Re: Linux Router

2007-09-23 Thread Benny Amorsen
> "CN" == Carlos Narváez <[EMAIL PROTECTED]> writes:

CN> - IP Forwarding has been enabled on the router via "echo 1 >
CN> /proc/sys/net/ipv4/ip_forward"

Try cat /proc/sys/net/ipv4/conf/*/forwarding. If any of them are 0,
then echo 1 > /proc/sys/net/ipv4/conf/all/forwarding.


/Benny


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Re: Linux Router

2007-09-23 Thread Jan Engelhardt

On Sep 22 2007 22:10, ben soo wrote:
>
> i used to add proxy arp's on the router when i had problems like this.  Dunno
> if it's the recommended fix, but it worked.

There is certainly no Proxy ARP required here since you do not
do subnet sharing or funny games like that.

> http://en.wikipedia.org/wiki/Proxy_arp
>
> Carlos Narváez wrote:
>> +---+ . ++
>> ¦ 192.168.251.1 +---+ 192.168.251.10 ¦ . ++
>> +---+ . ¦ 192.168.254.17 +---+ 192.168.254.16 ¦
>> . . . . . . . . . . ++ . ++
>> 
>> - A route has been configured on 192.168.251.1 to point all traffic
>> for 192.168.254.0/24 to 192.168.251.10.
>> 
>> - A route has been configured on 192.168.254.16 to point all traffic
>> for 192.168.251.0/24 to 192.168.254.17.
>> 
>> - The command "iptables -I FORWARD -j ACCEPT" has been executed.

Well, and do the counters increase?

>> Now.. here's what happens. 192.168.251.10 can ping both interfaces on
>> the router. 192.168.254.16 can also ping both interfaces on the
>> router. However, 192.168.251.1 cannot ping 192.168.254.16, and
>> likewise, 192.168.254.16 cannot ping 192.168.251.1.
>> 
>> What have I forgotten?

Default GWs (though if you ahve routes, ok..).

On 251.1, use `ip r g 192.168.254.16` and it should
show "192.168.254.16 via 192.168.251.10 dev eth0 ...".

Same on the other side.
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Re: Linux Router

2007-09-23 Thread Jan Engelhardt

On Sep 22 2007 22:10, ben soo wrote:

 i used to add proxy arp's on the router when i had problems like this.  Dunno
 if it's the recommended fix, but it worked.

There is certainly no Proxy ARP required here since you do not
do subnet sharing or funny games like that.

 http://en.wikipedia.org/wiki/Proxy_arp

 Carlos Narváez wrote:
 +---+ . ++
 ¦ 192.168.251.1 +---+ 192.168.251.10 ¦ . ++
 +---+ . ¦ 192.168.254.17 +---+ 192.168.254.16 ¦
 . . . . . . . . . . ++ . ++
 
 - A route has been configured on 192.168.251.1 to point all traffic
 for 192.168.254.0/24 to 192.168.251.10.
 
 - A route has been configured on 192.168.254.16 to point all traffic
 for 192.168.251.0/24 to 192.168.254.17.
 
 - The command iptables -I FORWARD -j ACCEPT has been executed.

Well, and do the counters increase?

 Now.. here's what happens. 192.168.251.10 can ping both interfaces on
 the router. 192.168.254.16 can also ping both interfaces on the
 router. However, 192.168.251.1 cannot ping 192.168.254.16, and
 likewise, 192.168.254.16 cannot ping 192.168.251.1.
 
 What have I forgotten?

Default GWs (though if you ahve routes, ok..).

On 251.1, use `ip r g 192.168.254.16` and it should
show 192.168.254.16 via 192.168.251.10 dev eth0 

Same on the other side.
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Re: Linux Router

2007-09-23 Thread Benny Amorsen
 CN == Carlos Narváez [EMAIL PROTECTED] writes:

CN - IP Forwarding has been enabled on the router via echo 1 
CN /proc/sys/net/ipv4/ip_forward

Try cat /proc/sys/net/ipv4/conf/*/forwarding. If any of them are 0,
then echo 1  /proc/sys/net/ipv4/conf/all/forwarding.


/Benny


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Re: Linux Router

2007-09-22 Thread ben soo
i used to add proxy arp's on the router when i had problems like 
this.  Dunno if it's the recommended fix, but it worked.


http://en.wikipedia.org/wiki/Proxy_arp

Carlos Narváez wrote:

 This is starting to frustrate me, because it should be much simpler
than it seems to be, and I feel like I'm missing something small and
obvious.

I have two private networks, we'll say 192.168.254.0/24 and
192.168.251.0/24. And I have a linux box in the middle with addresses
192.168.254.17 and 192.168.251.10:


+---+ . ++
¦ 192.168.251.1 +---+ 192.168.251.10 ¦ . ++
+---+ . ¦ 192.168.254.17 +---+ 192.168.254.16 ¦
. . . . . . . . . . ++ . ++


There is no NAT involved.. I just want the box in the middle to pass
traffic between the two networks. Here is what I have done:

- IP Forwarding has been enabled on the router via "echo 1 >
/proc/sys/net/ipv4/ip_forward"

- A route has been configured on 192.168.251.1 to point all traffic
for 192.168.254.0/24 to 192.168.251.10.

- A route has been configured on 192.168.254.16 to point all traffic
for 192.168.251.0/24 to 192.168.254.17.

- The command "iptables -I FORWARD -j ACCEPT" has been executed.

Now.. here's what happens. 192.168.251.10 can ping both interfaces on
the router. 192.168.254.16 can also ping both interfaces on the
router. However, 192.168.251.1 cannot ping 192.168.254.16, and
likewise, 192.168.254.16 cannot ping 192.168.251.1.

