Access restricted without the split tunneling
I'm disabled with Split tunneling VPN concentrator. Split tunneling has been disabled to carry the internet traffic of vpn clients via our internal web filtering server. But I must restrict access to my internal servers. How can I do that. I tried with filters/Rules but his does not work, and depending on the traffic of documents filter applies only to the traffic unencrypted.
Thank you
Avil
If you use a VPN3000 while you can apply a filter to the users configured in group. This filter can restrict access to the servers as a list of specific protocols and access. This filter certainly applies to ENCRYPTED traffic, do not know what you are referring to your last sentence.
You must first define the rules to define the traffic you want to restrict address., see here for more details:
http://www.Cisco.com/univercd/CC/TD/doc/product/VPN/vpn3000/4_1/config/polmgt.htm#1321359
Define a filter, then add the rules you just set it to him:
http://www.Cisco.com/univercd/CC/TD/doc/product/VPN/vpn3000/4_1/config/polmgt.htm#1007037
Thne go under the group that these users are configured with, and then apply the filter to it.
A couple of sample filter are the following:
Allow access to 10.1.1.2 and block everything else:
To block access to everything, but 10.10.1.2, create a rule that is Inbound/Forward, Source of Anything, Destination of 10.1.1.2/0.0.0.0. Create another rule, it can be left at the default value which is incoming, drop, no matter what Source Dest what whatsoever. Create a filter with the default action of the front and add two new your rules, ensuring that rule that allows access to the host 10.1.12 is above the default rule which will pass everything else.
Block access to 10.1.1.2, and leave all the rest:
To allow access to everything except 10.10.1.2, create a rule that said, drop, no matter what Source and Destination of 10.10.1.2/0.0.0.0. Add a filter that has a default action is to send, add the rule to the filter.
Notes:
-You can allow or block access to subnets simply by changing your address/mask to something like combination: 10.1.1.0/0.0.0.255
Tags: Cisco Security
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Yes, it should work; as in your example deny 10.0.0.50/32 sholud exclude the traffic in the tunnel.
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Hi Max,.
Please send me the output of 'see the anyconnect vpn-sessiondb' once connected with VPN.
And try to add the following configuration and see if that helps:
NAT (inside, outside) 1 static source NETWORK_OBJ_172.19.88.0_24 NETWORK_OBJ_172.19.88.0_24 static destination VPN-VPN-POOL no-proxy-arp-route search
And one more qusetion do you use split tunnel? If yes then you must make the following changes, because your split tunnel is incorrect, in the split tunnel, you have configured the address pool of vpn. Please make the following change:
no access list SPLIT_TUNNEL standards not allowed 10.0.0.0 255.255.255.0
Standard access list SPLIT_TUNNEL allow 172.19.88.0 255.255.255.0
Group Policy attributes "GroupPolicy AnyConnect"
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Let me know if this can help, or if you have any questions, more about it.
Thank you
Jeet Kumar
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Kind regards
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Our test LAB, we can see that the customer does not have access to 10.2.0.0/24.
Where the place in this case filtering?
- By default, all vehicles coming from VPN, bypasses all ACLs configured on interfaces ASA.
- Filter VPN is not configured.
- Nat0 don't traffic 10.0.0.0/8 to 172.16.1.0/24 NAT
- of the sh ip cry his on the VPN server, we can see, this ident is 0.0.0.0/0
- local ident (addr, mask, prot, port): (0.0.0.0/0.0.0.0/0/0)
- Remote ident (addr, mask, prot, port): (172.16.1.1/255.255.255.255/0/0)
The ACL of split tunnel is capable for remote client traffic filtering?
I understand that your question is in what regards the IPSec VPN Client, no AnyConnect VPN Client, however, I think that the behavior of the split tunnel is the same.
Here's the answer to your question:
A. AnyConnect applies the policy of tunnel in 2 ways:
Monitoring of track 1) and repair (for example if you change the routing table), AnyConnect will restore it to what has been configured.
(2) filtering (on platforms that support filter engines). Filtering ensures that even if you can perform a kind of injection of the route, the filters would block packets.
-
How to add an external IP address to a split tunnel?
Hello
I've set up VPN access on my ASA box as customers use a split tunnel so that only on our internal network traffic through the tunnel. Now, I need to add an external IP address to this tunnel. Is this possible, and if so, how can I achieve that? Just add the address to the list of tunnel network does not; If I do this, the client cannot connect to the external address at all.
