java等应用无法在6666端口启动，是因为…

非安全端口列表

port process
1 tcpmux
7 echo
9 discard
11 systat
13 daytime
15 netstat
17 qotd
19 chargen
20 ftp data
21 ftp access
22 ssh
23 telnet
25 smtp
37 time
42 name
43 nicname
53 domain
77 priv-rjs
79 finger
87 ttylink
95 supdup
101 hostriame
102 iso-tsap
103 gppitnp
104 acr-nema
109 pop2
110 pop3
111 sunrpc
113 auth
115 sftp
117 uucp-path
119 nntp
123 NTP
135 loc-srv /epmap
139 netbios
143 imap2
179 BGP
389 ldap
465 smtp+ssl
512 print / exec
513 login
514 shell
515 printer
526 tempo
530 courier
531 chat
532 netnews
540 uucp
556 remotefs
563 nntp+ssl
587 stmp?
601 ??
636 ldap+ssl
993 ldap+ssl
995 pop3+ssl
2049 nfs
3659 apple-sasl / PasswordServer
4045 lockd
6000 X11
6665 Alternate IRC [Apple addition]
6666 Alternate IRC [Apple addition]
6667 Standard IRC [Apple addition]
6668 Alternate IRC [Apple addition]
6669 Alternate IRC [Apple addition]