ACL IPSEC - CRYPTO vs Interface

Hello

Where an IOS device is connected to a PIX 6.3, with a VPN IPSec site to site with ipsec connection allowed sysopt

Thinking that it would be simpler to apply the required ACL, I created the ACL crypto to the entire subnet with the thought I would create ACL interface for nailing to specific hosts inside the subnet. I see now that I need to disable the connection of sysopt permit-ipsec for the ACL interface to apply.

1. is it more common for crypto ACL to be more host specific vs specific subnet and the necessary ACL ONLY (with the active sysopt)? I have a true Swiss cheese of the armies on either side of the vpn that need access and I didn't want to maintain such a complicated in meaning OPPOSITE ACL.

2 or it is more common for both - crypto ACL (allow a simpler ACL) then apply ACL interface?

3. I see the issue with the realization of the interface & crypto ACL, there is more that can get sent THEN denied to the remote interface, or even blocked traffic on the local side. If the ACL interface should be used, what is the best practice here?

4. I see the interface that acl work when sysopt allowed ipsec connection is enabled, but only on outbound traffic. Is it because traffic has not struck the crypto ACL again?

Any pointers in the right direction would be appreciated.

Thank you

Dan Foxley

Dan

Much depends on whether the VPN device also acts as a firewall. If this isn't ie. Once the traffic has been decrypted, it is then passed on the firewall then allowed sysopt of active ipsec connection is a logical choice.

In response to your questions, speak from my personal experience-

(1) crypto ACL tend to be more subnet than host-based, but it depends on your specific needs.

(2) Yes, in general the crypto acl is more general, the acl interface is where you attach.

(3) don't know, I followed. If you want to limit this subnet traffic is sent through the tunnel then you would with an acl interface but on a different interface IE. the interface more near the source of the traffic.

(4) it is to do with the order of treatment IE. which is done first. Not really used an acl outgoing on the same interface as endpoint vpn but I suspect you're right.

Note that you do not need to apply the acl on the actual interface the VPN ends, at least with the code v7.x and beyond. You can terminate the VPN on the external interface, and then use an outbound acl on the interface that is sent unencrypted traffic. Yes, that means he has to go through the firewall, but it can make the management of your ACLs easier.

Jon

Tags: Cisco Security

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L2l Tunnel between 2POIGNEES: general query on ACL sheep/crypto

Hi all

For the L2L tunnel between 2POIGNEES work very well, we configure normally same network to network - sheep & cryptos ACL on both ends of the SAA. My question is...

It will work without any problem, if on one end of the ASA, the ACL sheep & crypto are combined to form the group object (to limit the ASA configs) and on the other end address net net address ACL sheep & crypto still exists (not consolidated in the Group of objects)... ? If it works, it works even if the tunnel is between ASA--> router.

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MS, it will work if the other side does not use the same scenario of acl consolidated using groups of objects. ACLs and groups of objects are significant locally on the device.

You can consolidate the ACLs on the ASA/PIX using TCP or UDP-groups of objects or groups of objects network and that your acl to the respective object-group, they always have the same effect as when they have been configured individually line by line.

This works even if the tunnel is between ASA--> router

Yes

HTH

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We use a router CISCO1921-SEC. On the side "WAN", we have 1 public IP assigned by DHCP address.

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Message geändert durch NISITNETC

When the tunnels are completed on the router, which is the area free, by default, all traffic is allowed, if you want to restrict access, you must create a free zone and add a pair of WAN area to auto.

Hope this link will help you,

http://INKLING/?q=node/1305

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Hello

Try the command:

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I have a question relating to the ACL on an interface oriented routers 'Internet '.

After reading several whitepapers on the subject, an ACL recommended would typically contain the following instructions.

In addition, the Cisco SDM automatically generates an ACL externally similar face:

IP extended INBOUND access list

permit any any icmp echo

permit any any icmp echo response

allow all all unreachable icmp

deny ip 10.0.0.0 0.255.255.255 everything

deny ip 172.16.0.0 0.15.255.255 all

deny ip 192.168.0.0 0.0.255.255 everything

deny ip 127.0.0.0 0.255.255.255 everything

refuse the host ip 0.0.0.0 everything

refuse an entire ip

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So my question is...

What is the point of lines 4-8 during the last line blocking them anyway?

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Instead, the following ACL would provide the same benefit and be easier to maintain.

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Am I missing something obvious?

Thanks in advance for the help,

Kind regards.

