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5

$begingroup$

Today I am running Mathematica from a computer that is permanently connected to our university network. Because of a number of reasons, I am not allowed to disconnect my computer from our network.

My conflict is that I have some code I wish to test that depends on whether the computer is connected to the Internet or otherwise. How can I pretend my computer is not connected to the Internet for testing?

I know about $NetworkConnected to check if the computer is connected, but temporarily setting it to False with Block does not seem to work.

As a simple example of code that needs an Internet connection for testing purposes, you can use CurrencyConvert.

web-access internet

share|improve this question

asked 9 hours ago

宮元亜衣宮元亜衣

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宮元亜衣 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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add a comment | 

5

$begingroup$

Today I am running Mathematica from a computer that is permanently connected to our university network. Because of a number of reasons, I am not allowed to disconnect my computer from our network.

My conflict is that I have some code I wish to test that depends on whether the computer is connected to the Internet or otherwise. How can I pretend my computer is not connected to the Internet for testing?

I know about $NetworkConnected to check if the computer is connected, but temporarily setting it to False with Block does not seem to work.

As a simple example of code that needs an Internet connection for testing purposes, you can use CurrencyConvert.

web-access internet

share|improve this question

asked 9 hours ago

宮元亜衣宮元亜衣

2822 bronze badges

New contributor

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

$endgroup$

add a comment | 

$begingroup$

Today I am running Mathematica from a computer that is permanently connected to our university network. Because of a number of reasons, I am not allowed to disconnect my computer from our network.

My conflict is that I have some code I wish to test that depends on whether the computer is connected to the Internet or otherwise. How can I pretend my computer is not connected to the Internet for testing?

I know about $NetworkConnected to check if the computer is connected, but temporarily setting it to False with Block does not seem to work.

As a simple example of code that needs an Internet connection for testing purposes, you can use CurrencyConvert.

web-access internet

share|improve this question

asked 9 hours ago

宮元亜衣宮元亜衣

2822 bronze badges

New contributor

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

$endgroup$

share|improve this question

asked 9 hours ago

宮元亜衣宮元亜衣

2822 bronze badges

New contributor

宮元亜衣 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 question

asked 9 hours ago

宮元亜衣宮元亜衣

2822 bronze badges

New contributor

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

asked 9 hours ago

宮元亜衣宮元亜衣

2822 bronze badges

New contributor

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

asked 9 hours ago

宮元亜衣宮元亜衣

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2 Answers
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7

$begingroup$

You can set $AllowInternet to False (or just turn off your WiFi or unplug the cable).

share|improve this answer

answered 8 hours ago

SzabolcsSzabolcs

171k1818 gold badges467467 silver badges997997 bronze badges

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  $AllowInternet looks like it does what I need, but I did not find this in documentation.
  $endgroup$
  – 宮元亜衣
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  @宮元亜衣 You can turn off accessing the internet using the GUI in the preferences. I believe $AllowInternet does exactly the same (and toggling the GUI toggles this variable too). I don't know where it's documented. It's probably undocumented (but widely known).
  $endgroup$
  – Szabolcs
  8 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  For limited documentation use Names["*Internet*"] followed by ??$AllowInternet
  $endgroup$
  – Bob Hanlon
  8 hours ago
  

  
  
  
  

add a comment | 

2

$begingroup$

A general solution for Windows is to run an application (such as Mathematica) inside a Sandboxie sandbox, for which Sandbox Settings > Restrictions > Internet Access has been set to "No program can access the Internet."

share|improve this answer

answered 7 hours ago

Mr.Wizard♦Mr.Wizard

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7

$begingroup$

You can set $AllowInternet to False (or just turn off your WiFi or unplug the cable).

share|improve this answer

answered 8 hours ago

SzabolcsSzabolcs

171k1818 gold badges467467 silver badges997997 bronze badges

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  $AllowInternet looks like it does what I need, but I did not find this in documentation.
  $endgroup$
  – 宮元亜衣
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  @宮元亜衣 You can turn off accessing the internet using the GUI in the preferences. I believe $AllowInternet does exactly the same (and toggling the GUI toggles this variable too). I don't know where it's documented. It's probably undocumented (but widely known).
  $endgroup$
  – Szabolcs
  8 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  For limited documentation use Names["*Internet*"] followed by ??$AllowInternet
  $endgroup$
  – Bob Hanlon
  8 hours ago
  

  
  
  
  

add a comment | 

7

$begingroup$

You can set $AllowInternet to False (or just turn off your WiFi or unplug the cable).

share|improve this answer

answered 8 hours ago

SzabolcsSzabolcs

171k1818 gold badges467467 silver badges997997 bronze badges

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  $AllowInternet looks like it does what I need, but I did not find this in documentation.
  $endgroup$
  – 宮元亜衣
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  @宮元亜衣 You can turn off accessing the internet using the GUI in the preferences. I believe $AllowInternet does exactly the same (and toggling the GUI toggles this variable too). I don't know where it's documented. It's probably undocumented (but widely known).
  $endgroup$
  – Szabolcs
  8 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  For limited documentation use Names["*Internet*"] followed by ??$AllowInternet
  $endgroup$
  – Bob Hanlon
  8 hours ago
  

  
  
  
  

add a comment | 

$begingroup$

You can set $AllowInternet to False (or just turn off your WiFi or unplug the cable).

share|improve this answer

answered 8 hours ago

SzabolcsSzabolcs

171k1818 gold badges467467 silver badges997997 bronze badges

$endgroup$

share|improve this answer

answered 8 hours ago

SzabolcsSzabolcs

171k1818 gold badges467467 silver badges997997 bronze badges

answered 8 hours ago

SzabolcsSzabolcs

171k1818 gold badges467467 silver badges997997 bronze badges

answered 8 hours ago

SzabolcsSzabolcs

171k1818 gold badges467467 silver badges997997 bronze badges

2

$begingroup$

A general solution for Windows is to run an application (such as Mathematica) inside a Sandboxie sandbox, for which Sandbox Settings > Restrictions > Internet Access has been set to "No program can access the Internet."

share|improve this answer

answered 7 hours ago

Mr.Wizard♦Mr.Wizard

235k3030 gold badges487487 silver badges10891089 bronze badges

$endgroup$

add a comment | 

2

$begingroup$

A general solution for Windows is to run an application (such as Mathematica) inside a Sandboxie sandbox, for which Sandbox Settings > Restrictions > Internet Access has been set to "No program can access the Internet."

share|improve this answer

answered 7 hours ago

Mr.Wizard♦Mr.Wizard

235k3030 gold badges487487 silver badges10891089 bronze badges

$endgroup$

add a comment | 

$begingroup$

A general solution for Windows is to run an application (such as Mathematica) inside a Sandboxie sandbox, for which Sandbox Settings > Restrictions > Internet Access has been set to "No program can access the Internet."

share|improve this answer

answered 7 hours ago

Mr.Wizard♦Mr.Wizard

235k3030 gold badges487487 silver badges10891089 bronze badges

$endgroup$

share|improve this answer

answered 7 hours ago

Mr.Wizard♦Mr.Wizard

235k3030 gold badges487487 silver badges10891089 bronze badges

answered 7 hours ago

Mr.Wizard♦Mr.Wizard

235k3030 gold badges487487 silver badges10891089 bronze badges

answered 7 hours ago

Mr.Wizard♦Mr.Wizard

235k3030 gold badges487487 silver badges10891089 bronze badges