How to show an outside website like google or bing within a master page

I have created a website using a master page. One of the links within the master page is for Googles website. I can display the google website within the master page by inserting the website within a Iframe, but the problem is when I do a search in google and I click on the links some of the links within google do not open. After some reading I find that some websites do not allow their sites to open within an iframe “You have to check for HTTP response header X-Frame-Option of those sites. if its value is “DENY or SAMEORIGIN”, then you can not load those website in the iframes.”.

IFrame: This content cannot be displayed in a frame

I have two internal sites. I’m trying to show one’s content in the iframe of the other site. However I’m getting this message: “This content cannot be displayed in a frame.” I’ve read the reason I’m getting this message but, I would like to bypass it since the sites are internal and I’m not concerned with someone trying to hijack my users. I couldn’t find a way to bypass it after searching the internet, but feel like it should be possible because the rest of the message seems to hint at it.

Display PDF in iframe

I have a solution in place for my site that renders a requested PDF document in a full page using the code below. Now my client wants the document rendered within an iframe. I can’t seem to get it to work readily, maybe I am missing something obvious. The first code will properly display the PDF in a new window.