I am trying to forward port 80 on 192.168.1.5 and 127.0.0.1 to
192.168.1.100:8080. I am using a example from the internet
but its not working. I am running a proxy server on
192.168.1.100.

Can you please tell me how I can get this to work please? I am
using one nic card on each computer and I can ping all the ip
address on the local network.


modprobe iptable_nat
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -A PREROUTING -t nat -p tcp -d 127.0.0.1 --dport 80 -j DNAT --to
192.168.1.100:8080
iptables -A PREROUTING -t nat -p tcp -d 192.168.1.5 --dport 80 -j DNAT --to
192.168.1.100:8080
iptables -A PREROUTING -t nat -p tcp -d 127.0.0.1 --dport 53 -j DNAT --to
192.168.1.100:8080
iptables -t nat -A PREROUTING -p tcp --dport 80 -i eth0 -j DNAT --to
192.168.1.100:8080


--- Synchronet 3.15a-Win32 NewsLink 1.85
- telnet://sbbs.cyberchatnet.com:23 -

On Mon, 26 Oct 2009 21:32:46 -0400, "phil" <phil@sbbs.cyberchatnet.com.remove-tgz-this> wrote:

>I am trying to forward port 80 on 192.168.1.5 and 127.0.0.1 to
>192.168.1.100:8080. I am using a example from the internet
>but its not working. I am running a proxy server on
>192.168.1.100.
>
>Can you please tell me how I can get this to work please? I am
>using one nic card on each computer and I can ping all the ip
>address on the local network.
>
>
>modprobe iptable_nat
>iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
>echo 1 > /proc/sys/net/ipv4/ip_forward
>iptables -A PREROUTING -t nat -p tcp -d 127.0.0.1 --dport 80 -j DNAT --to
>192.168.1.100:8080
>iptables -A PREROUTING -t nat -p tcp -d 192.168.1.5 --dport 80 -j DNAT --to
>192.168.1.100:8080
>iptables -A PREROUTING -t nat -p tcp -d 127.0.0.1 --dport 53 -j DNAT --to
>192.168.1.100:8080
>iptables -t nat -A PREROUTING -p tcp --dport 80 -i eth0 -j DNAT --to
>192.168.1.100:8080

port forwading requires two rules per port, plus optional logging,
for example:

# the NAT bit
iptables -t nat -A PREROUTING -p tcp -i $xf_world \
--dport $torrent_port \
-j DNAT --to-destination $torrent_host
# the port-forward, logging
iptables -A FORWARD -p tcp -m state --state NEW \
--dport $torrent_port \
$limit_rate_log "JLE:fwd:okay ingress "
# the port-forward, action
iptables -A FORWARD -p tcp -m state --state NEW \
--dport $torrent_port -j ACCEPT


Grant.
--
http://bugsplatter.id.au

To: Grant
Re: Re: Port forwarding
By: Grant to alt.os.linux on Tue Oct 27 2009 12:55:38

> From Newsgroup: alt.os.linux
>
> On Mon, 26 Oct 2009 21:32:46 -0400, "phil" <phil@sbbs.cyberchatnet.com.remov
>
> >I am trying to forward port 80 on 192.168.1.5 and 127.0.0.1 to
> >192.168.1.100:8080. I am using a example from the internet
> >but its not working. I am running a proxy server on
> >192.168.1.100.
> >
> >Can you please tell me how I can get this to work please? I am
> >using one nic card on each computer and I can ping all the ip
> >address on the local network.
> >
> >
> >modprobe iptable_nat
> >iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
> >echo 1 > /proc/sys/net/ipv4/ip_forward
> >iptables -A PREROUTING -t nat -p tcp -d 127.0.0.1 --dport 80 -j DNAT --to
> >192.168.1.100:8080
> >iptables -A PREROUTING -t nat -p tcp -d 192.168.1.5 --dport 80 -j DNAT --to
> >192.168.1.100:8080
> >iptables -A PREROUTING -t nat -p tcp -d 127.0.0.1 --dport 53 -j DNAT --to
> >192.168.1.100:8080
> >iptables -t nat -A PREROUTING -p tcp --dport 80 -i eth0 -j DNAT --to
> >192.168.1.100:8080
>
> port forwading requires two rules per port, plus optional logging,
> for example:
>
> # the NAT bit
> iptables -t nat -A PREROUTING -p tcp -i $xf_world \
> --dport $torrent_port \
> -j DNAT --to-destination $torrent_host
> # the port-forward, logging
> iptables -A FORWARD -p tcp -m state --state NEW \
> --dport $torrent_port \
> $limit_rate_log "JLE:fwd:okay ingress "
> # the port-forward, action
> iptables -A FORWARD -p tcp -m state --state NEW \
> --dport $torrent_port -j ACCEPT
>
>
> Grant.
> --
> http://bugsplatter.id.au
> --- Synchronet 3.15a-Win32 NewsLink 1.85
Can you please give me a example that I can paste and use in my script that
will work with the example that I have above?

--- Synchronet 3.15a-Win32 NewsLink 1.85
- telnet://sbbs.cyberchatnet.com:23 -

To: phil
> Re: Re: Port forwarding
> By: Grant to alt.os.linux on Tue Oct 27 2009 12:55:38
>
> > From Newsgroup: alt.os.linux
> >
> > On Mon, 26 Oct 2009 21:32:46 -0400, "phil"
> > <phil@sbbs.cyberchatnet.com.remov
> > >I am trying to forward port 80 on 192.168.1.5 and 127.0.0.1 to
> > >192.168.1.100:8080. I am using a example from the internet
> > >but its not working. I am running a proxy server on
> > >192.168.1.100.
> > >
> > >Can you please tell me how I can get this to work please? I am
> > >using one nic card on each computer and I can ping all the ip
> > >address on the local network.
> > >
> > >
> > >modprobe iptable_nat
> > >iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
> > >echo 1 > /proc/sys/net/ipv4/ip_forward
> > >iptables -A PREROUTING -t nat -p tcp -d 127.0.0.1 --dport 80 -j DNAT
> > --to >192.168.1.100:8080
> > >iptables -A PREROUTING -t nat -p tcp -d 192.168.1.5 --dport 80 -j DNAT
> > --to >192.168.1.100:8080
> > >iptables -A PREROUTING -t nat -p tcp -d 127.0.0.1 --dport 53 -j DNAT
> > --to >192.168.1.100:8080
> > >iptables -t nat -A PREROUTING -p tcp --dport 80 -i eth0 -j DNAT --to
> > >192.168.1.100:8080
> >
> > port forwading requires two rules per port, plus optional logging,
> > for example:
> >
> > # the NAT bit
> > iptables -t nat -A PREROUTING -p tcp -i $xf_world \
> > --dport $torrent_port \
> > -j DNAT --to-destination $torrent_host
> > # the port-forward, logging
> > iptables -A FORWARD -p tcp -m state --state NEW \
> > --dport $torrent_port \
> > $limit_rate_log "JLE:fwd:okay ingress "
> > # the port-forward, action
> > iptables -A FORWARD -p tcp -m state --state NEW \
> > --dport $torrent_port -j ACCEPT
> >
> >
> > Grant.
> > --
> > http://bugsplatter.id.au
> > --- Synchronet 3.15a-Win32 NewsLink 1.85
> Can you please give me a example that I can paste and use in my script that
> will work with the example that I have above?
>


I was reffering to a example that I can use this is script so all I have to do
is copy and paste it without making modifications to it.

modprobe iptable_nat
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -A PREROUTING -t nat -p tcp -d 127.0.0.1 --dport 80 -j DNAT --to
192.168.1.100:8080
iptables -A PREROUTING -t nat -p tcp -d 192.168.1.5 --dport 80 -j DNAT --to
192.168.1.100:8080
iptables -A PREROUTING -t nat -p tcp -d 127.0.0.1 --dport 53 -j DNAT --to
192.168.1.100:8080
iptables -t nat -A PREROUTING -p tcp --dport 80 -i eth0 -j DNAT --to
192.168.1.100:8080


Thanks
--- Synchronet 3.15a-Win32 NewsLink 1.85
- telnet://sbbs.cyberchatnet.com:23 -

Hello,

phil a écrit :
> I am trying to forward port 80 on 192.168.1.5 and 127.0.0.1 to
> 192.168.1.100:8080.

That is not very clear. Please explain what is the source host, the
original destination and the forwarding host.