Restrict access VPN client on IOS 12.4
I'm trying to restrict access to the client VPN ports for the specific customer VPN leading to a router in 1841 running IOS 12.4 (9).
With versions of IOS of pre-12, 4 that this could be done by using the ACL on the outside, but with version 12.4, it seems that VPN connections are allowed even without a declaration of "permitted" in the external ACL (similar to "sysopt connection permit-ipsec" on the PIX).
Is it possible to limit the VPN traffic on the external interface of the client?
See you soon,.
Christoph.
Hello
The feature you're looking for is called:
Access check crypto on plaintext packets
Check it out in the Configuration Guide for Cisco IOS, version 12.4 security
In sort, set the encryption to your ACL post, go into your crypto-map and apply it with:
set ip access-group {access-list-number | access-list-name} {in | out}
Tags: Cisco Security
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Configure ASA5055 as a remote access VPN client
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Hello
I've set up IPSec VPN remotely and it works fine. I need access to connected VPN clients, and it does not work. I have already added an entry to traffic allowing sheep ACL from inside my network to the VPN.
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interface Ethernet0/0
Speed 100
full duplex
nameif outside
security-level 0
IP x.x.x.x 255.255.255.240
!
interface Ethernet0/1
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full duplex
nameif inside
security-level 100
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interface Management0/0
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permit same-security-traffic intra-interface
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network of the PAT_to_Outside_ClassB object
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network of the PAT_to_Outside_ClassC object
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network of the RemoteNetwork2 object
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network of the RemoteNetwork3 object
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network of the RemoteNetwork4 object
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!
network of the PAT_to_Outside_ClassA object
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network of the PAT_to_Outside_ClassB object
NAT dynamic interface (indoor, outdoor)
network of the PAT_to_Outside_ClassC object
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inside_access_in access to the interface inside group
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!
!
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----------------------------------------------------------------------------------------------------
Mar 7 21:36:47.613: % SSLVPN-5-SSL_TLS_CONNECT_OK: vw_ctx: UNKNOWN vw_gw: VPN_GATEWAY i_vrf: 0 f_vrf: 0 status: successful with SSL/TLS connection distance
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--------------------------------------------------------------------------------------------
====================
Here is the config:
=====================
Crypto pki trustpoint VPN_TRUSTPOINT
enrollment selfsigned
Serial number
name of the object CN = Academy-certificate
crl revocation checking
rsakeypair RSA_KEY
!
!
VPN_TRUSTPOINT crypto pki certificate chain
!
local IP VPN_POOL 192.168.7.100 pool 192.168.7.150
!
WebVPN gateway VPN_GATEWAY
IP address
trustpoint SSL VPN_TRUSTPOINT
Enable logging
development
!
WebVPN install svc flash:/webvpn/anyconnect-win-3.1.02040-k9.pkg sequence 1
!
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DMVPN with based remote access VPN client
Hi all
We DMVPN deployed to connect to our remote location now I want to configure the vpn remote access also with DMVPN tunnel so if somehow our DMVPN tunnel goes down we can connect to the router through vpn remote access client based around... I want experts to do the light on it is it possible or what are the technical challenges that I have to face in this regard.
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Hello
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is hell config please kindly and I would like to know what might happen.
hostname horse
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ins-guard
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!
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!
network obj_any object
dynamic NAT interface (inside, backup)
Access-group interface inside INSIDE_OUT
Access-group OUTSIDE_IN in interface outside
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Timeout conn 01:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
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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
Floating conn timeout 0:00:00
dynamic-access-policy-registration DfltAccessPolicy
identity of the user by default-domain LOCAL
Enable http server
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http 192.168.202.0 255.255.255.0 inside
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No snmp Server contact
Server enable SNMP traps snmp authentication linkup, linkdown cold start
monitor SLA 100
type echo protocol ipIcmpEcho 212.58.244.71 interface outside
Timeout 3000
frequency 5
monitor als 100 calendar life never start-time now
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Crypto ipsec transform-set ikev1 ESP-DES-SHA esp - esp-sha-hmac
Crypto ipsec transform-set ikev1 SHA-ESP-3DES esp-3des esp-sha-hmac
Crypto ipsec transform-set ikev1 esp ESP-DES-MD5-esp-md5-hmac
Crypto ipsec transform-set ikev1 ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac
Crypto ipsec transform-set ikev1 ESP-3DES-MD5-esp-3des esp-md5-hmac
Crypto ipsec transform-set ikev1 ESP-AES-256-SHA esp-aes-256 esp-sha-hmac
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backup of crypto backup_map interface card
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authentication crack
aes-256 encryption
sha hash
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authentication rsa - sig
aes-256 encryption
sha hash
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preshared authentication
aes-256 encryption
sha hash
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IKEv1 crypto policy 40
authentication crack
aes-192 encryption
sha hash
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IKEv1 crypto policy 50
authentication rsa - sig
aes-192 encryption
sha hash
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IKEv1 crypto policy 60
preshared authentication
aes-192 encryption
sha hash
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IKEv1 crypto policy 70
authentication crack
aes encryption
sha hash
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IKEv1 crypto policy 80
authentication rsa - sig
aes encryption
sha hash
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IKEv1 crypto policy 90
preshared authentication
aes encryption
sha hash
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life 86400
IKEv1 crypto policy 100
authentication crack
3des encryption
sha hash
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IKEv1 crypto policy 110
authentication rsa - sig
3des encryption
sha hash
Group 2
life 86400
IKEv1 crypto policy 120
preshared authentication
3des encryption
sha hash
Group 2
life 86400
IKEv1 crypto policy 130
authentication crack
the Encryption
sha hash
Group 2
life 86400
IKEv1 crypto policy 140
authentication rsa - sig
the Encryption
sha hash
Group 2
life 86400
IKEv1 crypto policy 150
preshared authentication
the Encryption
sha hash
Group 2
life 86400
!
