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roee klinger
Asked: 2020-10-14 11:06:25 +0800 CST

How to block all outgoing traffic from one program on specific NIC?

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This might be a stupid question but I was not able to google the right thing to find the answer.

How do I block all outgoing traffic from eth1 on Squid on the TCP level?

I have used the iptables rule below before when using Squid in Docker, not sure how to implement it without Docker.

iptables -t filter -I FORWARD -p tcp -o eth0 -m mark --mark 0x0c10f -j REJECT
networking proxy squid iptables

1 Answers

  1. From the squid box, block all outgoing traffic

    $ sudo iptables -A OUTPUT -j DROP
    • -1