Hello Peter,.

I believe that when people post these examples, they assume you will put additional instructions forward the "deny ip any any" at the end. There are really a few rules that you must use when you create an Internet facing ACL:

1 deny incoming traffic from your IP addresses registered to prevent identity theft.

2 refuse incoming Microsoft LAN traffic (port 445, 137-139, etc)-any legitimate Microsoft LAN traffic should be limited to a VPN.

3 deny traffic from private addresses or null.

I'm sure that you realize that packages can be made with the ILO established is enabled and use private addresses (broadcast or unicast) or your addresses as a source to create the undesirable traffic or denial of service attacks. That's why these statements are called separately. You would use before the "permit tcp everything (recorded your IP range), set up" statement.

Your ACL proposed only allows tcp responses to queries generated internally. Unless you really don't want any UDP traffic, you must include a reflexive access list statement to allow the UDP. I hope also that you have a big server log or only a few hosts on your network - check all tcp traffic will take a little space!

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Okay, so just as a test of validation, I have a question for the group. When you configure the cryptographic ACL that defines interesting traffic for a tunnel, are we able to use summaries?

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A site would have the networks

10.10.0.0/24

10.10.1.0/24

etc.

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access-list 101 permit ip 10.10.0.0 0.0.255.255 10.5.10.0 0.0.0.255

Thanks for all your comments!

Hello

Yes, that's perfectly fine.

As long as we have routes set up correctly, nothing should stand in your way of configuring the acl like this.

Kind regards

Praveen

Encryption: "Apply crypto map interface.

East - the best forum to discuss encryption?

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Mark

Hi Mark,

Apply the card encryption to your outgoing interface (Dialer)

You probably will lock the router by putting

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I suggest you

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social-seat extended IP access list

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Card crypto on Interface Ethernet

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I don't have that much experience but with VPN configs, so maybe this question will seem a bit silly. I have a Cisco 831 that I use to connect via VPN to a remote site. Everything works fine.

Then I wanted to add a second tunnel to another location. I did all the configs needed, applied card encryption on ethernet external and everything was fine, I could connect. But then I noticed that the new encryption card has actually replaced the existing one. Of course, the first VPN was no longer works.

Is this a limitation of the 831? Or y at - it another way to configure them so I can use the two (or even more than two) at the same time? Do I need another Cisco router if I want more than a tunnel?

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This isn't a limitation of the router. But by design,.

only one crypto map set can be assigned to an interface. If multiple crypto map entries have the same name but a different seq - num map, they are considered as part of the same set, and all apply to the interface.

So what you need to do is create crypto-map with the same name for slot 2, but give a different sequence number. Apply this encryption card to the interface and it will work. From the seq - num lowest crypto card is considered to be the highest priority, and will be evaluated first.

WinXP L2TP, Linksys in Pix 6.2 - FIXED

PIX 515e 6.2 at the central office, VPN Linksys at the remote office L2L, trying to install WinXP SP3 & Vista VPN remote clients using L2TP. First question: is it even possible, without using the Cisco VPN client or the upgrade of the Pix OS? Second question: if it's possible, what's wrong with my current config? The L2L VPN works fine, but when the Windows XP client attempts to connect, that's what I get:
```
ISAKMP (0): atts are acceptable.IPSEC(validate_proposal_request): proposal part #1,

  (key eng. msg.) dest= (PIX outside address), src= (WinXP outside address),

    dest_proxy= (PIX outside address)/255.255.255.255/17/1701 (type=1),

    src_proxy= (WinXP internal address)/255.255.255.255/17/1701 (type=1),

    protocol= ESP, transform= esp-3des esp-sha-hmac ,

    lifedur= 0s and 0kb,

    spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x0

IPSEC(validate_transform_proposal): proxy identities not supported

IPSEC(validate_proposal_request): proposal part #1,

  (key eng. msg.) dest= (PIX outside address), src= (WinXP outside address),

    dest_proxy= (PIX outside address)/255.255.255.255/17/1701 (type=1),

    src_proxy= (WinXP internal address)/255.255.255.255/17/1701 (type=1),

    protocol= ESP, transform= esp-3des esp-sha-hmac ,

    lifedur= 0s and 0kb,

    spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x0

IPSEC(validate_transform_proposal): proxy identities not supported
ISAKMP: IPSec policy invalidated proposal

ISAKMP : Checking IPSec proposal 2
```
6.2 (2) version PIX
Permitted connection ipsec sysopt
Sysopt connection permit-pptp
Sysopt connection permit-l2tp
Sysopt pl compatible ipsec
No sysopt route dnat

