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Ajout des configs du firewall jusqu'à l'étape 6

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yann.lereuille 2025-04-17 14:56:53 +02:00
parent 8240fd27ab
commit ef975eb469
4 changed files with 252 additions and 1 deletions
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75
sisr1/tp06-firewall/current_ruleset.nft
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@ -8,35 +8,108 @@ define dmzip = 172.17.0.254
define lan-ntw = 172.16.0.1-172.16.0.254
define dmz-ntw = 172.17.0.1-172.17.0.254
define internal-dns-ip = 172.16.0.2
define dns-forwarder-ip = 10.121.38.7
table ip ipfilter{
#Chaines de filtrage
chain prerouting {
type filter hook prerouting priority filter; policy drop;
#Communication déjà établies
ct state established,related accept
#SSH
tcp dport 22 accept
#Requêtes HTTP/HTTPS depuis LAN
tcp dport {80,443} iif $lanif accept
#Requêtes externe du serveur DNS
ip saddr $internal-dns-ip ip daddr $dns-forwarder-ip accept
#Pings
icmp type echo-request iif $lanif accept
icmp type echo-reply iif {$lanif, $dmzif} accept
#Requêtes DNS depuis DMZ
ip saddr $dmz-ntw ip daddr $internal-dns-ip accept
}
chain system_in {
type filter hook input priority filter; policy drop;
#Communication déjà établies
ct state established,related accept
#SSH
tcp dport 22 accept
#Pings
icmp type echo-request iif $lanif accept
icmp type echo-reply accept
#Requêtes DNS depuis DMZ
udp dport 53 accept
tcp dport 53 accept
}
chain routing {
type filter hook forward priority filter; policy drop;
#Communication déjà établies
ct state established,related accept
#Requêtes HTTP/HTTPS depuis LAN
tcp dport {80,443} iif $lanif accept
#Requêtes externe du serveur DNS
ip saddr $internal-dns-ip ip daddr $dns-forwarder-ip accept
#Pings
icmp type echo-request iif $lanif oif $dmzif accept
icmp type echo-reply iif $dmzif oif $lanif accept
#Requêtes DNS depuis DMZ
ip saddr $dmz-ntw ip daddr $internal-dns-ip accept
}
chain system_out {
type filter hook output priority filter; policy drop;
#Communication déjà établies
ct state established,related accept
#SSH
tcp sport 22 accept
#Proxy lycée
tcp dport 8080 accept
#DNS
udp dport 53 accept
#HTTP/HTTPS
tcp dport {80,443} accept
#FTP
tcp dport {20,21} accept
#Pings
icmp type echo-request accept
icmp type echo-reply oif $lanif accept
}
chain postrouting {
type filter hook postrouting priority filter; policy drop;
#Communication déjà établies
ct state established,related accept
#SSH
tcp sport 22 accept
#Proxy lycée
tcp dport 8080 accept
#DNS
udp dport 53 accept
#HTTP/HTTPS
tcp dport {80,443} accept
#FTP
tcp dport {20,21} accept
#Requêtes externe du serveur DNS
ip saddr $internal-dns-ip ip daddr $dns-forwarder-ip accept
#Pings
icmp type echo-request oif {$lanif, $dmzif} accept
icmp type echo-reply oif $lanif accept
#Requêtes DNS depuis DMZ
ip saddr $dmz-ntw ip daddr $internal-dns-ip accept
}
#Chaines pour la NAT
chain nat_prerouting {
type nat hook prerouting priority filter; policy accept;
}
chain nat_postrouting {
type nat hook postrouting priority filter; policy accept;
#Masquage des IP de la LAN sortant sur Internet
ip saddr $lan-ntw oif $netif snat $netip
}
}

