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/etc/hosts not working on macOS 10.13

OSX Sierra hosts file is ignoredWindows 7 etc/hosts file broken?Why does editing my hosts file to block websites show them as LISTENING?Simulate manipulation of the etc/hosts file in Google ChromeWhy can't I block Facebook using /etc/hosts on Mountain Lion (OS X)?Hosts file changes are not recognized in Windows 8Hosts file on Mountain Lion stopped working suddenlyHosts file redirect to domainWhy isn't /etc/hosts blocking domains after I add blocked sites via launchd?Unable to redirect a website by modifying etc/hosts fileRedirecting domains in /etc/hosts

1

1

I tried to use /etc/hosts file to redirect some websites to localhost.
To do so, I opened it in terminal using sudo nano /etc/hosts then I modified the file, and saved it. As the last step I flushed the DNS cache with sudo killall -HUP mDNSResponder.

Here's what my hosts file looks like:

$ cat /etc/hosts

##

# Host Database

#

# localhost is used to configure the loopback interface

# when the system is booting.  Do not change this entry.

##

127.0.0.1 somethig.com

127.0.0.1 localhost

255.255.255.255 broadcasthost

::1 localhost

This simply doesn't work. I tried to reboot, without luck. I also did a lot of research but did not find any working answers on the internet. Does the OS still use this file, or will this never really work?

I'm using macOS 10.13.

macos hosts-file macos-highsierra

share|improve this question

edited Mar 6 '18 at 18:56

Andrew Morton

2,16121124

asked Mar 6 '18 at 18:42

dnnagydnnagy

10612

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Does OSX Sierra hosts file is ignored help?
  
  – Andrew Morton
  Mar 6 '18 at 18:50
  

  
  
  
  

add a comment | 

1

1

I tried to use /etc/hosts file to redirect some websites to localhost.
To do so, I opened it in terminal using sudo nano /etc/hosts then I modified the file, and saved it. As the last step I flushed the DNS cache with sudo killall -HUP mDNSResponder.

Here's what my hosts file looks like:

$ cat /etc/hosts

##

# Host Database

#

# localhost is used to configure the loopback interface

# when the system is booting.  Do not change this entry.

##

127.0.0.1 somethig.com

127.0.0.1 localhost

255.255.255.255 broadcasthost

::1 localhost

This simply doesn't work. I tried to reboot, without luck. I also did a lot of research but did not find any working answers on the internet. Does the OS still use this file, or will this never really work?

I'm using macOS 10.13.

macos hosts-file macos-highsierra

share|improve this question

edited Mar 6 '18 at 18:56

Andrew Morton

2,16121124

asked Mar 6 '18 at 18:42

dnnagydnnagy

10612

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Does OSX Sierra hosts file is ignored help?
  
  – Andrew Morton
  Mar 6 '18 at 18:50
  

  
  
  
  

add a comment | 

I tried to use /etc/hosts file to redirect some websites to localhost.
To do so, I opened it in terminal using sudo nano /etc/hosts then I modified the file, and saved it. As the last step I flushed the DNS cache with sudo killall -HUP mDNSResponder.

Here's what my hosts file looks like:

$ cat /etc/hosts

##

# Host Database

#

# localhost is used to configure the loopback interface

# when the system is booting.  Do not change this entry.

##

127.0.0.1 somethig.com

127.0.0.1 localhost

255.255.255.255 broadcasthost

::1 localhost

This simply doesn't work. I tried to reboot, without luck. I also did a lot of research but did not find any working answers on the internet. Does the OS still use this file, or will this never really work?

I'm using macOS 10.13.

macos hosts-file macos-highsierra

share|improve this question

edited Mar 6 '18 at 18:56

Andrew Morton

2,16121124

asked Mar 6 '18 at 18:42

dnnagydnnagy

10612

$ cat /etc/hosts

##

# Host Database

#

# localhost is used to configure the loopback interface

# when the system is booting.  Do not change this entry.

##

127.0.0.1 somethig.com

127.0.0.1 localhost

255.255.255.255 broadcasthost

::1 localhost

share|improve this question

edited Mar 6 '18 at 18:56

Andrew Morton

2,16121124

asked Mar 6 '18 at 18:42

dnnagydnnagy

10612

share|improve this question

edited Mar 6 '18 at 18:56

Andrew Morton

2,16121124

asked Mar 6 '18 at 18:42

dnnagydnnagy

10612

edited Mar 6 '18 at 18:56

Andrew Morton

2,16121124

edited Mar 6 '18 at 18:56

Andrew Morton

2,16121124

asked Mar 6 '18 at 18:42

dnnagydnnagy

10612

asked Mar 6 '18 at 18:42

dnnagydnnagy

10612

4 Answers
4

active

oldest

votes

1

I had the hosts and IP addresses separated by tabs, switching to just one space between them worked for me:

127.0.0.1 www3.mytestsite.com

share|improve this answer

answered Oct 6 '18 at 18:43

MrAn3MrAn3

1112

add a comment | 

0

Works for me on a 10.13.3 system.

