Multicast routing question...

Multicast routing question...

[Guilherme Cox]

I'd like to know if I can use iptables to solve one problem.

My network is:
<----Local Network/NAT (192.168.7.x)              -- eth0
<----Internet link/Cisco router                   -- eth1
<----ViaSat router/A Satelite link(10.254.103.x)  -- eth2

My default gateway is the Cisco router IP.
I have static routes to networks connected using eth2.

My /sbin/route  is:
cox@earth:~$ /sbin/route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
xxx.xxx.xxx.128  0.0.0.0         255.255.255.192 U     0      0        0
eth1
192.168.7.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.149.0   10.254.103.1    255.255.255.0   UG    0      0        0 eth2
yyy.yyy.yyy.0   10.254.103.1    255.255.255.0   UG    0      0        0 eth2
10.254.103.0    0.0.0.0         255.255.255.0   U     0      0        0 eth2
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
224.0.0.0       0.0.0.0         240.0.0.0       U     0      0        0 eth0
0.0.0.0         xxx.xxx.xx.129  0.0.0.0         UG    1      0        0 eth1

--x--
Using this model the Multicast packets came from eth2 aren't routed to my
Local Network (eth0).
If I connect the VaiSat router on my switch and use ip-aliases, I can
receive the IGMP. However, it is unsafe. I need to mantain my network but
the multicast packets must be routed to eth0.

Do you know how can I do? Any ideias? Did anybody have the same problem?

If you want more information about my network, please contact me.

Thanks and sorry my english mistakes.

cox

port redirect for localy generated request

[Sundaram Ramasamy]

Hi,

With this rule incoming request for port 80 redirected to port 8080. But
this is not working localy generated request.

iptables -t nat -A PREROUTING -p tcp --dport 80 -d LISTEN_IP -j DNAT --to
LISTEN_IP:80

How will i redirected local request port 80 to port 8080 ?

Thanks

RE: port redirect for locally generated request

[Mark E. Donaldson]

Use REDIRECT:

iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080

specify an interface if necessary.


-----Original Message-----
From: netfilter-admin@lists.netfilter.org
[mailto:netfilter-admin@lists.netfilter.org]On Behalf Of Sundaram
Ramasamy
Sent: Friday, August 29, 2003 6:56 AM
To: netfilter@lists.netfilter.org
Subject: port redirect for localy generated request



Hi,

With this rule incoming request for port 80 redirected to port 8080. But
this is not working localy generated request.

iptables -t nat -A PREROUTING -p tcp --dport 80 -d LISTEN_IP -j DNAT --to
LISTEN_IP:80

How will i redirected local request port 80 to port 8080 ?

Thanks

Re: port redirect for localy generated request

[Thorsten Scherf]

> With this rule incoming request for port 80 redirected to port 8080. But
> this is not working localy generated request.
> iptables -t nat -A PREROUTING -p tcp --dport 80 -d LISTEN_IP -j DNAT --to
> LISTEN_IP:80

You have to use the OUTPUT Chain for localy generated packets:

iptables -t nat -A OUTPUT -p tcp --dport -d $LISTEN_IP -j DNAT --to 
$LISTEN_IP:8080


Greetings,
Thorsten Scherf
RHCE, RHCX

Multicast routing question...

[Guilherme Cox]

I'd like to know if I can use iptables to solve one problem.

My network is:
<----Local Network/NAT (192.168.7.x)              -- eth0
<----Internet link/Cisco router                   -- eth1
<----ViaSat router/A Satelite link(10.254.103.x)  -- eth2

My default gateway is the Cisco router IP.
I have static routes to networks connected using eth2.

My /sbin/route  is:
cox@earth:~$ /sbin/route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
xxx.xxx.xxx.128  0.0.0.0         255.255.255.192 U     0      0        0
eth1
192.168.7.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.149.0   10.254.103.1    255.255.255.0   UG    0      0        0 eth2
yyy.yyy.yyy.0   10.254.103.1    255.255.255.0   UG    0      0        0 eth2
10.254.103.0    0.0.0.0         255.255.255.0   U     0      0        0 eth2
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
224.0.0.0       0.0.0.0         240.0.0.0       U     0      0        0 eth0
0.0.0.0         xxx.xxx.xx.129  0.0.0.0         UG    1      0        0 eth1

--x--
Using this model the Multicast packets came from eth2 aren't routed to my
Local Network (eth0).
If I connect the VaiSat router on my switch and use ip-aliases, I can
receive the IGMP. However, it is unsafe. I need to mantain my network but
the multicast packets must be routed to eth0.

Do you know how can I do? Any ideias? Did anybody have the same problem?

If you want more information about my network, please contact me.

Thanks and sorry my english mistakes.

cox