BIND 썸네일형 리스트형 [네임서버] named 계정 생성 named 계정 생성 useradd -m -d /var/named -c "NAMED" -s /sbin/nologin -u 25 named useradd -m -d /var/named -c "NAMED" -s /sbin/nologin -u 25 named grep named /etc/passwd grep named /etc/passwd named:x:25:25:Named:/var/named:/sbin/nologin 더보기 [네임서버] bind recursive clients recursive clients recursive clients 개수 rndc status | grep recursive $ rndc status | grep recursive recursive clients: 0/900/1000 recursive clients 수가 200이상 증가 시, 외부 통신이 불가능한 상황이 발생한다. rndc recursing named.recursing (recursing queries 로그 확인) vim /var/named/data/named.recursing ; ; Recursing Queries ; ; ; Active fetch domains [view: _default] ; ; ; Active fetch domains [view: _bind] ; ; Dump compl.. 더보기 [네임서버] localhost, 127.0.0.1(1.0.0.127.in-addr.arpa) ZONE 파일 localhost, 127.0.0.1(1.0.0.127.in-addr.arpa) ZONE 파일 vim /etc/named.conf zone "." IN { type hint; file "named.ca"; }; include "/etc/named.rfc1912.zones"; include "/etc/named.root.key"; vim /etc/named.rfc1912.zones zone "localhost" IN { type master; file "named.localhost"; allow-update { none; }; }; zone "1.0.0.127.in-addr.arpa" IN { type master; file "named.loopback"; allow-update { none; }; }; .. 더보기 [네임서버] CVE-2013-3919: A recursive resolver can be crashed by a query for a malformed zone CVE-2013-3919: A recursive resolver can be crashed by a query for a malformed zone - 원격의 사용자가 특수하게 조작된 ‘recursive query’를 할 경우 발생할 수 있는 서비스거부 취약점 A defect exists which allows an attacker to crash a BIND 9 recursive resolver with a RUNTIME_CHECK error in resolver.c CVE: CVE-2013-3919 Document Version: 1.1 Posting date: 04 Jun 2013 Program Impacted: BIND 9 Versions affected: BIND 9.6-ESV-R9, 9.8.5.. 더보기 이전 1 ··· 7 8 9 10 다음
