Tagged Questions

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

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26 views

Why is NSLookup returning more than one record?

I am doing an NSlookup on my OSX machine and getting more than one record. 174.0.100.24.in-addr.arpa domain name pointer my-machine.domain1.domainname.com. 174.0.100.24.in-addr.arpa domain name ...
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1answer
9 views

Dig command: Is the output guaranteed to be sorted?

Let's say I'm trying to lookup the IPs mail.yahoo.com, gmail.com and mail.google.com If I execute: dig @8.8.8.8 +nocomments +noquestion \ +noauthority +noadditional +nostats +nocmd \ ...
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0answers
22 views

CNAME and MX records on naked domain

I have a domain (registered with Daily.co.uk) that for quite a while was set up with a CNAME pointed to my friend's webserver which uses dynamic DNS to resolve to his IP, in addition to MX records ...
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22 views

Connectivity problems on website [migrated]

We've been experiencing some connectivity problems on http://www.scirra.com. Running a DNS check: http://dnscheck.pingdom.com/?domain=www.scirra.com We're getting some errors: Delegation not ...
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1answer
44 views

DNS does not work after upgrading to OSX Yosemite

After upgrading to Yosemite I can no longer get online. I can pick an IP address on the web and get a response but DNS is not working. A ping command to google.com will fail, however an nslookup or ...
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0answers
21 views

Random DNS resolution failures

I have a minecraft server setup. I have set my NS records to point to cloudflare's DNS, and I've created an SRV record which points to a CNAME record setup on another one of my domains. This cname in ...
0
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1answer
9 views

Usage of PTR records aside from SMTP verification

Usually, when I create a zone file, I create PTR records so that an SMTP server can perform a reverse DNS query and verify that a hostname matches the actual IP in the A record. Since SMTP ...
0
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1answer
52 views
+50

I cannot access jsfiddle.net

I cannot access jsfiddle.net. My internet connection is PPPOE. I get a 502 error. Firefox says: [Fiddler] DNS Lookup for "jsfiddle.net" failed. This is usually a temporary error during hostname ...
0
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1answer
18 views

Postfix Reverse DNS Lookup: 450 4.7.1 Client host rejected

Postfix seems to be consistently rejecting mails from few servers though PTR lookup for those domains is successful. Please see log below. I have run out of ideas on what we can do to get this ...
2
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0answers
18 views

Able to receive, but not send email over SMTP from VPS. I don't think I'm being blacklisted

The error I get is "421 Downstream server error" or something similar. Up until a few days ago I could send mail without any trouble. I've searched around, and most other people with this problem end ...
2
votes
1answer
20 views

Why some hostNames are not resolved by my browser once dns-reversed?

I have some newby questions about dns. Here are the steps that lead me to those : C:\Windows\system32>nslookup google.ca Serveur : p81-004.pixelweb.net Address: 206.41.81.4 Réponse ne ...
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2answers
24 views

Mac Terminal Hostname problems

Hey I have Yosemite installed with all latest Updates. I use Static IP on the IMac. Now I have a problem. When I open up a Terminal window it appears like this IMac\203975092370517331:~ peter$ ...
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0answers
15 views

using openDNS to override network restrictions [closed]

so I've been using open dns name server for quite some time now (mainly for speed advantage). But now I am more interested in terms of security. I am behind a restricted network that uses OpenDNS ...
0
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2answers
19 views

Can DNS service affect video streaming speed?

I am using a DNS service ( like unlocator.com) in order for me to watch Netflix.com because I am located outside US. Recently, I found that Netflix ( and also Amazon Prime) videos are very slow and ...
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0answers
17 views

Gmail sent messages rejected due to DMARC policy [closed]

I have an aol email account that I set up with my android device using the gmail client. In my gmail configurations I have "Send mail as:" in Settings > Accounts & Import set to reply from the ...
0
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0answers
13 views

DNS Servers Between Two OS

Trying to sync DNS Servers between a Linux server and a Windwos server. Anyone have an idea how to sync an UBUNTU DNS Server with a Windows 2012 R2 DNS Server?
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0answers
19 views

Website hosting - Multiple websites [closed]

Basically, I'm having some trouble understanding the following. I'm currently setting up a shared hosting account and having 2 domains on this (both use the same IP address). One of the websites is ...
0
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0answers
29 views

I can enter my website using internal/public IP, but can't enter using my domain name

Couple days ago I bought another PC just for server purpose. I have already installed Ubuntu 14.04 LTS, LAMP, Mail Server SSH Server (or Service?), also PHPMyAdmin, Webmin and TeamSpeak 3 server. ...
0
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2answers
50 views

DNS Resolving Issue For Mavericks

I am observing a weird issue on my Mac running Mavericks (OS 10.9.5). I am able to browse any website without any connectivity issues. However, when I check my nslookup results, I am observing weird ...
1
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2answers
20 views

How to log DNS queries from my home network?

