Cisco 837 VPN User access

Posted on 2004-08-25
Last Modified: 2008-01-16
I've a Cisco 837 acting as a VPN server for two Cisco VPN client software and I would like to restric the users to have only access to VPN.
The users I create with "username test password **" have access to VPN and to the router configuration also! I need to restrict them to VPN only authentication.

Is that possible ?
Question by:diegogalletti
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LVL 28

Expert Comment

ID: 11894076
username test privilege 0 password ***
privilege exec level 1 enable

By default you can go to enable mode from privilege level 0. but a normal login puts you at privilege level 1. The 2nd line means that users below level 1 won't have access to the "enable" command. User test will be at level 0 when they authenticate. So when the VPN users authenticate they can't do anything on the router but their traffic can still pass through.

We do this with our router-router ISDN authentication so if someone guesses the password they still won't have router privileges.

Author Comment

ID: 11929346
Thank you I tried it now but no way.
The new user are "username test privilege 0 password..." but they are able to enable with the enable password.
maybe something to change in "privilege exec level 1 enable" ??

LVL 28

Expert Comment

ID: 11932462
No, that should do it. Try telnetting to the router and logging in as user test. Type "show privilege." It shoulnd't even recognize the word "show.". Then try to get into enable mode and it should fail on that too. If you get an answer to show privilege, tell me what it says and also post your config here, minus actual passwords. If you can, just post the output of "show runn | include privilege"
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Author Comment

ID: 11940935
Ok, this is a cut of config:

version 12.3
no service pad
no service timestamps debug uptime
service timestamps log datetime
service password-encryption
hostname IW-837
memory-size iomem 5
logging buffered 32000 informational
no logging console
no logging monitor
enable secret 5 ****************************
username test privilege 0 secret 5 **********************


IW-837>show privi
IW-837>show privi
Current privilege level is 1
IW-837#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
IW-837#sho pri
Current privilege level is 15

Suggestion ??
LVL 28

Accepted Solution

mikebernhardt earned 125 total points
ID: 11943812
I think it's a bug in IOS. In 12.2 mainline it works. But in IOS that has the "secret" feature enhancement for the username command- which includes your 12.3 software, the privilege level argument doesn't seem to work even if you don't use the "secret" argument. I set it both to 0 and to 2, and the router ignores it. I'm actually going to tell Cisco about it, it's definitely a bug.
LVL 28

Expert Comment

ID: 11943854
How do you usually log into the router? Do you use the username command yourself, or something else? I'm wondering if we can create a workaround...

Author Comment

ID: 11950236
the ios is 12.3(7) ! I'm able to access Cisco and update again the ios.
I use ssh to access the router.

What do you think ?

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