Re: --policy DROP kills everything?

[David Busby <busby@edoceo.com>]

R. DuFresne wrote:
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> We found that in a 1:1 nat setup the policy for the forward chain has to 
> be accept or traffic will not flow.
> 
> Thanks,
> 
> Ron DuFresne

My box only has rules in the INPUT chain, doesn't do IP forwarding/routing at all.
I have these rules below:

Chain INPUT (policy DROP)
target     prot opt source               destination
ACCEPT     all  --  127.0.0.0/8          0.0.0.0/0
ACCEPT     udp  --  192.168.42.1         0.0.0.0/0           udp dpt:53
ACCEPT     udp  --  192.168.42.1         0.0.0.0/0           udp dpt:123
ACCEPT     udp  --  192.168.42.1         0.0.0.0/0           udp dpt:514
ACCEPT     tcp  --  0.0.0.0/0            192.168.42.2        tcp dpt:22
ACCEPT     tcp  --  0.0.0.0/0            192.168.42.2        tcp dpt:80
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED
LOG        all  --  0.0.0.0/0            0.0.0.0/0           LOG flags 0 level 4

An cannot make new connections to port 22 or port 80, I see it in the logs.
An existing ssh connection will stay if I connect with no rules then run iptables-restore.
This seems totally odd to me.  The UDP traffic is also blocked.  Everyone is telling me that these rules should work, 
new connections should be allowed and such but it's not the case.  Here's what my modules look like:

imperium root # lsmod
Module                  Size  Used by
ipt_LOG                 6272  1
ipt_state               1472  1
ip_conntrack           39860  1 ipt_state
iptable_filter          2944  1
ip_tables              16320  3 ipt_LOG,ipt_state,iptable_filter

So everything looks loaded OK too, but it's not working, I even added this rule:

ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:22
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:80

But still cannot make a new connection to port 22 or 80, what gives?  What do I try now?

/djb