CCNA Access List Sim 2
Question
A network associate is adding security to the configuration of the Corp1 router. The user on host C should be able to use a web browser to access financial information from the Finance Web Server. No other hosts from the LAN nor the Core should be able to use a web browser to access this server. Since there are multiple resources for the corporation at this location including other resources on the Finance Web Server, all other traffic should be allowed.
The task is to create and apply a numbered access-list with no more than three statements that will allow ONLY host C web access to the Finance Web Server. No other hosts will have web access to the Finance Web Server. All other traffic is permitted.
Access to the router CLI can be gained by clicking on the appropriate host.
All passwords have been temporarily set to “cisco”.
The Core connection uses an IP address of 198.18.196.65
The computers in the Hosts LAN have been assigned addresses of 192.168.33.1 – 192.168.33.254
Host A 192.168.33.1
Host B 192.168.33.2
Host C 192.168.33.3
Host D 192.168.33.4
The servers in the Server LAN have been assigned addresses of 172.22.242.17 – 172.22.242.30
The Finance Web Server is assigned an IP address of 172.22.242.23.
The Public Web Server is assigned an IP address of 172.22.242.17
Answer and Explanation
(Note: If you are not sure how to use access-list, please check out my access-list tutorial at: http://www.9tut.com/access-list-tutorial, also some modifications about the access-list have been reported so you should read the “Some modifications” section at the end of this question to understand more. You can also download this sim to practice (open with Packet Tracer) here: http://www.9tut.com/download/9tut.com_Access-list_sim2.pkt
Corp1>enable (you may enter “cisco” as it passwords here)
We should create an access-list and apply it to the interface which is connected to the Server LAN because it can filter out traffic from both Sw-2 and Core networks. The Server LAN network has been assigned addresses of 172.22.242.17 – 172.22.242.30 so we can guess the interface connected to them has an IP address of 172.22.242.30 (.30 is the number shown in the figure). Use the “show running-config” command to check which interface has the IP address of 172.22.242.30.
Corp1#show running-config
We learn that interface FastEthernet0/1 is the interface connected to Server LAN network. It is the interface we will apply our access-list (for outbound direction).
Corp1#configure terminal
Our access-list needs to allow host C – 192.168.33.3 to the Finance Web Server 172.22.242.23 via web (port 80)
Corp1(config)#access-list 100 permit tcp host 192.168.33.3 host 172.22.242.23 eq 80
Deny other hosts access to the Finance Web Server via web
Corp1(config)#access-list 100 deny tcp any host 172.22.242.23 eq 80
All other traffic is permitted
Corp1(config)#access-list 100 permit ip any any
Apply this access-list to Fa0/1 interface (outbound direction)
Corp1(config)#interface fa0/1
Corp1(config-if)#ip access-group 100 out
Notice: We have to apply the access-list to Fa0/1 interface (not Fa0/0 interface) so that the access-list can filter traffic coming from both the LAN and the Core networks. If we apply access list to the inbound interface we can only filter traffic from the LAN network.
In the real exam, just click on host C and open its web browser. In the address box type http://172.22.242.23 to check if you are allowed to access Finance Web Server or not. If your configuration is correct then you can access it.
Click on other hosts (A, B and D) and check to make sure you can’t access Finance Web Server from these hosts.
Finally, save the configuration
Corp1(config-if)#end
Corp1#copy running-config startup-config
(This configuration only prevents hosts from accessing Finance Web Server via web but if this server supports other traffic – like FTP, SMTP… then other hosts can access it, too.)
Notice: In the real exam, you might be asked to allow other host (A, B or D) to access the Finance Web Server so please read the requirement carefully.