% grep example /etc/hosts

127.0.0.1 example.com

% perl -MSocket -e 'printf "%vxn", inet_aton "example.com"'

7f.0.0.1

% dns-sd -G v4 example.com

DATE: ---Tue 06 Mar 2018---

10:49:47.455  ...STARTING...

Timestamp     A/R Flags if Hostname                               Address

                               TTL

10:49:47.457  Add     2 -1 example.com.                           127.0.0.1

                               1

^C

However! Some applications (e.g. Google Chrome) may make their own queries to their own DNS servers (e.g. to 8.8.8.8) or applications could easily ignore the /etc/hosts file if they only make DNS requests and do not go through the system resolver.

% host example.com

example.com has address 93.184.216.34

example.com has IPv6 address 2606:2800:220:1:248:1893:25c8:1946

share|improve this answer

answered Mar 6 '18 at 18:54

thrigthrig

63646

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I added one more line: 0.0.0.0 asdf.com Now host asdf.com prints asdf.com has address 64.90.40.65 and dns-sd -G v4 asdf.com prints 19:59:37.634 Add 2 -1 asdf.com. 0.0.0.0 1 Does this mean that my system completely ignores /etc/hosts?
  
  – dnnagy
  Mar 6 '18 at 19:01
  
  
  

  
  
  
  

add a comment | 

0

OSXDaily has a different command set for High Sierra - maybe worth a try...

sudo killall -HUP mDNSResponder; sleep 2; echo macOS DNS Cache Reset | say

or if it's being sticky...

sudo killall -HUP mDNSResponder && echo macOS DNS Cache Reset

share|improve this answer

answered Mar 6 '18 at 19:03

TetsujinTetsujin

15.8k53462

add a comment | 

-1

I had this problem as well. It turns out I forgot to specify the port number my app was running on in the browser URL (e.g. www.mywebsite.com:1234).

share|improve this answer

edited 1 min ago

karel

9,28093239

answered 12 mins ago

Shide FooShide Foo

1

New contributor

Shide Foo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

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1

I had the hosts and IP addresses separated by tabs, switching to just one space between them worked for me:

127.0.0.1 www3.mytestsite.com

share|improve this answer

answered Oct 6 '18 at 18:43

MrAn3MrAn3

1112

add a comment | 

1

I had the hosts and IP addresses separated by tabs, switching to just one space between them worked for me:

127.0.0.1 www3.mytestsite.com

share|improve this answer

answered Oct 6 '18 at 18:43

MrAn3MrAn3

1112

add a comment | 

I had the hosts and IP addresses separated by tabs, switching to just one space between them worked for me:

127.0.0.1 www3.mytestsite.com

share|improve this answer

answered Oct 6 '18 at 18:43

MrAn3MrAn3

1112

127.0.0.1 www3.mytestsite.com

share|improve this answer

answered Oct 6 '18 at 18:43

MrAn3MrAn3

1112

answered Oct 6 '18 at 18:43

MrAn3MrAn3

1112

answered Oct 6 '18 at 18:43

MrAn3MrAn3

1112

0

Works for me on a 10.13.3 system.

% grep example /etc/hosts

127.0.0.1 example.com

% perl -MSocket -e 'printf "%vxn", inet_aton "example.com"'

7f.0.0.1

% dns-sd -G v4 example.com

DATE: ---Tue 06 Mar 2018---

10:49:47.455  ...STARTING...

Timestamp     A/R Flags if Hostname                               Address

                               TTL

10:49:47.457  Add     2 -1 example.com.                           127.0.0.1

                               1

^C

However! Some applications (e.g. Google Chrome) may make their own queries to their own DNS servers (e.g. to 8.8.8.8) or applications could easily ignore the /etc/hosts file if they only make DNS requests and do not go through the system resolver.

% host example.com

example.com has address 93.184.216.34

example.com has IPv6 address 2606:2800:220:1:248:1893:25c8:1946

share|improve this answer

answered Mar 6 '18 at 18:54

thrigthrig

63646

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I added one more line: 0.0.0.0 asdf.com Now host asdf.com prints asdf.com has address 64.90.40.65 and dns-sd -G v4 asdf.com prints 19:59:37.634 Add 2 -1 asdf.com. 0.0.0.0 1 Does this mean that my system completely ignores /etc/hosts?
  
  – dnnagy
  Mar 6 '18 at 19:01
  
  
  

  
  
  
  

add a comment | 

0

Works for me on a 10.13.3 system.

% grep example /etc/hosts

127.0.0.1 example.com

% perl -MSocket -e 'printf "%vxn", inet_aton "example.com"'

7f.0.0.1

% dns-sd -G v4 example.com

DATE: ---Tue 06 Mar 2018---

10:49:47.455  ...STARTING...

Timestamp     A/R Flags if Hostname                               Address

                               TTL

10:49:47.457  Add     2 -1 example.com.                           127.0.0.1

                               1

^C

However! Some applications (e.g. Google Chrome) may make their own queries to their own DNS servers (e.g. to 8.8.8.8) or applications could easily ignore the /etc/hosts file if they only make DNS requests and do not go through the system resolver.

