diff --git a/.gitignore b/.gitignore
index 132ef02f0..6429cb325 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,5 @@
 .htaccess
 data
-config.php
 test
 sirgle
 sr_*
diff --git a/adm/config_form.php b/adm/config_form.php
index 96e64cbb2..fbefc03d8 100644
--- a/adm/config_form.php
+++ b/adm/config_form.php
@@ -46,6 +46,13 @@ if(!isset($config['cf_mobile_pages'])) {
     sql_query(" UPDATE `{$g4['config_table']}` SET cf_mobile_pages = '5' ", TRUE);
 }
 
+if(!isset($config['cf_facebook_use'])) {
+    sql_query(" ALTER TABLE `{$g4['config_table']}`
+                    ADD `cf_facebook_use` TINYINT NOT NULL DEFAULT '0' AFTER `cf_kcpcert_use`
+                    ADD `cf_facebook_appid` VARCHAR(255) NOT NULL AFTER `cf_facebook_use`,  
+                    ADD `cf_facebook_secret` VARCHAR(255) NOT NULL AFTER `cf_facebook_secret` ", true);
+}
+
 // uniqid 테이블이 없을 경우 생성
 if(!sql_query(" select uq_id from {$g4['uniqid_table']} limit 1 ", false)) {
     sql_query(" CREATE TABLE IF NOT EXISTS `{$g4['uniqid_table']}` (
@@ -66,6 +73,7 @@ $pg_anchor = '<ul class="anchor">
     <li><a href="#anc_cf_article_mail">글작성메일</a></li>
     <li><a href="#anc_cf_join_mail">가입메일</a></li>
     <li><a href="#anc_cf_vote_mail">투표메일</a></li>
+    <li><a href="#anc_cf_sns">SNS</a></li>
     <li><a href="#anc_cf_extra">여분필드</a></li>
 </ul>';
 ?>
@@ -699,6 +707,38 @@ $pg_anchor = '<ul class="anchor">
     </table>
 </section>
 
+
+<section id="anc_cf_sns" class="cbox">
+    <h2>소셜네트워크서비스(SNS : Social Network Service)</h2>
+    <?php echo $pg_anchor ?>
+
+    <table class="frm_tbl">
+    <colgroup>
+        <col class="grid_3">
+        <col class="grid_6">
+        <col class="grid_3">
+        <col class="grid_6">
+    </colgroup>
+    <tbody>
+    <tr>
+        <th scope="row"><label for="cf_facebook_use">페이스북 사용</label></th>
+        <td><input type="checkbox" name="cf_facebook_use" value="1" id="cf_facebook_use" <?php echo $config['cf_facebook_use']?'checked':''; ?>> 사용</td>
+    </tr>
+    <tr>
+        <th scope="row"><label for="cf_facebook_appid">페이스북 앱 ID</label></th>
+        <td>
+            <input type="text" name="cf_facebook_appid" value="<?php echo $config['cf_facebook_appid'] ?>" id="cf_facebook_appid" class="frm_input"> <a href="https://developers.facebook.com/apps" target="_blank" class="btn_frmline">앱 등록페이지</a>
+        </td>
+        <th scope="row"><label for="cf_facebook_secret">페이스북 앱 Secret</label></th>
+        <td>
+            <input type="text" name="cf_facebook_secret" value="<?php echo $config['cf_facebook_secret'] ?>" id="cf_facebook_secret" class="frm_input" size="30">
+        </td>
+    </tr>
+    </tbody>
+    </table>
+</section>
+
+
 <section id="anc_cf_extra" class="cbox">
     <h2>여분필드 기본 설정</h2>
     <?php echo $pg_anchor ?>
diff --git a/adm/config_form_update.php b/adm/config_form_update.php
index fa050ba99..fd8a3f840 100644
--- a/adm/config_form_update.php
+++ b/adm/config_form_update.php
@@ -100,13 +100,16 @@ $sql = " update {$g4['config_table']}
                  cf_privacy = '{$_POST['cf_privacy']}',
                  cf_open_modify = '{$_POST['cf_open_modify']}',
                  cf_memo_send_point = '{$_POST['cf_memo_send_point']}',
-                 cf_kcpcert_use = '{$_POST['cf_kcpcert_use']}',
-                 cf_kcpcert_site_cd = '{$_POST['cf_kcpcert_site_cd']}',
                  cf_mobile_new_skin = '{$_POST['cf_mobile_new_skin']}',
                  cf_mobile_search_skin = '{$_POST['cf_mobile_search_skin']}',
                  cf_mobile_connect_skin = '{$_POST['cf_mobile_connect_skin']}',
                  cf_mobile_member_skin = '{$_POST['cf_mobile_member_skin']}',
                  cf_gcaptcha_mp3 = '{$_POST['cf_gcaptcha_mp3']}',
+                 cf_kcpcert_site_cd = '{$_POST['cf_kcpcert_site_cd']}',
+                 cf_kcpcert_use = '{$_POST['cf_kcpcert_use']}',
+                 cf_facebook_use = '{$_POST['cf_facebook_use']}',
+                 cf_facebook_appid = '{$_POST['cf_facebook_appid']}',
+                 cf_facebook_secret = '{$_POST['cf_facebook_secret']}',
                  cf_1_subj = '{$_POST['cf_1_subj']}',
                  cf_2_subj = '{$_POST['cf_2_subj']}',
                  cf_3_subj = '{$_POST['cf_3_subj']}',
diff --git a/bbs/register_form_update.php b/bbs/register_form_update.php
index 7cc1039f4..55fc56700 100644
--- a/bbs/register_form_update.php
+++ b/bbs/register_form_update.php
@@ -75,7 +75,10 @@ if ($w == '' || $w == 'u') {
     if ($w=='') {
         if ($msg = exist_mb_id($mb_id))     alert($msg);
 