I want to log all DNS lookups from computers on my home wireless network. What's the best way to do this? Options I know of: Using OpenDNS and let it log queries for me. However, in order to then ...
1
vote
1answer
34 views

Trouble extending a network with bridge

I am currently trying to extend a small computer network between 2 buildings around 1 km apart. The setup looks like this: modem | Dlink router 1 - 192.168.1.1 (antenna connected to LAN port) | ...
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0answers
13 views

Static routes in ISC DHCP

I have an Ubuntu 14.04 server at home running bind and ISC DHCP. Bind is caching from unblock-us.com so that I can get access to US Netflix content. This all works fine. I'm running into trouble ...
0
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0answers
27 views

Router giving wrong dns-ip address for local computer with static ip

Having a draytek vigor 2130n router on my network as a router. It is setup as hdcp server (192.168.0.200 and on) and rest pretty much default (so dns server also) also a windows server on the ...
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votes
0answers
5 views

in Private Network System Can be Traced [closed]

in a Private Netowrk (in Company) if somebody using public DNS IP and Accesssing some Sites which are blocked, That System which he/she is using that can be traced? if that can be traced. how?
0
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1answer
23 views

Configuring an offline mail server on Ubuntu LTS (likely DNS issue)?

So, the idea here is to have people connect to my VM mail server in a LAN scenario, log into a mail account I've set up with inbox contents of my engineering to do some anti-phishing training. My ...
0
votes
2answers
67 views

DNS caching not clearing Mac OSX

Something weird is happening on my machine. I'm waiting on a domain to propagate. I visit the page in chrome and it's not there yet. but if i look at it on another machine, on another ISP, it's there. ...
0
votes
1answer
13 views

How can I point my domain to a host without turning over the nameservers?

I have a domain name on GoDaddy, and a site hosted on Network Solutions. Not my choices -- I'm helping out a family member who already has that arrangement. Currently, the domain's nameserver records ...
1
vote
1answer
21 views

Purpose of serial number in DNS zone files

So a DNS zone file contains an SOA record specifying the authoritative name server, along with some other information such as a "serial number". I'm trying to understand the purpose of the serial ...
0
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0answers
36 views

DNS issue between Subnets

I have the following NET Configuration: ROUTER: IP #1: 192.168.17.1 IP #2: 192.168.8.10 PDC-DNS-DHCP Server: OS: WS2008R2 IP: 192.168.17.2 NAME: M2SCDC01P Domain Name: test.local ...
0
votes
1answer
16 views

How does email routing work?

I want to understand how email routing works. Lets say I am trying to send a message to someone @gmail.com. According to my current understanding, the following steps happen: DNS MX query on ...
2
votes
1answer
39 views

IPv6 Web Site, But Fails IPv6 Readiness Tests

This is driving me bonkers. I have a Windows Server 2012 R2 machine running IIS 8.5. IPv6 is working fine on this machine. All the IPv6 test sites I browse indicate this machine is indeed running ...
0
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0answers
15 views

What's the best practice for having a DNS entry on localhost?

Using Windows 8.1. Coming from the Linux world. I know I can edit the equivalent of /etc/hosts which is C:\Windows\System32\Drivers\etc\hosts (I think), but that seems a bit...inelegant to me. Like it ...
-1
votes
1answer
29 views

Can I set hostname as a DNS Alias?

I'd like to make a local machine available (for domain network) through a www address. To do so I though I could use our DNS and set an alias like www. => MACHHINENAME. Can it be done that way?
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votes
2answers
25 views

Sitecom 300N port forwarding access from lan

I have this modem-router: external IP: x.x.x.x (static) internal IP: 192.168.0.1 now, I have assigned x.x.x.x as www.mydomain.com, app.mydomain.com and svn.mydomain.com on public DNS. on the LAN ...
0
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0answers
25 views

Why is my Linux machine forgetting it's DNS settings?

