An assembly includes: a coaxial cable; a coaxial connector having an inner contact and an outer conductor body, the outer conductor body having a rear portion electrically connected with the outer conductor of the coaxial cable to form a joint; and a protective boot that overlies a forward portion of the coaxial cable and the rear portion of the outer conductor body to protect the joint between the coaxial cable and the connector. The boot comprises a body with a bore extending therethrough and includes a cable sealing section at one end that interference fits with the jacket of the cable to provide sufficient support for coaxial cable and creates a first seal with the jacket of the cable. The boot further including a feature within the bore that engages the outer conductor body forward of the electrical connection between the outer conductor and the outer conductor body.