×î¼Ñʵ¼ù£ºÊ¹ÓÃÏÂÁîÐй¤¾ßÔöÇ¿ÄãµÄLinuxЧÀÍÆ÷Çå¾²
×î¼Ñʵ¼ù£ºÊ¹ÓÃÏÂÁîÐй¤¾ßÔöÇ¿ÄãµÄLinuxЧÀÍÆ÷Çå¾²
СÐò£º
LinuxЧÀÍÆ÷ÊÇÐí¶àÆóÒµºÍСÎÒ˽ÈËÓû§Ê×Ñ¡µÄ²Ù×÷ϵͳ£¬ËüÓµÓо«²ÊµÄÎȹÌÐÔºÍÇå¾²ÐÔ¡£È»¶ø£¬Ã»ÓнÓÄÉÊʵ±µÄÇå¾²²½·¥£¬Ð§ÀÍÆ÷ÈÔÈ»ÃæÁÙ×ÅDZÔÚµÄÍþв¡£±¾ÎĽ«ÏÈÈÝһЩʹÓÃÏÂÁîÐй¤¾ßÀ´ÔöÇ¿LinuxЧÀÍÆ÷Çå¾²µÄ×î¼Ñʵ¼ù£¬×ÊÖúÄã±£»¤Ð§ÀÍÆ÷ÃâÊܶñÒâÈëÇÖÕߵĹ¥»÷¡£
Ò»¡¢Ê¹Ó÷À»ðǽ±£»¤Ð§ÀÍÆ÷
·À»ðǽÊÇЧÀÍÆ÷Çå¾²µÄµÚÒ»µÀ·ÀµØ£¬Ëü¿ÉÒÔ¹ýÂËÍøÂçÁ÷Á¿²¢½öÔÊÐíÊÚȨµÄÅþÁ¬Í¨¹ý¡£ÔÚLinuxÖУ¬¿ÉÒÔʹÓÃiptables¹¤¾ßÀ´ÉèÖúÍÖÎÀí·À»ðǽ¹æÔò¡£ÒÔÏÂÊÇһЩ³£ÓõÄiptablesÏÂÁîʾÀý£º
ÔÊÐíÌض¨¶Ë¿ÚµÄÅþÁ¬£º
iptables -A INPUT -p tcp --dport 22 -j ACCEPT iptables -A INPUT -p tcp --dport 80 -j ACCEPT
µÇ¼ºó¸´ÖÆ
¾Ü¾øËùÓÐÆäËûÅþÁ¬£º
iptables -P INPUT DROP
µÇ¼ºó¸´ÖÆ
ÔÊÐíÒѽ¨ÉèµÄÅþÁ¬ºÍÏà¹ØµÄÅþÁ¬£º
iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
µÇ¼ºó¸´ÖÆ
ÏÔʾĿ½ñµÄ·À»ðǽ¹æÔò£º
iptables -L
µÇ¼ºó¸´ÖÆ
ÒÔÉÏÏÂÁîÖ»ÊÇһЩ¼òÆÓµÄÀý×Ó£¬Äã¿ÉÒÔƾ֤×Ô¼ºµÄÐèÇó¶¨ÖƸüÖØ´óµÄ¹æÔòÀ´±£»¤Ð§ÀÍÆ÷¡£
¶þ¡¢Ê¹ÓÃFail2Ban·ÀÓù±©Á¦Æƽâ
Fail2BanÊÇÒ»¿îÊ¢ÐеÄÈëÇÖ·ÀÓù¹¤¾ß£¬Ëü¿ÉÒÔ¼ì²âµ½Öظ´µÇ¼ʧ°ÜµÄʵÑ飬²¢¶ÔÔ´IPµØµã¾ÙÐÐÔÝʱ·â½û¡£ÒÔÏÂÊÇFail2BanµÄ×°ÖúÍÉèÖÃʾÀý£º
×°ÖÃFail2Ban£º
sudo apt-get install fail2ban
µÇ¼ºó¸´ÖÆ
ÉèÖÃFail2Ban£º
Çë±à¼/etc/fail2ban/jail.confÎļþÒÔÆôÓúÍÉèÖÃFail2Ban¹æÔò¡£
Æô¶¯Fail2Ban£º
sudo service fail2ban start
µÇ¼ºó¸´ÖÆ
