57-ccna-nat-sim-question-2.pdf

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CCNA NAT SIM Question 2

July 5th, 2011 Go to comments

Question

Solution

Note: If you are not sure how NAT & PAT work, please read my Network Address Translation NAT Tutorial. You can download a similar sim to practice here: http://www.9tut.com/download/9tut.com_CCNA_NAT_sim_question.zip

The company has 62 hosts that need to access the internet simultaneously but we just have 6 public IP addresses from 198.18.32.65 to 198.18.32.70/29 => we have to use NAT overload (or PAT)

Double click on PC1 to access Router1′s command line interface

Router1>enable Router1#configure terminal

Create a NAT pool of global addresses to be allocated with their netmask (notice that /29 = 248)

Router1(config)#ip nat pool mypool 198.18.32.65 198.18.32.70 netmask 255.255.255.248

Create a standard access control list that permits the addresses that are to be translated

Type text to search here... Submit Query

You work as a network technician at 9tut.com. Study the exhibit carefully. You are required to perform configurations to enable Internet access. The Router ISP has given you six public IP addresses in the 198.18.32.65 198.18.32.70/29 range. 9tut.com has 62 clients that needs to have simultaneous internet access. These local hosts use private IP addresses in the 192.168.6.65 – 192.168.6.126/26 range. You need to configure Router1 using the PC1 console. You have already made basic router configuration. You have also configured the appropriate NAT interfaces; NAT inside and NAT outside respectively. Now you are required to finish the configuration of Router1.

Page 1 of 12CCNA Training » CCNA NAT SIM Question 2

5/27/2013http://www.9tut.com/57-ccna-nat-sim-question-2

Router1(config)#access-list 1 permit 192.168.6.64 0.0.0.63

Establish dynamic source translation, specifying the access list that was defined in the prior step

Router1(config)#ip nat inside source list 1 pool mypool overload

This command translates all source addresses that pass access list 1, which means a source address from 192.168.6.65 to 192.168.6.126, into an address from the pool named mypool (the pool contains addresses from 198.18.32.65 to 198.18.32.70)

Overload keyword allows to map multiple IP addresses to a single registered IP address (many-to-one) by using different ports

The question said that appropriate interfaces have been configured for NAT inside and NAT outside statements.

This is how to configure the NAT inside and NAT outside, just for your understanding:

Router1(config)#interface fa0/0 Router1(config-if)#ip nat inside

Router1(config-if)#exit

Router1(config)#interface s0/0 Router1(config-if)#ip nat outside

Before leaving Router1, you should save the configuration:

Router1(config)#end (or Router1(config-if)#end) Router1#copy running-config startup-config

Check your configuration by going to PC2 and type:

C:\>ping 192.0.2.114

The ping should work well and you will be replied from 192.0.2.114

Other lab-sims on this site:

CCNA Access List Sim

CCNA NAT SIM Question 1

CCNA Frame Relay Sim

CCNA Configuration SIM Question (RIPv2 SIM)

CCNA VTP SIM

CCNA EIGRP LAB



CCNA Drag and Drop SIM

CCNA Implementation SIM

Comments Comment pages « Previous 1 … 7 8 9 35

1. mazhar hussain April 3rd, 2013

please some one send me licenced version of visual_certexam_suite_setup .i m thank full 2 u.my mailing add: [email protected].

2. Zeeshan April 4th, 2013

Mazhar u can download VCE with crack from 4shared, jus click the link. http://www.4shared.com/rar/DtZYr7fc/vce_311.html

3. shuvo_bd April 5th, 2013

passed to day with 947/1000. thanks 9tut and all of the people who was involved. acl2, vtp, eigrp same as 9tut. an extra network was in eigrp. you should apply “no network……” another everything was same. now time for CCNP.

4. Yesudasan April 6th, 2013

is it a must to save the configuration in exam ?? copy run start ?? Pleease reply…

5. Hammam April 9th, 2013

to shuvo_bd :

Would you please expalain exactly how & where to use “no network……” in the eigrp ?

Many thanks in advance

6. SilverStone April 9th, 2013

Shuvo means



there is a phantom network on the Main router better to remove it by using the no network command e.g router eigrp 212 no network 192.168.30.0

it will remove the network 192.168.30.0 to be advertise


SilverStone :

How can i know the exact wrong network ?

Thanks in advance FY feedback

8. Kim Jong-un April 10th, 2013

Harro, sneeky round eye western dogs, i see you trying to cheat on CCNA, I change exam on you all!

9. examtaker April 12th, 2013

@hammam… u have to see 1. the directly connected interfaces on the router by typing “show ip interface brief; then 2. show running-config to see which networks are entered under eigrp solution 1. remove all network addresses that are not directly connected configure terminal router eigrp 10 no network [not directly connected network] network [directly connected network]


@ examtaker : Thanks so much FY help

11. waqmac April 15th, 2013

After permiting in access-list do we have to deny the other traffic because I saw that line in pass4sure question solutions? access-list 1 permit 192.168.16.33 0.0.0.15 access-list 1 deny any ip nat pool mypool 198.18.237.225 198.18.237.230 netmask 255.255.255.248 ip nat inside source list 1 pool mypool overload



Please help

12. jtafur32 April 17th, 2013

Buen dia tengo una duda .

