German-English translations for haupteingang

main entranceSo many back doors have since been created that it is difficult to locate the main entrance. Mittlerweile hat man sich so viele Hintertürchen offen gehalten, dass der Haupteingang schwer ausfindig zu machen ist.
portal
us
The local library, a portal of knowledgeThe new medical portal has dozens of topical categories containing links to hundreds of sites.the portal vein