% host example.com

example.com has address 93.184.216.34

example.com has IPv6 address 2606:2800:220:1:248:1893:25c8:1946

share|improve this answer

answered Mar 6 '18 at 18:54

thrigthrig

63646

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I added one more line: 0.0.0.0 asdf.com Now host asdf.com prints asdf.com has address 64.90.40.65 and dns-sd -G v4 asdf.com prints 19:59:37.634 Add 2 -1 asdf.com. 0.0.0.0 1 Does this mean that my system completely ignores /etc/hosts?
  
  – dnnagy
  Mar 6 '18 at 19:01
  
  
  

  
  
  
  

add a comment | 

Works for me on a 10.13.3 system.

% grep example /etc/hosts

127.0.0.1 example.com

% perl -MSocket -e 'printf "%vxn", inet_aton "example.com"'

7f.0.0.1

% dns-sd -G v4 example.com

DATE: ---Tue 06 Mar 2018---

10:49:47.455  ...STARTING...

Timestamp     A/R Flags if Hostname                               Address

                               TTL

10:49:47.457  Add     2 -1 example.com.                           127.0.0.1

                               1

^C

However! Some applications (e.g. Google Chrome) may make their own queries to their own DNS servers (e.g. to 8.8.8.8) or applications could easily ignore the /etc/hosts file if they only make DNS requests and do not go through the system resolver.

% host example.com

example.com has address 93.184.216.34

example.com has IPv6 address 2606:2800:220:1:248:1893:25c8:1946

share|improve this answer

answered Mar 6 '18 at 18:54

thrigthrig

63646

% grep example /etc/hosts

127.0.0.1 example.com

% perl -MSocket -e 'printf "%vxn", inet_aton "example.com"'

7f.0.0.1

% dns-sd -G v4 example.com

DATE: ---Tue 06 Mar 2018---

10:49:47.455  ...STARTING...

Timestamp     A/R Flags if Hostname                               Address

                               TTL

10:49:47.457  Add     2 -1 example.com.                           127.0.0.1

                               1

^C

% host example.com

example.com has address 93.184.216.34

example.com has IPv6 address 2606:2800:220:1:248:1893:25c8:1946

share|improve this answer

answered Mar 6 '18 at 18:54

thrigthrig

63646

answered Mar 6 '18 at 18:54

thrigthrig

63646

answered Mar 6 '18 at 18:54

thrigthrig

63646

0

OSXDaily has a different command set for High Sierra - maybe worth a try...

sudo killall -HUP mDNSResponder; sleep 2; echo macOS DNS Cache Reset | say

or if it's being sticky...

sudo killall -HUP mDNSResponder && echo macOS DNS Cache Reset

share|improve this answer

answered Mar 6 '18 at 19:03

TetsujinTetsujin

15.8k53462

add a comment | 

0

OSXDaily has a different command set for High Sierra - maybe worth a try...

sudo killall -HUP mDNSResponder; sleep 2; echo macOS DNS Cache Reset | say

or if it's being sticky...

sudo killall -HUP mDNSResponder && echo macOS DNS Cache Reset

share|improve this answer

answered Mar 6 '18 at 19:03

TetsujinTetsujin

15.8k53462

add a comment | 

OSXDaily has a different command set for High Sierra - maybe worth a try...

sudo killall -HUP mDNSResponder; sleep 2; echo macOS DNS Cache Reset | say

or if it's being sticky...

sudo killall -HUP mDNSResponder && echo macOS DNS Cache Reset

share|improve this answer

answered Mar 6 '18 at 19:03

TetsujinTetsujin

15.8k53462

share|improve this answer

answered Mar 6 '18 at 19:03

TetsujinTetsujin

15.8k53462

answered Mar 6 '18 at 19:03

TetsujinTetsujin

15.8k53462

answered Mar 6 '18 at 19:03

TetsujinTetsujin

15.8k53462

-1

I had this problem as well. It turns out I forgot to specify the port number my app was running on in the browser URL (e.g. www.mywebsite.com:1234).

share|improve this answer

edited 1 min ago

karel

9,28093239

answered 12 mins ago

Shide FooShide Foo

1

New contributor

Shide Foo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

-1

I had this problem as well. It turns out I forgot to specify the port number my app was running on in the browser URL (e.g. www.mywebsite.com:1234).

share|improve this answer

edited 1 min ago

karel

9,28093239

answered 12 mins ago

Shide FooShide Foo

1

New contributor

Shide Foo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

I had this problem as well. It turns out I forgot to specify the port number my app was running on in the browser URL (e.g. www.mywebsite.com:1234).

share|improve this answer

edited 1 min ago

karel

9,28093239

answered 12 mins ago

Shide FooShide Foo

1

New contributor

Shide Foo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this answer

edited 1 min ago

karel

9,28093239

answered 12 mins ago

Shide FooShide Foo

1

New contributor

Shide Foo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 1 min ago

karel

9,28093239

edited 1 min ago

karel

9,28093239

answered 12 mins ago

Shide FooShide Foo

1

New contributor

Shide Foo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered 12 mins ago

Shide FooShide Foo

1