Cisco :: NTP Authentication On 3750
Oct 31, 2011
Trying to apply NTP authentication to 3750 switches (layer-2 WS-C3750-24P switches) but they don't wont to work. Applying the same config to any router or 4500/6500 chassis, and NTP authenticates straight away. NTP without authentication works fine on 3750s as well...
ntp authentication-key 1 md5 <key>
ntp authenticate
ntp trusted-key 1
ntp server 10.200.11.200 key 1
Is there additional config required for 3750s? This is across different IOS versions, so doesn't look like a bug..
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Jan 18, 2010
I have 3750 switch (WS-C3750G-24TS-S1U) with IP Services version
Switch Ports Model SW Version SW Image------ ----- ----- ---------- ----------* 1 28 WS-C3750G-24TS-1U 12.2(46)SE C3750-IPSERVICESK9-M
on the switch, I have configured aaa new-modelaaa authentication dot1x default group radius dot1x system-auth-control but i am not able to implement the command under interface
Switch(config)#int gigabitEthernet 1/0/20Switch(config-if)#do?down-when-looped
dot1x commands are not available under the interface config. Is the IOS version is compatible with dot1x?
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Oct 6, 2009
I configured dot1x port-authentication on a 3750. The switch sends out a request to the radius server. The radius server sends a answer-packet to the switch udp port 21645 but it seems the switch discards the packet or something like that. The radius server gets the answer "Destination unreachable, Port Unreachable"
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Dec 29, 2011
I have a customer who used to own a 3750 with a older version of IOS. The switch he had used a three year old version of IOS which allowed him to browse to the switch IP and manage it via HTTP without entering a password at all. Now that he has a replacement switch with a new ver of IOS (since the previous switch died). We slapped the config on from the old switch but no matter what we do (understanding that new http aaa authentication commands were added) we cant get this thing to let him in without prompting him for a password. I understand this was an insecure config to begin with so I shouldn't be advocating using it in the first place, but this is what the customer wants.Basically what I'm trying to figure out is are we banging our heads into the wall for nothing as the "ip http server" will not allow an authentication method of "none" anyway? None of the offical documentation I have read for the http aaa authentication cmds shows this as an example nor have I found any blog posts on how to do it ether. Perhaps Cisco removed this by design.
Here is the config:
aaa new model
aaa authentication login default local
aaa authentication enable default none
aaa authentication login none none
ip http server
ip http authentication aaa login-authentication none
[code]....
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Sep 12, 2012
Cisco 3750 with IP Service Image 12.2.55, Trying to enable Web Authentication on Layer 3 interface:
!
ip auth-proxy name bp_auth_proxy http inactivity-time 60
!
interface GigabitEthernet1/0/5
no switchport
ip address 192.168.1.27 255.255.255.0
ip access-group 101 in
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Mar 29, 2011
I would like to make a centralized management of loggin account on my cisco switch (with a radius server). But, on Cisco 3750 E, i use 12.2(44) SE1 IOS and no command aaa authentication login exist.
Cisco 3750 can support other IOS than 12.2 who have this ability ?
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Aug 10, 2009
I'm experiencing some problems with AAA authentication banners and banner logins.I'm trying to use spaces and empty lines, but when login, all the lines are after each other, no empty lines, no spaces.The problem appears on a 3750 with IOS version 12.2(5)SE2.
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Sep 19, 2012
We are setting up a new office and I am trying to get RADIUS setup for authentication to my switches and routers. Currently I am working on a 3750 running IOS 15 and getting hung on what I think on something small. I have attached my Microsoft NPS Network Policy. Below is my IOS config:
aaa group server radius corp-radius
server 10.15.10.20 auth-port 1812 acct-port 1813
!
aaa authentication login default group corp-radius local
aaa authentication login radius-localfallback group corp-radius enable
aaa authorization exec default group radius
[code]....
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Dec 21, 2009
i tried to create a customized web-authentication page that will re-direct any user to the web-page once they are connected to the network.
The problem is, i just cant attach/upload the image of the logo into the customized web-page (welcome/login page).Been researching about it, found and tried some clue bout it on cisco documentation, but still can't solve the problem.
Cisco document :Catalyst 3750 Switch Software Configuration GuideCisco IOS Release 12.2(52)SESeptember 2009
switch version :WS-C3750-48TS
show flash :2 -rwx 12305677 Mar 1 1993 01:27:03 +00:00 c3750-ipservicesk9-mz.122-52.SE.bin3 -rwx 131 Mar 1 1993 00:17:25 +00:00 log.text5 -rwx 3254 Mar 1 1993 00:01:01 +00:00 config.old8 -rwx 113 Mar 1 1993 03:24:33 +00:00 pass.htm9 -rwx 1088 Mar 1 1993 03:39:18 +00:00 login.htm10 -rwx 113 Mar 1 1993 03:21:30 +00:00 fail.htm11 -rwx 104 Mar 1 1993 03:25:32 +00:00 expire.htm12 -rwx 856 Mar 1 1993 00:05:19 +00:00 vlan.dat14 -rwx 2479 Mar 1 1993 01:25:05 +00:00 web_auth_logo.jpg16 -rwx 1048 Mar 1 1993 00:01:01 +00:00 multiple-fs27 -rwx 1053 Mar 1 1993 02:18:34 +00:00 webauthpage.html38 -rwx 6551 Mar 1 1993 01:19:33 +00:00 logotest.html
following is my running configuration :Building configuration...
Current configuration : 4205 bytes!version 12.2no service padservice timestamps debug datetime msecservice timestamps log datetime msecno service password-encryption!hostname Switch!boot-start-markerboot-end-marker!!!!aaa new-model!!aaa authentication login default group radiusaaa authentication login line-console noneaaa authentication dot1x default group radiusaaa authorization auth-proxy default group radius!!!aaa session-id commonswitch 1 provision ws-c3750-48tssystem mtu routing 1500authentication mac-move permitip subnet-zeroip
[code]....
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Jul 25, 2011
We have a Catalyst 3750 switch that failed over to local login after the Tacacs authentication stopped working. I went through the configuration settings and everything appears to be identical to another switch in this same building.
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Jun 30, 2012
Do I need the Universal image to perform stftp on a 3750 or 3750-X?
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Oct 10, 2011
I'm looking at adding a Cisco 3750-X switch running c3750e-universalk9-mz.122-55.SE1 (IP base license) into a stack of 3750-G switches running c3750-ipbasek9-mz.122-55.SE1.bin Given that the version and feature sets are the same I don't forsee any compatibility issues. Would there be any reason why a universal image wouldn't stack correctly with other switches running the single .bin file?
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May 21, 2012
We have a stack of switches that is at the max number of members allowed in the stack. Problem is we are running out of port density and need to add more ports. So instead of adding a whole new stack I would rather replace 2 of the 24-port swicthes with 48-port switches.
If the two 24-port swicthes we are removing are stack members and neither of them are the stack master, I should be able to replace the 24-port switches with the 48-port switches without bringing the master offline? If the new 48-port switches are running the same IOS version as the current 24-port swicthes, they should add themselves to the stack?Would I have to tell the new 48-port swicthes what switch numbers they are replacing in order for them to be added to the stack since we are at the max number of members?Also since the 48-port swicthes are replacing 24-port switches will the master give the 48-port switches the configuration for only the 24-ports?
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Jun 27, 2012
how many of you use 802.1x for authenticating users on a wired LAN. We have a new site which supports a ton of users and before implementing an RA VPN solution for them I was thinking about using 802.1x to ensure they've got proper credentials before they're put on the production VLAN.
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Feb 2, 2011
how can I config Auth-proxy In ACS 4.0 in ACS 3.3 we can Add this in the Interface , but I can't see any thing for Add Auth-proxy in This menu
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May 20, 2011
Currently working on Proxy Authentication on a catalyst 3750GCisco's documentation says that I can customize my own web pages for the login, success, failure, and expire web pages. However, I am having a difficult time finding a template to build upon.
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Oct 13, 2011
Just a sanity check, but setting up NTP authetication on our switches to sync with our Core first, then our NTP server that the Core syncs to second.
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Feb 20, 2012
I have a access point model WAP4410N , I want to configure for mac authentication by using MS IAS , but when I set MY SSID to radius in wireless connection control and try to connect to that SSID by a laptop I didn't get any logs in my IAS. My methods for radius mac authentication is correct or not ?
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Feb 2, 2012
In order to restrict access to websites on our internal network, would we be able to put an ASA in front of the web server and force users to authenticate through the ASA and, once authenticated, allow only port 80 or 443 traffic for that use? The ASA would query the ACS 5.1 server for authentication/authorization using AD as the identity store. Is this even possible with TACACS?
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Apr 1, 2012
My customer has a large installed base of MACs, all connected via controller-based (5508) WLAN. He wants to grant access to the network based on the device's mac addresses and move the WLAN-clients to a specific VLAN.I added all devices with their mac addresses to the ACS internal identity store for hosts.According to the following message the client sends the user-login credentials (chegger) within the RADIUS-request instead of the clients mac address and of course it has to fail. After many configuration changes, I ended up always with the same result.
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Feb 21, 2012
I have set up an ACS (5.2) to do EAP-TLS Machine and User Authentication.I am getting intermittent results with the machine authentication using the same laptop as a test client.When the machine authentication succeeds the RADIUS name shows as host/xxx-yyy.When the machine authentication fails the RADIUS name shows as xxx-yyy without the host/.
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Feb 26, 2012
I need to order a CISCO881, only CISCO881-K9 is available.I checked everywhere, still not sure if it is enough for me. We used to buy Sec-K9.I've got an adsl modem in bridgemode in the front. As only 1 IP provided by ISP, I need 881 to be able to pass on the PPP authentication.I also need the router to have vpn server function.Could CISCO881-K9 do this or not?
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Jun 13, 2012
I have question on EAP-TLS with ACS 5.2. If I would like to implement the EAP-TLS with Microsoft CA, how will the machine and user authentication take place? Understand that the cert are required on both client and server end, but is this certificate ties to the machine or ties to individual user?
If ties to user, and I have a shared PC which login by few users, is that mean every user account will have their own certificates?
And every individual user will have to manually get the cert from CA? is there any other method as my environment has more than 3000 PCs.
And also if it ties to user, all user can get their cert from CA with their AD login name and password, if they bring in their own device and try to get the cert from CA, they will be able to successfully install the cert into their device right?
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Dec 17, 2010
I'm using a router 877 at home and i really need to check out what this router do during the day. So some time ago i configured it using some eem actions and sending to me email, without any problems. Yesterday I changed my internet provider and now i need to use smtp autheticantion to send emails.
I read about how to authenticate, like username:password@host and also made a fast search here, without solve my problem. I need to put as username the email of the provider like: mouse@host.com:mypassword@smtpserveraddress.com. So, i want to know if someone had the same problem and solved it. Of course i couldn't use @ two times or eem would think that host.com is my smtp server! And right now is going in this way!
My IOS version is 15.1(2)T2, eem version is 3.1.
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Jan 18, 2012
I have cisco 851 using ccp to configure EASY VPN
I click on TEST VPN SERVER then click start the status shows successfull
when I tried to connect a client I get mm_no_state
When I reviewed the report from the test I found
AAA authentication : Not configured
My AAA
aaa new-model
!
!
aaa authentication login tgcsusers local
aaa authorization network tgcsvpn local(code)
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Apr 25, 2011
I am running ASA version 8.4(1), and anyconnect version 3.0.1047. My SSL VPN works fine, but i run into an issue with one user . his account did not work , and everytime users logged in it got this message "VPN Server could not parse request".
I found the problem after getting a user information meaning his username and password. His password had "&" as one of the special characters. when we change it to something that does not have that , it works just fine.
We are using microsoft NPS server as radius. but when i run a test within CLI it works just fine, only when anyconnect asks to authenticate it fails.
