Thread: Firewall: How do completely prevent any traffic from network?

hi,
have ubuntu 8.04 virtual host. on host have installed virtualbox virtualization software. have installed windows xp virtual machine , installed http server.

temporally disable network connections host , virtual machine.
on ubuntu host have set firewall settings:

code:

sudo iptables -f  (to flush - delete firewall settings) sudo iptables -p input drop (to disable input traffic) sudo iptables -p forward drop (to disable forward traffic) sudo iptables -p output drop (to disable output traffic

list firewall settings:

code:

sudo iptables -l -n -v

outputs:

code:

chain input (policy drop 0 packets, 0 bytes)  pkts bytes target     prot opt in     out     source               destination           chain forward (policy drop 0 packets, 0 bytes)  pkts bytes target     prot opt in     out     source               destination           chain output (policy drop 0 packets, 0 bytes)  pkts bytes target     prot opt in     out     source               destination

i see can't connect internet ubuntu host, sample "sudo apt-get update" returns error.

can still connect http server witch running in virtual machine. strange. why isn't traffic prevented? should prevent of traffic virtual machine , host?

have 2 network adapters (ifconfig command): lo (local) , eth0 (ethernet). virtualbox using eth0 communicate internet.

p.s. there no other firewall installed on ubuntu ufw.
regards

moved security discussions , bumped

Forum The Ubuntu Forum Community Ubuntu Specialised Support Security [ubuntu] Firewall: How do completely prevent any traffic from network?

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