TypoScript for cross-site menu links in multidomain / multisite setup

config.multidomain.txt

# Allow cross-site menu links in multidomain / multisite setup
# With properly rendered RealURL links (incl. full external domain path).

# Add the following code to an existing typoscript base in TYPO3.
# This code alone is not sufficient to make a working website :)
# [email protected] - 04/2014 - Free use, no credit required

# Requires standard config of RealURL.

# Add the following to TS Setup:
config {
	typolinkCheckRootline = 1
	typolinkEnableLinksAcrossDomains = 1
}