在ASA 9.X上配置AnyConnect VPN客戶端U-turn流量

輸入URL後，瀏覽器會連線到該介面並顯示登入螢幕。

如果使用者滿足登入和身份驗證要求，且安全裝置將使用者識別為需要客戶端，則它將下載與遠端電腦的作業系統匹配的客戶端。

下載後，客戶端將自行安裝和配置、建立安全SSL連線，並在連線終止時自行保留或解除安裝（這取決於安全裝置配置）。

如果是以前安裝的客戶端，當使用者進行身份驗證時，安全裝置會檢查客戶端的修訂版本，並根據需要升級客戶端。

當客戶端與安全裝置協商SSL VPN連線時，它會與傳輸層安全(TLS)連線，並且還會使用資料包傳輸層安全(DTLS)。

DTLS可避免與某些SSL連線相關的延遲和頻寬問題，並提高對資料包延遲敏感的即時應用的效能。

AnyConnect客戶端可以從安全裝置下載，也可以由系統管理員手動安裝在遠端PC上。

有關如何手動安裝客戶端的詳細資訊，請參閱Cisco AnyConnect安全移動客戶端管理員指南。

安全裝置根據建立連線的使用者的組策略或使用者名稱屬性下載客戶端。

您可以將安全裝置配置為自動下載客戶端，也可以將其配置為提示遠端使用者是否下載客戶端。

在後一種情況下，如果使用者沒有響應，您可以將安全裝置配置為在超時時間後下載客戶端或顯示登入頁面。

註：本文檔中使用的示例使用IPv4。對於IPv6 U-turn流量，步驟相同，但使用IPv6地址而不是IPv4。

配置U型轉換遠端訪問流量

本節提供用於設定本文件中所述功能的資訊。

注意：使用命令參考指南可獲取本節中使用的命令的詳細資訊。

用於單臂公共網際網路VPN的AnyConnect VPN客戶端配置示例

網路圖表

本檔案會使用以下網路設定：

ASA 9.1(2)版配置與ASDM 7.1(6)版

本檔案假設基本設定（例如介面組態）已完成後能正常運作。

注意：請參閱配置管理訪問以允許ASDM配置ASA。

注意：在8.0(2)及更高版本中，ASA在外部介面的埠443上同時支援無客戶端SSL VPN(WebVPN)會話和ASDM管理會話。在低於8.0(2)的版本中，除非更改埠號，否則不能在同一ASA介面上啟用WebVPN和ASDM。有關詳細資訊，請參閱在同一介面ASA上啟用ASDM和WebVPN。

完成以下步驟，以便在ASA中配置單臂上的SSL VPN:

1. 選擇 Configuration > Device Setup > Interfaces 並檢查 Enable traffic between two or more hosts connected to the same interface 覈取方塊，以允許SSL VPN流量進入和退出同一介面。按一下 Apply.

   

   等效的CLI配置：

   ciscoasa(config)#same-security-traffic permit intra-interface

2. 選擇 Configuration > Remote Access VPN > Network (Client) Access > Address Assignment > Address Pools > Add 以便建立IP地址池 vpnpool.

   

3. 按一下 Apply.

   等效的CLI配置：

   ciscoasa(config)#ip local pool vpnpool 192.168.10.1-192.168.10.254 mask 255.255.255.0

4. 啟用WebVPN
   1. 選擇 Configuration > Remote Access VPN > Network (Client) Access > SSL VPN Connection Profiles 和 Access Interfaces，按一下覈取方塊 Allow Access 和 Enable DTLS 用於外部介面。請檢視 Enable Cisco AnyConnect VPN Client access on the interfaces selected in the table below 覈取方塊，以便在外部介面上啟用SSL VPN。

      

   2. 按一下 Apply.
   3. 選擇 Configuration > Remote Access VPN > Network (Client) Access > Anyconnect Client Software > Add 以便從ASA的快閃記憶體中新增Cisco AnyConnect VPN客戶端映像，如下所示。
      

      

      

      等效的CLI配置：

      ciscoasa(config)#webvpn
      ciscoasa(config-webvpn)#enable outside
      ciscoasa(config-webvpn)#anyconnect image disk0:/anyconnect-win-3.1.05152-k9.pkg 1
      ciscoasa(config-webvpn)#tunnel-group-list enable
      ciscoasa(config-webvpn)#anyconnect enable