Some modifications:
Modification 1:
| permit host B from accessing finance server | access-list 100 permit ip host 192.168.33.2 host 172.22.242.23 |
| deny host B from accessing other servers (not the whole network) | access-list 100 deny ip host 192.168.33.2 172.22.242.16 0.0.0.15 |
| permit everything else | access-list 100 permit ip any any |
Modification 2:
| Only allow Host C to to access the financial server | access-list 100 permit ip host 192.168.33.3 host 172.22.242.23 |
| Not allow anyone else in any way communicate with the financial server | access-list 100 deny ip any host 172.22.242.23 |
| Allow all other traffic | access-list 100 permit ip any any |
Modification 3:
| - Host C should be able to use a web browser(HTTP)to access the Finance Web Server | access-list 100 permit tcp host 192.168.33.3 host 172.22.242.23 eq 80 |
| - Other types of access from host C to the Finance Web Server should be blocked - All access from hosts in the Core or local LAN to the Finance Web Server should be blocked |
access-list 100 deny ip any host 172.22.242.23 (because the requirement says we can not use more than 3 statements so we have to use “any” here for the hosts in the Core and hosts in local LAN) |
| - All hosts in the Core and local LAN should be able to access the Public Web Server * | access-list 100 permit ip any host (If the question asks this, surely it has to give you the IP of Public Web Server) but in the exam you should use “access-list 100 permit ip any any” |
Modification 4:
| Host C should be able to use a web browser to access the financial web server | access-list 100 permit tcp host 192.168.33.3 host 172.22.242.23 eq 80 |
| Other types of access from host C to the finance web server should be blocked | access-list 100 deny ip host 192.168.33.3 host 172.22.242.23 |
| All hosts in the core and on the local LAN should be able to access the Public web server * | access-list 100 permit ip any host (The IP of Public Web Server will surely be given in this question) but in the exam you should use “access-list 100 permit ip any any” |
* There are some reports about the command of “All hosts in the core and on the local LAN should be able to access the Public web server” saying that the correct command should be “access-list 100 permit ip any any”, not “access-list 100 permit ip any host (IP of Public Web Server)”. Although I believe the second command is better but maybe you should use the first command “access-list 100 permit ip any any” instead as some reports said they got 100% when using this command (even if the question gives you the IP address of Public Web Server). It is a bug in this sim.
(Note: Don’t forget to apply this access list to the suitable interface or you will lose points
interface fa0/1
ip access-group 100 out
And in the exam, they may slightly change the requirements, for example host A, host B instead of host C… so make sure you read the requirement carefully and use the access-list correctly)
I created this sim in Packet Tracer v5.2.1 so you can practice with it. You will need new version of Packet Tracer to open it (v5.1+).
Download this sim here
Notice: After typing the commands above, if you make a “ping” from other hosts (PC0, PC1, PC3) then PC4 (Finance Web Server) can still reply because we just filter HTTP traffic, not ICMP traffic. To generate HTTP traffic, select “Web Browser” in the “Desktop” tab of these PCs. When a web browser opens, type the IP address of Finance Web Server and you can see how traffic flows in Simulation Mode.
And notice that in the initial configuration of this sim the Core network can ping Finance Web Server. We have to create an access-list that can filter this traffic too.
Other lab-sims on this site:
Today I passed my CCNA 972/1000. Thanks to 9 TUT and thanks a lot to Swasktik who shared this site information with me.
All the dumps are valid and 9tut material is more than Enough to get your ccna certification.
Above all thanks almighty for helping me out.
Ajay
today i passed the CCNA got 1000/1000…. thanks to 9tut…. all questions and simulation are from 9tut dumps….
Passed yesterday!!! Thank you 9tut!!! My labs were ACL,EIGRP and modification ACL2.
ACL2:
The task is to create and apply a numbered access-list with no more than three statements that will allow ONLY host A web access to the Finance Web Server. No other hosts will have access to the Finance Web Server. All host from local and Core network will have access to the Public web server.
Pass Today !!!! 958….Thanks for the 9tut Team. ACL,EIGRP and modification ACL2.
