[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 complete

blackhole에 IP 등록

vi /etc/named.conf

options {
        blackhole {131.123.123.19;};
};

rndc relocad