5. 配置組策略。
   1. 選擇 Configuration > Remote Access VPN > Network (Client) Access > Group Policies 以便建立內部組策略 clientgroup.在 General 頁籤中，選擇 SSL VPN Client 覈取方塊以啟用WebVPN作為隧道協定。

      

   2. 在 Advanced > Split Tunneling 頁籤，選擇 Tunnel All Networks 從策略的Policy下拉選單中，使來自遠端PC的所有資料包通過安全隧道。

      

      等效的CLI配置：

      ciscoasa(config)#group-policy clientgroup internal
      ciscoasa(config)#group-policyclientgroup attributes
      ciscoasa(config-group-policy)#vpn-tunnel-protocol ssl-client
      ciscoasa(config-group-policy)#split-tunnel-policy tunnelall

6. 選擇 Configuration > Remote Access VPN > AAA/Local Users > Local Users > Add 建立新使用者帳戶 ssluser1.按一下 OK 然後 Apply.

   

   等效的CLI配置：

   ciscoasa(config)#username ssluser1 password asdmASA@

7. 配置隧道組。
   1. 選擇 Configuration > Remote Access VPN > Network (Client) Access > Anyconnect Connection Profiles > Add 以建立新的隧道組 sslgroup.
   2. 在 Basic 頁籤中，您可以執行配置清單，如下所示：
      • 將隧道組命名為 sslgroup.
      • 在 Client Address Assignment，選擇地址池 vpnpool 從 Client Address Pools 下拉選單。
      • 在 Default Group Policy中，選擇組策略 clientgroup 從 Group Policy 下拉選單。

        

      • 在 Advanced  > Group Alias/Group URL 頁籤，將組別名指定為 sslgroup_users 然後按一下 OK.

        等效的CLI配置：

        ciscoasa(config)#tunnel-group sslgroup type remote-access
        ciscoasa(config)#tunnel-group sslgroup general-attributes
        ciscoasa(config-tunnel-general)#address-pool vpnpool
        ciscoasa(config-tunnel-general)#default-group-policy clientgroup
        ciscoasa(config-tunnel-general)#exit
        ciscoasa(config)#tunnel-group sslgroup webvpn-attributes
        ciscoasa(config-tunnel-webvpn)#group-alias sslgroup_users enable

8. 配置NAT
   1. 選擇 Configuration > Firewall > NAT Rules > Add "Network Object" NAT Rule 以便來自內部網路的流量可以使用外部IP地址172.16.1.1進行轉換。

      

      
   2. 選擇 Configuration > Firewall > NAT Rules > Add "Network Object" NAT Rule 因此，來自外部網路的VPN流量可以用外部IP地址172.16.1.1進行轉換。

      

      等效的CLI配置：

      ciscoasa(config)# object network obj-inside
      ciscoasa(config-network-object)# subnet 10.77.241.128 255.255.255.192
      ciscoasa(config-network-object)# nat (inside,outside) dynamic interface
      
      ciscoasa(config)# object network obj-AnyconnectPool
      ciscoasa(config-network-object)# subnet 192.168.10.0 255.255.255.0
      ciscoasa(config-network-object)# nat (outside,outside) dynamic interface

CLI中的ASA 9.1(2)版配置

ciscoasa(config)#show running-config
: Saved
:
ASA Version 9.1(2)
!
hostname ciscoasa
domain-name default.domain.invalid
enable password 8Ry2YjIyt7RRXU24 encrypted
names
!
interface GigabitEthernet0/0
 nameif outside
 security-level 0
 ip address 172.16.1.1 255.255.255.0
!
interface GigabitEthernet0/1
 nameif inside
 security-level 100
 ip address 10.77.241.142 255.255.255.192
!
interface Management0/0
 shutdown
 no nameif
 no security-level
 no ip address

!
passwd 2KFQnbNIdI.2KYOU encrypted
boot system disk0:/asa802-k8.bin
ftp mode passive
clock timezone IST 5 30
dns server-group DefaultDNS
 domain-name default.domain.invalid
same-security-traffic permit intra-interface

!--- Command that permits the SSL VPN traffic to enter and exit the same interface.

