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æè¿ã®CentOS7ãFedoraãªã©ã¯ããã©ã«ãã§firewalldãæå¹ã«ãªã£ã¦ãããåºæ¬çã«ãã¼ãã¯å¡ãã£ã¦ããã ãµã¼ãã¹ãæä¾ããã«ã¯ãé©åã«è¨å®ããããµã¼ãã¢ããªã±ã¼ã·ã§ã³ã¨é©åãªãã¼ãéæ¾ãå¿ è¦ã¨ãªããä¾ãã°webãµã¼ãã®å ´åapacheãªã©ãè¨å®ãèµ·åããã®å¾firewalldã®è¨å®ãè¡ã80çªã®ãã¼ããéæ¾ããå¿ è¦ãããã ãã®ãã¼ã¸ã§ã¯CentOSã®ãã¼ã解æ¾ã«ã¤ãã¦ãä¼ããããã ãããããã¼ãã¨ã¯ï¼ 念ã®ãããç´¹ä»ãã¦ãããã TCPãUDPã§éä¿¡ãè¡ãã¨ãã¯ãã³ã³ãã¥ã¼ã¿åä½ã§ã¯ãªããããã»ã¹ãã¹ã¬ããåä½ãã§éä¿¡ãè¡ãããããã®æã®éä¿¡ã®çªå£ããã¼ãã§ããã ãããã¯ã¼ã¯éã§ããåããããæ å ±ã®åºç¤ã¯ããããã³ã«ãã¨ãã¢ãã¬ã¹ãã¨ããã¼ãçªå·ããã®ä¸ã¤ã主軸ã«ãªã£ã¦ããã æ¥æ¬èªã«ãã¨ãããã¨ãã©ã®ãããªæ¹æ³ã(ãããã³ã«)ã§ãã©ãã(ã¢ãã¬ã¹)ã®ãä½å·å®¤ã(ã
ææ°çã¯ä»¥ä¸ã¨ãªãã¾ãã https://dev.classmethod.jp/etc/ec2-tcp-port-check-command-2018/ ããã«ã¡ã¯ã³ã«ã³ã¼ã©å¥½ãã®æ¢¶ã§ãã EC2ã§ã¯è²ã ãªOSãæ§ç¯ã§ãã¾ããããæ§ç¯å¾ã®é信確èªã¯ã©ã®ããã«å®æ½ãã¦ã¾ããï¼ åOSã§ä»ã®ã¤ã³ã¹ã¿ã³ã¹ã¸TCPé信確èªã®ããã«ããã¼ã«ãã¤ã³ã¹ãã¼ã«ããããICMPãªã©ã®å¥ãªãããã³ã«ã§ç¢ºèªããããã«Security Groupãä¸æ解æ¾ãã¦ãã¾ãããï¼ æ§ç¯ç´å¾ã®ç¶æ ã§ãç°¡åã«TCPãã¼ãçé確èªå¯è½ãªã³ãã³ãããç´¹ä»ãã¾ãã Amazon Linux,Ubuntu,Windows2012R2,CentOSã«ã¤ãã¦èªåãå¿ããããã®ã§ã¾ã¨ãã¦ã¿ã¾ããã ã©ãªããã®ãå½¹ã«ç«ã¦ãã°å¹¸ãã§ãã Amazon Linux åä½ç¢ºèªAMI:amzn-ami-hvm-2014.09.2.x86_64-eb
# éãã¦ãããã¼ãã¨ä½¿ç¨ãã¦ããããã»ã¹ï¼IPv4ï¼ $ sudo netstat -ltup4 sudo netstat -ltup4 Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:mysql 0.0.0.0:* LISTEN 2015/mysqld tcp 0 0 localhost:smtp 0.0.0.0:* LISTEN 2282/master tcp 0 0 0.0.0.0:10022 0.0.0.0:* LISTEN 1274/sshd udp 0 0 localhost:323 0.0.0.0:* 658/chronyd # ä¸è¨ãæ°å¤ã§ sudo nets
# æå¹ãªè¨å®ãç¢ºèª >>> firewall-cmd --list-services --zone=public --permanent dhcpv6-client # è¨å®è¿½å (sshã¨mysqlã追å ) firewall-cmd --add-service=ssh --zone=public --permanent firewall-cmd --add-service=mysql --zone=public --permanent # è¨å®åé¤(sshãåé¤) firewall-cmd --remove-service=ssh --zone=public --permanent # è¨å®ä¸è¦§ã表示 ls -lta /usr/lib/firewalld/services/ # åè¨å®æ¯ã®å å®¹ç¢ºèª cat /usr/lib/firewalld/services/ssh.xml # è¨å®ã
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