centos7 服务器基本的安全设置步骤

centos7 服务器基本的安全设置步骤,第1张

作文我的大学生活-河大

如诗的青春——我的大学

“有些诗写给昨日和明日,有些诗写给爱恋,有些诗写给从来未曾谋面,但是在日落之前也从未放弃过的理想”,而我,则想写给我如诗的青春——我的大学。

常听人赞颂大学,说是怎样的无拘无束、海阔天空,但是,对我而言,似乎不是,因为经历了近一年的大学生活,发现我的大学生活从来没能符合这种理想。

在大学的校园里,上课的教室是不固定的,所以,每天我都必须为了上不同的课程而多次转移阵地,如此“曲折”的上课经历除了让我感到惊奇之外,更多的是难以置信。而除了上课时间,其他的空余时间都是自己安排,没有了固定的教室,没有老师盯着自习,于是我开始彷徨,因为似乎除了寝室,白天的空余时间没有地方可以去。图书馆总是人满为患,偌大的自修室虽然还有一些凳子是空的,可桌上却叠著高高的书本,尽管我有想要坐下的贼心,却没那个贼胆,因为等那些书的主人来了,我就得被恶狠狠地赶走了;当然,除了图书馆,还有六教可以自修,可悲的是,在初来大学的时候,我竟然不知道还有这样一个地方可以自修。

这些对于习惯了高中生活的我来说,都感觉难以适应。也许所谓的无拘无束的大学生活仅仅只是指没有了繁重的作业,没有了从早到晚的满满的课,没有了老师逼迫的自习……可是,于此同时,我们的课程也变得更难了,不是么?没有了老师的监督,我们又是否自觉了呢?如果没有将专业学好,我们的理想又要怎么办呢?其实,因为这样的自由,大学对我们的自身要求变得更高了,需要我们更努力地去学习、去奋进。

但是,不得不承认的是,大学这一年的生活也让我收获了很多快乐。

第一次走进这个陌生的校园,感觉好大、好美,月牙湖、凉亭、柳树、花朵……俨然错落有致,似乎是来到了一个精心设计的花园,虽没有水榭,亦没有楼阁,但是,一水一树一倩影,足矣。怀着欣喜的心情,我开始尝试着去体验身边的新鲜事物。

大学伊始,社团的招新活动早已开展地如火如荼,面对各种各样的社团,我也充满著热情和期待,填了两个向往已久的社团招新表格,接下来就是一轮接着一轮的面试,幸运的是,我都进了。在社团工作的日子,不能说是很轻松的,因为所选部门的原因,让我一直都很忙碌,学习之余的时间几乎都这样被瓜分了。但是,在社团里,和别人一起工作的日子是快乐满足的,我懂得了什么是团结合作,学会了怎样去和工作伙伴相处,在能力上也得到了锻炼,就这样,我和别人一起认真努力地工作著,有付出,也有收获。这也让我更加坚信一句话:“一朵孤芳自赏的花只是美丽,一片相互依恃著而怒放的锦绣才是灿烂”

大学生活最绚烂的一页,应该是新认识的好朋友了。同学、室友、工作的伙伴……一年的时光不短也不长,足可以让我们互相了解,读懂彼此。曾经一度我以为,大学里没有了同桌的陪伴,没有了从前的知心好友,我的大学生活终将会是孤独的,过去所有的一切都将只会变成美好的回忆,抚之怅然,却又无处可寻。可是,出乎意料之外的是,我又找到了新的好朋友,可以无话不说的好朋友,从前的好朋友们,也一直保持着联络,隔着电话,我们笑着回忆曾经一起时的快乐时光,分享在大学校园里遇见的趣事、乐事、伤心事……这样的生活很幸福,也很享受,我也很感谢上苍让我们这样真诚地拥有彼此,无论是曾经的,还是现在的好朋友。

如果说人生是一本书的话,那么大学无疑是我阅读过的最精彩的一页。尽管我觉得大学的生活并不轻松,反而是另一种辛苦,可是,我依然愿意享受地去品读其中的字字句句,用深情去朗诵这首青春的诗——我的大学。

韩语作文我的大学生活

韩语作文外貌PhysicalAppearance对人物外表描写。同时,肖像的描写并不是一次性

英语作文我的大学生活

When I was young, I’m looking forward to going to the college College is the heaven College can make our life differentFrankly speaking, I have always cherished my college life When I was a freshman, I was an active student that would always take part in all kinds of league activities And I worked hard in my basic courses, so I got high marks in the first semester What an only pity that I spent too much money on the league activities that didn’t always take my interesting As some people have said, there are o things the most important in the college, one is study, and the other is pany Yes, some things I still feel hard to talk about are my pany with other people Maybe it is the appearance reason that although I spared no effort on the pany, I feel passive in getting along with my clas ates I was rather confused by it So I began to take care of the philosophy, especially the Chinese traditional philosophy, such as si shu wu jing I read in the library, I listened to the teacher in elective course, and then I got strength and courage to face my life