IP CO_WAN 255.255.224.0 allow Access-list sheep Remote_LAN 255.255.255.0
IP DMZ_LAN 255.255.255.0 allow Access-list sheep Remote_LAN 255.255.255.0
IP CO_LAN 255.255.255.0 allow Access-list sheep 10.100.100.0 255.255.255.0

IP pool local VPNPool 10.100.100.100 - 10.100.100.110

NAT (inside) 0 access-list sheep

Permitted connection ipsec sysopt
Sysopt connection permit-pptp
Sysopt connection permit-l2tp
Sysopt pl compatible ipsec
No sysopt route dnat

Crypto ipsec transform-set esp-3des esp-sha-hmac LINKSYS_TS
Crypto ipsec transform-set esp-3des esp-sha-hmac WINCLIENT_TS
Crypto ipsec transform-set transit mode WINCLIENT_TS
Dynamic crypto map L2TP 30 game of transformation-WINCLIENT_TS

ONLYMAP 10 ipsec-isakmp crypto map
card crypto ONLYMAP 10 correspondence address sheep
card crypto ONLYMAP 10 set pfs group2
card crypto ONLYMAP 10 set peer LINKSYS_IP
crypto ONLYMAP 10 the transform-set LINKSYS_TS value card
map ONLYMAP 600-isakmp dynamic L2TP ipsec crypto
ONLYMAP interface card crypto outside

ISAKMP allows outside
ISAKMP key * address LINKSYS_IP netmask 255.255.255.255
ISAKMP key * address 0.0.0.0 netmask 0.0.0.0
ISAKMP identity address

part of pre authentication ISAKMP policy 10
ISAKMP policy 10 3des encryption
ISAKMP policy 10 sha hash
10 2 ISAKMP policy group
ISAKMP life duration strategy 10 86400

part of pre authentication ISAKMP policy 20
ISAKMP policy 20 3des encryption
ISAKMP policy 20 chopping sha
20 2 ISAKMP policy group
ISAKMP duration strategy of life 20 28800

VPDN group WINCLIENTS accept l2tp call
VPDN group ppp authentication pap WINCLIENTS
VPDN group WINCLIENTS client configuration address local VPNPool
VPDN group WINCLIENTS customer DNS_IP dns configuration
VPDN group customer WINCLIENTS of local authentication
VPDN Hello 60 of the l2tp tunnel of the WINCLIENTS group
VPDN username username password *.
VPDN allow outside

Furthermore, I don't play with this old code of 6.2. If it does not support NAT - T and the customer is behind the NAT device, it could cause the problem. Some NAT device has the VPN-passthrough feature, you can turn it on and try.

Router and VPN Client for Internet Public on a matter of stick

I try to follow the http://www.cisco.com/en/US/products/sw/secursw/ps2308/products_configuration_example09186a008073b06b.shtml to allow VPN clients to receive their internet connection instead of tunneling while split. Internal resources are available, but the internet does not work when a client is connected? It seems that the VPN clients are not translated.

