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지금 해당 서버에 portsentry를 돌리고 있습니다. 그래서 test로 다른쪽 서버에서 포트스캔을 했더니 해당서버 /etc/hosts.deny파일에 ip가 정상적으로 적혀 있더군요.. ALL: 211.174.***.*** 그래서 포트스캔을 한 서버에서 ssh와 ftp접속을 해봤더니.. ssh는 접속이 안됐고.. ftp는 접속이 정상적으로 되더군요.. 당연히 ftp도 접속이 되지 않아야 하지 않나요? [root@MRTG root]# ssh root@211.174.***.*** ssh_exchange_identification: Connection closed by remote host [root@MRTG root]# ftp 211.174.***.*** Connected to 211.174.***.*** (211.174.***.***). 220 PorFTPd Account Server ready .. Name (211.174.***.***:root): 그렇다면 portsentry.conf에서 어딜 더 봐줘야 하나요? 제가 설정해 놓은 부분(주석제거)은 아래와 같거든요.. # Use these if you just want to be aware: TCP_PORTS="21,22,25,53,80,110,3306" UDP_PORTS="21,22,25,53,80,110,3306" ADVANCED_PORTS_TCP="1024" ADVANCED_PORTS_UDP="1024" # Default TCP ident and NetBIOS service ADVANCED_EXCLUDE_TCP="113,139" # Default UDP route (RIP), NetBIOS, bootp broadcasts. ADVANCED_EXCLUDE_UDP="520,138,137,67" # Hosts to ignore IGNORE_FILE="/usr/local/psionic/portsentry/portsentry.ignore" # Hosts that have been denied (running history) HISTORY_FILE="/usr/local/psionic/portsentry/portsentry.history" # Hosts that have been denied this session only (temporary until next restart) BLOCKED_FILE="/usr/local/psionic/portsentry/portsentry.blocked" # Generic Linux KILL_ROUTE="/sbin/route add -host $TARGET$ gw 333.444.555.666" # ipchain support for Linux (no logging of denied packets) KILL_ROUTE="/sbin/ipchains -I input -s $TARGET$ -j DENY" ................
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