Things have been always changing What I have learnt helped me getting well with my friends Things are always easy, but people like to make them plex The God creates people, so people have privacy and dignity of themselves It’s like that the nature creates all kind of flowers and grasses, and some may get beauty, at the same way some may get ugly, but the flowers and grasses themselves didn’t have any fault as the nature has given them the same bodies, what is different is that the different sight under the sunshine Actually, maybe it will be more possible for people to look down upon the ‘ugly’ man in the first sight But take notice of that, it’s only on the face Not everyone will bee a music star, or film star What’s more important to a person is that the spirit he has which can really make a person healthier What is it we have all pursued all the life Very easy a question, our life So people should know what he will be like People live in today, not in the future We should thank to what we have got, but not beg helpless Just like this, I had many things known I didn’t care what people said again, I made effort to keep my character nice I tried to help everybody around me I spoke to people with iling, I tried to find mon with people I feel that I’m the most fortunate man that I have got so much from the God And now, you see, I live very healthy and happy

I don’t tell many stories about my college life as I think the most important thing in your college life is the consideration of your life The most perfect thing I think is the fact that I can change myself

Now everything is getting well,I can look after myself,so please don't worry about me The only problem is that I miss you very muchOh, the Spring Festival is ingI wish you all will have a happy new year!

英语作文我的大学生活150字

College life

As a sophomore, I feel that the time flies

You may consider that college life is boring As we don’t know how to deal with the plenty of spare time But I define the college life will bee wonderful

Frist, I am a girl who like freedom In my college life, I can play puter very late, Whitout worrying my parents asking me to go to bed at the midnight Second, I like rock'n'roll, I can play the music very loudly in my dorm On the contrary , my mother will be angry when I listen to the music in my home And then , You can join a lot of associations and University Student Councils In our college, It is a training for collegers I join in atheneum with a lot of lovely girls, so we chat very happy As we held several parties, I felt very suessful and seeing everyone united, I was very glad and deeply moved Another , I am absorbed grand library, school buildings and wide playground Our campus obtains beautiful environment and good atmosphere to study My school’s library has a lot of different books and magazines Every weekend , a lot of students can go to library to read the books Otherwise ,our school have a lot of foreign teachers, In you free time, you can go to the PETER HOLL and visit the foreign teachers Through conversation with foreign teachers it practise your English In your spare time, you can play basketball, pingpang and so on Doing sports is very interesting and good for your health In fact, you can do anything which you are interested in

In a word,college life is wonderful!

英语作文我的大学生活200字

My college life

It is four years since I came into my college I have to say that my college life was so wonderful, although in some aspects I failed

I love the campus, in which the lanscape was so beautiful and the study atomasphere was so good, we always studyed there along with relaxation I majored in Marketing, it was a good speciality for its feature of operating and exercise I knowed if I wanted to do something and bee some one, I have to take my theory knowledge into every practice and summerize in time

So I joined in some parties inner the campus to excercise myself much, in fact we had to do more practice to apply our knowledge to the work which was similar to that in our future

Some people said that four- year study could not bring us much, but could bring us a mind for thinking and operating I agreed it We could not get everything in our college, what possible was that we were albe to learn how to think about an issue, how to find a way for it, the next step needs us to go by ourselves

That’s Ok, even we can only get this, it is enough for us So prcticing more with a good mind will make my future possible

作文我的大学生活与理想。要求150字

大学,是每一个学者的最向往的日子,大学生活是我们认为的美满日子,我们一直期待,大学,可以随心所欲,大学,可以不用每一天满课,大学,可以说走就走的旅程

我的大学生活,英语作文

hen i was in high school, I had to study all the time and hardly had spare time to do what i wanted toBesides, I had to focus on my textbooks and doing exercise again and again Therefore, I had little time to read magazines and novels and watch TV what was worse, I couldn't play with my friends a lot, which I couldn't stand the most In a word, all i did in high shool should be considered for the College Entrance Examination dedecms

However, my college life is totally different from the life in high schoolI can arrange my time freely I spend most of my time reading in the library, where I can open my eyes and broaden my mindIn my free time, I also join some s,where i can make a lot of friends of different majors My teachers in college are so kind and knowledgeable that they not only teach us knowledge but also how to be a person and how to get on with others In addition, there are more opportunities for me to improve myself

I believe college life is an important stage in my life In college, i can learn how to learn by myself, how to get on with others, how to live independentlyCollege provides me with a stage where i can show myself and be myself