What have I forgotten?



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Not kernel dev related story (Re: Linux Router)

2007-09-22 Thread Oleg Verych
* Sat, 22 Sep 2007 18:09:15 -0500

>  This is starting to frustrate me, because it should be much simpler
> than it seems to be, and I feel like I'm missing something small and
> obvious.

Please address such questions to any user forum, or to
<[EMAIL PROTECTED]> otherwise.

While doing that, provide exact output of route and firewall tables,
but not just semi hand-waving with just one command.

Thank you.

-
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the body of a message to [EMAIL PROTECTED]
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Linux Router

2007-09-22 Thread Carlos Narváez
 This is starting to frustrate me, because it should be much simpler
than it seems to be, and I feel like I'm missing something small and
obvious.

I have two private networks, we'll say 192.168.254.0/24 and
192.168.251.0/24. And I have a linux box in the middle with addresses
192.168.254.17 and 192.168.251.10:


+---+ . ++
¦ 192.168.251.1 +---+ 192.168.251.10 ¦ . ++
+---+ . ¦ 192.168.254.17 +---+ 192.168.254.16 ¦
. . . . . . . . . . ++ . ++


There is no NAT involved.. I just want the box in the middle to pass
traffic between the two networks. Here is what I have done:

- IP Forwarding has been enabled on the router via "echo 1 >
/proc/sys/net/ipv4/ip_forward"

- A route has been configured on 192.168.251.1 to point all traffic
for 192.168.254.0/24 to 192.168.251.10.

- A route has been configured on 192.168.254.16 to point all traffic
for 192.168.251.0/24 to 192.168.254.17.

- The command "iptables -I FORWARD -j ACCEPT" has been executed.

Now.. here's what happens. 192.168.251.10 can ping both interfaces on
the router. 192.168.254.16 can also ping both interfaces on the
router. However, 192.168.251.1 cannot ping 192.168.254.16, and
likewise, 192.168.254.16 cannot ping 192.168.251.1.

What have I forgotten?

-- 
Carlos Narváez
http://www.juegopixel.com
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the body of a message to [EMAIL PROTECTED]
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Linux Router

2007-09-22 Thread Carlos Narváez
 This is starting to frustrate me, because it should be much simpler
than it seems to be, and I feel like I'm missing something small and
obvious.

I have two private networks, we'll say 192.168.254.0/24 and
192.168.251.0/24. And I have a linux box in the middle with addresses
192.168.254.17 and 192.168.251.10:


+---+ . ++
¦ 192.168.251.1 +---+ 192.168.251.10 ¦ . ++
+---+ . ¦ 192.168.254.17 +---+ 192.168.254.16 ¦
. . . . . . . . . . ++ . ++


There is no NAT involved.. I just want the box in the middle to pass
traffic between the two networks. Here is what I have done:

- IP Forwarding has been enabled on the router via echo 1 
/proc/sys/net/ipv4/ip_forward

- A route has been configured on 192.168.251.1 to point all traffic
for 192.168.254.0/24 to 192.168.251.10.

- A route has been configured on 192.168.254.16 to point all traffic
for 192.168.251.0/24 to 192.168.254.17.

- The command iptables -I FORWARD -j ACCEPT has been executed.

Now.. here's what happens. 192.168.251.10 can ping both interfaces on
the router. 192.168.254.16 can also ping both interfaces on the
router. However, 192.168.251.1 cannot ping 192.168.254.16, and
likewise, 192.168.254.16 cannot ping 192.168.251.1.

What have I forgotten?

-- 
Carlos Narváez
http://www.juegopixel.com
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
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Not kernel dev related story (Re: Linux Router)

2007-09-22 Thread Oleg Verych
* Sat, 22 Sep 2007 18:09:15 -0500

  This is starting to frustrate me, because it should be much simpler
 than it seems to be, and I feel like I'm missing something small and
 obvious.

Please address such questions to any user forum, or to
[EMAIL PROTECTED] otherwise.

While doing that, provide exact output of route and firewall tables,
but not just semi hand-waving with just one command.

Thank you.

-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/


Re: Linux Router

2007-09-22 Thread ben soo
i used to add proxy arp's on the router when i had problems like 
this.  Dunno if it's the recommended fix, but it worked.


http://en.wikipedia.org/wiki/Proxy_arp

Carlos Narváez wrote:

 This is starting to frustrate me, because it should be much simpler
than it seems to be, and I feel like I'm missing something small and
obvious.

I have two private networks, we'll say 192.168.254.0/24 and
192.168.251.0/24. And I have a linux box in the middle with addresses
192.168.254.17 and 192.168.251.10:


+---+ . ++
¦ 192.168.251.1 +---+ 192.168.251.10 ¦ . ++
+---+ . ¦ 192.168.254.17 +---+ 192.168.254.16 ¦
. . . . . . . . . . ++ . ++


There is no NAT involved.. I just want the box in the middle to pass
traffic between the two networks. Here is what I have done:

- IP Forwarding has been enabled on the router via echo 1 
/proc/sys/net/ipv4/ip_forward

- A route has been configured on 192.168.251.1 to point all traffic
for 192.168.254.0/24 to 192.168.251.10.

- A route has been configured on 192.168.254.16 to point all traffic
for 192.168.251.0/24 to 192.168.254.17.

- The command iptables -I FORWARD -j ACCEPT has been executed.

Now.. here's what happens. 192.168.251.10 can ping both interfaces on
the router. 192.168.254.16 can also ping both interfaces on the
router. However, 192.168.251.1 cannot ping 192.168.254.16, and
likewise, 192.168.254.16 cannot ping 192.168.251.1.

What have I forgotten?



-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/