Domain Name Service, a method of converting a textual doman name to an IP address

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526 views

Cannot ping localhost

I have setup a new MacBook Pro retina, things were going well but now I cannot access localhost. $ ping localhost ping: cannot resolve localhost: Unknown host My /etc/hosts file is fine, or at ...
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1k views

Ethernet Working but No Internet Connection

In my office, nearly everybody uses Mac and we have just only one Windows 7 system. Just this morning, all the Mac systems (10.8.2) could not connect to the internet but could connect to the network, ...
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1answer
375 views

Cannot Resolve Host

For some reason my system will not resolve hosts added to /etc/hosts. If I add an entry: 127.0.0.1 somename.dev It won't resolve. If I add this, however: 127.0.0.1 somename.dev ::1 somename.dev ...
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3k views

Mac Frequent SSL errors when trying to reach google.com

On my mac, I often try to go to Google.com and chrome gives me an error: "You attempted to reach www.google.com, but instead you actually reached a server identifying itself as www.apple.com. This may ...
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3answers
2k views

nslookup & dig fail; ping, traceroute, and scutil -r work

I'm running on 10.8.2. All of a sudden, traditional nameserver lookups are failing on my machine: $ nslookup www.att.com ;; connection timed out; no servers could be reached $ dig www.att.com ; &...
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3answers
1k views

Cannot use ssh/ping domain name after connecting to openvpn

I've got two macs, both on the same network, both using Tunnelblick to connect to vpn. Both with same settings. Both connect fine and both have the same settings for DNS and search domain applied ...
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1answer
502 views

How to use machine name of iOS devices on network?

I have an iPhone 4 and a 3rd generation iPad. They connect to my local home network over WiFi but I cannot use their machines names. I have an app on both devices that exposes a web server, but I can ...
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1answer
640 views

Using a dyn.com dynamic host name with an AirPort device

I have an AirPort Extreme base station with firmware 7.6.1 and would like to access it remotely using a dynamic hostname registered with dyn.com (e.g. example.dyndns.org). An explanation is given by ...
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458 views

Fast External DNS Servers and My Intranet

The local DNS servers, where I work, stink. They're absurdly slow and often completely fail to resolve web domains during certain periods of heavy sunspot activity. In response, I've just added ...
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1answer
1k views

Ping and curl resolve to one IP, dig/nslookup/host resolve to another

OK, I have a very interesting case. I have a custom DNS server that is vending out IP addresses to varying servers in my test network. If I use dig, nslookup, or host, it tells me that it's properly ...
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1answer
359 views

Local DNS server access delays

Access to a local DNS server is always delayed by ~1 second. I enabled the DNS server on OS-X Lion and it does indeed work. However when I query it using 'dig' (or nslookup) there is a delay of ...
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1answer
897 views

Is it possible to bypass a proxy when the proxy settings are set to Auto Proxy Config?

I've set up Automatic Proxy Configuration (PAC) in OSX Snow Leopard to point to a URL. I've also filled out the "Bypass proxy settings for these Hosts & Domains" box because I want to skip the ...
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49 views

How do I clear Google Chrome's DNS cache entirely?

Chrome is quite aggressive about caching HTTP responses. I assume this is for speed. However, for a web developer such as myself, this can often be problematic, since pages I work on often change a ...
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26 views

DNS resolution got extremly slow after issuing ipconfig commands

I wanted to inspect DHCP messages. To produce them I issued these 2 commands: sudo ipconfig set en0 BOOTP sudo ipconfig set en0 DHCP After that, I am having severe DNS resolution difficulties. It ...
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1answer
58 views

DNS Flush Issue

Not sure if this is the right forum to ask this question. The computer in question is a Mac Book Pro (10.9.5, aka Mavericks). There is a site that in Chrome that repeatedly comes up with its "Aw, ...
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70 views

Terminal command to clear DNS cache doesn't seem to work

I do a lot of website work where I change nameservers for a domain, wait overnight for it to propagate on the host server, then go back to work on the site. Lately, what happens is that I can see the ...
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75 views

