Question

VPN (Firewall) Configuration (Cisco ASA5500) # 3

Asked by: tjie

Hi,
1) I need to get clarification, confirmation and explanation (from the experts) related to Cisco VPN Configuration (Cisco ASA5500)
2) Would you please explain the meaning and the goal of this IOS commands:

First: group-policy remotevpn internal
    *What is "group-policy"? It must be a kind of rule? right?
    * What does it mean by "remotevpn"? (VPN is sure from Remote, right?)
    * What and why "internal"? (This is confusing)

Second: group-policy remotevpn attributes
    * What does the meaning of "attributes" here, and for what?

Third: dns-server value 10.254.254.10
    * This means that the IP address of DNS server is 10.255.255.10? right?

Fourth: From earlier discussion, some experts say that IOS command is not the same as ASA command.
    * is that right?
    * Would you give the "link" to the ASA command?
3) Thank you

tjie

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Asked On
2009-10-14 at 23:54:11ID24813949
Topics

Cisco PIX Firewall

,

IPSec Security Protocol

,

Network Routers

Participating Experts
2
Points
500
Comments
3

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Answers

 

by: PeteLongPosted on 2009-10-15 at 01:41:42ID: 25578506

>> group-policy remotevpn internal

you have a gorup polocy called rremotevpn (it could be called anything)

vpn-group-policy
To have a user inherit attributes from a configured group policy, use the vpn-group-policy command in username configuration mode. To remove a group policy from a user configuration, use the no version of this command. Using this command lets users inherit attributes that you have not configured at the username level.
vpn-group-policy {group-policy name}
no vpn-group-policy {group-policy name}

>>What is "group-policy"? It must be a kind of rule? right?

see above

>>What and why "internal"? (This is confusing)


 external  Enter this keyword to specify an external group policy
 internal  Enter this keyword to specify an internal group policy

>>Second: group-policy remotevpn attributes
 >>  * What does the meaning of "attributes" here, and for what?

attributes lets you configure the things to do with that policy i.e.

They are (theres a lot of them be warned)

 address-pools                     Configure list of up to 6 address pools to
                                   assign addresses from
 backup-servers                    Configure list of backup servers to be used
                                   by the remote client
 banner                            Configure a banner, or welcome text to be
                                   displayed on the VPN remote client
 client-access-rule                Specify rules permitting/denying access to
                                   specific client types and versions.
 client-firewall                   Configure the firewall requirements for
                                   users in this group-policy
 default-domain                    Configure default domain name given to
                                   users of this group
 dhcp-network-scope                Specify the range of IP addresses to
                                   indicate to the DHCP server for address
                                   assignment
 dns-server                        Configure the primary and secondary DNS
                                   servers
 exit                              Exit from group-policy configuration mode
 group-lock                        Enter name of an existing tunnel-group that
                                   users are required to connect with
 help                              Help for group_policy configuration
                                   commands
 intercept-dhcp                    Enable this command to use group policy for
                                   clients requesting Microsoft DHCP
 ip-comp                           Enter this command to enable IP compression
                                   (LZS)
 ip-phone-bypass                   Configure to allow Cisco IP phones behind
                                   Hardware clients to bypass the Individual
                                   User Authentication process.
 ipsec-udp                         Enter this command to allow a client to
                                   operate through a NAT device using UDP
                                   encapsulation
 ipsec-udp-port                    Enter the UDP port to be used by the client
                                   for IPSec through NAT
 leap-bypass                       Enable/disable LEAP packets from Cisco
                                   wireless devices to bypass the individual
                                   user authentication process. This setting
                                   applies only to HW clients.
 msie-proxy                        Enter this command to configure MSIE
                                   Browser Proxy settings for a client system
 nac                               Enable/Disable Network Admission
                                   Control(NAC).
 nac-default-acl                   Specify the filter to apply when NAC is
                                   initialized
 nac-reval-period                  Specify the NAC Revalidation timer
 nac-sq-period                     Specify the NAC Status Query timer
 nem                               Configure hardware clients to use network
                                   extension mode. This setting applies only
                                   to HW clients.
 no                                Remove an attribute value pair
 password-storage                  Enable/disable storage of the login
                                   password on the client system
 pfs                               Enter this command to indicate that the
                                   remote client needs to perform PFS
 re-xauth                          Enter this command to enable
                                   reauthentication of the user on IKE rekey
 secure-unit-authentication        Configure interactive authentication. This
                                   setting applies only to HW clients.
 split-dns                         Configure list of domains to be resolved
                                   through the Split Tunnel
 split-tunnel-network-list         Configure name of access-list for split
                                   tunnel configuration
 split-tunnel-policy               Select the split tunneling method to be
                                   used by the remote client
 user-authentication               Configure individual user authentication.
                                   This setting applies only to HW clients.
 user-authentication-idle-timeout  Configure the idle timeout period in
                                   minutes. If there is no communication in
                                   this period, the system terminates the
                                   connection. This setting applies only to HW
                                   clients.
 vpn-access-hours                  Enter name of a configured time-range
                                   policy
 vpn-filter                        Enter name of a configured ACL to apply to
                                   users
 vpn-idle-timeout                  Enter idle timeout period in minutes, enter
                                   none to disable
 vpn-nac-exempt                    Specify NAC Exception List entries
 vpn-session-timeout               Enter maximum user connection time in
                                   minutes, enter none for unlimited time
 vpn-simultaneous-logins           Enter maximum number of simultaneous logins
                                   allowed
 vpn-tunnel-protocol               Enter permitted tunneling protocols
 webvpn                            Configure group policy for WebVPN
 wins-server                       Configure the primary and secondary WINS
                                   servers

 

>>Third: dns-server value 10.254.254.10
   * This means that the IP address of DNS server is 10.255.255.10? right?

Spot on thats correct :)

>>Fourth: From earlier discussion, some experts say that IOS command is not the same as ASA command.
   * is that right?
   * Would you give the "link" to the ASA command?

Yes its very different :)

http://tools.cisco.com/Support/CLILookup/cltSearchAction.do?Application_ID=CLT&IndexId=IOS&IndexOptionId=123&SearchPhrase="*"&Paging=25&ActionType=getCommandList&Bookmark=True

Note you will need a valid support agreement for that link to work

ASA config guides

http://www.cisco.com/en/US/products/ps6120/tsd_products_support_configure.html

 

by: rsivanandanPosted on 2009-10-15 at 08:00:40ID: 25581249

I think it'd be better to take a look at the VPN Configuration where these attributes are used;

http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a008060f25c.shtml

The above link should clarify it.

Cheers,
rsivanandan

 

by: PeteLongPosted on 2009-10-15 at 13:14:34ID: 25584386

ThanQ

20120131-EE-VQP-002

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