Samle for setting login IP ranges to profile.

set-login-ip-ranges.js

var jsforce = require('jsforce');
var conn = new jsforce.Connection({});
conn.login('{username}', '{password}', function(err, userInfo) {
  conn.metadata.update('Profile', {
    fullName:'カスタムテストユーザ',
    loginIpRanges: [
    {
      startAddress:'0.0.0.0',
      endAddress:'0.255.255.255'
    },
    {
      startAddress:'1.0.0.0',
      endAddress:'1.255.255.255'
    }]
  });
});