quote:

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> PREROUTING ACCEPT [473:42295]
> POSTROUTING ACCEPT [80:10462]
> OUTPUT ACCEPT [1238:63295]

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quote:

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> INPUT ACCEPT [176:30771]
> FORWARD ACCEPT [0:0]
> OUTPUT ACCEPT [11817:2852225]
> block - [0:0]

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quote:

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> Hello folks, I've just started dabbling with Linux(RedHat 8.0) networking,
> trying to teach myself the basics. However I'm having trouble with my
> firewall. going through the howtos and some web pages I've worked out that
> this makes a functional firewall and NAT:
>
> iptables -N block
> iptables -A block -m state --state ESTABLISHED,RELATED -j ACCEPT
> iptables -A block -m state --state NEW -i ! eth0 -j ACCEPT

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quote:

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> iptables -A block -j DROP
> iptables -A INPUT -j block
> iptables -A FORWARD -j block
> iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
>
> when I save off the iptable eveything works fine.
>
> However I can't work out how to open a port.
>
> I'm trying to open TCP port 4662(inbound) to any IP address. Can anyone
> tell how I might do this.
>
> My iptables file looks like this:
> ---------------------------------------------------
> # Generated by iptables-save v1.2.6a on Mon Aug 4 19:34:32 2003
> *nat
> [1249:57305] -A POSTROUTING -o eth0 -j MASQUERADE
> COMMIT
> # Completed on Mon Aug 4 19:34:32 2003
> # Generated by iptables-save v1.2.6a on Mon Aug 4 19:34:32 2003
> *filter
> [12699:9285652] -A INPUT -j block
> [1896:800733] -A FORWARD -j block
> [13498:9970655] -A block -m state --state RELATED,ESTABLISHED -j ACCEPT
> [839:74872] -A block -i ! eth0 -m state --state NEW -j ACCEPT
> [258:40858] -A block -j DROP
> COMMIT
> # Completed on Mon Aug 4 19:34:32 2003
> -------------------------------------------------------------
>
> Any help would be much appreciated.
> Thanks
>
> --
> Morgan.

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quote:

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> Morgan Sales <msalesDIESPAMMER@ntlworld.com> wrote:
>
>
> at this point before jumping to block you need to insert:
>
> iptables -A INPUT -p tcp --d-port 4662 -j ACCEPT

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