複数の仮想マシン (ゲスト) を備えた KVM サーバー (ホスト) があります。
私の目標は、ホストがポート 222 を、ssh サービスを実行しているゲストのポート 22 に転送することです。
これ作品...
iptables -I OUTPUT -d 0.0.0.0/0 -j ACCEPT
iptables -I FORWARD -d 0.0.0.0/0 -j ACCEPT
iptables -I INPUT -d 0.0.0.0/0 -j ACCEPT
iptables -t nat -I PREROUTING -d 0.0.0.0/0 -p tcp --dport 222 -j DNAT --to-destination 10.1.0.9:22
これ動作しない...
firewall-cmd --permanent --zone=public --direct --add-rule ipv4 filter OUTPUT 0 -d 0.0.0.0/0 -j ACCEPT
firewall-cmd --permanent --zone=public --direct --add-rule ipv4 filter FORWARD 0 -d 0.0.0.0/0 -j ACCEPT
firewall-cmd --permanent --zone=public --direct --add-rule ipv4 filter INPUT 0 -d 0.0.0.0/0 -j ACCEPT
firewall-cmd --permanent --zone=public --direct --add-rule ipv4 nat PREROUTING 0 -d 0.0.0.0/0 -p tcp --dport 222 -j DNAT --to-destination 10.1.0.9:22
firewall-cmd --reload
これ働かないで...
firewall-cmd --permanent --zone=public --add-forward-port=port=222:proto=tcp:toport=22:toaddr=10.1.0.9
firewall-cmd --reload
質問:設定されたルールがfirewall-cmd
機能しないのはなぜですか?
注I:これはfirewall-cmd
CentOS 7 のデフォルトのファイアウォール サービスです。これは解決策のない問題のように思えます。多くのフォーラムを検索しましたが、何も機能しません。これは CentOS 7 の制限またはバグであると信じ始めていますfirewall-cmd
...
注 II:それ自体がこれを可能にする手段を提供していることはわかっていますssh
が、ユーザーがゲストに直接アクセスできるように、このプロセスを「透過的」にしたいと考えています。
[参照: https://serverfault.com/q/915257/276753、 https://serverfault.com/q/980223/276753、 https://sebastianblade.com/centos7 での SSH ポートの変更方法/、 https://www.rootusers.com/how-to-use-firewalld-rich-rules-and-zones-for-filtering-and-nat/、 https://www.centos.org/forums/viewtopic.php?f=50&t=71454]
症状:
コマンド...
ssh root@[HOST_IP] -p 222
...次のエラーが返されます...
ssh: ホスト 172.16.13.8 ポート 222 に接続: 接続が拒否されました
更新 I:
@mwfearnley iptables-save 出力...
iptables保存 -動作します...
[root@localhost ~]# iptables-save
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:17 2019
*nat
:PREROUTING ACCEPT [1:70]
:INPUT ACCEPT [1:70]
:OUTPUT ACCEPT [2:146]
:POSTROUTING ACCEPT [3:206]
:OUTPUT_direct - [0:0]
:POSTROUTING_ZONES - [0:0]
:POSTROUTING_ZONES_SOURCE - [0:0]
:POSTROUTING_direct - [0:0]
:POST_public - [0:0]
:POST_public_allow - [0:0]
:POST_public_deny - [0:0]
:POST_public_log - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -p tcp -m tcp --dport 222 -j DNAT --to-destination 10.1.0.9:22
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A OUTPUT -j OUTPUT_direct
-A POSTROUTING -s 10.1.0.0/24 -d 224.0.0.0/24 -j RETURN
-A POSTROUTING -s 10.1.0.0/24 -d 255.255.255.255/32 -j RETURN
-A POSTROUTING -s 10.1.0.0/24 ! -d 10.1.0.0/24 -p tcp -j MASQUERADE --to-ports 1024-65535
-A POSTROUTING -s 10.1.0.0/24 ! -d 10.1.0.0/24 -p udp -j MASQUERADE --to-ports 1024-65535
-A POSTROUTING -s 10.1.0.0/24 ! -d 10.1.0.0/24 -j MASQUERADE
-A POSTROUTING -j POSTROUTING_direct
-A POSTROUTING -j POSTROUTING_ZONES_SOURCE
-A POSTROUTING -j POSTROUTING_ZONES
-A POSTROUTING_ZONES -o ens33 -g POST_public
-A POSTROUTING_ZONES -o br0 -g POST_public
-A POSTROUTING_ZONES -g POST_public
-A POST_public -j POST_public_log
-A POST_public -j POST_public_deny
-A POST_public -j POST_public_allow
-A PREROUTING_ZONES -i ens33 -g PRE_public
-A PREROUTING_ZONES -i br0 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
COMMIT
# Completed on Thu Aug 22 11:59:17 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:17 2019
*mangle
