Solved

SNMP 2c over site to site VPN Cisco ASA 5505

Posted on 2014-04-16
4
2,715 Views
Last Modified: 2014-04-17
Hello,

Have Cisco ASA 5505 running IOS  9.1.3.  Have site to site VPN between that ASA and main office.  At main office have Solar Winds Device Tracker server  which monitors network equipment via SNMP.  SNMP server is on 192.168.0.0 /24 network.  Remote ASA is on 192.168.113.0 /24 network.  Have crypto maps and Before Nat rules to allow the two inside networks to communicate.  That works fine.  Different devices can ping and communicate.  But if I try to get the SNMP server to talk to the remote ASA 192.168.113.1, I get this in the remote ASA log:

"Failed to locate egress interface for UDP from outside 192.168.0.77/51777 to 192.168.113.1/161"

I have set up management rules to allow SNMP traffic from 192.168.0.77, but no dice.

I want the SNMP traffic to go across the encrypted VPN tunnel.  Is this possible?  If so what do I need to add to allow this communication?
0
Comment
Question by:ckangas7
  • 2
4 Comments
 
LVL 25

Expert Comment

by:Fred Marshall
ID: 40005399
I don't see why SNMP traffic should be any different than others unless you have it encrypted perhaps.  For example, some of the devices/software expect you to be able to access the information and controls from the outside.  In that case you'd want it secured.
If that's not the case then you should be able to do what you describe.
0
 
LVL 20

Accepted Solution

by:
rauenpc earned 500 total points
ID: 40006504
Under your inside interface policy map, do you have "inspect snmp"? Did you define a management interface via the command "management-access inside" ?
Also, the nat exemption statement may need to have the "route-lookup" option applied/selected.

I have this same situation where an SNMP server is pulling stats from an ASA on a site to site tunnel, and it works fine so I know this is doable.
0
 

Author Comment

by:ckangas7
ID: 40007159
You are correct.  I had to enable management-access inside and use the route-lookup option on the NAT rule.  Of course had to add my SNMP server to the SNMP host access list as well.  Seemed to work fine with SNMP inspect disabled, but probably a good idea to turn it on for security.  

Thanks much!!!
0
 

Author Closing Comment

by:ckangas7
ID: 40007160
Thank you.
0

Featured Post

Zoho SalesIQ

Hassle-free live chat software re-imagined for business growth. 2 users, always free.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Secure Connection Failed - Sonicwall FW 1 49
Cisco Router help 5 50
Cisco ASA inside & outside to same switch 3 37
network error 8 32
Network traffic routing plays key role in your network, if you have single site with heavy browsing or multiple sites, replicating important application data from your Primary Default Gateway ,you have to route your other network traffic from your p…
This article offers some helpful and general tips for safe browsing and online shopping. It offers simple and manageable procedures that help to ensure the safety of one's personal information and the security of any devices.
This video shows how to remove a single email address from the Outlook 2010 Auto Suggestion memory. NOTE: For Outlook 2016 and 2013 perform the exact same steps. Open a new email: Click the New email button in Outlook. Start typing the address: …
A short film showing how OnPage and Connectwise integration works.

948 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

22 Experts available now in Live!

Get 1:1 Help Now