Fail2Ban½«»á¼àÊӵǼÈÕÖ¾Îļþ£¨Èç/var/log/auth.log£©£¬²¢ÔÚ¼ì²âµ½±©Á¦ÆƽâʵÑéºó£¬×Ô¶¯·â½ûÔ´IPµØµã¡£
Èý¡¢Ê¹ÓÃSSHÃÜÔ¿µÇ¼
SSHÃÜÔ¿µÇ¼ÊÇÒ»ÖÖ¸üÇå¾²µÄµÇ¼·½·¨£¬Ïà½ÏÓڹŰåµÄ»ùÓÚÃÜÂëµÄµÇ¼·½·¨£¬ËüÌṩÁ˸ü¸ßµÄÇå¾²ÐÔ¡£ÒÔÏÂÊÇʹÓÃSSHÃÜÔ¿µÇ¼µÄʾÀý£º
ÌìÉúSSHÃÜÔ¿£º
ssh-keygen -t rsa
µÇ¼ºó¸´ÖÆ
½«¹«Ô¿¸´ÖƵ½Ð§ÀÍÆ÷£º
ssh-copy-id user@server_ip
µÇ¼ºó¸´ÖÆ
½ûÓÃÃÜÂëµÇ¼£º
Çë±à¼/etc/ssh/sshd_configÎļþ£¬½«PasswordAuthenticationÉèÖÃΪno£¬²¢ÖØÆôSSHЧÀÍ¡£
ʹÓÃSSHÃÜÔ¿µÇ¼ºó£¬Ä㽫²»ÔÙÒÀÀµÓÚÈõÃÜÂ룬´ó´óÌá¸ßÁËЧÀÍÆ÷µÄÇå¾²ÐÔ¡£
ËÄ¡¢Ê¹ÓÃSSH¶Ë¿Úת·¢¾ÙÐÐÇå¾²»á¼û
SSH¶Ë¿Úת·¢£¨SSH port forwarding£©¿ÉÒÔ×ÊÖúÄãͨ¹ý¼ÓÃܵÄSSHÅþÁ¬ÔÚÍâµØºÍÔ¶³ÌÖ÷»úÖ®¼ä½¨ÉèÇå¾²µÄͨѶ¡£ÒÔÏÂÊÇSSH¶Ë¿Úת·¢µÄʾÀý£º
ÍâµØ¶Ë¿Úת·¢£º
ssh -L local_port:remote_host:remote_port user@server_ip
µÇ¼ºó¸´ÖÆ
Ô¶³Ì¶Ë¿Úת·¢£º
ssh -R remote_port:local_host:local_port user@server_ip
µÇ¼ºó¸´ÖÆ
ͨ¹ýSSH¶Ë¿Úת·¢£¬Äã¿ÉÒÔÔÚ²»Ö±½Ó̻¶ЧÀÍÆ÷µÄÇéÐÎÏ£¬Çå¾²µØ»á¼ûÔ¶³ÌÖ÷»úµÄЧÀÍ¡£
½áÂÛ£º
±¾ÎÄÏÈÈÝÁËһЩʹÓÃÏÂÁîÐй¤¾ßÀ´ÔöÇ¿LinuxЧÀÍÆ÷Çå¾²µÄ×î¼Ñʵ¼ù¡£Í¨¹ýʹÓ÷À»ðǽ¡¢Fail2Ban¡¢SSHÃÜÔ¿µÇ¼ºÍSSH¶Ë¿Úת·¢µÈ¹¤¾ß£¬Äã¿ÉÒÔÓÐÓõر£»¤Ð§ÀÍÆ÷ÃâÊܶñÒâÈëÇֵĹ¥»÷¡£ËäÈ»£¬ÕâЩֻÊÇЧÀÍÆ÷Çå¾²µÄ»ù±¾Êµ¼ù£¬ÎªÁËÌá¸ßЧÀÍÆ÷µÄÇå¾²ÐÔ£¬Ä㻹ÐèÒª°´ÆÚ¸üÐÂÈí¼þ°ü¡¢Ê¹ÓÃÇ¿ÃÜÂëºÍ°´ÆÚ±¸·ÝµÈ¡£Ï£ÍûÕâЩʵ¼ùÄܹ»×ÊÖúÄ㽨ÉèÒ»¸ö¸üÇå¾²µÄLinuxЧÀÍÆ÷ÇéÐΡ£
ÒÔÉϾÍÊÇ×î¼Ñʵ¼ù£ºÊ¹ÓÃÏÂÁîÐй¤¾ßÔöÇ¿ÄãµÄLinuxЧÀÍÆ÷Çå¾²µÄÏêϸÄÚÈÝ£¬¸ü¶àÇë¹Ø×¢±¾ÍøÄÚÆäËüÏà¹ØÎÄÕ£¡