const regex = /(?<comment>(?:\w+\s)+(?:(?<ip>\d{1,255}.\d{1,255}.\d{1,255}.\d{1,255}))\s(?:\w+\s)\d{1,65535}.*)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?<comment>(?:\\w+\\s)+(?:(?<ip>\\d{1,255}.\\d{1,255}.\\d{1,255}.\\d{1,255}))\\s(?:\\w+\\s)\\d{1,65535}.*)', 'gm')
const str = `Mar 6 17:15:20 Zant sshd[29880] <Error>: error: maximum authentication attempts exceeded for invalid user admin from 190.232.81.120 port 41095 ssh2 [preauth]`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions