From e93fb79d9d829ad537f3badc46f6b4d1c2700fa3 Mon Sep 17 00:00:00 2001
From: Guillaume Emorine <guillaume.emorine@debian>
Date: Thu, 4 Apr 2024 11:38:23 +0200
Subject: [PATCH] =?UTF-8?q?=09Nouveau=20fichier=C2=A0:=20sisr1/tp07/files?=
 =?UTF-8?q?=5Ffirewall/current=5Fruleset=5Fpartie=5F4.nft?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../current_ruleset_partie_4.nft              | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 sisr1/tp07/files_firewall/current_ruleset_partie_4.nft

diff --git a/sisr1/tp07/files_firewall/current_ruleset_partie_4.nft b/sisr1/tp07/files_firewall/current_ruleset_partie_4.nft
new file mode 100644
index 0000000..d64347f
--- /dev/null
+++ b/sisr1/tp07/files_firewall/current_ruleset_partie_4.nft
@@ -0,0 +1,46 @@
+define netif = enp0s3
+define dmzif = enp0s8
+define lanif = enp0s9
+
+define firewall = 192.168.0.120
+define ipdmz = 172.16.0.254
+define iplan = 10.0.0.254
+
+table ip ipfilter{
+	chain prerouting {
+                type filter hook prerouting priority filter; policy drop;
+		icmp type echo-reply accept
+		ct state established, related accept
+		icmp type echo-request iif {$lanif} ip daddr 172.16.0.1-172.16.0.254 accept
+		icmp type echo-request iif {$lanif} ip daddr {$iplan} accept
+		tcp dport 22 accept
+        }
+	chain system_in {
+                type filter hook input priority filter; policy drop;
+		icmp type echo-reply accept
+		icmp type echo-request iif {$lanif} accept
+		ct state established, related accept
+                tcp dport 22 accept
+        }
+ 	chain routing {
+                type filter hook forward priority filter; policy drop;
+        	icmp type echo-request iif {$lanif} oif {$dmzif} accept
+		icmp type echo-reply iif {$dmzif} oif {$lanif} accept
+	}
+ 	chain system_out {
+                type filter hook output priority filter; policy drop;
+		icmp type echo-reply oif {$lanif} accept
+		icmp type echo-request accept
+		ip daddr 10.121.38.7-10.121.38.8 accept
+		tcp sport 22 accept
+        }
+	chain postrouting {
+                type filter hook postrouting priority filter; policy drop;
+		ip daddr 10.121.38.7-10.121.38.8 accept
+		icmp type echo-request ip saddr {$iplan, $ipdmz, $firewall} accept
+		icmp type echo-reply iif {$dmzif}  oif {$lanif} accept
+		icmp type echo-request iif {$lanif} oif {$dmzif} accept
+		icmp type echo-request ip saddr $iplan oif $lanif accept
+		tcp sport 22 accept
+        }
+}