在网络环境下，网络被入侵和攻击，可谓是防不胜防，如入侵服务器窃取数据、勒索，这类事件屡见不鲜，让许多企业都很苦恼。总结经验教训，吃一堑长一智，网络病毒、黑客无时无处不在，我们要保持警惕，防患于未然，制定好防范措施，才能保证服务器平稳安全。
服务器被入侵了怎么办，针对服务器防御入侵方面有以下这些措施：
1. 服务器最好定期杀毒、查毒。比如，电脑管家、360安全卫士，更新病毒库为最新版本；
2. 做好服务器文件备份。有条件的定期将重要磁盘进行镜像备份存放到安全目录存放；
3. 服务器最好开启防火墙设置，然后开放相关的安全访问端口，如80，22，443等；
4. 查看系统事件安全日志，查看是否有黑客入侵，查到相关的可疑ip，进行限制ip访问，
5. 服务器可以设置禁止ping命令，让黑客ping不到；
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