Loading ...Linux Iptables block all network traffic
You would like to block all network traffic using iptables firewall under Debian GNU/Linux. This will block all incoming and outgoing traffic including Internet aka ADSL/ppp0 and it is highly recommend. The logic is block everything and allow only required traffic. This can be done with four simple commands:
# iptable -F # iptables -P INPUT DROP # iptables -P OUTPUT DROP # iptables -P FORWARD DROP
Please do not enter above command over remote ssh login session.
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Tags: block traffic, gnu linux, iptable, iptables firewall, network traffic, outgoing traffic, ssh login
how can i use this order in fedora core?
Blocking really _ALL_ traffic can cause undesired effects. In fact quite a few applications use the internal loopback interface for internal communication. So the following two rules should be added to allow this:
iptables -A INPUT -i lo
iptables -A OUTPUT -o lo
which allow all traffic via the loopback interface. This should be perfectly safe, even in a hostile environment since all external traffic is still blocked.
hi,
It’s better to disable the the network service than using such firewall