...
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1answer
15 views

Restarting BIND service getting error

When I restart the BIND service getting this error from syslog named[4960]: /etc/bind/named.conf:15: couldn't add command channel 127.0.0.1#953: address in use Even when I execute nslookup ...
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How to connect two debian VMs using vmware workstation so that one acts as a web server and the other as web client

I want to connect two virtual machines running using VMWare workstations - Debian Linux and I have setup private DNS server on one VM named "Server" and other VM is named "client". I am trying to ...
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2answers
29 views

Cascading Routers (LAN to WAN) and DNS

I live in a shotgun style house and thus am required to have to wireless routers to reach every room. The first router is in my roommate's room and has an IP address of 192.168.1.1 with a DHCP pool ...
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35 views

What more user-friendly options are available for overriding DNS than the HOSTS file? [closed]

I've used the HOSTS file for years to override DNS to allow me to view test versions of a site etc. running as if it were live. However, helping others who might want to see the site before it goes ...
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1answer
40 views

SSH Connect to Domain that points to different IP

A bit of background info, first: I have a domain that is configured to run a mail server, iRedadmin, postfix, etc. I can receive and send email and everything works great. The problem lies in the ...
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20 views

Connect subdomain to windows VPS?

I don't exactly know how to go about connecting the 2 together. My goal is to use RDP here on my computer, and when typing in the IP address to connect to, I prefer to type in maybe a domain name, ...
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1answer
44 views

“Connection timed out” on specific website but ping works

I have a problem accessing www.mafiamofo.com website through any browser, I'm getting "connection timed out" in Firefox for example. I have 2 IP addresses from the same ISP. One IP goes directly in ...
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5 views

How do I add an spf for a Postmark App sender signature when there's an existing spf record? [migrated]

I'm using the Postmark App service ( https://postmarkapp.com/) to handle the transactional mail delivery for my web app and I set up a sender signature email address ( welcome@somedomain.com ) for it ...
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1answer
8 views

Add CAA and SSHFP records to TinyDNS?

One of the folks I work with is a fan of Bernstein's TinyDNS, so we run it internally. I'm having trouble figuring to how to add a CAA record and a SSHFP record to the server. There's a page on ...
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1answer
27 views

Dynamic DNS Name to resolve to Internal Server IP Address

I need to setup a DNS route so that the Dynamic DNS Name resolves to the Server when users are connected on the same network as the server, when users use any other internet connection the Dynamic DNS ...
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11 views

DNS or Hostname - seems to change whether a machine can be accessed or not [migrated]

So I work on a large environment with multiple countries and a large DNS structure. Because of this we sometimes have issues where machines that have not been on the network for a while keep the ...
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1answer
18 views

I see frequent PTR requests in my wireshark capture, are they normal?

Lately I've been getting very frequent DNS lookup failuers (I use Google's dns servers) so I set up wireshark to see some of the traffic and I see many PTR requests for IP's that don't seem relevant. ...
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3answers
553 views

Find all current DNS records

I have a domain, its a client's. Their domain needs moving, but the current provider is being difficult/slow in providing details on all the existing DNS records. Plus I have not been able to get in ...