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itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">故障代码691</span><meta itemprop="position" content="3"></li></ul></nav><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>故障代码691</h1></header>
<p><em>&quot;访问被拒绝,因为用户名或密码在域上无效。&quot;(Access denied because the username or password is invalid on the domain.)</em></p>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="现象">现象<a href="#现象" class="hash-link" aria-label="Direct link to 现象" title="Direct link to 现象"></a></h2>
<p>PPPoE宽带拨号提示 <code>已拒绝远程连接,因为未识别出你提供的用户名和密码组合,或在远程访问服务器上禁止使用选定的身份验证协议</code> ,甚至提示错误代码<code>691</code></p>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="原因">原因<a href="#原因" class="hash-link" aria-label="Direct link to 原因" title="Direct link to 原因"></a></h2>
<p><strong>归根到底原因: 物理连接没问题,但是运营商拒绝此账号的本次登陆请求</strong></p>
<p>有可能是以下的情况:</p>
<ul>
<li>还有人正在使用这个账号上网</li>
<li>账号欠费或者停机</li>
<li>插错运营商交换机:如插到了联通交换机上使用移动账号登陆,那肯定拒绝登陆啊</li>
<li>账号或密码错误</li>
<li>账号异常断开:用户在拨号成功后网线突然断开,或在关机/重启/断开网络之前不断开当前宽带连接有可能导致账号&quot;挂死&quot;</li>
<li>短时间内过多的登录被运营商暂时拉黑了有时候会表现为651</li>
<li>MAC地址已被绑定无法接入新设备</li>
</ul>
<blockquote>
<p>对于后三种情况通常可以打客服电话解绑刷新来解决或者稍等5分钟</p>
</blockquote>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="解决方法">解决方法<a href="#解决方法" class="hash-link" aria-label="Direct link to 解决方法" title="Direct link to 解决方法"></a></h2>
<blockquote>
<p>首先,告诉用户一个账号只能一个人使用..别人在用ta就用不了</p>
</blockquote>
<ol>
<li>
<p>确认账号,密码没有输入错误</p>
<ul>
<li>默认账号密码见<a href="/docs/wiki/基础知识/学校内的运营商#%E8%B4%A6%E6%88%B7%E5%92%8C%E5%AF%86%E7%A0%81">这里</a></li>
</ul>
</li>
<li>
<p>确认校园卡没有欠费可以打10010问或者在联通APP上查</p>
</li>
<li>
<p>联系运营商进行解绑刷新,具体操作见<a href="/docs/wiki/技能/杂项/解绑端口,刷新数据">这里</a></p>
</li>
</ol>
<blockquote>
<p>实在不行也可以尝试机房重新换端口跳线,有时可以解决。注意:机房跳线更换端口后,会表现为 691连接被远程计算机中止此时请执行上一个步骤</p>
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