object network obj-AnyconnectPool
 subnet 192.168.10.0 255.255.255.0 
object network obj-inside
 subnet 10.77.241.128 255.255.255.192

!--- Commands that define the network objects we will use later on the NAT section.

pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool vpnpool 192.168.10.1-192.168.10.254 mask 255.255.255.0


!--- The address pool for the Cisco AnyConnect SSL VPN Clients


no failover
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-602.bin
no asdm history enable
arp timeout 14400

nat (inside,outside) source static obj-inside obj-inside destination static
 obj-AnyconnectPool obj-AnyconnectPool

!--- The Manual NAT that prevents the inside network from getting translated
 when going to the Anyconnect Pool.

object network obj-AnyconnectPool
 nat (outside,outside) dynamic interface
object network obj-inside
 nat (inside,outside) dynamic interface

!--- The Object NAT statements for Internet access used by inside users and
 Anyconnect Clients. 
!--- Note: Uses an RFC 1918 range for lab setup. 

route outside 0.0.0.0 0.0.0.0 172.16.1.2 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout uauth 0:05:00 absolute
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 0.0.0.0 0.0.0.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
no crypto isakmp nat-traversal
telnet timeout 5
ssh timeout 5
console timeout 0
threat-detection basic-threat
threat-detection statistics access-list
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum 512
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map
  inspect ftp
  inspect h323 h225
  inspect h323 ras
  inspect netbios
  inspect rsh
  inspect rtsp
  inspect skinny
  inspect esmtp
  inspect sqlnet
  inspect sunrpc
  inspect tftp
  inspect sip
  inspect xdmcp
!
service-policy global_policy global
webvpn
 enable outside


!--- Enable WebVPN on the outside interface


 anyconnect image disk0:/anyconnect-win-3.1.05152-k9.pkg 1


!--- Assign an order to the AnyConnect SSL VPN Client image

 
anyconnect enable


!--- Enable the security appliance to download SVC images to remote computers

 
tunnel-group-list enable


!--- Enable the display of the tunnel-group list on the WebVPN Login page


group-policy clientgroup internal


!--- Create an internal group policy "clientgroup"


group-policy clientgroup attributes
 vpn-tunnel-protocol ssl-client


!--- Specify SSL as a permitted VPN tunneling protocol


split-tunnel-policy tunnelall


!--- Encrypt all the traffic from the SSL VPN Clients.

username ssluser1 password ZRhW85jZqEaVd5P. encrypted


!--- Create a user account "ssluser1"


tunnel-group sslgroup type remote-access


!--- Create a tunnel group "sslgroup" with type as remote access


tunnel-group sslgroup general-attributes
 address-pool vpnpool


!--- Associate the address pool vpnpool created


 default-group-policy clientgroup


!--- Associate the group policy "clientgroup" created


tunnel-group sslgroup webvpn-attributes
 group-alias sslgroup_users enable


!--- Configure the group alias as sslgroup-users

prompt hostname context
Cryptochecksum:af3c4bfc4ffc07414c4dfbd29c5262a9
: end
ciscoasa(config)#

允許使用隧道全部配置在AnyConnect VPN客戶端之間進行通訊

網路圖表

如果需要Anyconnect客戶端之間的通訊，並且單臂公共網際網路的NAT已經就位，則還需要手動NAT以允許雙向通訊。

這是Anyconnect客戶端使用電話服務並且必須能夠相互呼叫時的常見情況。

ASA 9.1(2)版配置與ASDM 7.1(6)版

選擇 Configuration > Firewall > NAT Rules > Add NAT Rule Before "Network Object" NAT Rules 這樣，從外部網路（Anyconnect池）發往來自同一池的另一個Anyconnect客戶端的流量就不會使用外部IP地址172.16.1.1進行轉換。

等效的CLI配置：

nat (outside,outside) source static obj-AnyconnectPool obj-AnyconnectPool destination
 static obj-AnyconnectPool obj-AnyconnectPool

CLI中的ASA 9.1(2)版配置

ciscoasa(config)#show running-config
: Saved
:
ASA Version 9.1(2)
!
hostname ciscoasa
domain-name default.domain.invalid
enable password 8Ry2YjIyt7RRXU24 encrypted
names
!
interface GigabitEthernet0/0
 nameif outside
 security-level 0
 ip address 172.16.1.1 255.255.255.0
!
interface GigabitEthernet0/1
 nameif inside
 security-level 100
 ip address 10.77.241.142 255.255.255.192
!
interface Management0/0
 shutdown
 no nameif
 no security-level
 no ip address