:PREROUTING ACCEPT [672:77587]
:INPUT ACCEPT [610:68993]
:FORWARD ACCEPT [58:7886]
:OUTPUT ACCEPT [655:151604]
:POSTROUTING ACCEPT [713:159490]
:FORWARD_direct - [0:0]
:INPUT_direct - [0:0]
:OUTPUT_direct - [0:0]
:POSTROUTING_direct - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A INPUT -j INPUT_direct
-A FORWARD -j FORWARD_direct
-A OUTPUT -j OUTPUT_direct
-A POSTROUTING -j POSTROUTING_direct
-A PREROUTING_ZONES -i ens33 -g PRE_public
-A PREROUTING_ZONES -i br0 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
COMMIT
# Completed on Thu Aug 22 11:59:17 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:17 2019
*security
:INPUT ACCEPT [609:68793]
:FORWARD ACCEPT [58:7886]
:OUTPUT ACCEPT [660:152010]
:FORWARD_direct - [0:0]
:INPUT_direct - [0:0]
:OUTPUT_direct - [0:0]
-A INPUT -j INPUT_direct
-A FORWARD -j FORWARD_direct
-A OUTPUT -j OUTPUT_direct
COMMIT
# Completed on Thu Aug 22 11:59:17 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:17 2019
*raw
:PREROUTING ACCEPT [672:77587]
:OUTPUT ACCEPT [655:151604]
:OUTPUT_direct - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A OUTPUT -j OUTPUT_direct
-A PREROUTING_ZONES -i ens33 -g PRE_public
-A PREROUTING_ZONES -i br0 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
COMMIT
# Completed on Thu Aug 22 11:59:17 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:17 2019
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:FORWARD_IN_ZONES - [0:0]
:FORWARD_IN_ZONES_SOURCE - [0:0]
:FORWARD_OUT_ZONES - [0:0]
:FORWARD_OUT_ZONES_SOURCE - [0:0]
:FORWARD_direct - [0:0]
:FWDI_public - [0:0]
:FWDI_public_allow - [0:0]
:FWDI_public_deny - [0:0]
:FWDI_public_log - [0:0]
:FWDO_public - [0:0]
:FWDO_public_allow - [0:0]
:FWDO_public_deny - [0:0]
:FWDO_public_log - [0:0]
:INPUT_ZONES - [0:0]
:INPUT_ZONES_SOURCE - [0:0]
:INPUT_direct - [0:0]
:IN_public - [0:0]
:IN_public_allow - [0:0]
:IN_public_deny - [0:0]
:IN_public_log - [0:0]
:OUTPUT_direct - [0:0]
-A INPUT -j ACCEPT
-A INPUT -i virbr0 -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -i virbr0 -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -i virbr0 -p udp -m udp --dport 67 -j ACCEPT
-A INPUT -i virbr0 -p tcp -m tcp --dport 67 -j ACCEPT
-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -j INPUT_direct
-A INPUT -j INPUT_ZONES_SOURCE
-A INPUT -j INPUT_ZONES
-A INPUT -m conntrack --ctstate INVALID -j DROP
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j ACCEPT
-A FORWARD -d 10.1.0.0/24 -o virbr0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -s 10.1.0.0/24 -i virbr0 -j ACCEPT
-A FORWARD -i virbr0 -o virbr0 -j ACCEPT
-A FORWARD -o virbr0 -j REJECT --reject-with icmp-port-unreachable
-A FORWARD -i virbr0 -j REJECT --reject-with icmp-port-unreachable
-A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -i lo -j ACCEPT
-A FORWARD -j FORWARD_direct
-A FORWARD -j FORWARD_IN_ZONES_SOURCE
-A FORWARD -j FORWARD_IN_ZONES
-A FORWARD -j FORWARD_OUT_ZONES_SOURCE
-A FORWARD -j FORWARD_OUT_ZONES
-A FORWARD -m conntrack --ctstate INVALID -j DROP
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
-A OUTPUT -j ACCEPT
-A OUTPUT -o virbr0 -p udp -m udp --dport 68 -j ACCEPT
-A OUTPUT -j OUTPUT_direct
-A FORWARD_IN_ZONES -i ens33 -g FWDI_public