-        if (!exist_mb_id($mb_recommend))    alert("추천인이 존재하지 않습니다.");
+        if ($config['cf_use_recommend']) {
+            if (!exist_mb_id($mb_recommend))    
+                alert("추천인이 존재하지 않습니다.");
+        }
 
         if (strtolower($mb_id) == strtolower($mb_recommend)) {
             alert('본인을 추천할 수 없습니다.');
diff --git a/config.php b/config.php
index 6dd74d841..92127c493 100644
--- a/config.php
+++ b/config.php
@@ -144,4 +144,4 @@ define('G4_FACEBOOK_CALLBACK',  G4_SNS_URL.'/facebook/callback.php');
 // 게시판에서 링크의 기본갯수를 말합니다.
 // 필드를 추가하면 이 숫자를 필드수에 맞게 늘려주십시오.
 define('G4_LINK_COUNT', 2);
-?>
\ No newline at end of file
+?>`
\ No newline at end of file
diff --git a/plugin/kcp/kcpcert.head.skin.php b/plugin/kcp/kcpcert.head.skin.php
index 0d34c64f0..d141b22b7 100644
--- a/plugin/kcp/kcpcert.head.skin.php
+++ b/plugin/kcp/kcpcert.head.skin.php
@@ -5,7 +5,7 @@ if (!defined('_GNUBOARD_')) exit; // 개별 페이지 접근 불가
 if ($msg = valid_mb_hp($mb_hp))   alert($msg, "", true, true);
 if ($msg = exist_mb_hp($mb_hp, $mb_id))   alert($msg, "", true, true);
 
-$reg_hp = preg_replace("/[^0-9]/", "", trim($_POST['mb_hp']));
+$reg_mb_hp = preg_replace("/[^0-9]/", "", trim($_POST['mb_hp']));
 
 /* ======================================================================================================= */
 /* = 휴대폰인증 및 성인인증                                                                              = */
@@ -17,7 +17,7 @@ if($w == '') {
         alert('휴대폰인증이 되지 않았습니다. 휴대폰인증을 해주세요.', '', true, true);
 
     // 본인인증 hash 체크
-    $reg_hash = md5($reg_hp.$mb_name.$kcpcert_no);
+    $reg_hash = md5($reg_mb_hp.$mb_name.$kcpcert_no);
     if(get_session('ss_kcpcert_hash') != $reg_hash)
         alert('이름 또는 휴대폰번호가 올바르지 않습니다. 정상적인 방법으로 이용해 주세요.', '', true, true);
 
@@ -25,14 +25,14 @@ if($w == '') {
     // 휴대폰번호 변경체크
     $old_hp = preg_replace("/[^0-9]/", "", trim($_POST['old_mb_hp']));
 
-    if($old_hp !== $reg_hp) {
+    if($old_hp !== $reg_mb_hp) {
         // 본인인증체크
         $kcpcert_no = get_session('ss_kcpcert_no');
         if(!$kcpcert_no)
             alert('휴대폰번호가 변경됐습니다. 휴대폰인증을 해주세요.', '', true, true);
 