!
passwd 2KFQnbNIdI.2KYOU encrypted
boot system disk0:/asa802-k8.bin
ftp mode passive
clock timezone IST 5 30
dns server-group DefaultDNS
 domain-name default.domain.invalid
same-security-traffic permit intra-interface

!--- Command that permits the SSL VPN traffic to enter and exit the same interface.

object network obj-AnyconnectPool
 subnet 192.168.10.0 255.255.255.0
object network obj-inside
 subnet 10.77.241.128 255.255.255.192

!--- Commands that define the network objects we will use later on the NAT section.

pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool vpnpool 192.168.10.1-192.168.10.254 mask 255.255.255.0


!--- The address pool for the Cisco AnyConnect SSL VPN Clients


no failover
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-602.bin
no asdm history enable
arp timeout 14400

nat (inside,outside) source static obj-inside obj-inside destination static
 obj-AnyconnectPool obj-AnyconnectPool
nat (outside,outside) source static obj-AnyconnectPool obj-AnyconnectPool
 destination static obj-AnyconnectPool obj-AnyconnectPool 

!--- The Manual NAT statements used so that traffic from the inside network
 destined to the Anyconnect Pool and traffic from the Anyconnect Pool destined
 to another Client within the same pool does not get translated. 

object network obj-AnyconnectPool
 nat (outside,outside) dynamic interface
object network obj-inside
 nat (inside,outside) dynamic interface

!--- The Object NAT statements for Internet access used by inside users and
 Anyconnect Clients. 
!--- Note: Uses an RFC 1918 range for lab setup. 

route outside 0.0.0.0 0.0.0.0 172.16.1.2 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout uauth 0:05:00 absolute
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 0.0.0.0 0.0.0.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
no crypto isakmp nat-traversal
telnet timeout 5
ssh timeout 5
console timeout 0
threat-detection basic-threat
threat-detection statistics access-list
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum 512
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map
  inspect ftp
  inspect h323 h225
  inspect h323 ras
  inspect netbios
  inspect rsh
  inspect rtsp
  inspect skinny
  inspect esmtp
  inspect sqlnet
  inspect sunrpc
  inspect tftp
  inspect sip
  inspect xdmcp
!
service-policy global_policy global
webvpn
 enable outside


!--- Enable WebVPN on the outside interface


 anyconnect image disk0:/anyconnect-win-3.1.05152-k9.pkg 1


!--- Assign an order to the AnyConnect SSL VPN Client image

 
anyconnect enable


!--- Enable the security appliance to download SVC images to remote computers

 
tunnel-group-list enable


!--- Enable the display of the tunnel-group list on the WebVPN Login page


group-policy clientgroup internal


!--- Create an internal group policy "clientgroup"


group-policy clientgroup attributes
 vpn-tunnel-protocol ssl-client


!--- Specify SSL as a permitted VPN tunneling protocol


split-tunnel-policy tunnelall


!--- Encrypt all the traffic from the SSL VPN Clients.

username ssluser1 password ZRhW85jZqEaVd5P. encrypted


!--- Create a user account "ssluser1"


tunnel-group sslgroup type remote-access


!--- Create a tunnel group "sslgroup" with type as remote access


tunnel-group sslgroup general-attributes
 address-pool vpnpool


!--- Associate the address pool vpnpool created


 default-group-policy clientgroup


!--- Associate the group policy "clientgroup" created


tunnel-group sslgroup webvpn-attributes
 group-alias sslgroup_users enable


!--- Configure the group alias as sslgroup-users

prompt hostname context
Cryptochecksum:af3c4bfc4ffc07414c4dfbd29c5262a9
: end
ciscoasa(config)#

允許使用拆分隧道的AnyConnect VPN客戶端之間進行通訊

網路圖表

如果需要Anyconnect客戶端之間的通訊且使用拆分隧道，則無需手動NAT以允許雙向通訊，除非存在影響已配置此流量的NAT規則。

但是，拆分隧道ACL中必須包含Anyconnect VPN池。

這是Anyconnect客戶端使用電話服務並且必須能夠相互呼叫時的常見情況。

ASA 9.1(2)版配置與ASDM 7.1(6)版

1. 選擇 Configuration > Remote Access VPN > Network (Client) Access > Address Assignment> Address Pools > Add 以便建立IP地址池 vpnpool.