-A FORWARD_IN_ZONES -i br0 -g FWDI_public
-A FORWARD_IN_ZONES -g FWDI_public
-A FORWARD_OUT_ZONES -o ens33 -g FWDO_public
-A FORWARD_OUT_ZONES -o br0 -g FWDO_public
-A FORWARD_OUT_ZONES -g FWDO_public
-A FWDI_public -j FWDI_public_log
-A FWDI_public -j FWDI_public_deny
-A FWDI_public -j FWDI_public_allow
-A FWDI_public -p icmp -j ACCEPT
-A FWDO_public -j FWDO_public_log
-A FWDO_public -j FWDO_public_deny
-A FWDO_public -j FWDO_public_allow
-A INPUT_ZONES -i ens33 -g IN_public
-A INPUT_ZONES -i br0 -g IN_public
-A INPUT_ZONES -g IN_public
-A IN_public -j IN_public_log
-A IN_public -j IN_public_deny
-A IN_public -j IN_public_allow
-A IN_public -p icmp -j ACCEPT
-A IN_public_allow -p tcp -m tcp --dport 22 -m conntrack --ctstate NEW -j ACCEPT
COMMIT
# Completed on Thu Aug 22 11:59:17 2019
iptables保存 -動作しません...
[root@localhost ~]# iptables-save
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:16 2019
*nat
:PREROUTING ACCEPT [1:72]
:INPUT ACCEPT [1:72]
:OUTPUT ACCEPT [5:371]
:POSTROUTING ACCEPT [5:371]
:OUTPUT_direct - [0:0]
:POSTROUTING_ZONES - [0:0]
:POSTROUTING_ZONES_SOURCE - [0:0]
:POSTROUTING_direct - [0:0]
:POST_public - [0:0]
:POST_public_allow - [0:0]
:POST_public_deny - [0:0]
:POST_public_log - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A OUTPUT -j OUTPUT_direct
-A POSTROUTING -s 10.1.0.0/24 -d 224.0.0.0/24 -j RETURN
-A POSTROUTING -s 10.1.0.0/24 -d 255.255.255.255/32 -j RETURN
-A POSTROUTING -s 10.1.0.0/24 ! -d 10.1.0.0/24 -p tcp -j MASQUERADE --to-ports 1024-65535
-A POSTROUTING -s 10.1.0.0/24 ! -d 10.1.0.0/24 -p udp -j MASQUERADE --to-ports 1024-65535
-A POSTROUTING -s 10.1.0.0/24 ! -d 10.1.0.0/24 -j MASQUERADE
-A POSTROUTING -j POSTROUTING_direct
-A POSTROUTING -j POSTROUTING_ZONES_SOURCE
-A POSTROUTING -j POSTROUTING_ZONES
-A POSTROUTING_ZONES -o ens33 -g POST_public
-A POSTROUTING_ZONES -o br0 -g POST_public
-A POSTROUTING_ZONES -g POST_public
-A POST_public -j POST_public_log
-A POST_public -j POST_public_deny
-A POST_public -j POST_public_allow
-A PREROUTING_ZONES -i ens33 -g PRE_public
-A PREROUTING_ZONES -i br0 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PREROUTING_direct -p tcp -m tcp --dport 222 -j DNAT --to-destination 10.1.0.9:22
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
COMMIT
# Completed on Thu Aug 22 11:59:16 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:16 2019
*mangle
:PREROUTING ACCEPT [12:1319]
:INPUT ACCEPT [11:1259]
:FORWARD ACCEPT [1:60]
:OUTPUT ACCEPT [12:1070]
:POSTROUTING ACCEPT [12:1070]
:FORWARD_direct - [0:0]
:INPUT_direct - [0:0]
:OUTPUT_direct - [0:0]
:POSTROUTING_direct - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A INPUT -j INPUT_direct
-A FORWARD -j FORWARD_direct
-A OUTPUT -j OUTPUT_direct
-A POSTROUTING -j POSTROUTING_direct
-A PREROUTING_ZONES -i ens33 -g PRE_public
-A PREROUTING_ZONES -i br0 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
COMMIT
# Completed on Thu Aug 22 11:59:16 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:16 2019
*security
:INPUT ACCEPT [11:1259]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [12:1070]
:FORWARD_direct - [0:0]
:INPUT_direct - [0:0]
:OUTPUT_direct - [0:0]
-A INPUT -j INPUT_direct
-A FORWARD -j FORWARD_direct