Porque se le da un pool : mypool 198.18.32.65 198.18.32.70 netmask 255.255.255.248 Aqui estamos diciendo que coga de este rango ip publicas para que sirva de traductor alas IPS de la LAN Privada. Cuando se coga cada Ip del Pool traducira dinamicamente:

Por Ejemplo : IP Privada : 192.168.1.65 traducido a 198.18.32.65 (cogido del pool) despues de esta traduccion con que se enlazara si las ip son 192.0.2.13 y 192.0.2.14…los cuales no estan en el rango de MEJOR DICHO NO CONCUERDAN CON EL POOL QUE TRADUCE CADA Ip Privada.

Alguien me explica . Se lo agradeceria muchisimo o capaz yo estoy en un error …gracias.

13. Diogo April 18th, 2013

PASSED YESTERDAY WITH 894/1000 AND I HAD THIS LAB.

@waqmac u dont have to deny, because its already implicit

just permit the network that will be translated, in this case:

access-list 1 permit 192.168.6.64 0.0.0.63

then create the pool: ip nat pool mypool 198.18.32.65 198.18.32.70 netmask 255.255.255.248

and link the list and the pool: ip nat inside source list 1 pool mypool overload

14. Sikandar April 21st, 2013

Need help : how can nating range 198.18.32.65 —>198.18.32.70 work on serial 0/0 with ip 192.0.2.113 translat … totaly differnt range i am configuring as above but nating doesnt work .. ???

15. folakemi April 22nd, 2013

It’s a mistake, use sh run to get the actual IP addresses and use it creat a limited for the outside range.

16. Anonymous



April 23rd, 2013

I hope some contributions are made to these guys? They have been very helpful. Though, I have not contributed, but I look forward to at least give something little to encourage 9tut.

Thanks 9tut

17. Yves April 24th, 2013

When we get the LAB sims on the exam, do we need to write the whole cmd or can we use TAB to see the cmd?

18. SARS April 26th, 2013

Yves no, no te permite usar TAB, asi que lo mejor es que te sepas de memoria los comandos

19. Burhan-u-ddin April 27th, 2013

please i need CCNP dumps if any one have ,, i’ll b grareful ,, if any one could sent it to this email add .. [email protected]

20. Ruhail Pakistan April 27th, 2013

@SilverStone 192.168.6.65/26

access-list 1 permit 192.168.6.64 0.0.0.63

What is the purpose of 0.0.0.63 ???? total addressesof the subnet have to mention, else have to mention the last address of the previous subnet.

e.g 192.168.20.129/26

access-list 1 permit 192.168.20.128 (0.0.0.127 or 0.0.0.63 ) ?????

please guide me dear….

21. CCNA May 3rd, 2013

HI I am Saidul Islam Talukder from Bangladesh, I am thinking to sit CCNA exam. so if any one have CCNA current dump. please send me to the below address [email protected] and it will be great help if any one send me.

Thanks Saidul Islam Talukder.



22. Raaz May 7th, 2013

I applied all commands for NAT but ping from PCs could not be successful

ip nat pool mypool 198.18.184.105 198.18.184.110 netmask 255.255.255.248 access-list 1 permit 192.168.100.17 0.0.0.15 ip nat inside source list 1 pool mypool overload

Interface fa0/0 ip nat inside

interface se0/0 ip nat out

Please help !!

23. iza May 10th, 2013

@Raaz i think you should have used access-list 1 permit 192.168.100.16 0.0.0.15 instead of access-list 1 permit 192.168.100.17 0.0.0.15. notice that 192.168.100.16 is the network address

24. ScttW15 May 17th, 2013

@ Raaz, I agree with iza. When applying an ACL to an interface you have to be careful. If it is for a range of ip’s, you have to use the network address with wildcard mask, if it is for a specific host, you use the host ip.

25. broccoli May 18th, 2013

Hi,

I made this lab but I tried ping to 192.0.2.114, it’s unseccessful. My configuration ise true although not ping. Help please.. I wonder this configuration didn’t run in packet tracer ??

Thanks

26. kk May 20th, 2013

iam writing ccna next week- im still preparing. please send me latest sakhar dumps in pdf. email [email protected]

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To sit for the ccna exam next month and i real need dumps pliz anyone with,send to email:[email protected]. Thanks a lot!!.

28. boddiebt May 22nd, 2013

I took the icnd2 this morning got shocked a lot of simulations . frame-relay, vtp, ospf i can’t remember the rest brain fried it was a total of 5 sims. all were the same as shown on this site, no nat or access-list. Pass4sure questions was an absolute help. I made 970 little disappointed oh well i passed. Good luck everyone.

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thanks IZA n scttw15 ;)

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