   

2. 按一下 Apply.

   等效的CLI配置：

   ciscoasa(config)#ip local pool vpnpool 192.168.10.1-192.168.10.254 mask 255.255.255.0

3. 啟用WebVPN
   1. 選擇 Configuration > Remote Access VPN > Network (Client) Access > SSL VPN Connection Profiles 和 Access Interfaces，按一下覈取方塊 Allow Access 和 Enable DTLS 用於外部介面。此外，請檢查 Enable Cisco AnyConnect VPN Client access on the interfaces selected in the table below 覈取方塊，以便在外部介面上啟用SSL VPN。

      

   2. 按一下 Apply.
   3. 選擇 Configuration > Remote Access VPN > Network (Client) Access > Anyconnect Client Software > Add 以便從ASA的快閃記憶體中新增Cisco AnyConnect VPN客戶端映像，如下所示。
      
      

      

      
      
      

      

      等效的CLI配置：

      ciscoasa(config)#webvpn
      ciscoasa(config-webvpn)#enable outside
      ciscoasa(config-webvpn)#anyconnect image disk0:/anyconnect-win-3.1.05152-k9.pkg 1
      ciscoasa(config-webvpn)#tunnel-group-list enable
      ciscoasa(config-webvpn)#anyconnect enable

4. 配置組策略。
   1. 選擇 Configuration > Remote Access VPN > Network (Client) Access > Group Policies 以便建立內部組策略 clientgroup.在 General 頁籤中，選擇 SSL VPN Client 覈取方塊，以便將WebVPN作為允許的隧道協定啟用。

      

   2. 在 Advanced > Split Tunneling 頁籤，選擇 Tunnel Network List Below 從策略下拉選單中，使來自遠端PC的所有資料包通過安全隧道。

      等效的CLI配置：

      ciscoasa(config)#access-list SPLIt-ACL standard permit 10.77.241.0 255.255.255.0
      ciscoasa(config)#access-list SPLIt-ACL standard permit 192.168.10.0 255.255.255.0
      
      ciscoasa(config)#group-policy clientgroup internal
      ciscoasa(config)#group-policy clientgroup attributes
      ciscoasa(config-group-policy)#vpn-tunnel-protocol ssl-client
      ciscoasa(config-group-policy)#split-tunnel-policy tunnelspecified
      ciscoasa(config-group-policy)#split-tunnel-network-list SPLIt-ACL

5. 選擇 Configuration > Remote Access VPN > AAA/Local Users > Local Users > Add 建立新使用者帳戶 ssluser1.按一下 OK 然後 Apply.

   

   等效的CLI配置：

   ciscoasa(config)#username ssluser1 password asdmASA@

6. 配置隧道組。
   1. 選擇 Configuration > Remote Access VPN > Network (Client) Access > Anyconnect Connection Profiles > Add 以建立新的隧道組 sslgroup.
   2. 在 Basic 頁籤中，您可以執行配置清單，如下所示：
      • 將隧道組命名為 sslgroup.
      • 在 Client Address Assignment，選擇地址池 vpnpool 從 Client Address Pools 下拉選單。
      • 在 Default Group Policy中，選擇組策略 clientgroup 從 Group Policy 下拉選單。

        

      • 在 Advanced > Group Alias/Group URL 頁籤，將組別名指定為 sslgroup_users 然後按一下 OK.

        等效的CLI配置：

        ciscoasa(config)#tunnel-group sslgroup type remote-access
        ciscoasa(config)#tunnel-group sslgroup general-attributes
        ciscoasa(config-tunnel-general)#address-pool vpnpool
        ciscoasa(config-tunnel-general)#default-group-policy clientgroup
        ciscoasa(config-tunnel-general)#exit
        ciscoasa(config)#tunnel-group sslgroup webvpn-attributes
        ciscoasa(config-tunnel-webvpn)#group-alias sslgroup_users enable