Repeat DNS flushing required on El Capitan

I have a mid-2011 Mac Air running OS 10.11.3 and I repeatedly have to run a DNS flush to resolve issues connecting to the internet. This seems to be a recent problem and I don't know what has caused ...
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44 views

DNS fails over time. Reconnecting to wifi solves it momentarily

The DNS lookup fails after some time of being connected. I can get it back working if i reconnect to my wifi. However it seems to happen more frequently. I enabled debugging in the mDNS responder to ...
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167 views

Getting high ping when MacBook Air is connected to Wi-Fi

I have a 13" MacBook Air with Yosemite 10.10.2 installed: As soon as I connect it to my WiFi, I get a very high ping (1600 ms) on both my machines: Windows 7 PC and my MacBook. As a result browsing ...
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105 views

Custom nameservers, /etc/resolver/ and SRV records

I want to use a DNS server on my machine to resolve lookups for all names ending in .dev. I've created /etc/resolver/dev to do this, and checked that it works for A records: › dscacheutil -q host -a ...
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46 views

Macbook Pro 10.10.5 Can Only Connect to Large Sites like Google, StackExchange, Wikipedia

This strange connection issue has been very stubborn. In short, after every reboot I can access the entire internet for a short period of time. After a time (say 30 minutes) all but major websites ...
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1answer
53 views

MBP - have to re-enable Wi-Fi every 30 mins

I have a MacBook Pro running on El Capitan (but the issue was already present before the upgrade, so it's not related). I have the Mac since a bit less than a year. It is still running perfectly but ...
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118 views

How can I get OS X's Dynamic DNS client to register a local IP address?

Background: I'm essentially re-creating Back To My Mac. I have a VPN set-up on my VPS, handing out addresses in the 10.x.y.0/24 range, with BIND running and accessible at 10.x.y.1. There's a zone ...
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126 views

Device name on router is different than OS X hostname

There are tons of questions about changing a Mac hostname, and while I went through most of them, I could never find this nuanced answer: Why do routers always seems to receive the first hostname ...
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4answers
4k views

DNS resolution broken in El Capitan with Thunderbolt Ethernet Adapter on Offline network

After upgrading to El Capitan how do I enable DNS resolution on an offline, internal computer network? Before upgrading to El Capitan I could connect to my internal network, set my DNS and search ...
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91 views

VPN connects, IP won't change : traffic issue

I spent too much time on this, so I'm asking you guys if you can figure it out. I can connect to my VPN, but my IP won't change (I can access the internet) and since P2P isn't working I guess the ...
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357 views

mDNSResponder no longer resolving DNS with avahi-daemon

Since upgrading to El Capitan, I can no longer resolve DNS entries via mDNS if the host is a Linux system running avahi-daemon. For example, I have a server that's available at media-server.local. ...
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1answer
2k views

Make `hostname -f` return fully qualified hostname

How can i make hostname (i.e. the unix commandline tool hostname, invoked in terminal) return a hostname including the domain information? At the moment, hostname, hostname -f and hostname -s return ...
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34 views

DNS resolves incorrectly, even after purge

After changing a CNAME record on my DNS server, I am seeing issues with the DNS on my Macbook Air running OS X 10.10. Other computers on the same network resolves to the correct, new IP. $ host beta....
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79 views

OSX Flush DNS without sudo

I have a Mac that keeps messing up its DNS (this may be a wider network issue, we have windows clients that are having problems too). Whilst I try to understand the DNS issue I'd like to set an 'icon' ...
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1answer
504 views

OS X 10.10.3 connects to wireless router but unable to resolve domain names

I can connect my daughter's MacBook to the wireless router but not browse the internet with two different browsers (Firefox and Safari). This is a recent development as she has successfully browsed ...
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1answer
66 views

OS 10.10 not connecting through proxy specified by its Internet name

My office proxy has always been specified with its IP address and everything worked fine. However, recently, the proxy was changed to use its Internet name, in the form xxxx-y.zzzz.com Since then, I ...
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641 views

yosemite DNS resolution woes over IPSec tunnels / VPN

I am connecting to a Cisco IPSec tunnel from MacOS to a hosted pfsense box that is running a number of other IPSec site-to-sites happily, and the DNS resolution is not working. I also am in full ...
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368 views

Yosemite: ssh slow to connect when using DNS alias

Since updating to Yosemite, ssh from my Mac to a DNS alias takes about 7-8 seconds. I've observed the following on multiple Macs running Yosemite. Assume I have a host name alpha, and a DNS alias to ...
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136 views

How can I prevent hostname from changing?

