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nouveau fichier : siotp/sisr1/TP7/scriptsnft/current_ruleset.nft

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nouveau fichier : siotp/sisr1/TP7/scriptsnft/fw_part1.nft
	nouveau fichier : siotp/sisr1/TP7/scriptsnft/fw_part2.nft
	nouveau fichier : siotp/sisr1/TP7/scriptsnft/fw_part3.nft
	nouveau fichier : siotp/sisr1/TP7/scriptsnft/refresh_firewall.sh
This commit is contained in:
Jarod Pauchet 2024-04-04 14:25:22 +02:00
parent 0240b7d77a
commit 97c5a05efa
5 changed files with 168 additions and 0 deletions
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68
siotp/sisr1/TP7/scriptsnft/current_ruleset.nft Normal file
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define netif = enp0s3
define dmzif = enp0s8
define lanif = enp0s9
define firewall = 192.168.0.140
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 {$iplan} accept
tcp dport 20 accept
tcp dport 21 accept
tcp dport {80, 443} accept
tcp dport 22 accept
ip saddr 10.121.38.1 tcp dport {80, 443} accept
}
chain system_in {
type filter hook input priority filter; policy drop;
icmp type echo-reply accept
icmp type echo-request iif {$lanif} accept
ct state established, related accept
tcp dport 20 accept
tcp dport 21 accept
tcp dport {80, 443} accept
tcp dport 22 accept
ip saddr 10.121.38.1 tcp dport {80, 443} 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;
ip daddr 10.121.38.7-10.121.38.8 accept
ip daddr 10.121.38.1 tcp dport 8080 accept
icmp type echo-reply oif {$lanif} accept
icmp type echo-request accept
tcp dport 20 accept
tcp sport 20 accept
tcp dport 21 accept
tcp sport 21 accept
tcp dport {80, 443} accept
tcp sport {80, 443} accept
tcp sport 22 accept
}
chain postrouting {
type filter hook postrouting priority filter; policy drop;
ip daddr 10.121.38.7-10.121.38.8 accept
ip daddr 10.121.38.1 tcp dport 8080 accept
icmp type echo-request ip saddr {$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 dport 20 accept
tcp sport 20 accept
tcp dport 21 accept
tcp sport 21 accept
tcp dport {80, 443} accept
tcp sport {80, 443} accept
tcp sport 22 accept
}
}

18
siotp/sisr1/TP7/scriptsnft/fw_part1.nft Normal file
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define netif = enp0s3
define dmzif = enp0s8
define lanif = enp0s9
table ip ipfilter {
chain routing {
type filter hook forward priority filter; policy accept;
icmp type echo-request iif { "$netif", "$dmzif" } drop
icmp type { echo-reply, echo-request } accept
drop
}
chain system_in {
type filter hook input priority filter; policy accept;
icmp type echo-request iif { "$netif", "$dmzif" } drop
}
}

34
siotp/sisr1/TP7/scriptsnft/fw_part2.nft Normal file
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define netif = enp0s3
define dmzif = enp0s8
define lanif = enp0s9
table ip ipfilter {
chain prerouting {
type filter hook prerouting priority filter; policy drop;
tcp dport 22 accept
}
chain routing {
type filter hook forward priority filter; policy drop;
icmp type echo-request iif { $netif, $dmzif } drop
icmp type { echo-reply, echo-request } accept
}
chain system_in {
type filter hook input priority filter; policy drop;
icmp type echo-request iif { $netif, $dmzif } drop
tcp dport 22 accept
}
chain system_out {
type filter hook output priority filter; policy drop;
tcp sport 22 accept
}
chain postrouting {
type filter hook postrouting priority filter; policy drop;
tcp sport 22 accept
}
}

41
siotp/sisr1/TP7/scriptsnft/fw_part3.nft Normal file
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define netif = enp0s3
define dmzif = enp0s8
define lanif = enp0s9
define netip = 192.168.0.140
define dmzip = 172.16.0.254
define lanip = 10.0.0.254
table ip ipfilter{
chain prerouting {
type filter hook prerouting priority filter; policy drop;
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 $lanip accept
icmp type echo-reply accept
tcp dport 22 accept
}
chain system_in {
type filter hook input priority filter; policy drop;
icmp type echo-request iif $lanif accept
icmp type echo-reply 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-request accept
icmp type echo-reply oif $lanif accept
tcp sport 22 accept
}
chain postrouting {
type filter hook postrouting priority filter; policy drop;
icmp type echo-request ip saddr {$lanip , $dmzip , $netip } accept
icmp type echo-request iif $lanif oif $dmzif accept
icmp type echo-reply iif $dmzif oif $lanif accept
icmp type echo-reply ip saddr $lanip oif $lanif accept
tcp sport 22 accept
}
}

7
siotp/sisr1/TP7/scriptsnft/refresh_firewall.sh Normal file
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#!/bin/bash
# active le routage entre les interfaces réseau du firewall
echo "1" > /proc/sys/net/ipv4/ip_forward
#vide les règles actuelles du pare-feu
nft flush ruleset
#charge les règles du pare-feu présentes dans le fichier
nft -f /root/scriptsnft/current_ruleset.nft