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Ubuntu pinging internet but not connecting via GNS 3

hfakoor222
Spotlight
Spotlight

‎06-11-2022 03:55 PM

ping 157.240.3.35

facebook

 

successful

ping 8.8.8.8 success

ping desktop  success

 

 

cant connect internet

 

edge router using nat

 

suggestions?

 

 

 

 

2.png

 

 

Edge Router

 

 

 

 

dge#
Edge#
Edge#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Edge(config)#int f1/0
Edge(config-if)#ip add 10.2.2.2 255.255.255.0
Edge(config-if)#no shut
Edge(config-if)#exit
Edge(config)#
Edge(config)#ex
*Mar 1 01:07:15.811: %LINK-3-UPDOWN: Interface FastEthernet1/0, changed state to up
*Mar 1 01:07:16.811: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet1/0, changed state to up
Edge(config)#exit
Edge#
Edge#
Edge#
Edge#
Edge#
*Mar 1 01:07:18.183: %SYS-5-CONFIG_I: Configured from console by console
Edge#ping 10.2.2.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.2.3, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 8/20/36 ms
Edge#
Edge#
Edge#
Edge#sh run
Building configuration...

Current configuration : 1304 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Edge
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
ip address dhcp
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
interface Serial0/0
no ip address
shutdown
clock rate 2000000
!
interface FastEthernet0/1
ip address 10.1.1.2 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 10.2.2.2 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet2/0
no ip address
shutdown
duplex auto
speed auto
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
ip nat inside source list 1 interface FastEthernet0/0 overload
!
access-list 1 permit any
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0

Edge#sh run
Building configuration...

Current configuration : 1304 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Edge
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
ip address dhcp
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
interface Serial0/0
no ip address
shutdown
clock rate 2000000
!
interface FastEthernet0/1
ip address 10.1.1.2 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 10.2.2.2 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet2/0
no ip address
shutdown
duplex auto
speed auto
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
ip nat inside source list 1 interface FastEthernet0/0 overload
!
access-list 1 permit any
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
!

Edge#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Edge(config)#int f1/0
Edge(config-if)#ip nat inside
Edge(config-if)#
Edge(config-if)#
Edge(config-if)#
Edge(config-if)#
Edge(config-if)#exit
Edge(config)#exit
Edge#
Edge#
Edge#s
*Mar 1 01:11:27.015: %SYS-5-CONFIG_I: Configured from console by console
Edge#sh run
Building configuration...

Current configuration : 1342 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Edge
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
ip address dhcp
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
interface Serial0/0
no ip address
shutdown
clock rate 2000000
!
interface FastEthernet0/1
ip address 10.1.1.2 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 10.2.2.2 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!

Edge#2
Trying 2...
% Destination unreachable; gateway or host down

% Unknown command or computer name, or unable to find computer address
Edge#
Edge#
Edge#
Edge#
Edge#
Edge#ping 10.2.2.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.2.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/10/12 ms
Edge#sh run
Building configuration...

Current configuration : 1342 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Edge
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
ip address dhcp
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
interface Serial0/0
no ip address
shutdown
clock rate 2000000
!
interface FastEthernet0/1
ip address 10.1.1.2 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 10.2.2.2 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!
interface FastEthernet2/0
no ip address
shutdown
duplex auto
speed auto
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
ip nat inside source list 1 interface FastEthernet0/0 overload
!
access-list 1 permit any
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
!
end

Labels:
0 Helpful
4 Replies 4

Flavio Miranda
VIP
VIP

‎06-11-2022 04:17 PM - edited ‎06-11-2022 04:45 PM

Hi

 

"show ip nat translation" on the Edge.

On the ubuntu:

nslookup www.google.com

Add ip name-server on the router pointing to 8.8.8.8.8 

 

 

 

0 Helpful

hfakoor222
Spotlight
Spotlight
In response to Flavio Miranda

‎06-11-2022 08:47 PM

i try

 

 

nslookup www.google.com

 

 

ubuntu reply

 

can't find www.google.com:   SERVFAIl

 

 

0 Helpful

Flavio Miranda
VIP
VIP
In response to hfakoor222

‎06-12-2022 01:59 AM

Seems that you dont have DNS setup.

If Ubuntu is receiving ip from dhcp, add dns as a dhcp option.

Configurre dns on router with

ip name server.

Ubuntu need to resolve name. 

0 Helpful

Georg Pauwen
VIP
VIP

‎06-12-2022 01:09 PM

Hello,

 

your NAT access list currently has 'permit any' configured, which is usually not a good idea.

 

Try the access list below:

 

access-list 1 permit 10.1.1.0 0.0.0.255
access-list 1 permit 10.2.2.0 0.0.0.255

0 Helpful
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