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jdsanjorge
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      09-10-2007, 09:25 AM
Hello,

I have two hosts:

A: 192.168.1.77 // 255.255.0.0

B: 192.168.8.11 // 255.255.255.0

I can ping from B to A but I´m not from A to B, what´s the problem???

Thanks


 
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Mathieu CHATEAU
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      09-10-2007, 09:36 AM
Hello,

1/ your netmask aren't good. B need a gateway to reach A and you didn't say
about it. It may works if a gateway between route the packet, but it's
asymmetric.
B => GW =A => B
As you understand, A anwser directly to B without going through the Gateway.

2/B would have a firewall that prevent inbound ping (echo request) while it
accept answer (echo reply)

correct your netmask and check firewall
--
Cordialement,
Mathieu CHATEAU
http://lordoftheping.blogspot.com


"jdsanjorge" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hello,
>
> I have two hosts:
>
> A: 192.168.1.77 // 255.255.0.0
>
> B: 192.168.8.11 // 255.255.255.0
>
> I can ping from B to A but I´m not from A to B, what´s the problem???
>
> Thanks
>
>


 
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jdsanjorge
Guest
Posts: n/a

 
      09-10-2007, 09:53 AM
I have a VPN Server, which assign automatically ip´s AND SUBNET MASK to vpn
clients: (192.168.8.0 // 255.255.255.0)

VPN Server is also a firewall and router. I don´t have possibility to modify
this configuration...

any idea???? thankssssssssssssss


"Mathieu CHATEAU" <(E-Mail Removed)> escribió en el mensaje
news:(E-Mail Removed)...
> Hello,
>
> 1/ your netmask aren't good. B need a gateway to reach A and you didn't
> say about it. It may works if a gateway between route the packet, but it's
> asymmetric.
> B => GW =A => B
> As you understand, A anwser directly to B without going through the
> Gateway.
>
> 2/B would have a firewall that prevent inbound ping (echo request) while
> it accept answer (echo reply)
>
> correct your netmask and check firewall
> --
> Cordialement,
> Mathieu CHATEAU
> http://lordoftheping.blogspot.com
>
>
> "jdsanjorge" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> Hello,
>>
>> I have two hosts:
>>
>> A: 192.168.1.77 // 255.255.0.0
>>
>> B: 192.168.8.11 // 255.255.255.0
>>
>> I can ping from B to A but I´m not from A to B, what´s the problem???
>>
>> Thanks
>>
>>

>



 
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Mathieu CHATEAU
Guest
Posts: n/a

 
      09-10-2007, 09:59 AM
A to B : check the firewall part of the vpn router

Change the netmask of A or move your vpn clients to different subnet that
will make consistent routing like 172.16.0.0

--
Cordialement,
Mathieu CHATEAU
http://lordoftheping.blogspot.com


"jdsanjorge" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>I have a VPN Server, which assign automatically ip´s AND SUBNET MASK to vpn
>clients: (192.168.8.0 // 255.255.255.0)
>
> VPN Server is also a firewall and router. I don´t have possibility to
> modify this configuration...
>
> any idea???? thankssssssssssssss
>
>
> "Mathieu CHATEAU" <(E-Mail Removed)> escribió en el mensaje
> news:(E-Mail Removed)...
>> Hello,
>>
>> 1/ your netmask aren't good. B need a gateway to reach A and you didn't
>> say about it. It may works if a gateway between route the packet, but
>> it's asymmetric.
>> B => GW =A => B
>> As you understand, A anwser directly to B without going through the
>> Gateway.
>>
>> 2/B would have a firewall that prevent inbound ping (echo request) while
>> it accept answer (echo reply)
>>
>> correct your netmask and check firewall
>> --
>> Cordialement,
>> Mathieu CHATEAU
>> http://lordoftheping.blogspot.com
>>
>>
>> "jdsanjorge" <(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed)...
>>> Hello,
>>>
>>> I have two hosts:
>>>
>>> A: 192.168.1.77 // 255.255.0.0
>>>
>>> B: 192.168.8.11 // 255.255.255.0
>>>
>>> I can ping from B to A but I´m not from A to B, what´s the problem???
>>>
>>> Thanks
>>>
>>>

>>

>
>


 
Reply With Quote
 
jdsanjorge
Guest
Posts: n/a

 
      09-10-2007, 10:07 AM
I make it, thanks!!

