[root@extmail ~]# semanage port -a -t http_cache_port_t -p udp 3401
libsepol.context_from_record: MLS is enabled, but no MLS context found
libsepol.context_from_record: could not create context structure
libsepol.port_from_record: could not create port structure for range 3401:3401 (udp)
libsepol.sepol_port_modify: could not load port range 3401 - 3401 (udp)
libsemanage.dbase_policydb_modify: could not modify record value
libsemanage.semanage_base_merge_components: could not merge local modifications into policy
/usr/sbin/semanage: 无法添加端口 udp/3401