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Aug 26, 2011
before i have problem, i installed CWLMS3.2 and ACS 4.2 and everything is ok, but after upgrade, ACS 4.2 to ACS 5.2, CWLMS can't authenticate to devices and get their configuration. i checked everything include creadential, and i debuged aaa authentication and tacacs on devices. it seems devices can not get username from CWLMS. also i run putty on CWLMS server and try to telnet to devices with ACS username nad password, and the result, there is no problem, and i can telnet to device with ACS username and password without any problem.
the below text is the output of debug on devices when CWLMS try to archive configuration:
R#
Aug 27 05:10:11.571: AAA/BIND(00000064): Bind i/f
Aug 27 05:10:11.571: AAA/AUTHEN/LOGIN (00000064): Pick method list 'CACS'
Aug 27 05:10:11.575: TPLUS: Queuing AAA Authentication request 100 for processing
Aug 27 05:10:11.575: TPLUS: processing authentication start request id 100
Aug 27 05:10:11.575: TPLUS: Authentication start packet created for 100()
[code]...
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Oct 29, 2011
i am facing an issue while trying to configure LDAP integration on Cisco ASA firewall. The requirement is allow the remote access VPN to specific group defined on AD. When i checked the debug logs " debug ldap 255" , it shows that the authenication is sucessfull with the LDAP server , but the ldap attribute is not getting mapped and because of this reason , the tunnel-group default group policy of "NOACCESS" is getting applied ( vpn simultanous set to zero) that results zero connection.
I confirmed this by changing the value of NOACCESS from zero to one and found that the VPN is getting connected
The name of user account is testvendor that belongs to the group of Test-vendor.
The configuration and debug output is shown below.
SHOW RUN
ldap attribute-map ABC-VENDOR
map-name memberOf Group-Policy
[Code]....
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Sep 13, 2012
I have problem with ESW 520, on 802.1x authentication. The problem is when host authenticates successfully it works about couple of minutes, after it truest too authenticate again but it lags. On network interface it shows notification that if Failed authentication. On ACS I see only one authentication attempt which is successful. This problem is happening on Win7 and Win XP. If I unplug and plug cable it authenticates successfully, but then about couple of minutes it again lags. Switch sees port as authenticated. On Win7 event viewer I have following error:
Reason: 0x70004
Reason Text: The network stopped answering authentication requests
Error Code: 0x0
If I connect same hosts on Catalyst 2960 switch, they work successfully.
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Jan 22, 2012
I have a new ACS 5.3 installation which I have joined to our AD Domain and added the directory groups into. I have also added all our devices into ACS and their groups etc but I am still only able to authenticate on the our switches with an internal ACS account, when I try with an external AD account the log shows the following error "Subject not found in the applicable identity Store (s)"
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Jul 9, 2012
I will attempt to explain the history of our wireless controller configurations as best I can. We are currently using a 4400 controller running 7.x software which authenticates to and ACS 4.1 appliance. All of this was set up prior to my arrival on the job and the previous engineers had already left with no documentation in place so I'm trying to piece it together. The ACS is setup to map to AD for specific groups.
In the controller we have an SSID called triton which is our corporate SSID that all internal users connect to. Three different interfaces have been defined, a general one for most users and two others( lets call them INT1 and INT2) that place users on separate ip networks. The reason for this is those ip networks can reach certain services that are not allowed for general users. ACS maps those users upon authentication to the Vlans associated with those separate ip networks.
Problem 1. When I first took this job, users could not map drives or any services because only user authentication was taking place..After some troubleshooting and realization that ACS was authenticating, placing the "Domain Computers" group as an ACS group mapping fixed that issue, allowing the computers to authenticate prior and therefore execute the login script
Problem 2. Recently it has come to my attention that some of the users on one of the other interfaces (INT1 and INT2) that should be placed in the vlans associated with their AD group mapping are not. Upon further investigation it was discovered that the reason they are not is that the authentication is not correct. When the computer first authenticates before the user logs on its shows in ACS as host/xxxxx.yyyy.org where the user authentication shows as xxxxx/username . So some of the computers never change from authenticating as a host to a user and the ip address ends up in the wrong vlan.
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Apr 3, 2012
im having trauble when using chap as authentication for my two routers, i dont know whether my configuration is wrong or not.Is theres anything wrong with the configuration ??note : both routers are c2961
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Aug 6, 2012
Any software to measure Authentication time between client and Radius serverr.
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