Passed this morning 13.03.2015 with 931. ACL1, ACL2 (mod3), EIGRP and 2 drag and drop questions. Thanks!!!
Passes today.. 931.. I messed up only this question.. I made a typing mistake in the acl entry.. So my acl had four commands.. When I tried to remove the wrong access from the acl using the “no acces-list… “; it said this version doesn’t support the no command.. I had no idea how to make corrections otherwise.. I tried copy start run to get my initial configuration but even that did not help.. Can someone tell how to resolve this
Modification 1:
deny host B from accessing other servers (not the whole network)
access-list 100 deny ip host 192.168.33.2 172.22.242.16 0.0.0.15
=kindly please tel me where did they get this ip 172.22.242.16 0.0.0.15
_thanks in advance!
@ayah
as mentioned in given detail:
The servers in the Server LAN have been assigned addresses of 172.22.242.17 – 172.22.242.30
means network ip is 172.22.242.16 and by applying show running-config we came to now these datails:
ip address172.22.242.30 255.255.255.40
wo by using this, we got wildcard mask : 0.0.0.15
Thats it :)
Passed today March 14, 2015. 972/1000. Thank you 9tut.
Sim : EIGRP, ACL 1, 2 (modification 3). 100% valid!
Pls can someone tell me if the modifications are the same as reported includono the
commands! !!! Getting the exam in two weeks! !!
Hi guys,
I passed CCNA exam on March 13th. My labs ware ACL2, ACL, EIGRP.
Thanks 9tut, watson, konrad
9tut, konrad y watson son 100% recomendados para certificarse. 1000/1000. EIGRP y una modificación de ACL2, muy similar a la que esta arriba.
Gracias
Jay Shreeram boys _/\_
By Grace of Almighty Allah, i have successfully cleared CCNA exam today.Thanks to 9tut who provides a platform that makes labs so much easy to understand and t.shoot it.Labs were ACL1, ACL 2 with modification 3 as mentioned in acl lab page. and eigrp 212.
the exam looks like that tutorial…. http://www.cisco.com/web/learning/wwtraining/certprog/training/cert_exam_tutorial.html
total questions are 51 ..
Dont forget to save lab (copy running-config startup-config)
best way is ask for rough work board as it will be provoded .. before solving any lab write down configs that are required on rough work before typing on PC
thanks
Thank you Mohsin.k for the above link.
v
guys do i have to study only the pink lab before the exam.
l7amdellah i have passed the CCNA exam in with score 1000/1000 point it was very easy,questions from watson dumps and the new questions you can find it from 9tut new questions or from konrad 338q dumps questions from selected sections and choose New, Sim&Labs ACL1&ACL2 ( Modification 3 ) and EIGRP AS 23 instead 22.
I passed CCNA with 972 marks. You can download my dums from bellow link
http://www.4shared.com/office/bUPx9Kn_ce/200-120-New.html
Best of Luck
Passed my CCNA exam today (18th Mar)… this Q is in exam
to AYAH…
The servers assigned addresses of 172.22.242.17 – 172.22.242.30
so it belong to network 172.22.242.16 and by applying show running-config on the SIM u can see datails:
ip address172.22.242.30 255.255.255.240
255.255.255.255
255.255.255.240 =15
……………………..
therefore u will have this 172.22.242.23 0.0.0.15 (as wildcard mask)
passed exam today 986/1000… thanks much 9tut… no need for any other dumps… all here…
ACL,ACL2 and EIGRP… the best…
hi everyone… can anyone tell me how the ip’s chaning in exam please…
Hi Sir/Ma’am Can some send me CCNA 200-120 latest dump. Please sir/ma’am :( Here’s my email account
mogiemalik@yahoo.com.ph
please,I need the commands to deny a single host from using http to access the Finance Web Server.Permit any other host.thanks
valid but failed by four points :( will retake april7
I Passed 13.03.2015, with 945/1000
thanks much 9tut…
My labs ware ACL2, ACL, EIGRP as 22
ONLY PAID WORK !!!!!!
