Cross domain canonical

1. What is cross domain canonical?
2. Can you canonical to a different domain?
3. What is domain canonicalization?
4. Are canonical URLs bad for SEO?
5. What is meant by cross domain?
6. What is considered cross domain?
7. Can I point multiple domains to same website?
8. Should every URL have a canonical tag?
9. Can a page have multiple canonical tags?
10. What is the difference between canonicalization and normalization?
11. Why is it called canonical?
12. What is cross domain vulnerability?
13. What is cross domain problem?
14. Is CORS a vulnerability?
15. Can you bypass CORS?
16. What causes CORS issue?
17. How does a cross domain solution work?

What is cross domain canonical?

Cross-domain canonicals are often used when a publisher syndicates content from another source - they can set a cross-domain canonical to indicate that the original source URL is the canonical version. If Page A is canonicalized to Page B, it is explicitly marking Page B as it's canonical.

Can you canonical to a different domain?

What's more, you can even use rel=canonical across different domains. In other words, you can have one “canonical URL” (or “preferred” version of a web page) replicated on more than one other domain – allowing you to, for example, distribute certain content across several sites.

What is domain canonicalization?

A canonical URL is the URL of the best representative page from a group of duplicate pages, according to Google. For example, if you have two URLs for the same page (such as example.com? dress=1234 and example.com/dresses/1234 ), Google chooses one as canonical.

Are canonical URLs bad for SEO?

Canonical issues caused by duplicate content are a really common SEO problem for websites. Having identical or very similar content on more than one URL can result in indexing problems. Worse, it can dilute your link equity, which could harm your search rankings.

What is meant by cross domain?

Definition(s):

The act of manually and/or automatically accessing and/or transferring information between different security domains.

What is considered cross domain?

The "origin" in the term "cross-origin" is defined as the scheme, host, and port of a url. For example, in the url https://mydomain.com:3000/foo/bar, the scheme is "https", the host is "mydomain.com" and the port is "3000".

Can I point multiple domains to same website?

With most registrars, it's easy to forward multiple domains to your website so you can simply create one site and then redirect visitors who type one of your other domain names to that one website.

Should every URL have a canonical tag?

All pages (including the canonical page) should contain a canonical tag to prevent any possible duplication. Even if there are no other versions of a page, then that page should still include a canonical tag that links to itself.

Can a page have multiple canonical tags?

Rule #5: Use one canonical tag per page

If the page has multiple canonical tags, then Google will ignore both. In cases of multiple declarations of rel=canonical, Google will likely ignore all the rel=canonical hints.

What is the difference between canonicalization and normalization?

In most fields, a canonical form specifies a unique representation for every object, while a normal form simply specifies its form, without the requirement of uniqueness.

Why is it called canonical?

The word canonical is from the root canon, with both evolving from the Latin cononicus, or "according to rule," a meaning applied to religion during the Middle Ages.

What is cross domain vulnerability?

Vulnerabilities in Flash Cross-Domain Policy File is a Low risk vulnerability that is one of the most frequently found on networks around the world. This issue has been around since at least 1990 but has proven either difficult to detect, difficult to resolve or prone to being overlooked entirely.

What is cross domain problem?

This is a security restriction that prevents requests being made from one origin to another. For example, it will prevent an https:// page hitting an http:// address because the protocol is different. It will stop example.com calling another.com because it is a different domain.

Is CORS a vulnerability?

Vulnerabilities arising from CORS configuration issues. Many modern websites use CORS to allow access from subdomains and trusted third parties. Their implementation of CORS may contain mistakes or be overly lenient to ensure that everything works, and this can result in exploitable vulnerabilities.

Can you bypass CORS?

CORS is essentially controlled by the Access-Control-Allow-Origin (ACAO) header on server, and nothing you do on the client can bypass this restriction.

What causes CORS issue?

A CORS error occurs when the server doesn't return the CORS headers required. For example, https://domain-a.com tries to make an API request to https://domain-b.com that doesn't allow it to access its resources.

How does a cross domain solution work?

In order to assure true domain separation, cross domain solutions incorporate a hardware-enforced network segmentation and protocol break via data diodes. Data flows are transmitted between domains on one-way transfers, with a protocol termination on the send side, and a protocol resume on the receive side.