From 2aac7249eaa6956b9bdb8319446972c74d0b94dd Mon Sep 17 00:00:00 2001 From: tmferreira-ti <163651394+tmferreira-ti@users.noreply.github.com> Date: Fri, 12 Sep 2025 09:12:54 -0300 Subject: [PATCH] . --- Gerente/interfaces | 14 +++++++++ Router/interfaces | 24 ++++++++++++++++ Router/nftables.conf | 13 +++++++++ Router/sysctl.conf | 68 ++++++++++++++++++++++++++++++++++++++++++++ Server1/interfaces | 14 +++++++++ Server2/interfaces | 13 +++++++++ 6 files changed, 146 insertions(+) create mode 100644 Gerente/interfaces create mode 100644 Router/interfaces create mode 100644 Router/nftables.conf create mode 100644 Router/sysctl.conf create mode 100644 Server1/interfaces create mode 100644 Server2/interfaces diff --git a/Gerente/interfaces b/Gerente/interfaces new file mode 100644 index 0000000..8c4a37b --- /dev/null +++ b/Gerente/interfaces @@ -0,0 +1,14 @@ +# This file describes the network interfaces available on your system +# and how to activate them. For more information, see interfaces(5). + +source /etc/network/interfaces.d/* + +# The loopback network interface +auto lo +iface lo inet loopback + +# The primary network interface +auto enp0s3 +iface enp0s3 inet static + address 192.168.200.3/24 + gateway 192.168.200.1 diff --git a/Router/interfaces b/Router/interfaces new file mode 100644 index 0000000..8d6a2a0 --- /dev/null +++ b/Router/interfaces @@ -0,0 +1,24 @@ +# This file describes the network interfaces available on your system +# and how to activate them. For more information, see interfaces(5). + +source /etc/network/interfaces.d/* + +# The loopback network interface +auto lo +iface lo inet loopback + +auto enp0s3 +iface enp0s3 inet dhcp + +auto enp0s8 +iface enp0s8 inet static + address 172.17.0.1 + netmask 255.255.255.0 + +auto enp0s9 +iface enp0s9 inet static + address 192.168.200.1/24 + +auto enp0s10 +iface enp0s10 inet static + address 192.168.56.200/24 diff --git a/Router/nftables.conf b/Router/nftables.conf new file mode 100644 index 0000000..ee7bc08 --- /dev/null +++ b/Router/nftables.conf @@ -0,0 +1,13 @@ +table ip nat { + chain POSTROUTING { + type nat hook postrouting priority srcnat; policy accept; + oifname "enp0s3" counter packets 71 bytes 4910 masquerade + } + + chain PREROUTING { + type nat hook prerouting priority dstnat; policy accept; + tcp dport 10001 counter packets 0 bytes 0 dnat to 192.168.200.3:22 + tcp dport 10000 counter packets 0 bytes 0 dnat to 172.17.0.2:22 + tcp dport 10002 counter packets 0 bytes 0 dnat to 192.168.200.2:22 + } +} diff --git a/Router/sysctl.conf b/Router/sysctl.conf new file mode 100644 index 0000000..1fa03b9 --- /dev/null +++ b/Router/sysctl.conf @@ -0,0 +1,68 @@ +# +# /etc/sysctl.conf - Configuration file for setting system variables +# See /etc/sysctl.d/ for additional system variables. +# See sysctl.conf (5) for information. +# + +#kernel.domainname = example.com + +# Uncomment the following to stop low-level messages on console +#kernel.printk = 3 4 1 3 + +################################################################### +# Functions previously found in netbase +# + +# Uncomment the next two lines to enable Spoof protection (reverse-path filter) +# Turn on Source Address Verification in all interfaces to +# prevent some spoofing attacks +#net.ipv4.conf.default.rp_filter=1 +#net.ipv4.conf.all.rp_filter=1 + +# Uncomment the next line to enable TCP/IP SYN cookies +# See http://lwn.net/Articles/277146/ +# Note: This may impact IPv6 TCP sessions too +#net.ipv4.tcp_syncookies=1 + +# Uncomment the next line to enable packet forwarding for IPv4 +net.ipv4.ip_forward=1 + +# Uncomment the next line to enable packet forwarding for IPv6 +# Enabling this option disables Stateless Address Autoconfiguration +# based on Router Advertisements for this host +#net.ipv6.conf.all.forwarding=1 + + +################################################################### +# Additional settings - these settings can improve the network +# security of the host and prevent against some network attacks +# including spoofing attacks and man in the middle attacks through +# redirection. Some network environments, however, require that these +# settings are disabled so review and enable them as needed. +# +# Do not accept ICMP redirects (prevent MITM attacks) +#net.ipv4.conf.all.accept_redirects = 0 +#net.ipv6.conf.all.accept_redirects = 0 +# _or_ +# Accept ICMP redirects only for gateways listed in our default +# gateway list (enabled by default) +# net.ipv4.conf.all.secure_redirects = 1 +# +# Do not send ICMP redirects (we are not a router) +#net.ipv4.conf.all.send_redirects = 0 +# +# Do not accept IP source route packets (we are not a router) +#net.ipv4.conf.all.accept_source_route = 0 +#net.ipv6.conf.all.accept_source_route = 0 +# +# Log Martian Packets +#net.ipv4.conf.all.log_martians = 1 +# + +################################################################### +# Magic system request Key +# 0=disable, 1=enable all, >1 bitmask of sysrq functions +# See https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html +# for what other values do +#kernel.sysrq=438 + diff --git a/Server1/interfaces b/Server1/interfaces new file mode 100644 index 0000000..ed56dbc --- /dev/null +++ b/Server1/interfaces @@ -0,0 +1,14 @@ +# This file describes the network interfaces available on your system +# and how to activate them. For more information, see interfaces(5). + +source /etc/network/interfaces.d/* + +# The loopback network interface +auto lo +iface lo inet loopback + +# The primary network interface +auto enp0s3 +iface enp0s3 inet static + address 192.168.200.2/24 + gateway 192.168.200.1 diff --git a/Server2/interfaces b/Server2/interfaces new file mode 100644 index 0000000..6eae275 --- /dev/null +++ b/Server2/interfaces @@ -0,0 +1,13 @@ +# This file describes the network interfaces available on your system +# and how to activate them. For more information, see interfaces(5). + +source /etc/network/interfaces.d/* + +# The loopback network interface +auto lo +iface lo inet loopback + +auto enp0s3 +iface enp0s3 inet static + address 172.17.0.2/24 + gateway 172.17.0.1