Can anyone help?
Cheers, Georg.
Hello
Will need to see some configurations.
Usually incoming VPN traffic bypasses ACL interface. If you have the default setting, you will need to allow traffic to the pool/subnet VPN server. Unless of course the server already has a rule that allows traffic to a "some" source address.
Also a likely problem may be your NAT configuration.
The local IP address of the server the public IP address is included in the current NAT0 configurations for the VPN connection? If yes then which will probably cause problems for connections to its public IP address. Traffic could be abandoned due to a RPF NAT audit that basically checks the NAT that corresponds to the traffic in the opposite direction.
Therefore to confirm the above things, or share configurations, then we can do it.
To my knowledge by adding the address IP of the Split tunnel should naturally also be taken.
EDIT: The number of the station 6000
-Jouni
-
ASA 5505 Split Tunneling configured but still all traffic Tunneling
Hello
I installed an ASA 5505 running 8.3.2 and Cisco AnyConnect Client 2.5.2017.
There are the DefaultRAGroup and a newly configured Group called SplitTunnelNets.
I have 1 internal subnet (192.168.223.0/24) which has a matching ACL/AS configured on the DefaultRAGroup and the custom group policy called SSLClientPolicy.
When I start the VPN with the ASA, I can indeed reach internal resources, but when I look at the routing table, I see a new default gateway route 0.0.0.0 / 0-> 192.168.25.2 (that is in the IP pool) with a metric of 2. The default route before the start of the session AnyConnect now has a higher metric, so the 192.168.25.2 next hop is a priority.
I don't see the routes in the routing table for 192.168.223.0/24 as I expect to see. In the diagnosis of AnyConnect, I see that 0.0.0.0/0 is the policy applied to the client.
Here's my setup. Please tell me if you see something that I'm missing.
ASA 8.3 Version (2)
!
host name asanames of
!
interface Vlan1
nameif inside
security-level 100
IP 192.168.223.254 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
IP x.x.x.x 255.255.255.240
!
interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
boot system Disk0: / asa832 - k8.bin
passive FTP mode
clock timezone IS - 5
clock to summer time EDT recurring
DNS lookup field inside
DNS server-group DefaultDNS
Server name 192.168.223.41
domain Labs.com
network obj_any object
subnet 0.0.0.0 0.0.0.0
vpn-client-net network object
255.255.255.0 subnet 192.168.25.0
network of the internal net object
192.168.223.0 subnet 255.255.255.0
the DM_INLINE_NETWORK_1 object-group network
internal-net network object
network-vpn-client-net object
the DM_INLINE_NETWORK_2 object-group network
internal-net network object
network-vpn-client-net object
SplitTunnelNets to access extensive ip list allow any 192.168.223.0 255.255.255.0
pager lines 24
Enable logging
asdm of logging of information
Within 1500 MTU
Outside 1500 MTU
mask 192.168.25.1 - 192.168.25.50 255.255.255.0 IP local pool SSLClientPool
no failover
ICMP unreachable rate-limit 1 burst-size 1
ICMP allow any inside
ASDM image disk0: / asdm - 635.bin
don't allow no asdm history
ARP timeout 14400
NAT (inside, all) static source internal-net net internal static destination vpn client vpn client-Net
!
network obj_any object
NAT dynamic interface (indoor, outdoor)
Route outside 0.0.0.0 0.0.0.0 x.x.x.x 1
Timeout xlate 03:00
Timeout conn 01:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
Sunrpc timeout 0:10:00 h323 0:05:00 h225 mgcp from 01:00 0:05:00 mgcp-pat 0:05:00
Sip timeout 0:30:00 sip_media 0:02:00 prompt Protocol sip-0: 03:00 sip - disconnect 0:02:00
Timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-registration DfltAccessPolicy
Labs-AAA protocol ldap LDAP-server
AAA-server Lab-LDAP (inside) host 192.168.223.41
Server-port 636
LDAP-base-dn dc = labs, dc = com
LDAP-scope subtree
LDAP-naming-attribute sAMAccountName
LDAP-login-password *.