CLI中的ASA 9.1(2)版配置

ciscoasa(config)#show running-config
: Saved
:
ASA Version 9.1(2)
!
hostname ciscoasa
domain-name default.domain.invalid
enable password 8Ry2YjIyt7RRXU24 encrypted
names
!
interface GigabitEthernet0/0
 nameif outside
 security-level 0
 ip address 172.16.1.1 255.255.255.0
!
interface GigabitEthernet0/1
 nameif inside
 security-level 100
 ip address 10.77.241.142 255.255.255.192
!
interface Management0/0
 shutdown
 no nameif
 no security-level
 no ip address

!
passwd 2KFQnbNIdI.2KYOU encrypted
boot system disk0:/asa802-k8.bin
ftp mode passive
clock timezone IST 5 30
dns server-group DefaultDNS
 domain-name default.domain.invalid
same-security-traffic permit intra-interface

!--- Command that permits the SSL VPN traffic to enter and exit the same interface.

object network obj-inside
 subnet 10.77.241.128 255.255.255.192

!--- Commands that define the network objects we will use later on the NAT section.

access-list SPLIt-ACL standard permit 10.77.241.0 255.255.255.0
access-list SPLIt-ACL standard permit 192.168.10.0 255.255.255.0

!--- Standard Split-Tunnel ACL that determines the networks that should travel the
 Anyconnect tunnel.

pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool vpnpool 192.168.10.1-192.168.10.254 mask 255.255.255.0

!--- The address pool for the Cisco AnyConnect SSL VPN Clients

no failover
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-602.bin
no asdm history enable
arp timeout 14400

nat (inside,outside) source static obj-inside obj-inside destination static
 obj-AnyconnectPool obj-AnyconnectPool

!--- The Manual NAT that prevents the inside network from getting translated when
 going to the Anyconnect Pool
 
object network obj-inside
 nat (inside,outside) dynamic interface

!--- The Object NAT statements for Internet access used by inside users. 
!--- Note: Uses an RFC 1918 range for lab setup. 

route outside 0.0.0.0 0.0.0.0 172.16.1.2 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout uauth 0:05:00 absolute
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 0.0.0.0 0.0.0.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
no crypto isakmp nat-traversal
telnet timeout 5
ssh timeout 5
console timeout 0
threat-detection basic-threat
threat-detection statistics access-list
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum 512
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map
  inspect ftp
  inspect h323 h225
  inspect h323 ras
  inspect netbios
  inspect rsh
  inspect rtsp
  inspect skinny
  inspect esmtp
  inspect sqlnet
  inspect sunrpc
  inspect tftp
  inspect sip
  inspect xdmcp
!
service-policy global_policy global
webvpn
 enable outside


!--- Enable WebVPN on the outside interface


 anyconnect image disk0:/anyconnect-win-3.1.05152-k9.pkg 1


!--- Assign an order to the AnyConnect SSL VPN Client image

 
anyconnect enable


!--- Enable the security appliance to download SVC images to remote computers

 
tunnel-group-list enable


!--- Enable the display of the tunnel-group list on the WebVPN Login page


group-policy clientgroup internal


!--- Create an internal group policy "clientgroup"


group-policy clientgroup attributes
 vpn-tunnel-protocol ssl-client


!--- Specify SSL as a permitted VPN tunneling protocol


split-tunnel-policy tunnelspecified


!--- Encrypt  only traffic specified on the split-tunnel ACL coming from the SSL
 VPN Clients.


split-tunnel-network-list value SPLIt-ACL


!--- Defines the previosly configured ACL to the split-tunnel policy.

username ssluser1 password ZRhW85jZqEaVd5P. encrypted


!--- Create a user account "ssluser1"


tunnel-group sslgroup type remote-access


!--- Create a tunnel group "sslgroup" with type as remote access


tunnel-group sslgroup general-attributes
 address-pool vpnpool


!--- Associate the address pool vpnpool created


 default-group-policy clientgroup


!--- Associate the group policy "clientgroup" created


tunnel-group sslgroup webvpn-attributes
 group-alias sslgroup_users enable


!--- Configure the group alias as sslgroup-users

prompt hostname context
Cryptochecksum:af3c4bfc4ffc07414c4dfbd29c5262a9
: end
ciscoasa(config)#