         // 본인인증 hash 체크
-        $reg_hash = md5($reg_hp.$mb_name.$kcpcert_no);
+        $reg_hash = md5($reg_mb_hp.$mb_name.$kcpcert_no);
         if(get_session('ss_kcpcert_hash') != $reg_hash)
             alert('이름 또는 휴대폰인증 정보가 올바르지 않습니다. 정상적인 방법으로 이용해 주세요.', '', true, true);
     }
diff --git a/plugin/sns/facebook/_common.php b/plugin/sns/facebook/_common.php
index 9b005a1be..c7b38deb9 100644
--- a/plugin/sns/facebook/_common.php
+++ b/plugin/sns/facebook/_common.php
@@ -1,4 +1,4 @@
 <?php
-$g4_path = "../.."; // common.php 의 상대 경로
+$g4_path = "../../.."; // common.php 의 상대 경로
 include_once($g4_path."/common.php");
 ?>
\ No newline at end of file
diff --git a/plugin/sns/facebook/callback.php b/plugin/sns/facebook/callback.php
index c368b647e..93e576e68 100644
--- a/plugin/sns/facebook/callback.php
+++ b/plugin/sns/facebook/callback.php
@@ -1,41 +1,5 @@
 <?php
 include_once("./_common.php");
 
-require_once(G4_SNS_PATH."/facebook/src/facebook.php");
-
-//https://www.facebook.com/dialog/oauth?client_id=440461349373258&redirect_uri=http%3A%2F%2Fchin.so%2Fbbs%2Fajax.sns.php%3Fsns_name%3Dfacebook%26_%3D1364434991642&state=951675978f0f4a6f5a2dfc01fb45e653
-
-//http://chin.so/plugin/facebook/callback.php?code=AQDKN0YBYm9NB_Ca_XtFZckplQk74Oubsd8OVuFDMHGiXDdiZ9cxr-Sw2cs37XvKQ4h0ryhC21nAbB2I0KhqtWaFyPGpDEnQuMMxZRdwKZvvwRRQrGzl7ttI9oQAQ5Y0_WuROIl-4lKTifbZseSP5tJt_YTX8CXfc7h5w6C73N7tPS66UvtsmbJTYT02uXjTiCKPGnqeTgZjZ7XjzRYEn_l_&state=951675978f0f4a6f5a2dfc01fb45e653#_=_
-
-$config = array(
-    'appId' => FACEBOOK_APPID,
-    'secret' => FACEBOOK_SECRET,
-);
-
-$facebook = new Facebook($config);
-
-if ($_GET['logout'] == 'yes') {
-    unset($_SESSION['fb_'.FACEBOOK_APPID.'_code']);
-    unset($_SESSION['fb_'.FACEBOOK_APPID.'_user_id']);
-    unset($_SESSION['fb_'.FACEBOOK_APPID.'_access_token']);
-    header("Location: ".$_SERVER['PHP_SELF']."");
-}
-
-$user = $facebook->getUser();
-
-if ($user) {
-    try {
-        $user_profile = $facebook->api('/me');
-    } catch (FacebookApiException $e) {
-        error_log($e);
-        $user = NULL;
-    }
-}
-
-if ($user_profile) {
-    sql_query(" update {$g4['member_table']} set mb_sns_facebook = '{$_REQUEST['code']}' where mb_id = '{$member['mb_id']}' ");
-    alert_close("페이스북 승인이 성공 했습니다.\\n\\n댓글의 체크를 해제하지 않으시면 모든 댓글 등록시 페이스북에도 자동 등록됩니다.");
-} else {
-    sql_query(" update {$g4['member_table']} set mb_sns_facebook = '' where mb_id = '{$member['mb_id']}' ");
-    alert_close("페이스북을 로그아웃 했습니다.");
-}
+die('콜백');
+?>
\ No newline at end of file
diff --git a/plugin/sns/icon/facebook_off.png b/plugin/sns/icon/facebook_off.png
new file mode 100644
index 000000000..b26d4091e
Binary files /dev/null and b/plugin/sns/icon/facebook_off.png differ
diff --git a/plugin/sns/icon/facebook.png b/plugin/sns/icon/facebook_on.png
similarity index 100%
rename from plugin/sns/icon/facebook.png
rename to plugin/sns/icon/facebook_on.png
diff --git a/plugin/sns/icon/gplus.png b/plugin/sns/icon/gplus.png
deleted file mode 100644
index 717d6f373..000000000
Binary files a/plugin/sns/icon/gplus.png and /dev/null differ
diff --git a/plugin/sns/icon/me2day.png b/plugin/sns/icon/me2day.png
deleted file mode 100644
index caad2cfdb..000000000
Binary files a/plugin/sns/icon/me2day.png and /dev/null differ
diff --git a/plugin/sns/icon/twitter_off.png b/plugin/sns/icon/twitter_off.png
new file mode 100644
index 000000000..08cccb242
Binary files /dev/null and b/plugin/sns/icon/twitter_off.png differ