54
sisr1/tp06-firewall/fw_part4.nft Normal file
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@ -0,0 +1,54 @@
define netif = enp0s3
define lanif = enp0s8
define dmzif = enp0s9
define netip = 192.168.0.130
define lanip = 172.16.0.254
define dmzip = 172.17.0.254
define lan-ntw = 172.16.0.1-172.16.0.254
define dmz-ntw = 172.17.0.1-172.17.0.254
table ip ipfilter {
chain prerouting {
type filter hook prerouting priority filter; policy drop;
ct state established,related accept
tcp dport 22 accept
icmp type echo-request iif $lanif accept
icmp type echo-reply iif {$lanif, $dmzif} accept
}
chain system_in {
type filter hook input priority filter; policy drop;
ct state established,related accept
tcp dport 22 accept
icmp type echo-request iif $lanif accept
icmp type echo-reply accept
udp sport 53 accept # Ajout pour les réponses DNS
}
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
udp sport 53 accept # Ajout pour les réponses DNS
}
chain system_out {
type filter hook output priority filter; policy drop;
tcp sport 22 accept
udp dport 53 accept
tcp dport {80, 443} accept
tcp dport {20, 21} accept
tcp dport 8080 accept
icmp type echo-request accept
icmp type echo-reply oif $lanif accept
}
chain postrouting {
type filter hook postrouting priority filter; policy drop;
tcp sport 22 accept
udp dport 53 accept
tcp sport {80, 443} accept
tcp sport {20, 21} accept
tcp dport 8080 accept
icmp type echo-request oif {$lanif, $dmzif} accept
icmp type echo-reply oif $lanif accept
}
}

106
sisr1/tp06-firewall/fw_part5.nft Normal file
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@ -0,0 +1,106 @@
define netif = enp0s3
define lanif = enp0s8
define dmzif = enp0s9
define netip = 192.168.0.130
define lanip = 172.16.0.254
define dmzip = 172.17.0.254
define lan-ntw = 172.16.0.1-172.16.0.254
define dmz-ntw = 172.17.0.1-172.17.0.254
define internal-dns-ip = 172.16.0.2
define dns-forwarder-ip = 10.121.38.7
table ip ipfilter{
#Chaines de filtrage
chain prerouting {
type filter hook prerouting priority filter; policy drop;
#Communication déjà établies
ct state established,related accept
#SSH
tcp dport 22 accept
#Requêtes HTTP/HTTPS depuis LAN
tcp dport {80,443} iif $lanif accept
#Requêtes externe du serveur DNS
ip saddr $internal-dns-ip ip daddr $dns-forwarder-ip accept
#Pings
icmp type echo-request iif $lanif accept
icmp type echo-reply iif {$lanif, $dmzif} accept
}
chain system_in {
type filter hook input priority filter; policy drop;
#Communication déjà établies
ct state established,related accept
#SSH
tcp dport 22 accept
#Pings
icmp type echo-request iif $lanif accept
icmp type echo-reply accept
}
chain routing {
type filter hook forward priority filter; policy drop;
#Communication déjà établies
ct state established,related accept
#Requêtes HTTP/HTTPS depuis LAN
tcp dport {80,443} iif $lanif accept
#Requêtes externe du serveur DNS
ip saddr $internal-dns-ip ip daddr $dns-forwarder-ip accept
#Pings
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;
#Communication déjà établies
ct state established,related accept
#SSH
tcp sport 22 accept
#Proxy lycée
tcp dport 8080 accept
#DNS
udp dport 53 accept
#HTTP/HTTPS
tcp dport {80,443} accept
#FTP
tcp dport {20,21} accept
#Pings
icmp type echo-request accept
icmp type echo-reply oif $lanif accept
}
chain postrouting {
type filter hook postrouting priority filter; policy drop;
#Communication déjà établies
ct state established,related accept
#SSH
tcp sport 22 accept
#Proxy lycée
tcp dport 8080 accept
#DNS
udp dport 53 accept
#HTTP/HTTPS
tcp dport {80,443} accept
#FTP
tcp dport {20,21} accept
#Requêtes externe du serveur DNS
ip saddr $internal-dns-ip ip daddr $dns-forwarder-ip accept
#Pings
icmp type echo-request oif {$lanif, $dmzif} accept
icmp type echo-reply oif $lanif accept
}
#Chaines pour la NAT
chain nat_prerouting {
type nat hook prerouting priority filter; policy accept;
}
chain nat_postrouting {
type nat hook postrouting priority filter; policy accept;
#Masquage des IP de la LAN sortant sur Internet
ip saddr $lan-ntw oif $netif snat $netip
}
}

18
sisr1/tp06-firewall/gitpush.sh Normal file
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@ -0,0 +1,18 @@
#!/bin/bash
# Permet de vérifier si un message a été passé en argument
if [ -z "$1" ]; then
read -p "Erreur : Entrez un message : " $message
else
message=$1
fi
# Ajout des fichiers modifiés
git add .
# Commit avec le message
git commit -m "$message"
# Push vers le dépôt Gitea
git push -u https://yann.lereuille@gitea.lyc-lecastel.fr/yann.lereuille/siotp.git