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Lab 6.1 Port Forwarding and Jump Boxes

Mar 31, 2024, 6 min read

Lab 6.1: Port Forwarding and Jump Boxes

Summary:

During this lab we setup our jumpbox and configured port forwarding. The main hichup I had was getthing the proper command for the jump user. Everything else was pretty smooth sailing.

RW01:

Configuring Default Routes: (RW01)

sudo ip route delete 172.16.50.0/29

After delete:

Making SSH Key w/ Comment: (RW01)

Move keys to /home/paul/keys

FW01:

Web Server:

set nat destination rule 10 destination port 80
set nat destination rule 10 inbound-interface eth0
set nat destination rule 10 protocol tcp
set nat destination rule 10 translation address 172.16.50.3
set nat destination rule 10 translation port 80
set nat destination rule 10 description HTTP->WEB01

SSH Listen Address:

set service ssh listen-address 172.16.150.2
del service ssh listen-address 0.0.0.0

SSH for WAN to JUMP:

set nat destination rule 20 destination port 22
set nat destination rule 20 inbound-interface eth0
set nat destination rule 20 protocol tcp
set nat destination rule 20 translation address 172.16.50.4
set nat destination rule 20 translation port 22
set nat destination rule 20 description WAN->JUMP

SSH Edit WAN-to-DMZ

set firewall name WAN-to-DMZ rule 20 action 'accept'
set firewall name WAN-to-DMZ rule 20 description 'Allow SSH from WAN to DMZ'
set firewall name WAN-to-DMZ rule 20 destination address '172.16.50.4'
set firewall name WAN-to-DMZ rule 20 destination port 22
set firewall name WAN-to-DMZ rule 20 protocol 'tcp'

Jump:

Base Setup:

sudo nano /etc/hostname

make: jump-paul

sudo nano /etc/netplan/00-installer-config.yaml

To Enable and Apply netplan:

sudo netplan try

Create paul user:

Sudo adduser paul
Sudo usermod -aG sudo paul
Sudo reboot

Login with paul and delete champuser:

sudo deluser champuser

Make jump user:

sudo useradd -mk /etc/skel -s /bin/bash -d /home/paul-jump paul-jump
Sudo -i
Cd /home/paul-jump
Mkdir .ssh

Copy pub key from rw01 to jump

mgmt01:

sftp paul@10.0.17.27:/home/paul/keys/jump-paul.pub jump-paul.pub
scp ./jump-paul.pub paul@172.16.50.4:

Jump:

sudo -i
cd /home/paul/
cat jump-paul.pub > /home/paul-jump/.ssh/authorized_keys
chown paul-jump:paul-jump -R /home/paul-jump/.ssh/

Add Wazuh Agent to jump:

mgmt01:

curl -so wazuh-agent-4.3.10.deb https://packages.wazuh.com/4.x/apt/pool/main/w/wazuh-agent/wazuh-agent_4.3.10-1_amd64.deb 
Scp wazuh-agent-4.3.10.deb paul@172.16.50.4:

jump:

sudo WAZUH_MANAGER='172.16.200.10' WAZUH_AGENT_GROUP='linux' dpkg -i ./wazuh-agent-4.3.10.deb
sudo systemctl daemon-reload
sudo systemctl enable wazuh-agent
sudo systemctl start wazuh-agent