"Mathieu CHATEAU" <(E-Mail Removed)> escribió en el mensaje
news:(E-Mail Removed)...
>A to B : check the firewall part of the vpn router
>
> Change the netmask of A or move your vpn clients to different subnet that
> will make consistent routing like 172.16.0.0
>
> --
> Cordialement,
> Mathieu CHATEAU
> http://lordoftheping.blogspot.com
>
>
> "jdsanjorge" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>>I have a VPN Server, which assign automatically ip´s AND SUBNET MASK to
>>vpn clients: (192.168.8.0 // 255.255.255.0)
>>
>> VPN Server is also a firewall and router. I don´t have possibility to
>> modify this configuration...
>>
>> any idea???? thankssssssssssssss
>>
>>
>> "Mathieu CHATEAU" <(E-Mail Removed)> escribió en el mensaje
>> news:(E-Mail Removed)...
>>> Hello,
>>>
>>> 1/ your netmask aren't good. B need a gateway to reach A and you didn't
>>> say about it. It may works if a gateway between route the packet, but
>>> it's asymmetric.
>>> B => GW =A => B
>>> As you understand, A anwser directly to B without going through the
>>> Gateway.
>>>
>>> 2/B would have a firewall that prevent inbound ping (echo request) while
>>> it accept answer (echo reply)
>>>
>>> correct your netmask and check firewall
>>> --
>>> Cordialement,
>>> Mathieu CHATEAU
>>> http://lordoftheping.blogspot.com
>>>
>>>
>>> "jdsanjorge" <(E-Mail Removed)> wrote in message
>>> news:(E-Mail Removed)...
>>>> Hello,
>>>>
>>>> I have two hosts:
>>>>
>>>> A: 192.168.1.77 // 255.255.0.0
>>>>
>>>> B: 192.168.8.11 // 255.255.255.0
>>>>
>>>> I can ping from B to A but I´m not from A to B, what´s the problem???
>>>>
>>>> Thanks
>>>>
>>>>
>>>

>>
>>

>



 
Reply With Quote
 
Mathieu CHATEAU
Guest
Posts: n/a

 
      09-10-2007, 10:09 AM
enjoy!

--
Cordialement,
Mathieu CHATEAU
http://lordoftheping.blogspot.com


"jdsanjorge" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
>I make it, thanks!!
>
> "Mathieu CHATEAU" <(E-Mail Removed)> escribió en el mensaje
> news:(E-Mail Removed)...
>>A to B : check the firewall part of the vpn router
>>
>> Change the netmask of A or move your vpn clients to different subnet that
>> will make consistent routing like 172.16.0.0
>>
>> --
>> Cordialement,
>> Mathieu CHATEAU
>> http://lordoftheping.blogspot.com
>>
>>
>> "jdsanjorge" <(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed)...
>>>I have a VPN Server, which assign automatically ip´s AND SUBNET MASK to
>>>vpn clients: (192.168.8.0 // 255.255.255.0)
>>>
>>> VPN Server is also a firewall and router. I don´t have possibility to
>>> modify this configuration...
>>>
>>> any idea???? thankssssssssssssss
>>>
>>>
>>> "Mathieu CHATEAU" <(E-Mail Removed)> escribió en el mensaje
>>> news:(E-Mail Removed)...
>>>> Hello,
>>>>
>>>> 1/ your netmask aren't good. B need a gateway to reach A and you didn't
>>>> say about it. It may works if a gateway between route the packet, but
>>>> it's asymmetric.
>>>> B => GW =A => B
>>>> As you understand, A anwser directly to B without going through the
>>>> Gateway.
>>>>
>>>> 2/B would have a firewall that prevent inbound ping (echo request)
>>>> while it accept answer (echo reply)
>>>>
>>>> correct your netmask and check firewall
>>>> --
>>>> Cordialement,
>>>> Mathieu CHATEAU
>>>> http://lordoftheping.blogspot.com
>>>>
>>>>
>>>> "jdsanjorge" <(E-Mail Removed)> wrote in message
>>>> news:(E-Mail Removed)...
>>>>> Hello,
>>>>>
>>>>> I have two hosts:
>>>>>
>>>>> A: 192.168.1.77 // 255.255.0.0
>>>>>
>>>>> B: 192.168.8.11 // 255.255.255.0
>>>>>
>>>>> I can ping from B to A but I´m not from A to B, what´s the problem???
>>>>>
>>>>> Thanks
>>>>>
>>>>>
>>>>
>>>
>>>

>>

>
>


 
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