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Flushing iptables does not work. [message #49976] Tue, 16 July 2013 07:40 Go to next message
tec-hq@FreeBit.NET is currently offline  tec-hq@FreeBit.NET
Messages: 1
Registered: July 2013
Junior Member
Hi,

I use OpenVZ with ubuntu12.04 .
I tried to update kernel, but after update iptables -F does not work.
Is this a problem of kernel ?

Step:
1)Do "iptables -F# on container.
2)Container receive PING from another server.
3)Do "iptables -P INPUT DROP" on container.
4)Container doesn't receive PING.
5)Do "iptables -F"
6)Still container doesn't receive PING.

Details:
vzctl-3.0.30.2-1.x86_64
vzctl-lib-3.0.30.2-1.x86_64
vzkernel-2.6.32-042stab078.27.x86_64

Thank you.
Re: Flushing iptables does not work. [message #49985 is a reply to message #49976] Wed, 17 July 2013 17:44 Go to previous message
Paparaciz
Messages: 302
Registered: August 2009
Senior Member
iptables -F have nothing to do if you change policy rule

with iptables -P INPUT DROP you define that INPUT always have to be droped. than you can just add rules with accept.

if you would add some rules (as example iptables -A INPUT -i venet0 -p icmp -j ACCEPT), than iptables -F will delete this rule.

if you want change policy rule, than you have to explicitly to do so, as example iptables -P INPUT ACCEPT.

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