Vyos Configs

FW1

set firewall name DMZ-to-LAN default-action 'drop'
set firewall name DMZ-to-LAN enable-default-log
set firewall name DMZ-to-LAN rule 1 action 'accept'
set firewall name DMZ-to-LAN rule 1 state established 'enable'
set firewall name DMZ-to-LAN rule 10 action 'accept'
set firewall name DMZ-to-LAN rule 10 description 'wazuh agent communications with wazuh server'
set firewall name DMZ-to-LAN rule 10 destination address '172.16.200.10'
set firewall name DMZ-to-LAN rule 10 destination port '1514-1515'
set firewall name DMZ-to-LAN rule 10 protocol 'tcp'
set firewall name DMZ-to-WAN default-action 'drop'
set firewall name DMZ-to-WAN enable-default-log
set firewall name DMZ-to-WAN rule 1 action 'accept'
set firewall name DMZ-to-WAN rule 1 state established 'enable'
set firewall name DMZ-to-WAN rule 999 action 'accept'
set firewall name DMZ-to-WAN rule 999 source address '172.16.50.3'
set firewall name LAN-to-DMZ default-action 'drop'
set firewall name LAN-to-DMZ enable-default-log
set firewall name LAN-to-DMZ rule 1 action 'accept'
set firewall name LAN-to-DMZ rule 1 state established 'enable'
set firewall name LAN-to-DMZ rule 10 action 'accept'
set firewall name LAN-to-DMZ rule 10 description 'Allow HTTP from LAN to web01'
set firewall name LAN-to-DMZ rule 10 destination address '172.16.50.3'
set firewall name LAN-to-DMZ rule 10 destination port '80'
set firewall name LAN-to-DMZ rule 10 protocol 'tcp'
set firewall name LAN-to-DMZ rule 20 action 'accept'
set firewall name LAN-to-DMZ rule 20 description 'ssh from mgmt01 to DMZ'
set firewall name LAN-to-DMZ rule 20 destination address '172.16.50.0/29'
set firewall name LAN-to-DMZ rule 20 destination port '22'
set firewall name LAN-to-DMZ rule 20 protocol 'tcp'
set firewall name LAN-to-DMZ rule 20 source address '172.16.150.10'
set firewall name LAN-to-WAN default-action 'drop'
set firewall name LAN-to-WAN enable-default-log
set firewall name LAN-to-WAN rule 1 action 'accept'
set firewall name WAN-to-DMZ default-action 'drop'
set firewall name WAN-to-DMZ enable-default-log
set firewall name WAN-to-DMZ rule 1 action 'accept'
set firewall name WAN-to-DMZ rule 1 state established 'enable'
set firewall name WAN-to-DMZ rule 10 action 'accept'
set firewall name WAN-to-DMZ rule 10 description 'Allow HTTP from WAN to DMZ'
set firewall name WAN-to-DMZ rule 10 destination address '172.16.50.3'
set firewall name WAN-to-DMZ rule 10 destination port '80'
set firewall name WAN-to-DMZ rule 10 protocol 'tcp'
set firewall name WAN-to-DMZ rule 20 action 'accept'
set firewall name WAN-to-DMZ rule 20 description 'Allow SSH from WAN to DMZ'
set firewall name WAN-to-DMZ rule 20 destination address '172.16.50.4'
set firewall name WAN-to-DMZ rule 20 destination port '22'
set firewall name WAN-to-DMZ rule 20 protocol 'tcp'
set firewall name WAN-to-LAN default-action 'drop'
set firewall name WAN-to-LAN enable-default-log
set firewall name WAN-to-LAN rule 1 action 'accept'
set firewall name WAN-to-LAN rule 1 state established 'enable'
set interfaces ethernet eth0 address '10.0.17.127/24'
set interfaces ethernet eth0 description 'SEC350-WAN'
set interfaces ethernet eth1 address '172.16.50.2/29'
set interfaces ethernet eth1 description 'PAUL-DMZ'
set interfaces ethernet eth2 address '172.16.150.2/24'
set interfaces ethernet eth2 description 'PAUL-LAN'
set nat destination rule 10 description 'HTTP->WEB01'
set nat destination rule 10 destination port '80'
set nat destination rule 10 inbound-interface 'eth0'
set nat destination rule 10 protocol 'tcp'
set nat destination rule 10 translation address '172.16.50.3'
set nat destination rule 10 translation port '80'
set nat destination rule 20 description 'WAN->JUMP'
set nat destination rule 20 destination port '22'
set nat destination rule 20 inbound-interface 'eth0'
set nat destination rule 20 protocol 'tcp'
set nat destination rule 20 translation address '172.16.50.4'
set nat destination rule 20 translation port '22'
set nat source rule 10 description 'NAT FROM DMZ to WAN'
set nat source rule 10 outbound-interface 'eth0'
set nat source rule 10 source address '172.16.50.0/29'
set nat source rule 10 translation address 'masquerade'
set nat source rule 20 description 'NAT FROM LAN to WAN'
set nat source rule 20 outbound-interface 'eth0'
set nat source rule 20 source address '172.16.150.0/24'
set nat source rule 20 translation address 'masquerade'
set nat source rule 30 description 'NAT FROM MGMT to WAN'
set nat source rule 30 outbound-interface 'eth0'
set nat source rule 30 source address '172.16.200.0/28'
set nat source rule 30 translation address 'masquerade'
set protocols rip interface eth2
set protocols rip network '172.16.50.0/29'
set protocols static route 0.0.0.0/0 next-hop 10.0.17.2
set service dns forwarding allow-from '172.16.50.0/29'
set service dns forwarding allow-from '172.16.150.0/24'
set service dns forwarding listen-address '172.16.50.2'
set service dns forwarding listen-address '172.16.150.2'
set service dns forwarding system
set service ssh listen-address '172.16.150.2'
set system host-name 'fw1-paul'
set system name-server '10.0.17.2'
set zone-policy zone DMZ from LAN firewall name 'LAN-to-DMZ'
set zone-policy zone DMZ from WAN firewall name 'WAN-to-DMZ'
set zone-policy zone DMZ interface 'eth1'
set zone-policy zone LAN from DMZ firewall name 'DMZ-to-LAN'
set zone-policy zone LAN from WAN firewall name 'WAN-to-LAN'
set zone-policy zone LAN interface 'eth2'
set zone-policy zone WAN from DMZ firewall name 'DMZ-to-WAN'
set zone-policy zone WAN from LAN firewall name 'LAN-to-WAN'
set zone-policy zone WAN interface 'eth0'

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