track 10 rtr 100 accessibility
Telnet 192.168.200.0 255.255.255.0 inside
Telnet 192.168.202.0 255.255.255.0 inside
Telnet timeout 5
SSH 192.168.202.0 255.255.255.0 inside
SSH 192.168.200.0 255.255.255.0 inside
SSH 0.0.0.0 0.0.0.0 outdoors
SSH timeout 15
SSH group dh-Group1-sha1 key exchange
Console timeout 0
management-access inside
a basic threat threat detection
Statistics-list of access threat detection
no statistical threat detection tcp-interception
WebVPN
internal group vpntunnel strategy
Group vpntunnel policy attributes
Ikev1 VPN-tunnel-Protocol
Split-tunnel-policy tunnelspecified
value of Split-tunnel-network-list vpntunnel_splitTunnelAcl
field default value green.com
internal vpntunnell group policy
attributes of the strategy of group vpntunnell
Ikev1 VPN-tunnel-Protocol
Split-tunnel-policy tunnelspecified
value of Split-tunnel-network-list gbnlvpntunnell_splitTunnelAcl
field default value green.com
Green user name encrypted BoEFKkDtbnX5Uy1Q privilege 15 password
attributes of user name THE
VPN-group-policy gbnlvpn
tunnel-group vpntunnel type remote access
tunnel-group vpntunnel General attributes
address VPNPOOL pool
strategy-group-by default vpntunnel
tunnel-group vpntunnel ipsec-attributes
IKEv1 pre-shared-key *.
type tunnel-group vpntunnell remote access
tunnel-group vpntunnell General-attributes
address VPNPOOL2 pool
Group Policy - by default-vpntunnell
vpntunnell group of tunnel ipsec-attributes
IKEv1 pre-shared-key *.
!
class-map inspection_default
match default-inspection-traffic
!
!
type of policy-card inspect dns migrated_dns_map_1
parameters
maximum message length automatic of customer
message-length maximum 512
Policy-map global_policy
class inspection_default
inspect the migrated_dns_map_1 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
no remote anonymous reporting call
call-home
Profile of CiscoTAC-1
no active account
http https://tools.cisco.com/its/service/oddce/services/DDCEService destination address
email address of destination [email protected] / * /
destination-mode http transport
Subscribe to alert-group diagnosis
Subscribe to alert-group environment
Subscribe to alert-group monthly periodic inventory
monthly periodicals to subscribe to alert-group configuration
daily periodic subscribe to alert-group telemetry
Cryptochecksum:7c1b1373bf2e2c56289b51b8dccaa565
Hello
1 - Please run these commands:
"crypto isakmp nat-traversal 30.
"crypto than dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 Road opposite value.
The main issue here is that you have two roads floating and outside it has a better than backup metric, that's why I added the command 'reverse-road '.
Please let me know.
Thank you.
-
Unable to connect to other remote access (ASA) VPN clients
Hello
I have a cisco ASA 5510 appliance configured with remote VPN access
I can connect all hosts on the INSIDE and DMZ network, but not able to access other clients connected to the same VPN.
For example, if I have 2 clients connected to the VPN, customer and CustomerB, with a pool of vpn IP addresses such as 10.40.170.160 and 10.40.170.161 respectively, these two clients are not able to communicate with each other.
Any help is welcome.
Thanks in advance.
Hello
I'm a little rusty on the old format NAT, but would be what I would personally try to configure NAT0 on the 'outer' interface.