My Campus Life

我的大学生活

My campus life is rich and colorful

我的大学生活是丰富多彩的。

I go to attend class everyday morning excluding

除了周末,我每天早上去上课。

weekend,in class i study and discuss all kinds of

在课堂上我学习各种只是,knowledge with my teacher and my clas ates

并和我的老师和同学讨论问题。

After the class, ofen i go to play basketball

下课以后,通常我和我的朋友去打篮球或者羽毛球。

or badminton with my friends

In the evening,i have o hours for study by

晚上,我先去上两个消失的自习,

oneself in scheduled time, and then go back to my

然后回到侵蚀上网。

dormitory and surf on the inter

At the weekend,i take part in some part-time jobs

周末,我经常参加一些 工作,

and go to the Einglish Corner sometimes

有时候去参加英语角。

All in all,my campus life is beatiful and substantial

方法如下:

检查服务是否启动

1、在SQLServer服务器中, 打开SQLServer服务管理器。单击开始-程序-Microsoft SQLServer-服务管理器菜单命令。

2、打开SQLServer服务管理器,单击服务器,选择要检查的SQLServer的实例名abc10-1DA235E90,单击服务,选择SQLServer选项,如果此时暂停或者停止按钮可用,说明服务已经启动;否则则没有启动,启动即可。

3、最好在SQLServer服务管理器中将选择随系统启动而启动服务。选择当启动OS时自动启动服务选择框,完成让MSSQLSERVER服务随操作系统启动而自动启动。

4、再次打开SQL Server 数据库,选择连接数据库服务器实例,可以正常连接打开数据库了。

5、SQL Server数据库能正常连接得保证网络通畅,操作过程中还需要进行网络测试,可以通过PING命令实现。如下图所示,表示网络通畅。

关闭ping扫描,虽然没什么卵用

先切换到root

echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all

1代表关闭

0代表开启

用iptables

iptables -I INPUT -p icmp -j DROP

简单介绍下基本的 dedecms _aq/' target='_blank'>安全设置

一、创建普通用户,禁止root登录,只允许普通用户使用su命令切换到root

这样做的好处是双重密码保护,黑客就算知道了普通用户的密码,如果没有root密码,对服务器上攻击也比较有限

以下是具体做法(需要在root下)

添加普通用户

useradd xxx

设置密码

passwd xxx

这样就创建好了一个普通用户

禁止root登录

vi /etc/ssh/sshd_config

PermitRootLogin no

Systemctl restart sshd

这样就完成了第一步,之后root就无法登录服务器只能通过普通用户su切换

二、修改ssh的默认端口22,因为ssh的端口是22,我们如果修改了该端口,他们就需要花费一点时间来扫描,稍微增加了点难度

以下将端口改为51866可以根据需要自己更改,最好选择10000-65535内的端口

step1 修改/etc/ssh/sshd_config

vi /etc/ssh/sshd_config

#Port 22 //这行去掉#号

Port 51866 //下面添加这一行

为什么不先删除22,以防其他端口没配置成功,而又把22的删除了,无法再次进入服务器

step2 修改SELinux

安装semanage

$ yum provides semanage

$ yum -y install policycoreutils-python

使用以下命令查看当前SElinux 允许的ssh端口:

semanage port -l | grep ssh

添加51866端口到 SELinux

semanage port -a -t ssh_port_t -p tcp 51866

注:操作不成功,可以参考:https://sebastianbladecom/how-to-modify-ssh-port-in-centos7/

失败了话应该是selinux没有打开

然后确认一下是否添加进去

semanage port -l | grep ssh

如果成功会输出

ssh_port_t tcp 51866, 22

step3 重启ssh

systemctl restart sshdservice

查看下ssh是否监听51866端口

netstat -tuln

Step4 防火墙开放51866端口

firewall-cmd --permanent --zone=public --add-port=51866/tcp

firewall-cmd --reload

然后测试试试,能不能通过51866登录,若能登录进来,说明成功,接着删除22端口

vi /etc/ssh/sshd_config

删除22端口 wq

systemctl restart sshdservice

同时防火墙也关闭22端口

firewall-cmd --permanent --zone=public --remove-port=22/tcp

注意如果是使用阿里的服务器需要到阿里里面的安全组添加新的入站规则(应该是因为阿里的服务器是用的内网,需要做端口映射)

三、使用一些类似DenyHosts预防SSH暴力破解的软件(不详细介绍)

其实就是一个python脚本,查看非法的登录,次数超过设置的次数自动将ip加入黑名单。

四、使用云锁(不详细介绍)

参考自http://tim-flyiteyecom/blog/2308234

总的来说做好了前两步能够减少至少百分之五十的入侵,在做好第三步之后,基本可以杜绝百分之八十以上的入侵。当然最重要的还是自己要有安全意识,要多学习一些安全知识和linux的知识。

