Indawo eyodwa kuphela ephuma ezimweni eziphuthumayo isethwe engxenyeni ngayinye yezakhiwo eziphakeme. Njengoba iminyango yomlilo ingavulwa ohlangothini olulodwa kuphela, uma izingxenye ezimbili eziseduze zinokuphuma okukodwa kwezimo eziphuthumayo, iminyango yomlilo emibili kufanele ibekwe ku-firewall futhi ivulelwe izinhlangothi zombili ngokulandelana ukuze kuhlangatshezwane nesidingo sokuphuma phakathi kwalezi zingxenye ezimbili.