테스트 사이트 - 개발 중인 베타 버전입니다

iptables 관련

· 13년 전 · 383
Describe iptables 관련 자료 here

  • 체인 생성 (-N).
  • 체인 제거 (-X).
  • 체인 정책 변경 (-P)
  • 체인 규칙 나열 (-L)
  • 체인 규칙들 삭제 (-F)
  • 체인 규칙 패킷과 바이트 카운드 0 (-Z)

체인 내부 규칙 조작 


  • 규칙 추가 (-A)
  • 규칙 삽입 (-I)
  • 규칙 교환 (-R)
  • 규칙 제거 (-D) 

세부 내용 


  • 127.0.0.1 은 'loopback' 인터페이스
  • 테스트에 유용
byoungguk@linuxtip:~$ ping -c 1 127.0.0.1
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.040 ms

--- 127.0.0.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.040/0.040/0.040/0.000 ms

[root@localhost ~]# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination  

  • ping 막기
[root@localhost ~]# iptables -A INPUT -s 127.0.0.1 -p icmp -j DROP
[root@localhost ~]# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
DROP       icmp --  127.0.0.1            0.0.0.0/0          

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         
[root@localhost ~]# ping -c 1 127.0.0.1
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.

--- 127.0.0.1 ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms


  • 규칙 제거
[root@localhost ~]# iptables -D INPUT 1
[root@localhost ~]# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination  
[root@localhost ~]# iptables -D INPUT -s 127.0.0.1 -p icmp -j DROP
[root@localhost ~]# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

  • 옵션
'-s', '--source', '--src'
'-d', '--destination', '--dst'
'-s ! localhost' => localhost 로 부터 오는 패킷 아닌 경우
'-p ! TCP'
'-i'('--in-interface')와 '-o'('--out-interface')

  • 체인 생성
[root@localhost ~]# iptables -N byoungguk
[root@localhost ~]# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain byoungguk (0 references)
target     prot opt source               destination

  • 체인 삭제
[root@localhost ~]# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination 

  • 체인 세부 내용 비우기
[root@localhost ~]# iptables -F FORWARD

  • 모든 체인 내용 비우기
[root@localhost ~]# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
DROP       icmp --  127.0.0.1            0.0.0.0/0           

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
DROP       icmp --  127.0.0.1            0.0.0.0/0           

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         
DROP       icmp --  127.0.0.1            0.0.0.0/0           
[root@localhost ~]# iptables -F
[root@localhost ~]# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination    

댓글 작성

댓글을 작성하시려면 로그인이 필요합니다.

로그인하기

게시글 목록

번호 제목
32341
32339
32326
32325
32322
32319
32318
32316
32315
32313
32312
32311
32310
32304
32303
32300
32293
32292
32291
32285
32284
32275
32271
32268
32265
32261
32258
32257
32255
32254
32253
32251
32250
32249
32247
32246
32245
32244
32243
32242
32241
32240
32239
32238
32237
32236
32232
32229
32228
32227
32217
32215
32214
32213
32211
32207
32196
32193
32192
32190
32188
32186
32184
32173
32172
32171
32167
32165
32163
32162
32158
32157
32155
32151
32149
32135
32132
32127
32125
32122
32120
32119
32117
32116
32115
32114
32112
32111
32109
32107
32104
32103
32102
32101
32094
32089
20404
31036
8279
8268