I passed 13.03.2015.all was the same.ACL1 ACL2 and EIGRP.Thanks 9tut.dump here and will make it.958 score.
Hi all,
I passed the exam, You only need Watson dumps, new question here in 9tut and the simulation EIGRP simulation ACL 1 and ACL 2. Thanks to 9tut I just killed the ccna exam. Goodluck to all future examiners. The exam was easy just scored 986/1000 I only got 1 wrong line in the configuration of ACL 2…
Today 23/03 I passed my CCNA 890/1000. And all this thanks to 9 TUT.
You guys are doing an awesome job here helping out network professionals to further our career paths thanks again and keep it up.
ACL SIM 2 on the exam and most of the questions here on this page
I Passed 24.03.2015, with 917/1000
thanks u SO much 9tut…
My labs ware ACL2, ACL, EIGRP as 22
Jst lyk 2 undrstnd ds ACL lab cn any1 do it 4 me plz im takn my exam nxt wek
acl2&acl1,EIGRP in yesterday exam
According to the Senario:
The Finance Web Server is assigned an IP address of 172.22.242.23.
The Public Web Server is assigned an IP address of 172.22.242.17
But Answers:
Our access-list needs to allow host C – 192.168.33.3 to the “Finance Web Server 172.22.242.23″ via web (port 80)
Corp1(config)#access-list 100 permit tcp host 192.168.33.3 host 172.22.242.23 eq 80
I hope host IP have to be 172.22.242.17.
Let me know guys!!
I’m goinf to do exam on tomorrow.
No No Answer is perfectly alight. I apologise guys.
I passed 3-25-15, with 968/1000.
-ACL, ACL2 mod2 and EIGRP.
Thanks 9tut!
thank you so much 9tut. I passed the exam today. i hv scored 972.
short command was worked.
” ? ” mark also worked. According to my knowledge it is depend on the examination centre software version. wen i read 9tut foram, some of them said it is not worked. but wen i doing my exam it actually worked.
anyway good luck guys. once again thank you somuch 9tut.
I just passed!
ACL,ACL2 and EIGRP-Modification 3.
what about ac2 mod 3
the 3rd line
access-list 100 permit ip any host 172.22.242.17
or
access-list 100 permit ip any any
i am convinced with the first choice but anyone who passed the exam can tell me which one i should choose
Please help me i can’t understand Modification 3 & 4 question that is same but command different :
Modification 3:
Other types of access from host C to the Finance Web Server should be blocked
Modification 4:
Other types of access from host C to the finance web server should be blocked
mod3 line 2 … see there
anyone from London who passed? are they still valid?
Acl2 mod 3 was on my exam today but I couldn’t do it because I their devise did support access list 100 but and instead it was access expression every command I put it in with access list failed so I skip it and fail the exam. Anyone had that issues and kn how to configure that with the acces expression Never saw before today please help I want to take the test again
@Sonia I don’t understand what is acces expression ?
At no have 92, that’s the same thing I was thinking I Google it and it has something to do with Microsoft I don’t if it was a mistake with the test center devices configuration or something like that I was lost
ALHAMDOLILLAH passed exam lab was acl,acl 2 mod 4
Passed the exam with flying colours 9tut does well
EIGRP 212
ACL MOD 3
VLAN Trunking
ACL
STP
Switching
Netflow
SNMP
Subnetting
Basically all the questions where here besides 4 new questions. You guys will be fine just practise these questions to get a good understanding of what CCNA is about. Make sure you understand what each section is about e.g. frame-relay, WAN, etc etc.
Because at the end of the day you can pass the exam but wont understand j@ck Sh!t about what networking is all about.
Still valid in London?
Yes
Passed with 1000/1000 yesterday. 10Q 9tut and watson dump.Guys the name and the position of z routers are changed on eigrp lab, the names like servers,hub