!
crypto ISAKMP policy 3
BA 3des
preshared authentication
Group 2
!
crypto ISAKMP policy 10
preshared authentication
ISAKMP crypto key address x.x.x.x No.-xauth KeyString
!
ISAKMP crypto group customer VPN-users configuration
KeyString key
DNS 208.67.222.222 208.67.220.220
domain domain.com
pool VPN_POOL
include-local-lan
netmask 255.255.255.0
Crypto isakmp IKE-PROFILE profile
game of identity VPN-users group
client authentication list default
Default ISAKMP authorization list
initiate client configuration address
client configuration address respond
virtual-model 1
!
!
Crypto ipsec transform-set ESP-SHA-3DES esp - aes 256 esp-sha-hmac
!
Profile of crypto ipsec IPSEC_PROFILE1
game of transformation-ESP-3DES-SHA
Isakmp IKE PROFILE set
!
!
crypto dynamic-map 10 DYNMAP
game of transformation-ESP-3DES-SHA
market arriere-route
!
!
map CLIENTMAP client to authenticate crypto list by default
map CLIENTMAP isakmp authorization list by default crypto
crypto map CLIENTMAP client configuration address respond
map CLIENTMAP 1 ipsec-isakmp crypto
defined peer x.x.x.x
game of transformation-ESP-3DES-SHA
PFS Group1 Set
match address 100
map CLIENTMAP 10-isakmp dynamic DYNMAP ipsec crypto
!
Archives
The config log
hidekeys
!
!
controller T1 2/0
framing sf
friend linecode
!
property intellectual ssh authentication-2 retries
!
!
!
!
interface Loopback0
IP 192.168.100.1 address 255.255.255.0
no ip unreachable
IP nat inside
IP virtual-reassembly
!
!
Null0 interface
no ip unreachable
!
interface FastEthernet0/0
Description $ETH - WAN$ $FW_OUTSIDE$
IP address dhcp customer_id FastEthernet0/0 hostname 3725router
IP access-group 104 to
no ip unreachable
NAT outside IP
inspect the SDM_LOW over IP
sdm_ips_rule IP IP addresses in
IP virtual-reassembly
route SDM_RMAP_1 card intellectual property policy
automatic duplex
automatic speed
map CLIENTMAP crypto
!
interface Serial0/0
Description $FW_OUTSIDE$
the IP 10.0.0.1 255.255.240.0
IP access-group 105 to
Check IP unicast reverse path
no ip unreachable
inspect the SDM_LOW over IP
IP virtual-reassembly
Shutdown
2000000 clock frequency
map CLIENTMAP crypto
!
interface FastEthernet0/1
no ip address
no ip unreachable
IP virtual-reassembly
automatic speed
full-duplex
!
interface FastEthernet0/1.2
Description $FW_INSIDE$
encapsulation dot1Q 2
172.16.2.1 IP address 255.255.255.0
IP access-group 101 in
no ip unreachable
IP nat inside
IP virtual-reassembly
enable IPv6
!
interface FastEthernet0/1.3
Description $FW_INSIDE$
encapsulation dot1Q 3
172.16.3.1 IP address 255.255.255.0
IP access-group 102 to
no ip unreachable
IP nat inside
IP virtual-reassembly
enable IPv6
!
interface FastEthernet0/1.10
Description Vlan wireless comments
encapsulation dot1Q 100
172.16.100.1 IP address 255.255.255.0
IP access-group out 110
no ip unreachable
IP nat inside
IP virtual-reassembly
!
interface FastEthernet0/1.50
Description $Phones$
encapsulation dot1Q 50
IP 172.16.50.1 255.255.255.0
IP virtual-reassembly
!
interface Serial0/1
no ip address
no ip unreachable
Shutdown
2000000 clock frequency
!
interface Serial0/2
no ip address
Shutdown
!
interface Serial0/3
no ip address
Shutdown
!
interface Serial1/0
no ip address
Shutdown
!
BRI2/0 interface
no ip address
IP virtual-reassembly
encapsulation hdlc
Shutdown
!
type of interface virtual-Template1 tunnel
Description $FW_INSIDE$
IP unnumbered Loopback0
IP access-group 103 to
no ip unreachable
IP virtual-reassembly
ipv4 ipsec tunnel mode
Tunnel IPSEC_PROFILE1 ipsec protection profile
!
local IP 192.168.0.100 VPN_POOL pool 192.168.0.105
IP forward-Protocol ND
IP route 172.16.200.0 255.255.255.252 172.16.2.3
!
!
IP http server
local IP http authentication
IP http secure server
IP http timeout policy inactive 600 life 86400 request 10000
translation of nat IP udp-timeout 900
IP nat inside source map route SDM_RMAP_1 interface FastEthernet0/0 overload
!
logging source hostname id