-A OUTPUT -j OUTPUT_direct
COMMIT
# Completed on Thu Aug 22 11:59:16 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:16 2019
*raw
:PREROUTING ACCEPT [12:1319]
:OUTPUT ACCEPT [12:1070]
:OUTPUT_direct - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A OUTPUT -j OUTPUT_direct
-A PREROUTING_ZONES -i ens33 -g PRE_public
-A PREROUTING_ZONES -i br0 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
COMMIT
# Completed on Thu Aug 22 11:59:16 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:16 2019
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:FORWARD_IN_ZONES - [0:0]
:FORWARD_IN_ZONES_SOURCE - [0:0]
:FORWARD_OUT_ZONES - [0:0]
:FORWARD_OUT_ZONES_SOURCE - [0:0]
:FORWARD_direct - [0:0]
:FWDI_public - [0:0]
:FWDI_public_allow - [0:0]
:FWDI_public_deny - [0:0]
:FWDI_public_log - [0:0]
:FWDO_public - [0:0]
:FWDO_public_allow - [0:0]
:FWDO_public_deny - [0:0]
:FWDO_public_log - [0:0]
:INPUT_ZONES - [0:0]
:INPUT_ZONES_SOURCE - [0:0]
:INPUT_direct - [0:0]
:IN_public - [0:0]
:IN_public_allow - [0:0]
:IN_public_deny - [0:0]
:IN_public_log - [0:0]
:OUTPUT_direct - [0:0]
-A INPUT -i virbr0 -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -i virbr0 -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -i virbr0 -p udp -m udp --dport 67 -j ACCEPT
-A INPUT -i virbr0 -p tcp -m tcp --dport 67 -j ACCEPT
-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -j INPUT_direct
-A INPUT -j INPUT_ZONES_SOURCE
-A INPUT -j INPUT_ZONES
-A INPUT -m conntrack --ctstate INVALID -j DROP
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -d 10.1.0.0/24 -o virbr0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -s 10.1.0.0/24 -i virbr0 -j ACCEPT
-A FORWARD -i virbr0 -o virbr0 -j ACCEPT
-A FORWARD -o virbr0 -j REJECT --reject-with icmp-port-unreachable
-A FORWARD -i virbr0 -j REJECT --reject-with icmp-port-unreachable
-A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -i lo -j ACCEPT
-A FORWARD -j FORWARD_direct
-A FORWARD -j FORWARD_IN_ZONES_SOURCE
-A FORWARD -j FORWARD_IN_ZONES
-A FORWARD -j FORWARD_OUT_ZONES_SOURCE
-A FORWARD -j FORWARD_OUT_ZONES
-A FORWARD -m conntrack --ctstate INVALID -j DROP
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
-A OUTPUT -o virbr0 -p udp -m udp --dport 68 -j ACCEPT
-A OUTPUT -j OUTPUT_direct
-A FORWARD_IN_ZONES -i ens33 -g FWDI_public
-A FORWARD_IN_ZONES -i br0 -g FWDI_public
-A FORWARD_IN_ZONES -g FWDI_public
-A FORWARD_OUT_ZONES -o ens33 -g FWDO_public
-A FORWARD_OUT_ZONES -o br0 -g FWDO_public
-A FORWARD_OUT_ZONES -g FWDO_public
-A FORWARD_direct -j ACCEPT
-A FWDI_public -j FWDI_public_log
-A FWDI_public -j FWDI_public_deny
-A FWDI_public -j FWDI_public_allow
-A FWDI_public -p icmp -j ACCEPT
-A FWDO_public -j FWDO_public_log
-A FWDO_public -j FWDO_public_deny
-A FWDO_public -j FWDO_public_allow
-A INPUT_ZONES -i ens33 -g IN_public
-A INPUT_ZONES -i br0 -g IN_public
-A INPUT_ZONES -g IN_public
-A INPUT_direct -j ACCEPT
-A IN_public -j IN_public_log
-A IN_public -j IN_public_deny
-A IN_public -j IN_public_allow
-A IN_public -p icmp -j ACCEPT
-A IN_public_allow -p tcp -m tcp --dport 22 -m conntrack --ctstate NEW -j ACCEPT
-A OUTPUT_direct -j ACCEPT
COMMIT
# Completed on Thu Aug 22 11:59:16 2019
iptables保存 -働きすぎないでください...
