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ASA 5505 - Internet connection randomly goes down

Posted on 2014-11-18
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Last Modified: 2014-11-23
I have a 5505 in a small office and everything works well except for a few times a day the office will lose the internet connection then it will come up a few seconds later. It happens randomly a few times a day. For testing when a user is directly plugged into the ISP modem this never happened. We even replaced the 5505 with another one and the problem returned. How can I see when and possibly why this is happening? I am not inspecting http traffic and the pings time are really good to and from this asa to the main office.
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Question by:tolinrome
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7 Comments
 
LVL 97

Expert Comment

by:John Hurst
ID: 40449852
I use Cisco but not that model. Have you tried updating the firmware in the Cisco router?  Is it being overloaded with requests and traffic.
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LVL 5

Expert Comment

by:A Karelin
ID: 40450029
I agree John. Try to change ios. We have some problem with Internet connection and vpns and we are going to change ios to another version.
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LVL 7

Author Comment

by:tolinrome
ID: 40450145
ios is very updated, not overloaded with requests at all, great hardware specs, etc.
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LVL 97

Expert Comment

by:John Hurst
ID: 40450185
For testing when a user is directly plugged into the ISP modem this never happened

So it is not the ISP according to the above.

Try a hard reset of the ASA 5505 to factory specifications and do a minimal setup. Test this.

Do you have an AC power supply issue (erratic, insufficient, or too high voltage). Is the enough current capacity to power everything.
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LVL 4

Expert Comment

by:bominthu
ID: 40450232
If it happens few times a day, should be easy to troubleshoot.
I would suggest to enable logging in ASA.
Configure to send logs to local SNMP server

When user says internet down, troubleshoot one by one.
1. Ping FW inside IP from user machine - ?
2. Ping from different machine - ?
If 1, 2 fail, connect FW inside interface directly to your laptop and ping.
If you can ping directly from your laptop, then access CLI, ping 8.8.8.8 from console
From above few steps, at least you can be closer to find out the root cause.
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LVL 7

Accepted Solution

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tolinrome earned 0 total points
ID: 40450609
Looks like its the vpn peer ip in the tunnel.
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LVL 7

Author Closing Comment

by:tolinrome
ID: 40460429
Looks like its the vpn peer ip in the tunnel.
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