Chrome error code: err_unsafe_port

Recently, multiple sites were released for testing with nginx, using port 87 and port 88,

Port 88 is normal and port 87 cannot be accessed,

Click More and the error code err_unsafe_port is displayed.

Insecure port? Nima only relies on the port to solve the problem of no installation?

If you do not want to modify the browser settings, use another port. After you search, Firefox has similar port restrictions. If you want to use a similar port,

What we need to do is to allow access to non-conventional port addresses. Solution: Select Google Chrome shortcuts, right-click Properties, and add the following in the "target" text box:

--explicitly-allowed-ports=87,6666,556,6667

Multiple ports are allowed to be separated by commas. The final result is as follows:

C:\Users\Huoqing\AppData\Local\Google\Chrome\Application\chrome.exe  --explicitly-allowed-ports=6666,556

Appendix: Google Chrome default non-secure port list. Although the above method can solve the problem, we recommend that you avoid the following ports as much as possible:

  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]

Chrome error code: err_unsafe_port