.

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

Router/interfaces

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+# 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

Router/nftables.conf

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+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
+	}
+}

Router/sysctl.conf

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+#
+# /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
+

Server1/interfaces

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+# 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

Server2/interfaces

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+# 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