Добрый день. CentOS 9.
Ввожу правила в iptables:
iptables -A OUTPUT -p tcp --dport 8080 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j ACCEPT
Там ещё пара правил, но не суть, ниже увидите.
Делаю iptables -L и получаю логичный вывод:
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
ACCEPT icmp -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:ssh
REJECT all -- anywhere anywhere reject-with icmp-host-prohibited
ACCEPT tcp -- anywhere anywhere tcp dpt:https
Chain FORWARD (policy ACCEPT)
target prot opt source destination
REJECT all -- anywhere anywhere reject-with icmp-host-prohibited
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT tcp -- anywhere anywhere tcp dpt:webcache
Затем делаю iptables-save и получаю такое:
[root@frontend1 ~]# iptables-save
# Generated by iptables-save v1.8.8 (nf_tables) on Sun May 7 12:16:53 2023
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [179:23956]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
-A OUTPUT -p tcp -m tcp --dport 8080 -j ACCEPT
COMMIT
# Completed on Sun May 7 12:16:53 2023
Вопрос. Почему iptables -L выводит правила, согласно разметке INPUT или OUTPUT, а iptables-save Всё вообще суёт в OUTPUT?
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