Web sites Chrome,firfox The following ports are inaccessible, so you should avoid the following ports when configuring your own sites:
Tcpmux 7,//Echo 9,//Discard,//systat,//daytime,//netstat,//QOTD,//ch Argen,//FTP data,//FTP access,//SSH,//Telnet,//SMTP PNS,//time,//Name ,//Nicname,//Domain PRIV-RJS,//,//finger,//Ttylink,//Supdup 101,//HO Striame 102,//ISO-TSAP 103,//GPPITNP 104,//Acr-nema 109,//POP2,//POP3 111,//SUNRPC 113, Auth,//SFTP 117,//Uucp-path 119,//NNTP 123,//NTP 135,//Loc-srv/epmap 139,// NetBIOS 143,//IMAP2 179,//BGP 389,//LDAP 465,//Smtp+ssl,/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 4045,//LOCKD 6000,//X11
For some port numbers Firefox and Chrome cannot access