[root@localhost ~]# iptables-save
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:36 2019
*nat
:PREROUTING ACCEPT [5:371]
:INPUT ACCEPT [1:67]
:OUTPUT ACCEPT [2:134]
:POSTROUTING ACCEPT [2:134]
:OUTPUT_direct - [0:0]
:POSTROUTING_ZONES - [0:0]
:POSTROUTING_ZONES_SOURCE - [0:0]
:POSTROUTING_direct - [0:0]
:POST_public - [0:0]
:POST_public_allow - [0:0]
:POST_public_deny - [0:0]
:POST_public_log - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A OUTPUT -j OUTPUT_direct
-A POSTROUTING -s 10.1.0.0/24 -d 224.0.0.0/24 -j RETURN
-A POSTROUTING -s 10.1.0.0/24 -d 255.255.255.255/32 -j RETURN
-A POSTROUTING -s 10.1.0.0/24 ! -d 10.1.0.0/24 -p tcp -j MASQUERADE --to-ports 1024-65535
-A POSTROUTING -s 10.1.0.0/24 ! -d 10.1.0.0/24 -p udp -j MASQUERADE --to-ports 1024-65535
-A POSTROUTING -s 10.1.0.0/24 ! -d 10.1.0.0/24 -j MASQUERADE
-A POSTROUTING -j POSTROUTING_direct
-A POSTROUTING -j POSTROUTING_ZONES_SOURCE
-A POSTROUTING -j POSTROUTING_ZONES
-A POSTROUTING_ZONES -o ens33 -g POST_public
-A POSTROUTING_ZONES -o br0 -g POST_public
-A POSTROUTING_ZONES -g POST_public
-A POST_public -j POST_public_log
-A POST_public -j POST_public_deny
-A POST_public -j POST_public_allow
-A PREROUTING_ZONES -i ens33 -g PRE_public
-A PREROUTING_ZONES -i br0 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
-A PRE_public_allow -p tcp -m mark --mark 0x64 -j DNAT --to-destination 10.1.0.9:22
COMMIT
# Completed on Thu Aug 22 11:59:36 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:36 2019
*mangle
:PREROUTING ACCEPT [17:1649]
:INPUT ACCEPT [12:1285]
:FORWARD ACCEPT [5:364]
:OUTPUT ACCEPT [10:3037]
:POSTROUTING ACCEPT [14:3341]
:FORWARD_direct - [0:0]
:INPUT_direct - [0:0]
:OUTPUT_direct - [0:0]
:POSTROUTING_direct - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A INPUT -j INPUT_direct
-A FORWARD -j FORWARD_direct
-A OUTPUT -j OUTPUT_direct
-A POSTROUTING -j POSTROUTING_direct
-A PREROUTING_ZONES -i ens33 -g PRE_public
-A PREROUTING_ZONES -i br0 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
-A PRE_public_allow -p tcp -m tcp --dport 222 -j MARK --set-xmark 0x64/0xffffffff
COMMIT
# Completed on Thu Aug 22 11:59:36 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:36 2019
*security
:INPUT ACCEPT [12:1285]
:FORWARD ACCEPT [4:304]
:OUTPUT ACCEPT [10:3037]
:FORWARD_direct - [0:0]
:INPUT_direct - [0:0]
:OUTPUT_direct - [0:0]
-A INPUT -j INPUT_direct
-A FORWARD -j FORWARD_direct
-A OUTPUT -j OUTPUT_direct
COMMIT
# Completed on Thu Aug 22 11:59:36 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:36 2019
*raw
:PREROUTING ACCEPT [17:1649]
:OUTPUT ACCEPT [10:3037]
:OUTPUT_direct - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A OUTPUT -j OUTPUT_direct
-A PREROUTING_ZONES -i ens33 -g PRE_public
-A PREROUTING_ZONES -i br0 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
COMMIT
# Completed on Thu Aug 22 11:59:36 2019
# Generated by iptables-save v1.4.21 on Thu Aug 22 11:59:36 2019
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [8:2813]
:FORWARD_IN_ZONES - [0:0]
:FORWARD_IN_ZONES_SOURCE - [0:0]
:FORWARD_OUT_ZONES - [0:0]
:FORWARD_OUT_ZONES_SOURCE - [0:0]