diff --git a/plugin/sns/icon/twitter.png b/plugin/sns/icon/twitter_on.png
similarity index 100%
rename from plugin/sns/icon/twitter.png
rename to plugin/sns/icon/twitter_on.png
diff --git a/plugin/sns/icon/yozm.png b/plugin/sns/icon/yozm.png
deleted file mode 100644
index 6e3d14b8c..000000000
Binary files a/plugin/sns/icon/yozm.png and /dev/null differ
diff --git a/skin/board/basic/view_comment.skin.php b/skin/board/basic/view_comment.skin.php
index d50db1d12..b6b5097ea 100644
--- a/skin/board/basic/view_comment.skin.php
+++ b/skin/board/basic/view_comment.skin.php
@@ -76,7 +76,7 @@ var char_max = parseInt(<?php echo $comment_max ?>); // 최대
 <?php if ($is_comment_write) {
         if($w == '')
             $w = 'c';
-     ?>
+    ?>
     <aside id="bo_vc_w">
         <h2>댓글쓰기</h2>
         <form name="fviewcomment" action="./write_comment_update.php" onsubmit="return fviewcomment_submit(this);" method="post" autocomplete="off">
@@ -113,6 +113,47 @@ var char_max = parseInt(<?php echo $comment_max ?>); // 최대
             <td><?php echo $captcha_html; ?></td>
         </tr>
         <?php } ?>
+        <tr>
+            <th scope="row">SNS 등록</th>
+            <td>
+                <div id="sns_facebook">
+                <?php
+include(G4_SNS_PATH.'/facebook/src/facebook.php');
+
+$facebook = new Facebook(array('appId'=>G4_FACEBOOK_APPID,'secret'=>G4_FACEBOOK_SECRET));
+// Get User ID
+$user = $facebook->getUser();
+
+if ($user) {
+  try {
+    // Proceed knowing you have a logged in user who's authenticated.
+    $user_profile = $facebook->api('/me');
+  } catch (FacebookApiException $e) {
+    error_log($e);
+    $user = null;
+  }
+}
+
+// Login or logout url will be needed depending on current user state.
+if ($user) {
+    //echo $logoutUrl = $facebook->getLogoutUrl();
+    $loginUrl = $facebook->getLogoutUrl();
+} else {
+    //$loginUrl = $facebook->getLoginUrl(array('redirect_uri'=>urlencode(G4_SNS_URL.'/facebook/callback.php')));
+    $loginUrl = $facebook->getLoginUrl(array('redirect_uri'=>(G4_SNS_URL.'/facebook/callback.php')));
+    //$loginUrl = $facebook->getLoginUrl();
+}
+
+                ?>
+                    <div><a href="<?php echo $loginUrl; ?>" target="_blank"><img src="<?php echo G4_SNS_URL; ?>/icon/facebook_off.png" id="icon_facebook"></a></div>
+                    <div><input type="checkbox" name="chk_facebook" value="1"></div>
+                </div>
+                <div id="sns_twitter">
+                    <div><img src="<?php echo G4_SNS_URL; ?>/icon/twitter_off.png" id="icon_twitter"></div>
+                    <div><input type="checkbox" name="chk_twitter" value="1"></div>
+                </div>
+            </td>
+        </tr>
         <tr>
             <th scope="row">내용</th>
             <td>
diff --git a/skin/member/basic/register_form.skin.php b/skin/member/basic/register_form.skin.php
index 97f47a0e3..d38367053 100644
--- a/skin/member/basic/register_form.skin.php
+++ b/skin/member/basic/register_form.skin.php
@@ -214,7 +214,7 @@ if (!defined('_GNUBOARD_')) exit; // 개별 페이지 접근 불가
 <?php if ($w == "" && $config['cf_use_recommend']) {  ?>
 <tr>
     <th scope="row"><label for="reg_mb_recommend">추천인아이디</label></th>
-    <td><input type="text" name="mb_recommend" id="reg_mb_recommend" class="frm_input"></td>
+    <td><input type="text" name="mb_recommend" id="reg_mb_recommend" class="frm_input" required></td>
 </tr>
 <?php }  ?>