驗證

使用本節內容，確認您的組態是否正常運作。

• show vpn-sessiondb svc — 顯示有關當前SSL連線的資訊。

  ciscoasa#show vpn-sessiondb anyconnect
  
  Session Type: SVC
  
  Username     : ssluser1               Index        : 12
  Assigned IP  : 192.168.10.1           Public IP    : 192.168.1.1
  Protocol     : Clientless SSL-Tunnel DTLS-Tunnel
  Encryption   : RC4 AES128             Hashing      : SHA1
  Bytes Tx     : 194118                 Bytes Rx     : 197448
  Group Policy : clientgroup            Tunnel Group : sslgroup
  Login Time   : 17:12:23 IST Mon Mar 24 2008
  Duration     : 0h:12m:00s
  NAC Result   : Unknown
  VLAN Mapping : N/A                    VLAN         : none

• show webvpn group-alias — 顯示各種組的已配置別名。

  ciscoasa#show webvpn group-alias
  Tunnel Group: sslgroup   Group Alias: sslgroup_users enabled

• 在ASDM中，選擇 Monitoring > VPN > VPN Statistics > Sessions 以便瞭解ASA中的當前會話。

  

疑難排解

本節提供的資訊用於對組態進行疑難排解。

• vpn-sessiondb logoff name — 命令註銷特定使用者名稱的SSL VPN會話。

  ciscoasa#vpn-sessiondb logoff name ssluser1
  Do you want to logoff the VPN session(s)? [confirm] Y
  INFO: Number of sessions with name "ssluser1" logged off : 1
  
  ciscoasa#Called vpn_remove_uauth: success!
  webvpn_svc_np_tear_down: no ACL
  webvpn_svc_np_tear_down: no IPv6 ACL
  np_svc_destroy_session(0xB000)