:FORWARD_direct - [0:0]
:FWDI_public - [0:0]
:FWDI_public_allow - [0:0]
:FWDI_public_deny - [0:0]
:FWDI_public_log - [0:0]
:FWDO_public - [0:0]
:FWDO_public_allow - [0:0]
:FWDO_public_deny - [0:0]
:FWDO_public_log - [0:0]
:INPUT_ZONES - [0:0]
:INPUT_ZONES_SOURCE - [0:0]
:INPUT_direct - [0:0]
:IN_public - [0:0]
:IN_public_allow - [0:0]
:IN_public_deny - [0:0]
:IN_public_log - [0:0]
:OUTPUT_direct - [0:0]
-A INPUT -i virbr0 -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -i virbr0 -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -i virbr0 -p udp -m udp --dport 67 -j ACCEPT
-A INPUT -i virbr0 -p tcp -m tcp --dport 67 -j ACCEPT
-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -j INPUT_direct
-A INPUT -j INPUT_ZONES_SOURCE
-A INPUT -j INPUT_ZONES
-A INPUT -m conntrack --ctstate INVALID -j DROP
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -d 10.1.0.0/24 -o virbr0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -s 10.1.0.0/24 -i virbr0 -j ACCEPT
-A FORWARD -i virbr0 -o virbr0 -j ACCEPT
-A FORWARD -o virbr0 -j REJECT --reject-with icmp-port-unreachable
-A FORWARD -i virbr0 -j REJECT --reject-with icmp-port-unreachable
-A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -i lo -j ACCEPT
-A FORWARD -j FORWARD_direct
-A FORWARD -j FORWARD_IN_ZONES_SOURCE
-A FORWARD -j FORWARD_IN_ZONES
-A FORWARD -j FORWARD_OUT_ZONES_SOURCE
-A FORWARD -j FORWARD_OUT_ZONES
-A FORWARD -m conntrack --ctstate INVALID -j DROP
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
-A OUTPUT -o virbr0 -p udp -m udp --dport 68 -j ACCEPT
-A OUTPUT -j OUTPUT_direct
-A FORWARD_IN_ZONES -i ens33 -g FWDI_public
-A FORWARD_IN_ZONES -i br0 -g FWDI_public
-A FORWARD_IN_ZONES -g FWDI_public
-A FORWARD_OUT_ZONES -o ens33 -g FWDO_public
-A FORWARD_OUT_ZONES -o br0 -g FWDO_public
-A FORWARD_OUT_ZONES -g FWDO_public
-A FWDI_public -j FWDI_public_log
-A FWDI_public -j FWDI_public_deny
-A FWDI_public -j FWDI_public_allow
-A FWDI_public -p icmp -j ACCEPT
-A FWDI_public_allow -m conntrack --ctstate NEW -m mark --mark 0x64 -j ACCEPT
-A FWDO_public -j FWDO_public_log
-A FWDO_public -j FWDO_public_deny
-A FWDO_public -j FWDO_public_allow
-A INPUT_ZONES -i ens33 -g IN_public
-A INPUT_ZONES -i br0 -g IN_public
-A INPUT_ZONES -g IN_public
-A IN_public -j IN_public_log
-A IN_public -j IN_public_deny
-A IN_public -j IN_public_allow
-A IN_public -p icmp -j ACCEPT
-A IN_public_allow -p tcp -m tcp --dport 22 -m conntrack --ctstate NEW -j ACCEPT
COMMIT
# Completed on Thu Aug 22 11:59:36 2019
更新 II:
「動作する」FORWARDの最初のルールはACCEPTです。これにより、すべてのパケットを転送できます。他のルールには、DNATされたパケットを受け入れるルールがありますが、チェーンの後半にあります。したがって、これがなぜ起こるのかがわかれば、問題を解決できる可能性があります。作品...
iptables -I FORWARD -d 0.0.0.0/0 -j ACCEPT
firewall-cmd --permanent --zone=public --add-forward-port=port=222:proto=tcp:toport=22:toaddr=10.1.0.9
firewall-cmd --reload
...そしてなぜこれがない...
firewall-cmd --permanent --zone=public --direct --add-rule ipv4 filter FORWARD 0 -d 0.0.0.0/0 -j ACCEPT
firewall-cmd --permanent --zone=public --add-forward-port=port=222:proto=tcp:toport=22:toaddr=10.1.0.9
firewall-cmd --reload
答え1
本当の問題:
コマンド...