record 172.16.3.3
access-list 100 permit ip 172.16.2.0 0.0.0.255 172.16.10.0 0.0.0.255
access-list 100 permit ip 172.16.2.0 0.0.0.255 172.31.12.0 0.0.0.255
Remark SDM_ACL category of access list 101 = 17
access-list 101 permit ahp any host 172.16.2.1
access-list 101 permit esp any host 172.16.2.1
access-list 101 permit udp any host 172.16.2.1 eq isakmp
access-list 101 permit udp any host 172.16.2.1 eq non500-isakmp
access-list 101 permit ip 172.31.12.0 0.0.0.255 172.16.2.0 0.0.0.255
access-list 101 deny ip 10.0.0.0 0.0.15.255 no matter what newspaper
access-list 101 deny ip 192.168.0.0 0.0.0.255 any what newspaper
access-list 101 deny ip 172.16.3.0 0.0.0.255 any what newspaper
access-list 101 deny ip 255.255.255.255 host no matter what paper
access-list 101 deny ip 127.0.0.0 0.255.255.255 any what newspaper
access-list 101 tcp refuse any any newspaper of chargen Place1
access-list 101 tcp refuse any any eq whois newspaper
access-list 101 tcp refuse any any eq 93 newspaper
access-list 101 tcp refuse any any newspaper of the 135 139 range
access-list 101 tcp refuse any any eq 445 newspaper
access-list 101 tcp refuse any any newspaper exec 518 range
access-list 101 tcp refuse any any eq uucp log
access list 101 ip allow a whole
access-list 101 deny ip 172.16.100.0 0.0.0.255 any what newspaper
access-list 102 deny ip 172.16.2.0 0.0.0.255 any what newspaper
access-list 102 deny ip 10.0.0.0 0.0.15.255 no matter what newspaper
access-list 102 deny ip 192.168.0.0 0.0.0.255 any what newspaper
access-list 102 refuse host 255.255.255.255 ip no matter what paper
access-list 102 deny ip 127.0.0.0 0.255.255.255 any what newspaper
access ip-list 102 permit a whole
access-list 103 deny ip 172.16.2.0 0.0.0.255 any
access-list 103 deny ip 10.0.0.0 0.0.15.255 everything
access-list 103 deny ip 172.16.3.0 0.0.0.255 any
access-list 103 refuse host ip 255.255.255.255 everything
access-list 103 deny ip 127.0.0.0 0.255.255.255 everything
103 ip access list allow a whole
Note access-list 104 SDM_ACL category = 17
access-list 104 allow the host ip 192.168.0.100 everything
access-list 104 allow the host ip 192.168.0.101 everything
access-list 104 allow the host ip 192.168.0.102 everything
access-list 104 allow the host ip 192.168.0.103 everything
104 allow host 192.168.0.104 ip access-list all
access-list 104 allow the host ip 192.168.0.105 everything
access-list 104. allow ip 172.16.10.0 0.0.0.255 172.16.2.0 0.0.0.255
access-list 104 allow host ip 192.168.0.100 172.16.0.0 0.0.255.255
access-list 104 allow host 192.168.0.101 ip 172.16.0.0 0.0.255.255
access-list 104 allow host 192.168.0.102 ip 172.16.0.0 0.0.255.255
access-list 104 allow host ip 192.168.0.103 172.16.0.0 0.0.255.255
access-list 104 allow host 192.168.0.104 ip 172.16.0.0 0.0.255.255
access-list 104 allow host ip 192.168.0.105 172.16.0.0 0.0.255.255
access-list 104. allow ip 172.31.12.0 0.0.0.255 172.16.2.0 0.0.0.255
access-list 104 permit udp host 205.152.132.23 eq field all
access-list 104 permit udp host 205.152.144.23 eq field all
Access-list 104 remark Auto generated by SDM for NTP 129.6.15.29 (123)
access-list 104 permit udp host 129.6.15.29 eq ntp ntp any eq
access-list allow 104 of the ahp an entire
access-list 104 allow esp a whole
access-list allow 104 a 41
access-list 104 permit udp any any eq isakmp
access-list 104 permit udp any any eq non500-isakmp
access-list 104 deny ip 10.0.0.0 0.0.15.255 no matter what newspaper
access-list 104 deny ip 172.16.2.0 0.0.0.255 any what newspaper
access-list 104 deny ip 192.168.0.0 0.0.0.255 any what newspaper
access-list 104 deny ip 172.16.3.0 0.0.0.255 any what newspaper
access-list 104 permit udp any eq bootps any eq bootpc
access-list 104 permit icmp any any echo response
access-list 104 permit icmp any one time exceed
access-list 104 allow all unreachable icmp
access-list 104 permit icmp any any echo
