登录保护是一个非常重要的环节，下面通过图文并茂的方式给大家详细讲解下：

前两天@cyy 给我发了一个图

然后我就想到USHQ的ssh登录app通知功能，然后就像如果把这个部署到自用的服务器就好了。至少多一层安全系数。

首先要感谢@Legion 帮忙搞定了几个错误以及搞定了Geo2IP的JSON转换。 (P.S.此人为自动化运维大神级人物，现任职于德国一数据统计企业。)

当然，我和他相比我就是战五渣了...大家一定要多向 @Legion 学习啊~~

说下需要做的准备：

sendmail或者Postfix

php

bash

CentOS/Debian/Ubuntu

若你的生产环境中没有php sendmail Postfix等组件，请移步:

@Legion: Linux之使用shell脚本实现ssh登录报警

参考文件

首先是报警脚本文件

Shell

#!/bin/sh ######################################################################### # File Name: Login-alert.sh # Author: Jason # Email: master#deamwork.com # Created Time: Tue Jul 21 2015 21:23:16 PM CST ######################################################################### #require jq #wget http://stedolan.github.io/jq/download/linux64/jq -O /usr/local/bin/jq #chmod +x /usr/local/bin/jq #if error, please # following one #PATH=/usr/local/nginx/sbin:/usr/local/php/bin:/usr/local/mysql/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin #Geo2IP by Legion(http://www.dwhd.org/) eval `curl -s "http://ip.taobao.com/service/getIpInfo.php?ip=${SSH_CLIENT%% *}" | jq . | awk -F':|[ ]+|"' '{if($3~/^(country|area|region|city|isp)$/){print $3"="$7}}'` #html mail content cat >> mail-no-base64.html <<EOF #请自行准备邮件模板，以下为可能用到的变量 #输出主机名 `hostname` #输出登录端口 ${SSH_CLIENT##* } #输出登录来源IP ${SSH_CLIENT%% *} #输出IP地址归属地 {country}_${area}_${region}_${city}_${isp} #输出登录时间 `date` EOF #Base64 Encoding base64 mail-no-base64.html > mail-base64.html #使用Sendmail #sendmail -t >/dev/null 2>&1 <<EOF #to:example@example.com #from:Example<example@example.com> #subject:[`hostname`]服务器登录告警 #`cat mail-no-base64.html` #EOF #使用postfix #cat >> mail.php <<EOF #<"example@example.com"; #$subject = "[`hostname`]服务器登录告警"; #$message = "`cat mail-base64.html`"; #$headers = "MIME-Version: 1.0" . "rn"; #$headers .= "Content-Type: text/html; charset="utf-8"" . "rn"; #$headers .= "Content-Transfer-Encoding: base64" . "rn"; #$headers .= 'From: Example<example@example.com>' . "rn"; #$send = mail($to,$subject,$message,$headers); #if($send){echo 'Mail Send Successful.';}else{echo 'Failed.';} #?> #EOF #使用 SMTP (require smtp-class.php) cat >> mail.php <<EOF <"smtp-class.php"); $smtpserver = "smtp.example.com"; $smtpserverport = 25; $smtpusermail = "example@example.com"; $smtpemailto = "example@example.com"; $smtpuser = "example"; $smtppass = "password"; $mailsubject = "[`hostname`]服务器登录告警"; $mailbody = "`cat mail-base64.html`"; $mailtype = "HTML"; $smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass); $smtp->debug = TRUE; $smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype); ?> EOF php mail.php yes y | rm mail-no-base64.html mail-base64.html mail.php

然后是如何触发这个脚本：

Shell

复制代码 代码如下:

echo "screen -fa -d -m -S WL /etc/Login-alert.sh" >> /etc/profile

用这种方法， 新开终端或者复制终端都会触发报警

如果使用smtp方式，请保存以下文件为smtp-class.php

PHP

<?php class smtp { /* Public Variables */ var $smtp_port; var $time_out; var $host_name; var $log_file; var $relay_host; var $debug; var $auth; var $user; var $pass; /* Private Variables */ var $sock; /* Constractor */ function smtp($relay_host = "", $smtp_port = 25,$auth = false,$user,$pass) { $this->debug = FALSE; $this->smtp_port = $smtp_port; $this->relay_host = $relay_host; $this->time_out = 30; //is used in fsockopen() $this->auth = $auth;//auth $this->user = $user; $this->pass = $pass; $this->host_name = "localhost"; //is used in HELO command $this->log_file = ""; $this->sock = FALSE; } /* Main Function */ function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "") { $mail_from = $this->get_address($this->strip_comment($from)); $body = ereg_replace("(^|(rn))(.)", "1.3", $body); $header .= "MIME-Version:1.0rn"; if($mailtype=="HTML") { $header .= "Content-Type: text/html; charset="utf-8"" . "rn"; $header .= "Content-Transfer-Encoding: base64" . "rn"; } $header .= "To: ".$to."rn"; if ($cc != "") { $header .= "Cc: ".$cc."rn"; } $header .= "From: $from<".$from.">rn"; $header .= "Subject: ".$subject."rn"; $header .= $additional_headers; $header .= "Date: ".date("r")."rn"; $header .= "X-Mailer:By TianhaiTech (PHP/".phpversion().")rn"; list($msec, $sec) = explode(" ", microtime()); $header .= "Message-ID: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">rn"; $TO = explode(",", $this->strip_comment($to)); if ($cc != "") { $TO = array_merge($TO, explode(",", $this->strip_comment($cc))); } if ($bcc != "") { $TO = array_merge($TO, explode(",", $this->strip_comment($bcc))); } $sent = TRUE; foreach ($TO as $rcpt_to) { $rcpt_to = $this->get_address($rcpt_to); if (!$this->smtp_sockopen($rcpt_to)) { $this->log_write("Error: Cannot send email to ".$rcpt_to."n"); $sent = FALSE; continue; } if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) { $this->log_write("E-mail has been sent to <".$rcpt_to.">n"); } else { $this->log_write("Error: Cannot send email to <".$rcpt_to.">n"); $sent = FALSE; } fclose($this->sock); $this->log_write("Disconnected from remote hostn"); } return $sent; } /* Private Functions */ function smtp_send($helo, $from, $to, $header, $body = "") { if (!$this->smtp_putcmd("HELO", $helo)) { return $this->smtp_error("sending HELO command"); } #auth if($this->auth) { if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) { return $this->smtp_error("sending HELO command"); } if (!$this->smtp_putcmd("", base64_encode($this->pass))) { return $this->smtp_error("sending HELO command"); } } if (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">")) { return $this->smtp_error("sending MAIL FROM command"); } if (!$this->smtp_putcmd("RCPT", "TO:<".$to.">")) { return $this->smtp_error("sending RCPT TO command"); } if (!$this->smtp_putcmd("DATA")) { return $this->smtp_error("sending DATA command"); } if (!$this->smtp_message($header, $body)) { return $this->smtp_error("sending message"); } if (!$this->smtp_eom()) { return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]"); } if (!$this->smtp_putcmd("QUIT")) { return $this->smtp_error("sending QUIT command"); } return TRUE; } function smtp_sockopen($address) { if ($this->relay_host == "") { return $this->smtp_sockopen_mx($address); } else { return $this->smtp_sockopen_relay(); } } function smtp_sockopen_relay() { $this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."n"); $this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out); if (!($this->sock && $this->smtp_ok())) { $this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."n"); $this->log_write("Error: ".$errstr." (".$errno.")n"); return FALSE; } $this->log_write("Connected to relay host ".$this->relay_host."n"); return TRUE;; } function smtp_sockopen_mx($address) { $domain = ereg_replace("^.+@([^@]+)$", "1", $address); if (!@getmxrr($domain, $MXHOSTS)) { $this->log_write("Error: Cannot resolve MX "".$domain.""n"); return FALSE; } foreach ($MXHOSTS as $host) { $this->log_write("Trying to ".$host.":".$this->smtp_port."n"); $this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out); if (!($this->sock && $this->smtp_ok())) { $this->log_write("Warning: Cannot connect to mx host ".$host."n"); $this->log_write("Error: ".$errstr." (".$errno.")n"); continue; } $this->log_write("Connected to mx host ".$host."n"); return TRUE; } $this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")n"); return FALSE; } function smtp_message($header, $body) { fputs($this->sock, $header."rn".$body); $this->smtp_debug("> ".str_replace("rn", "n"."> ", $header."n> ".$body."n> ")); return TRUE; } function smtp_eom() { fputs($this->sock, "rn.rn"); $this->smtp_debug(". [EOM]n"); return $this->smtp_ok(); } function smtp_ok() { $response = str_replace("rn", "", fgets($this->sock, 512)); $this->smtp_debug($response."n"); if (!ereg("^[23]", $response)) { fputs($this->sock, "QUITrn"); fgets($this->sock, 512); $this->log_write("Error: Remote host returned "".$response.""n"); return FALSE; } return TRUE; } function smtp_putcmd($cmd, $arg = "") { if ($arg != "") { if($cmd=="") { $cmd = $arg; } else { $cmd = $cmd." ".$arg; } } fputs($this->sock, $cmd."rn"); $this->smtp_debug("> ".$cmd."n"); return $this->smtp_ok(); } function smtp_error($string) { $this->log_write("Error: Error occurred while ".$string.".n"); return FALSE; } function log_write($message) { $this->smtp_debug($message); if ($this->log_file == "") { return TRUE; } $message = date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message; if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a"))) { $this->smtp_debug("Warning: Cannot open log file "".$this->log_file.""n"); return FALSE;; } flock($fp, LOCK_EX); fputs($fp, $message); fclose($fp); return TRUE; } function strip_comment($address) { $comment = "([^()]*)"; while (ereg($comment, $address)) { $address = ereg_replace($comment, "", $address); } return $address; } function get_address($address) { $address = ereg_replace("([ trn])+", "", $address); $address = ereg_replace("^.*<(.+)>.*$", "1", $address); return $address; } function smtp_debug($message) { if ($this->debug) { echo $message; } } }

?>

实现效果：

有需要的朋友可以参考下，希望大家能够喜欢。