firewall-cmd --permanent --zone=public --direct --add-rule ipv4 filter FORWARD 0 -d 0.0.0.0/0 -j ACCEPT
firewall-cmd --permanent --zone=public --add-forward-port=port=222:proto=tcp:toport=22:toaddr=10.1.0.9
firewall-cmd --reload
...「UPDATE II」で説明されているように、firewalld (CentOS 7 で使用) と同様に動作します。
問題は KVM (libvirt) にあります。KVM は、「ネットワーク」を起動するときに、virbr0 が (おそらく、firewalld 経由で) ルールを挿入し、従来の方法によるポート転送の試行を (最初の一致の原則に従って) 防止しますfirewall-cmd
。KVM が挿入した (libvirt) ルールは、FORWARD と POSTROUTING の先頭にあり、通常の firewalld ルールセットの前にあります。netfilter は最初の一致の原則に従って動作するため、これらのルールは、
解決:
KVM (libvirt) によってファイアウォールに挿入されたルールによって生成される問題に対する解決策は、以下で説明するように、libvirt-hook-qemu と呼ばれるハック/回避策を使用することです...
libvirt-hook-qemu をダウンロードしてインストールします...
yum -y install git-core
cd /usr/local/src
git clone https://github.com/saschpe/libvirt-hook-qemu.git
cd libvirt-hook-qemu
make install
cd ..
rm -rf libvirt-hook-qemu
仮想マシン (ゲスト) を一覧表示します...
virsh list --all
...ターゲット仮想マシンの名前をコピーします。
仮想マシンをオフにします...
virsh shutdown "<VM_NAME>" --mode acpi
ファイル「hooks.json」を開き、その内容を削除します...
vi /etc/libvirt/hooks/hooks.json
...そして、以下のテンプレートに従ってルールを入力します (他の設定方法も可能です)...
{
"<VM_NAME>": {
"interface": "virbr0",
"private_ip": "<VM_IP>",
"port_map": {
"tcp": [[<PORT_ON_HOST>, <PORT_ON_GUEST>]]
}
}
}
libvirtd を再起動します...
systemctl restart libvirtd.service
...そして仮想マシンを起動します...
virsh start "<VM_NAME>"
完了!=D
さらに遠く:
この KVM (libvirt) の動作 (ポート転送の試行を阻止するルールを挿入する) は、強制的で、侵入的で、不必要です... 第一に、ホストにポート転送がないため、仮想マシンはデフォルト ネットワーク (virbr0) に到達できず、第二に、ハック/回避策 (またはブラジルで「gato」/「gambiarra」と呼ぶもの =D) の使用を強制するためです。
私たちの見解では、ユーザーにインフラストラクチャの構築方法を強制するのは意味がありません...これは意味がありません! 率直に言って、他の主要なハイパーバイザーと同様に、これらの設定がオプション (ルールを挿入するなど) であれば最適だと考えています。さらに、KVM (libvirt) でこのようなものを制御する場合は、ポートを仮想マシンにマップする方法も提供する必要があります。
KVM(libvirt)は素晴らしいツールですが、さまざまな理由から、すべてのユーザーがマシンをホスト マシンのネットワークに直接配置することに同意するわけではありません。同様に、すべてのユーザーが、デフォルト ネットワーク (virbr0) が提供する柔軟性とアクセス性をすべて放棄することに同意するわけではありません。
ありがとう!
[参照.:バグ報告、 参考:、 https://libvirt.org/formatnetwork.html#examplesルート、 https://saschpe.wordpress.com/2014/03/06/dynamic-iptables-port-forwarding-for-nat-ed-libvirt-networks/、 https://serverfault.com/q/170079/276753、 https://serverfault.com/q/915257/276753、 https://wiki.libvirt.org/page/VirtualNetworking#Routed_mode、 https://www.centos.org/forums/viewtopic.php?f=50&t=71454&sid=7f5190a29eebbf755235ec3dc404a47f、 https://www.cyberciti.biz/faq/kvm-forward-ports-to-guests-vm-with-ufw-on-linux/]
アップデート:
ポート転送の試みを阻止するルールを挿入する
-> KVM の現在のアップストリーム (libvirt) では、この問題が解決されています。
これを参照してください: ...KVMの現在のアップストリーム(libvirt)は問題を解決しました...