It seems to me that you currently have dynamic PAT configured for the VPN users you have this
NAT (outside) 1 10.40.170.0 255.255.255.0
If your traffic is probably corresponding to it.
The only thing I can think of at the moment would be to configure
Note of VPN-CLIENT-NAT0-access-list NAT0 for traffic between VPN Clients
list of access VPN-CLIENT-NAT0 permit ip 10.40.170.0 255.255.255.0 10.40.170.0 255.255.255.0
NAT (outside) 0-list of access VPN-CLIENT-NAT0
I don't know if it works. I did not really have to configure it on any ASAs running older software. There was some similar questions here on the forums for the new format.
-Jouni
-
IOS router VPN Client (easy VPN) IPsec with Anyconnect
Hello
I would like to set up my router IOS IPsec VPN Client and connect with any connect.
Is it possible to configure an IPSec and SSL VPN Client on IOS router? I use for example a 1841.It would be perfect to give the user the choice of SSL or IPSec protocol. And the user needs that the Anyconnect Client.
I think it's possible with a Cisco ASA. But I can also do this with an IOS router?
Please let me know how if this is possible.
Also is it true that the IOS routers are not affected to hear bug bleed? SSL VPN and SSL VPN with Anyconnect page is also save?
http://Tools.Cisco.com/Security/Center/content/CiscoSecurityAdvisory/CIS...
But I am in any way interested in using IPSec and SSL VPN on a router IOS...
It's true - CCP does not yet offer the options to configure a VPN IPsec with IKEv2.
The configuration guide (here) offers detailed advice and includes examples of configuration.
-
I use soft Cisco VPN client behind a Cisco CCCB router running. What are the ports must be opened to allow the client VPN working properly?
I am currently using:
allow an esp
allow udp any any eq isakmp
These are necessary, but you may also need to open UDP 10000 to support NAT - T if IPSec must cross a NAT border along its way.
You'll also need allow beach access VPN client address to the IP address ranges whatever they are to be used in common. This is because packages through the ACL twice, once encrypted using ESP and ISAKMP, there not yet encrypted.
So, if the VPN client has a range of pool to say 10.1.1.0/24 and his contact only the acl 10.2.0.0/16 subnet would look like:
IP access-group extended VPNACCESS
allow an esp
allow udp any any eq isakmp
permit IP 10.1.1.0 0.0.0.255 10.2.0.0 0.0.255.255
Andy
-
VPN client and redundant peering
Hello world
PC user's config with remote access VPN client.
Tell the client pc has the configuration of the VPN client with backup servers and if ASA primary is the stop will be the secondary question of the new IP address of the client VPN gateway
address automatically?
Here the SAA is not in any failover mode.
Concerning
The list of backup server is used when establishing a new VPN connection. If it the customer has an active connection and the VPN server is no longer available then the user will have to re-establish the connection manually.
--
Please do not forget to rate and choose a good answer
-
VPN clients cannot access remote sites - PIX, routing problem?
I have a problem with routing to remote from our company websites when users connect via their VPN client remotely (i.e. for home workers)
Our headquarters contains a PIX 515E firewall. A number of remote sites to connect (via ADSL) to head office using IPSEC tunnels, ending the PIX.
Behind the PIX is a router 7206 with connections to the seat of LANs and connections to a number of ISDN connected remote sites. The default route on 7206 points to the PIX from traffic firewall which sits to ADSL connected remote sites through the PIX. Internal traffic for LAN and ISDN connected sites is done via the 7206.
Very good and works very well.
When a user connects remotely using their VPN client (connection is interrupted on the PIX) so that they get an IP address from the pool configured on the PIX and they can access resources located on local networks to the office with no problems.
However, the problem arises when a remote user wants access to a server located in one of the remote sites ADSL connected - it is impossible to access all these sites.
On the remote site routers, I configured the access lists to allow access from the pool of IP addresses used by the PIX. But it made no difference. I think that the problem may be the routes configured on the PIX itself, but I don't know what is necessary to solve this problem.
Does anyone have suggestions on what needs to be done to allow access to remote sites for users connected remotely via VPN?
(Note: I suggested a workaround, users can use a server on LAN headquarters as a "jump point" to connect to remote servers from there)
with pix v6, no traffic is allowed to redirect to the same interface.
for example, a remote user initiates an rdp session for one of the barns adsl. PIX decrypts the packet coming from the external interface and looks at the destination. because the destination is one of adsl sites, pix will have to return traffic to the external interface. Unfortunately, pix v6.x has a limitation that would force the pix to drop the packet.
with the v7, this restriction has been removed with the "same-security-traffic control intra-interface permits".
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