  同樣地，也可使用 vpn-sessiondb logoff anyconnect 命令以終止所有AnyConnect會話。

• debug webvpn anyconnect <1-255> — 提供即時webvpn事件以建立會話。

  Ciscoasa#debug webvpn anyconnect 7
  
  CSTP state = HEADER_PROCESSING
  http_parse_cstp_method()
  ...input: 'CONNECT /CSCOSSLC/tunnel HTTP/1.1'
  webvpn_cstp_parse_request_field()
  ...input: 'Host: 10.198.16.132'
  Processing CSTP header line: 'Host: 10.198.16.132'
  webvpn_cstp_parse_request_field()
  ...input: 'User-Agent: Cisco AnyConnect VPN Agent for Windows 3.1.05152'
  Processing CSTP header line: 'User-Agent: Cisco AnyConnect VPN Agent for Windows
  3.1.05152'
  Setting user-agent to: 'Cisco AnyConnect VPN Agent for Windows 3.1.05152'
  webvpn_cstp_parse_request_field()
  ...input: 'Cookie: webvpn=146E70@20480@567F@50A0DFF04AFC2411E0DD4F681D330922F4B21F60'
  Processing CSTP header line: 'Cookie: webvpn=
  146E70@20480@567F@50A0DFF04AFC2411E0DD4F681D330922F4B21F60'
  Found WebVPN cookie: 'webvpn=146E70@20480@567F@50A0DFF04AFC2411E0DD4F681D330922F4B21F60'
  WebVPN Cookie: 'webvpn=146E70@20480@567F@50A0DFF04AFC2411E0DD4F681D330922F4B21F60'
  webvpn_cstp_parse_request_field()
  ...input: 'X-CSTP-Version: 1'
  Processing CSTP header line: 'X-CSTP-Version: 1'
  Setting version to '1'
  webvpn_cstp_parse_request_field()
  ...input: 'X-CSTP-Hostname: WCRSJOW7Pnbc038'
  Processing CSTP header line: 'X-CSTP-Hostname: WCRSJOW7Pnbc038'
  Setting hostname to: 'WCRSJOW7Pnbc038'
  webvpn_cstp_parse_request_field()
  ...input: 'X-CSTP-MTU: 1280'
  Processing CSTP header line: 'X-CSTP-MTU: 1280'
  webvpn_cstp_parse_request_field()
  ...input: 'X-CSTP-Address-Type: IPv6,IPv4'
  Processing CSTP header line: 'X-CSTP-Address-Type: IPv6,IPv4'
  webvpn_cstp_parse_request_field()
  webvpn_cstp_parse_request_field()
  ...input: 'X-CSTP-Base-MTU: 1300'
  Processing CSTP header line: 'X-CSTP-Base-MTU: 1300'
  webvpn_cstp_parse_request_field()
  webvpn_cstp_parse_request_field()
  ...input: 'X-CSTP-Full-IPv6-Capability: true'
  Processing CSTP header line: 'X-CSTP-Full-IPv6-Capability: true'
  webvpn_cstp_parse_request_field()
  ...input: 'X-DTLS-Master-Secret: F1810A764A0646376F7D254202A0A602CF075972F91EAD1
  9BB6BE387BB8C6F893BFB49886D47F9A4BE2EA2A030BF620D'
  Processing CSTP header line: 'X-DTLS-Master-Secret: F1810A764A0646376F7D254202A0
  A602CF075972F91EAD19BB6BE387BB8C6F893BFB49886D47F9A4BE2EA2A030BF620D'
  webvpn_cstp_parse_request_field()
  ...input: 'X-DTLS-CipherSuite: AES256-SHA:AES128-SHA:DES-CBC3-SHA:DES-CBC-SHA'
  Processing CSTP header line: 'X-DTLS-CipherSuite: AES256-SHA:AES128-SHA:DES-CBC3
   -SHA:DES-CBC-SHA'
  webvpn_cstp_parse_request_field()
  ...input: 'X-DTLS-Accept-Encoding: lzs'
  Processing CSTL header line: 'X-DTLS-Accept-Encoding: lzs'
  webvpn_cstp_parse_request_field()
  ...input: 'X-DTLS-Header-Pad-Length: 0'
  webvpn_cstp_parse_request_field()
  ...input: 'X-CSTP-Accept-Encoding: lzs,deflate'
  Processing CSTP header line: 'X-CSTP-Accept-Encoding: lzs,deflate'
  webvpn_cstp_parse_request_field()
  ...input: 'X-CSTP-Protocol: Copyright (c) 2004 Cisco Systems, Inc.'
  Processing CSTP header line: 'X-CSTP-Protocol: Copyright (c) 2004 Cisco Systems, Inc.'
  Validating address: 0.0.0.0
  CSTP state = WAIT_FOR_ADDRESS
  webvpn_cstp_accept_address: 192.168.10.1/255.255.255.0
  webvpn_cstp_accept_ipv6_address: No IPv6 Address
  CSTP state = HAVE_ADDRESS
  SVC: Sent gratuitous ARP for 192.168.10.1.
  SVC: NP setup
  np_svc_create_session(0x5000, 0xa930a180, TRUE)
  webvpn_svc_np_setup
  SVC ACL Name: NULL
  SVC ACL ID: -1
  vpn_put_uauth success for ip 192.168.10.1!
  No SVC ACL
  Iphdr=20 base-mtu=1300 def-mtu=1500 conf-mtu=1406
  tcp-mss = 1260
  path-mtu = 1260(mss)
  mtu = 1260(path-mtu) - 0(opts) - 5(ssl) - 8(cstp) = 1247
  tls-mtu = 1247(mtu) - 20(mac) = 1227
  DTLS Block size = 16
  mtu = 1300(base-mtu) - 20(ip) - 8(udp) - 13(dtlshdr) - 16(dtlsiv) = 1243
  mod-mtu = 1243(mtu) & 0xfff0(complement) = 1232
  dtls-mtu = 1232(mod-mtu) - 1(cdtp) - 20(mac) - 1(pad) = 1210
  computed tls-mtu=1227 dtls-mtu=1210 conf-mtu=1406
  DTLS enabled for intf=2 (outside)
  tls-mtu=1227 dtls-mtu=1210
  SVC: adding to sessmgmt
  
  Unable to initiate NAC, NAC might not be enabled or invalid policy
  CSTP state = CONNECTED
  webvpn_rx_data_cstp
  webvpn_rx_data_cstp: got internal message
  Unable to initiate NAC, NAC might not be enabled or invalid policy

• 在ASDM中，選擇 Monitoring > Logging > Real-time Log Viewer > View 以便檢視即時事件。此範例顯示透過ASA 172.16.1.1在Internet中的AnyConnect 192.168.10.1和Telnet Server10.2.2.2之間的作業階段資訊。

  

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