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Lab 1.1 Routing and DMZ (VYOS & LOG)

Mar 31, 2024, 3 min read

Lab 1.1: Routing and DMZ (VYOS/LOG)

Summary

During this lab we started to configure fw01, log01, rw01, web01.

VYOS

Version Control:

To change VYOS rules and save:

configure
<Enter Commands>
commit
save

hostname:

set system host-name <HOSTNAME>

interfaces:

Description:

set interfaces ethernet <ADAPTER> description <DESCRIPTION>

Set IP:

set interfaces ethernet <ADAPTER> address <IP ADDRESS>/<SUBNET>

gateway/route:

Command below will route all traffic to the gateway ip:

set protocols static route 0.0.0.0/0 next-hop <GATEWAY>

dns:

set system name-server <NAME SERVER IP>

nat:

set nat source rule 10 description <DESCRIPTION>
set nat source rule 10 outbound-interface <ADAPTER>
set nat source rule 10 source address <IP OR NETWORK>/<SUBNET>
set nat source rule 10 translation address masquerade

dns forwarding:

Below allows listening address to reslove requests from the allowed IP or Network

set service dns forwarding listen-address <LISTENING IP>
set service dns forwarding allow-from <IP OR NETWORK>/<SUBNET>
set service dns forwarding system

SYSLOG

Server

  • Install syslog
sudo yum install rsyslog
  • Allow 514 tcp and udp. Example below if for firewalld systems
firewall-cmd --permanent --zone=public --add-port=514/tcp
firewall-cmd --permanent --zone=public --add-port=514/udp
firewall-cmd --reload
  • Now configure the rsyslog.conf
sudo vi /etc/rsyslog.conf

  • Restart and enable rsyslog.service
sudo systemctl restart rsyslog.service
sudo systemctl enable rsyslog.service
  • Once you setup the client you will be able to see the client test with:
sudo tail -f /var/log/messages

Client

  • Install syslog
sudo yum install rsyslog
  • Allow 514 tcp and udp. Example below if for firewalld systems
firewall-cmd --permanent --zone=public --add-port=514/tcp
firewall-cmd --permanent --zone=public --add-port=514/udp
firewall-cmd --reload
  • Make/edit the file /etc/rsyslog.d/sec350.conf
sudo vi /etc/rsyslog.d/sec350.conf
  • Add the line
user.notice @<IP OF LOG Machine>
  • To test the logger:
logger -t test TESTTOLOG
  • Now do step 5 of server and it should show a message like this:

Notes

VYOS Config after this lab:

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 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 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 listen-address '172.16.50.2'
set service dns forwarding system
set service ssh listen-address '0.0.0.0'
set system host-name 'fw1-paul'
set system name-server '10.0.17.2'

VYOS Change User passwd:

https://support.vyos.io/en/kb/articles/set-change-the-password-of-a-user

set system login user vyos authentication plaintext-password

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