Clicking any link to the Internet poses a potential security risk. Malicious websites can transfer harmful content or silently gather data. If you are concerned about these risks, you can configure Acrobat and Acrobat Reader to display a warning when a PDF attempts to connect to an Internet site.
You can allow Acrobat and Acrobat Reader to contact selected websites by adding their addresses (URLs) to your list of trusted websites in the Trust Manager preferences. Alternatively, you can allow all URLs. Follow the steps below.
- To allow access to all websites, select Allow PDF Files To Access All Web Sites.
- To restrict access to all websites, select Block PDF Files’ Access To All Web Sites.
- To restrict access to only the websites you specify, select Custom Setting.
- To add a website, type its address in the Host Name text box and click Allow or Block.
- To remove a website you no longer want to visit or block, select the website in the list and click Delete.
- To specify what the program should do with websites that are not in your custom list, select one of these options: Always Ask, Allow Access, Block Access.
Click OK to apply the changes.
If you open a protected PDF and receive a prompt to allow or block a URL, select Remember My Action For This Site. This reply adds the URL to this list.
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