I am running a Kali Linux Virtual machine, it's based on Debian. I have entered my DNS settings in /etc/resolv.conf but when I reboot or resume the virtual machine the settings are forgotten which is ...
0
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0answers
45 views

Changing DNS Settings: Mac Book Air Mavericks 10.9.5

Re. DNS settings. I currently use Primary 8.8.4.4 Home 8.8.8.8 Network 208.67.222.222, with 208.67.220.220 unlisted. Namebench "speed" test of these recommended DNS numbers labelled as "Primary ...
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0answers
16 views

DNSSEC- Client software

I'm interested in running DNSSEC, not sure how this works. Does DNSSEC need to be supported both on the client and server. I currently have DNSSEC on my domain hosting site and the VPS server but if ...
0
votes
2answers
30 views

email - Can running your own authoritative DNS server mask a dynamic IP hosted email server from being blacklisted?

I'm running my own email server on my ISPs dynamic IP range which is blacklisted. So when I send mail to certain mail server my email is block. When I run the same setup in a VPS, I'm not on any ...
1
vote
1answer
31 views

Is there such a thing as a web browser where you specify host and IP for testing new sites? [closed]

Does any Linux software exist where I can specify a host xyz.com and an IP. The browser will then request a page from that IP specifying that host, no DNS lookup will be performed. I regularly move ...
0
votes
1answer
19 views

How to create a nameserver?

I am hosting my own website at home. I have bought a domain .com and now I have to enter two nameservers. How can I create a nameserver that would point to my IP? I have optical fiber, so I can't ...
0
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0answers
32 views

How to have two different nameservers for the same dns? [on hold]

I am building my own server at home. My internet provider told me that since I am using optical fiber I cannot have a fixed IP address, but they allowed me to have a dns that would always point to my ...
0
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0answers
13 views

How do I access subdirectories from a URL Frame

I'm using Namecheap as my registrar, and I'm hosting my page with Microsoft Azure using a linux instance. The page is hosted at <mysite>.cloudapp.net. If I change the CNAME www record within ...
0
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0answers
30 views

My router bypass the DNS servers I manually entered

I wanted to change the default DNS so as to use OpenDNS ones. I went to the router (192.168.0.1) and then put the DNS adress of OpenDNS in the WAN connection settings. It works and my computer ...
0
votes
1answer
32 views

How to propagate a server's host name on local DNS

I am asking this question because I don't know which network service should do this. I have a lightweight server on my LAN, and its host name is my_server. Now I would like every machine on my local ...
1
vote
1answer
20 views

Generic Top Level Domains: are they catching on yet at all?

Is anyone buying ".club", ".today", ".cool" etc? Is there any way of finding out statistics to watch when one of these begins to approach mainstream use rather than just being a novelty as they most ...
0
votes
1answer
24 views

Add hostname that browser resolves?

My /etc/hosts has an entry similar to: 10.0.1.5 wiki However, whenever I type wiki in Opera, the browser goes searching for the term "wiki". If I include the trailing dot to make it a fully ...
0
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0answers
30 views

Changing my ISP DNS servers

I am using two DNS servers provided by my ISP, one is the primary and the other is the backup. After extensive tests performed by the namebench app I found out the primary DNS server is constantly ...
-1
votes
1answer
28 views

getting my domain name to point to my amazon ec2 instance with wordpress into it

I have an EC2 istance on amazon and a domain name bought on hosting24. Inside hosting24 I did change my dns like this: mysite.org. 14400 IN A myAmazonElasticIP www.mysite.org. 14400 IN A ...
0
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0answers
14 views

Point ip to domain name over wifi/hotspot

Is there any way to point a domain on another IP address over my wifi network or hotspot that i create on my laptop. To get closer: I want domain www.google.com to be pointed to IP ie. 192.168.1.15 ...
0
votes
0answers
11 views

Configuring unbound to resolve resolve on mdns

I am trying to set up my own home DNS server, partly to allow computers without avahi/Bonjour to resolve .local addresses. (e. g. unrooted Androids) I am trying to use unbound for this. Since I know ...