Most subscription websites keep their content locked, only allowing subscribers access. When visiting these sites on a campus computer, the site provider recognizes the computer's IP address and Penn affiliation and unlocks the content.
On a personal device, the site gatekeeper does not recognize your IP address, so you are asked to pay for access. The solution is to connect through a library's proxy server. The proxy server's IP address is recognized by site gatekeepers as affiliated with the University.
Start your research on the Biddle Law Library's website or the Penn Libraries website.
All the e-resource links on the library sites contain the libraries' proxy information that routes users to the Pennkey login page.
There are many other options to access e-resources off campus described in this guide.
Once these bookmarklets are added to your browser, access to library resources is one click away.
Browse to your resource first. Then click the browser bookmarklet to prompt PennKey login page.
Each Web browser handles bookmarklets differently. See instructions below.
Note: The bookmarklet works for Biddle's licensed databases only. For accessing Penn Libraries' databases, you need to install Lean Library.
Right-click the link, and select the "Bookmark This Link":
Click View in menu and select "Always Show Bookmarks Bar"
Drag the link below to your bookmarks bar.
Click View in menu and select "Always Show Favorites Bar"
Drag the link below to your favorites bar.
Click Bookmarks in menu and select "Show Bookmarks"
Drag the link below to your bookmarks toolbar.
Lean Library Access browser extension allows you to easily access Penn Libraries' licensed content from your laptop or desktop computer when off-campus. Once installed, when you land on content licensed by Penn Libraries, the extension icon will turn from grey 
to green 
letting you know that, as a member of the Penn community, you have access to that content.
Clicking on thegreen Library Access icon will display a pop-up window that provides information on how to access content.
NOTE: For databases that require individual logins (e.g. Lexis, Washington Post) Lean Library may interfere with access. The solution: go to the Lean Library Settings and UNCHECK the option "Automate my authentication and skip associated pop-ups."
For more instructions, visit the Penn Libraries Guide on Lean Library
Turn on Library Links in Google Scholar in order to connect to the Penn Libraries licensed databases for fulltext access.
Now, when you search Google Scholar, you will see "Fulltext via Penntext" links next to records in the list of search results. Click these links to connect to library databases that provide access to the article.
Add the proxy information to any subscription resource URL that uses IP authentication. Paste the information in front of the publisher's URL. You'll then be prompted to enter your PennKey and password.
https://pennlaw.idm.oclc.org/login?url=
https://pennlaw.idm.oclc.org/login?url=https://www.law360.com
https://proxy.library.upenn.edu/login?url=
https://proxy.library.upenn.edu/login?url=http://heinonline.org/HOL/Welcome