NAT

[emilio1973]

Hi all,

I have a problem and i don't know how to solve it. I need all requests arriving on the WAN interface of R2  with 22,80.800 and 843 ports are redirected to the address 192.168.0.91. Here is my  configuration and topology:

access-list 110 permit tcp any host 213.190.2.182 eq 22
access-list 110 permit tcp any host 213.190.2.182 eq www
access-list 110 permit tcp any host 213.190.2.182 eq 800
access-list 110 permit tcp any host 213.190.2.182 eq 843

ip nat outside source static 213.190.2.182 192.168.0.91

interface FastEthernet0/0
ip address 192.168.0.2 255.255.255.128 secondary
ip address 192.168.1.30 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex half
speed auto

!

!

interface GigabitEthernet1/0
ip address 213.190.2.182 255.255.255.0
ip nat outside
ip virtual-reassembly
negotiation auto

when I type the command "sh  ip nat translations", this is the result:

Pro Inside global      Inside local       Outside local      Outside global
--- ---                ---                192.168.0.91       213.190.2.182

Anyone  know what I'm doing wrong?

Thanks

[emilio1973]

the R2 config now:

interface FastEthernet0/0
ip address 192.168.0.2 255.255.255.128 secondary
ip address 192.168.1.30 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex half
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface GigabitEthernet1/0
ip address 213.190.2.182 255.255.255.0
ip access-group 110 in
ip nat outside
ip virtual-reassembly
negotiation auto
!
interface GigabitEthernet2/0
no ip address
shutdown
negotiation auto
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ip nat inside source static tcp 192.168.0.91 843 interface GigabitEthernet1/0 843
ip nat inside source static tcp 192.168.0.91 800 interface GigabitEthernet1/0 800
ip nat inside source static tcp 192.168.0.91 80 interface GigabitEthernet1/0 80
ip nat inside source static tcp 192.168.0.91 22 interface GigabitEthernet1/0 22
!
access-list 110 permit icmp any host 213.190.2.182
access-list 110 permit tcp any host 213.190.2.182 eq 22
access-list 110 permit tcp any host 213.190.2.182 eq www
access-list 110 permit tcp any host 213.190.2.182 eq 800
access-list 110 permit tcp any host 213.190.2.182 eq 843
!

[emilio1973]

Hi Halijenn,

I'm  so sorry but I was wrong with my topology and I could not explain to me  what I needed. Fisrt, i was not understood well the secondary ip feature. Second, only  needed a NAT ip LAN to WAN IP and map the ports 22, 80, 800 and 843 to  the ip 192.168.0.91 which is the gateway 192.168.0.2 secondary ip. Three, did not need the access list. Sorry  to waste your time, I appreciate your help as they can see I was wrong. Add tehe right topology and config.

Thanks

[Jennifer Halim]

I don't think you can connect 2 routers with 1 router using the primary ip address to connect to another router using the secondary ip address in the same subnet.

Currently on R1 (fa0/0) primary address is 192.168.0.91, and R2 (fa0/0) primary address is 192.168.1.30 - they are not in the same subnet. Both primary addresses need to be in the same subnet, then you can configure secondary addresses as follows:

On R1:

interface fa0/0

     ip address 192.168.0.91 255.255.255.0

     ip address 192.168.1.31 255.255.255.0 secondary

On R2:

interface fa0/0

     ip address 192.168.0.2 255.255.255.0

     ip address 192.168.1.30 255.255.255.0 secondary

[emilio1973]

Hi,

ok, I think that I have not explained well. R1 is a server that must be accessible  only by attacking the ports 22, 80, 800 and 843. The configuration is as follows:

interface FastEthernet0/0

ip address 192.168.0.2 255.255.255.128 secondary

ip address 192.168.1.30 255.255.255.0

no ip redirects

no ip proxy-arp

ip nat inside

speed 100

full-duplex

!

interface Serial0/0:0

bandwidth 2048

ip address 213.190.2.182 255.255.255.252

no ip redirects

no ip proxy-arp

ip nat outside

encapsulation ppp

load-interval 30

no fair-queue

serial restart-delay 0

no cdp enable

!

ip nat inside source static tcp 192.168.0.91 843 interface Serial0/0:0 843

ip nat inside source static tcp 192.168.0.91 800 interface Serial0/0:0 800

ip nat inside source static tcp 192.168.0.91 80 interface Serial0/0:0 80

Do you think this is the most appropriate to do so or is  there another?

Thanks

[Jennifer Halim]

The static nat statements are correct, but as advised earlier, the ip addressing configured on the router is not correct.

Both R1 and R2 needs to have primary ip address in the same subnet.

[emilio1973]

Hi,

We are experiencing low speed problems in this router  and are starting to think that may be due to not being properly  implemented feature secondary ip.

Add our topoloy; apparently is working correctly and our client  receives no delays or packet loss. Do you think it may be due to the  design of the network? Does anyone believe they could improve?