第三第四其中都有稍微提到一点,感兴趣可以看看

推荐 小猪浏览器 科技的 瞬采DEDECMS采集器。

很不错的,是一款智能的机器人软件,完全模拟人工,支持dedecms 53 5455 56 57 新闻及软件频道,内置发布接口,、附件自动采集发布本地化,无需ftp操作,简单易用,看了教程,立马就可以上手使用了。

1瞬采DEDECMS采集器,内置DEDECMS全系列 新闻、软件频道发布接口,不限制添加网站数量,轻松维护几十上百个网站;

2不绑定电脑,软件是纯绿色的,压缩包2m多,随身携带,u盘上都可以运行;

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4全自动 附件、本地化,无需手动ftp到网站附件文件夹;

5支持附件、自动上传到网盘,节约有限的网站空间,还能赚网盘下载费用;

6跟踪跟新采集,只要目标网站有新文章,立刻能采集发布到指定的版块,有多少抓多少,自动更新网站内容;

7支持采集论坛隐藏的帖子,会自动回复并采集下来;

8支持自动购买论坛的收费附件,实现完全无障碍采集;

9伪原创支持多国语言自动翻译;

10伪原创支持 词汇过滤、替换,支持繁体化,段落错排,删除句子等高级优化功能

……

功能太多,无法一一列举。

瞬采系列为收费版,可以试用小猪浏览器免费版,2者内核一样的!

小猪浏览器免费版适合少量的采集发布操作,免费版的功能超过市面大多数收费版的软件。

网站建设视频    

minj   复制这段内容后打开百度网盘手机App,操作更方便哦     

一、网站域名注册

对于一个网站来说,网站域名是非常重要的,如果您想要建立网站,必须固定一个有重要意义的域名。随意更换域名,会导致搜索引擎的降权,从而影响网站流量的流失,因此网站域名的选择与注册则要经过慎重思考,切忌随心所欲,一旦注册下来最好不要随意更换。对于企业来说,网站的域名又被称为“网络商标”,由此可见网站域名也要与品牌企业形象相符。

一个好的域名是非常有助于企业在进行网络营销推广过程中的实施效果,而且好域名能够更让用户记得住,体现出企业方面的实力,从而有利于增加企业的知名度、增强客户对你的信赖感。实践证明也如此,一个好记的域名能够为你带来更多访问量,甚至省下一笔不菲的广告费。网站域名最常用的国际后缀com/net/org,国内域名后缀有cn/comcn等等,选择一个好的域名应当是好记好用,易说而具有形象的,才能产生最大效果。

二、虚拟主机选择

虚拟主机,就是存放网站内容的空间,也可以说是虚拟主机空间。有实力的企业可以购买独立的服务器,不过虚拟主机基本能满足一般的中小企业需求了。选择网站虚拟空间时一定要注意这些地方,比如是否支持404页面设置,是否支持301跳转等常用的SEO功能,404页面的作用主要是在用户打不开网页的时候挽回一部分流量,而301跳转除了可以集中权重,还能提升SEO排名,所以支持这些功能很重要。

除此之外,一定还要有支持定期数据库备份功能,并且要考虑到IIS的兼容性,空间速度问题。

三、网站程序开发

目前主流的网站程序大体分为:ASP、PHP、JSP等,可以说不同的网站语言开发出的程序性能略有不同,目前使用最多的还是PHP语言。这里要提一下,如果您是高手的话,可以自己写代码。如果您是“小白”,并且资金充足的话,可以自建网络团队,招程序员和美工那是再好不过了。当然也可以找一家靠谱的建站外包团队,专业的事情交给专业的人员来做,那也是极好的。

一个完整的网站除了网站的内核框架,还有网站前端、LOGO、板块分类、banner、广告位等等。如今搜索引擎越来越非常注重用户体验,因此企业在建站时需要侧重网站设计的精美程度、网站打开速度、网站URL的优化、后台是否能生成全站html等问题,这些也都是在网站建设开发过程中需要考虑的方方面面的问题。

四、网站维护工作

网站基本已经建成并且上线后,整个网站建设的工作是否就完全结束了呢NO!网站虽已上线,但还要对网站安全和网站内容进行定期的维护。网站维护过程中经常会遇到一些黑客的攻击行为,例如SQL注入、跨站脚本、文本上传漏洞等问题。网站的安全隐患主要是因为有漏洞存在,而没漏洞存在的网站是不存在的。所以,网站维护的基础工作是及时的发现问题,以及定期修补漏洞。

五、网络营销推广

网络推广,包括SEO优化,通过搜索引擎规则来对网页进行优化,提高网站访问量。还包括百度推广,以及利用、空间、问答、贴吧等各种网络渠道给网站带来流量。或者借助互联网外推平台对企业网站进行全方位的推广工作。

综上所述,建设一个网站,首先要对网站的整体方案有一个规划,然后选择好域名、租用服务器或者购买空间、确定好程序开发语言、找好建站服务商、做好网站安全与维护、把握好网络运营推广方向。

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