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VIP Mentor

Re: Help me to understand the work of NAT via PPTP

Hello

Have you made the changes suggested and what is the present status?



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future
Highlighted
Beginner

Re: Help me to understand the work of NAT via PPTP

No changes.


from router

cisco.k259#ping 8.8.8.8 source 192.168.0.5
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
Packet sent with a source address of 192.168.0.5
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/42/44 ms
cisco.k259#
Mar 13 16:57:56.436: NAT: s=192.168.0.5->90.157.26.245, d=8.8.8.8 [1657]
Mar 13 16:57:56.480: NAT*: s=8.8.8.8, d=90.157.26.245->192.168.0.5 [0]
Mar 13 16:57:56.480: NAT: s=192.168.0.5->90.157.26.245, d=8.8.8.8 [1658]
Mar 13 16:57:56.524: NAT*: s=8.8.8.8, d=90.157.26.245->192.168.0.5 [0]
Mar 13 16:57:56.524: NAT: s=192.168.0.5->90.157.26.245, d=8.8.8.8 [1659]
Mar 13 16:57:56.568: NAT*: s=8.8.8.8, d=90.157.26.245->192.168.0.5 [0]
Mar 13 16:57:56.568: NAT: s=192.168.0.5->90.157.26.245, d=8.8.8.8 [1660]
Mar 13 16:57:56.612: NAT*: s=8.8.8.8, d=90.157.26.245->192.168.0.5 [0]
Mar 13 16:57:56.612: NAT: s=192.168.0.5->90.157.26.245, d=8.8.8.8 [1661]
Mar 13 16:57:56.656: NAT*: s=8.8.8.8, d=90.157.26.245->192.168.0.5 [0]


from client

C:\>ping 8.8.8.8

cisco.k259#
Mar 13 16:58:44.073: NAT*: s=192.168.0.12->90.157.26.245, d=8.8.8.8 [8632]
Mar 13 16:58:48.706: NAT*: s=192.168.0.12->90.157.26.245, d=8.8.8.8 [8633]
Mar 13 16:58:53.706: NAT*: s=192.168.0.12->90.157.26.245, d=8.8.8.8 [8634]
Mar 13 16:58:58.706: NAT*: s=192.168.0.12->90.157.26.245, d=8.8.8.8 [8635]

Highlighted
VIP Mentor

Re: Help me to understand the work of NAT via PPTP

Hello

so to summarise what is failing 



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future
Highlighted
Beginner

Re: Help me to understand the work of NAT via PPTP

The main mystery remains: why do the DNS requests FROM CLIENT pass successfully through NAT, but the PING does not pass?

What is the difference between them?
Highlighted
Beginner

Re: Help me to understand the work of NAT via PPTP

So, gentlemens,, the problem was at CEF.

 

no ip cef

 

Brings NAT to the working state.