When I boot up one of our computers it gets a static DHCP address which is specified in our DNS as client1.domain.com and so on. The hostname sets automatically from reverse DNS at bootup and ...
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2answers
909 views

Why is my hostname resolution taking so long?

Several months ago I noticed that my text editor (emacs) and IDE (IntelliJ) were taking a really long time to start up. The time appeared to vary based on the DNS servers OS X was using. I was able ...
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25 views

Mac OS X Panther Server DNS settings

How do I change change the DNS time to live, TTL, settings using Mac OS X Panther Server?
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443 views

How to set custom DNS settings?

I'm trying to set my Macbook Pro to use Google's public DNS, but when I go to the DNS settings (System Preferences > Network > DNS) it will enter the new IP address but then immediately reverts it to ...
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2answers
378 views

iOS network connectivity on a local, isolated network with no DNS server

I have a problem with configuring my iPad to work on a local, isolated Wi-Fi network that does not have a DNS server on it. The problem is in how to convince the iPad that it is actually connected to ...
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1answer
62 views

Apple Developer DNS Broken

I'm trying to create a developer account at developer.apple.com, but every time I click "Register", it says the server at developercms.apple.com couldn't be found. Is this happening to anyone else? ...
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2k views

Authentication Server could not be contacted

Our OS X Server machine has had no issue at all with being in the Windows AD domain right up until we updated it to OS X 10.10. Now it behaves bizarrely, refuses to connect to our Exchange mail server,...
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530 views

iOs Simulator ignoring Hosts file

I'm actually working on a website development and I configured all the needed hostname on my /etc/hosts files. Actually in our office we use an internal DNS for the QA servers and we override ...
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196 views

Does the Airport Extreme support wireless roaming and guest network?

I'm looking to purchase two Apple Airport Extreme base station units to use as wireless access points only. They will be connected via Ethernet to my network closet. Internet gateway is handled by my ...
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91 views

Changing /etc/hosts not getting affected

I have added the following line in my /etc/hosts: 127.0.0.1   myapp.corp.com so my full /etc/hosts looks like: 127.0.0.1 localhost 127.0.0.1   myapp.corp.com 255.255.255.255 broadcasthost ::1 ...
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161 views

Back to Mac service when using Unlocator DNS

I have a Mac Mini at home that I would like to connect to using the "Back to my Mac" service. Normally it works just fine. But if I update my Apple Airport Extreme with DNS from unlocator.com (or ...
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1answer
397 views

Troubleshooting DNS

I'm having a weird problem where the system-wide DNS resolution doesn't work, but I don't know how I could fix that, or even find a log (coming from Linux). I manually configured 8.8.8.8, 8.8.4.4 as ...
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188 views

DNS Lookup Failure on Terminal Only (Mavericks)

I recently did a clean install of Mavericks, and ever since I have, I've been having intermittent DNS lookup failures on the terminal only. Browsers work fine (Chrome, Safari). But nothing works ...
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193 views

What methods exist to give an iPhone an external hostname, on wifi or cellular data?

I want to give my iPhone (iOS7) a hostname, which will automatically resolve from anywhere as long as the phone is online. My iPhone can be jailbroken as part of the solution; that's not preventative. ...
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19 views

How can I send an email from within iCloud.com using a different email address? [duplicate]

I have my own private domain hosting solution with email, for example, test@test.com. When I am using the iCloud.com website from my browser, let's say for creating a spreadsheet, I will want to shed ...
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1k views

How should I configure my VMware Fusion VM network connections?

I've been a long time user of VMware Fusion on my iMac and I've just bought a MacBook Pro to allow me to work on projects whilst I'm away from my desk. On my iMac, I have a few VMs, each with their ...