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🔬Find the Secret Server

The Kali OS GUI instance is web hosted on the INE website, where:

  • 10.175.34.0/24 - is the network the Kali instance is connected to.

  • 172.16.88.81 - Company web server inside network 172.16.88.0/24.

  • 192.168.222.199 - Secret web server inside network 192.168.222.0/24.

  • 192.168.241.12 - Test web server inside network 192.168.241.0/24.

Objective: Configure the routes on the Kali machine to reach all the hosts in the networks.

SOLUTION

  • Check Kali instance current routes and Kali's IP address:

    • route

    • ip -br -c a

    └─# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         10.1.0.1        0.0.0.0         UG    0      0        0 adlab0
10.1.0.0        0.0.0.0         255.255.255.0   U     0      0        0 adlab0
10.175.34.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
172.16.88.0     10.175.34.1     255.255.255.0   UG    0      0        0 eth1
192.168.241.0   10.175.34.1     255.255.255.0   UG    0      0        0 eth1
└─# ip -br -c a
lo               UNKNOWN        127.0.0.1/8 ::1/128 
adlab0           UP             10.1.0.5/24 fe80::a00:27ff:fef9:76b6/64 
eth1             UP             10.175.34.140/24 fe80::a00:27ff:fed4:ee5d/64 
eth2             UP

    • 10.175.34.1 is the default gateway to reach other networks outside the 10.175.34.0/24 network.

    • The last 2 routes are used for communications to the Company and Test web servers, reachable via HTTP.

    • Tried ping and access the secret webserver at http://192.168.222.199, with no response:

    └─# ping 192.168.222.199
PING 192.168.222.199 (192.168.222.199) 56(84) bytes of data.
From 10.1.0.5 icmp_seq=1 Destination Host Unreachable
From 10.1.0.5 icmp_seq=2 Destination Host Unreachable
^C
--- 192.168.222.199 ping statistics ---
7 packets transmitted, 0 received, +7 errors, 100% packet loss, time 7151ms
pipe 4

  • Secret server is not accessible at 192.168.222.199. Manually add one more route in order to access its network 192.168.222.0/24 through Kali's gateway 10.175.34.1.

    • ip route help - ip route command help

    • ip route add 192.168.222.0/24 via 10.175.34.1 dev eth1

    • route - check current routes

    • ping 192.168.222.199 - check pinging the web server, should be working (not necessary, ICMP protocol)

    └─# ip route
default via 10.1.0.1 dev adlab0 onlink 
10.1.0.0/24 dev adlab0 proto kernel scope link src 10.1.0.5 
10.175.34.0/24 dev eth1 proto kernel scope link src 10.175.34.140 
172.16.88.0/24 via 10.175.34.1 dev eth1 
192.168.241.0/24 via 10.175.34.1 dev eth1 

└─# ip route add 192.168.222.0/24 via 10.175.34.1 dev eth1

└─# route           
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         10.1.0.1        0.0.0.0         UG    0      0        0 adlab0
10.1.0.0        0.0.0.0         255.255.255.0   U     0      0        0 adlab0
10.175.34.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
172.16.88.0     10.175.34.1     255.255.255.0   UG    0      0        0 eth1
192.168.222.0   10.175.34.1     255.255.255.0   UG    0      0        0 eth1
192.168.241.0   10.175.34.1     255.255.255.0   UG    0      0        0 eth1

└─# ping 192.168.222.199                                  
PING 192.168.222.199 (192.168.222.199) 56(84) bytes of data.
64 bytes from 192.168.222.199: icmp_seq=1 ttl=63 time=1.70 ms
64 bytes from 192.168.222.199: icmp_seq=2 ttl=63 time=0.857 ms

  • After the route was successfully added, navigate to http://192.168.222.199 in the web browser:

📍 Lab solved!

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