LDAP-connection-dn [email protected] / * /
enable LDAP over ssl
microsoft server type
Enable http server
http 192.168.223.0 255.255.255.0 inside
No snmp server location
No snmp Server contact
Server enable SNMP traps snmp authentication linkup, linkdown cold start
life crypto ipsec security association seconds 28800
Crypto ipsec kilobytes of life - safety 4608000 association
Crypto ca trustpoint ASDM_TrustPoint0
registration autosslvpnkeypair key pair
Configure CRL
Crypto ca trustpoint ASDM_TrustPoint1
ASDM_TrustPoint1 key pair
Configure CRL
string encryption ca ASDM_TrustPoint0 certificatesTelnet 192.168.223.0 255.255.255.0 inside
Telnet timeout 5
SSH 192.168.223.0 255.255.255.0 inside
SSH timeout 5
Console timeout 0
dhcpd outside auto_config
!a basic threat threat detection
Statistics-list of access threat detection
no statistical threat detection tcp-interception
NTP 192.5.41.41 Server
NTP 192.5.41.40 Server
SSL-trust outside ASDM_TrustPoint1 point
WebVPN
allow outside
No anyconnect essentials
SVC disk0:/anyconnect-win-2.5.2017-k9.pkg 1 image
SVC disk0:/anyconnect-macosx-i386-3.0.0629-k9.pkg 2 image
Picture disk0:/anyconnect-linux-3.0.0629-k9.pkg 3 SVC
enable SVC
tunnel-group-list activate
internal SSLClientPolicy group strategy
attributes of Group Policy SSLClientPolicy
value of server DNS 192.168.223.41
VPN-tunnel-Protocol svc
Split-tunnel-policy tunnelspecifiedvalue of Split-tunnel-network-list SplitTunnelNets
field default value Labs
split dns value Labs.com
the address value SSLClientPool pools
WebVPN
SVC Dungeon-Installer installed
attributes of Group Policy DfltGrpPolicy
value of server DNS 192.168.223.41
Split-tunnel-policy tunnelspecified
value of Split-tunnel-network-list SplitTunnelNets
coyotelabs.com value by default-field
type of remote access service
type tunnel-group SSLClientProfile remote access
attributes global-tunnel-group SSLClientProfile
CoyoteLabs-LDAP authentication-server-group
Group Policy - by default-SSLClientPolicy
tunnel-group SSLClientProfile webvpn-attributes
allow group-alias CoyoteLabs
!
class-map inspection_default
match default-inspection-traffic
!
!
type of policy-card inspect dns preset_dns_map
parameters
maximum message length automatic of customer
message-length maximum 512
Policy-map global_policy
class inspection_default
inspect the preset_dns_map dns
inspect the ftp
inspect h323 h225
inspect the h323 ras
inspect the rsh
inspect the rtsp
inspect esmtp
inspect sqlnet
inspect the skinny
inspect sunrpc
inspect xdmcp
inspect the sip
inspect the netbios
inspect the tftp
Review the ip options
!
global service-policy global_policy
context of prompt hostname
Cryptochecksum:95b7ff58b54e02948a14b225eec1a990
: endThe split tunnel access list must be standard access-list, not extended access list.
You must change the following:
FROM: SplitTunnelNets access-list extended ip to allow all 192.168.223.0 255.255.255.0
To: SplitTunnelNets standard access list allows 192.168.223.0 255.255.255.0You should be able to reconnect again and will be able to access the Internet after you set up the standard access-list split tunnel.
Hope that helps.
-
Split tunneling ACL in easy VPN
Hello
When you look at the following example:
I noticed that the split tunneling ACL defined under the "crypto isakmp client configuration group cisco of" are:
access-list 199 permit ip 192.168.1.0 0.0.0.255 any
access-list 199 permit ip 192.168.3.0 0.0.0.255 any
And the local pool assigned to the customer to fred:
192.168.2.1 192.168.2.10
Is the above mentioned access list not the access list incorrect because there is no mention of 192.168.2.1 to 192.168.2.10?
The statement in the license should say the VPNclient that only traffic 192.168.1.0 AND 192.168.3.0 * should * be encrypted and jumped into the tunnel. Not all traffic since?
If the correct access list would read as follows:
access-list 199 permit ip any 192.168.1.0 0.0.0.255
access-list 199 permit ip any 192.168.3.0 0.0.0.255
Or am I wrong?
Hello
This list (mentioned in the doc) would work fine, but it's better if you use 192.168.2.0 24 in the destination network to be entered specific or specific for all these 10 IPs (.1-->. 10.
Thank you
AFAQ
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