Solved

ASA5510 - Block AIM on one vlan/network

Posted on 2010-09-15
4
854 Views
Last Modified: 2012-05-10
Hello,

I have an ASA5510 with ssm-10. I need to block AIM on one of my vlans/networks.

I found this example:
http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a00808c38a6.shtml#config2

How do I modify this to only block AIM traffic on one vlan or network.

Two networks: 10.1.103.0 /24 and 10.1.104.0 /24.

Thanks!
0
Comment
Question by:DAgent
  • 2
4 Comments
 
LVL 33

Expert Comment

by:MikeKane
ID: 33686525
Honestly, I didn't think people still used AIM....   but I digress.

IIRC AIM uses TCP/UCP 5190 to 5193   so we just need to create an access list to block those ports and you should be good....  

access-list inside-out deny tcp 10.1.103.0 255.255.255.0 any eq 5190
access-list inside-out deny tcp 10.1.103.0 255.255.255.0 any eq 5191
access-list inside-out deny tcp 10.1.103.0 255.255.255.0 any eq 5192
access-list inside-out deny tcp 10.1.103.0 255.255.255.0 any eq 5193
access-list inside-out deny ucp 10.1.103.0 255.255.255.0 any eq 5190
access-list inside-out deny ucp 10.1.103.0 255.255.255.0 any eq 5191
access-list inside-out deny ucp 10.1.103.0 255.255.255.0 any eq 5192
access-list inside-out deny ucp 10.1.103.0 255.255.255.0 any eq 5193
access-list inside-out permit ip any any
access-group inside-out in interface inside

That will block the 10.1.103.0 network from communicating outbound on the AIM ports.
0
 
LVL 33

Expert Comment

by:MikeKane
ID: 33686529
Oops>
IIRC AIM uses TCP/UCP 5190 to 5193
should be
IIRC AIM uses TCP/UDP 5190 to 5193
0
 

Expert Comment

by:snfink
ID: 33773915
I would take it a step further and block the login servers outright, or if that vlan doesn't need access to AOL a better solution would be to block the entire ip range of 205.188.0.0 - 205.188.255.255 which belongs to AOL. Blocking the ports can work well if they have no access If they have access, they can get in and change the port number that AIM connects on. AIM itself will port hop until it finds one it can connect on. I've seen it running on both ports 21 and 23 for instance. Also, blocking the login servers or the ip range will also block them from using the web version of Aim.

login servers are
login.oscar.aol.com (64.12.202.116)
login.oscar.aol.com:443 (64.12.202.116)
toc.oscar.aol.com (64.12.202.14)
aimexpress.aim.com (207.200.74.38)

So you can do something like

object-group network AOL
 description Block AOL and AIM
 network-object host 64.12.202.116
 network-object host 207.200.74.38
 network-object host 205.188.0.0

this creates a group name that is associated with the ip's listed, and then you can just block the group name to keep your rules nice and tidy on the 5510.

Depending on the network/vlan name you can just add it via the CLI or the ASDM.

CLI command would look something like this

access-list (VLAN NAME)-IN extended deny tcp 10.1.103.0 255.255.255.0 object-group AOL log critical
0
 
LVL 1

Accepted Solution

by:
DAgent earned 0 total points
ID: 33916091
I used this so I can block by URL:

http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a0080940e04.shtml

This way I can web sites and chat programs in one location.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Sonicwall will not export settings 4 67
DHCP on ASA 3 53
CCNA Data center exam questions 8 82
Set up wireless network on Cisco ASA 5505 with DHCP 13 53
Have you experienced traffic destined through a Cisco ASA firewall disappears and you do not know if the traffic stops in the firewall or somewhere else? The solution is the capture feature. This feature was released in 6.2(1) and works in all firew…
I recently updated from an old PIX platform to the new ASA platform.  While upgrading, I was tremendously confused about how the VPN and AnyConnect licensing works.  It turns out that the ASA has 3 different VPN licensing schemes. "site-to-site" …
Both in life and business – not all partnerships are created equal. As the demand for cloud services increases, so do the number of self-proclaimed cloud partners. Asking the right questions up front in the partnership, will enable both parties …
Both in life and business – not all partnerships are created equal. Spend 30 short minutes with us to learn:   • Key questions to ask when considering a partnership to accelerate your business into the cloud • Pitfalls and mistakes other partners…

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now