access-list 104 refuse icmp any any newspaper mask-request
access-list 104 refuse icmp any any redirect newspaper
access-list 104 deny ip 10.0.0.0 0.255.255.255 any what newspaper
access-list 104 deny ip 172.16.0.0 0.15.255.255 no matter what newspaper
access-list 104 deny ip 192.168.0.0 0.0.255.255 any what newspaper
access-list 104 deny ip 127.0.0.0 0.255.255.255 any what newspaper
104 refuse 224.0.0.0 ip access-list 15.255.255.255 no matter what newspaper
104 refuse host 255.255.255.255 ip access-list no matter what paper
access-list 104 tcp refuse any any newspaper of the range 6000-6063
access-list 104 tcp refuse any any eq newspaper 6667
access-list 104 tcp refuse any any 12345 12346 range journal
access-list 104 tcp refuse any any eq 31337 newspaper
access-list 104 deny udp any any eq 2049 newspaper
access-list 104 deny udp any any eq 31337 newspaper
access-list 104 deny udp any any 33400 34400 range journal
access-list 104 deny ip any any newspaper
Note access-list 105 SDM_ACL category = 17
access-list 105 allow the host ip 192.168.0.100 everything
access-list 105 allow the host ip 192.168.0.101 everything
access-list 105 allow the host ip 192.168.0.102 everything
access-list 105 allow the host ip 192.168.0.103 everything
access-list 105 192.168.0.104 ip host allow all
access-list 105 allow the host ip 192.168.0.105 everything
access-list 105 host ip 192.168.0.100 permit 172.16.0.0 0.0.255.255
access-list 105 host ip 192.168.0.101 permit 172.16.0.0 0.0.255.255
access-list 105 host ip 192.168.0.102 permit 172.16.0.0 0.0.255.255
access-list 105 host ip 192.168.0.103 permit 172.16.0.0 0.0.255.255
access-list 105 192.168.0.104 ip host permit 172.16.0.0 0.0.255.255
access-list 105 host ip 192.168.0.105 permit 172.16.0.0 0.0.255.255
access-list 105 allow ip 172.31.12.0 0.0.0.255 172.16.2.0 0.0.0.255
access-list 105 permit udp any host 10.0.0.1 eq non500-isakmp
access-list 105 permit udp any host 10.0.0.1 eq isakmp
access-list 105 allow esp any host 10.0.0.1
access-list 105 allow ahp any host 10.0.0.1
access-list 105 permit udp host 129.6.15.29 eq ntp host 10.0.0.1 eq ntp
access-list 105 allow ahp 10.0.0.2 10.0.0.1 host
access-list 105 allow esp 10.0.0.2 10.0.0.1 host
access-list 105 permit udp host 10.0.0.2 10.0.0.1 host eq isakmp
access-list 105 permit udp host 10.0.0.2 10.0.0.1 host eq non500-isakmp
access-list 105 allow ip 172.16.10.0 0.0.0.255 172.16.2.0 0.0.0.255
access-list 105 permit udp host 10.0.0.2 host 172.16.2.10 eq tftp
access-list 105 permit udp host 10.0.0.2 host 172.16.2.5 eq syslog
access-list 105 deny ip 172.16.2.0 0.0.0.255 any
access-list 105 deny ip 192.168.0.0 0.0.0.255 any
access-list 105 deny ip 172.16.3.0 0.0.0.255 any
access-list 105 permit icmp any host 10.0.0.1 echo-reply
access-list 105 permit icmp any host 10.0.0.1 exceeded the time
access-list 105 permit icmp any host 10.0.0.1 inaccessible
access-list 105 deny ip 10.0.0.0 0.255.255.255 everything
access-list 105 deny ip 172.16.0.0 0.15.255.255 all
access-list 105 deny ip 192.168.0.0 0.0.255.255 everything
access-list 105 deny ip 127.0.0.0 0.255.255.255 everything
105 refuse host 255.255.255.255 ip access-list all
access-list 105 refuse host ip 0.0.0.0 everything
access-list 105 deny ip any any newspaper
access-list 110 deny ip 172.16.2.0 0.0.0.255 any
access-list 110 deny ip 172.16.3.0 0.0.0.255 any
access ip-list 110 permit a whole
access-list 115 permit ip 172.16.0.0 0.0.255.255 everything
access-list 115 permit ip 192.168.0.0 0.0.0.255 any
access-list 120 deny ip 172.16.0.0 0.0.255.255 192.168.0.0 0.0.0.255
access-list 120 allow ip 172.16.0.0 0.0.255.255 everything
access-list 150 deny ip 172.16.0.0 0.0.255.255 host 192.168.0.100
access-list 150 deny ip 172.16.0.0 0.0.255.255 welcome 192.168.0.101
access-list 150 deny ip 172.16.0.0 0.0.255.255 welcome 192.168.0.102
access-list 150 deny ip 172.16.0.0 0.0.255.255 welcome 192.168.0.103
access-list 150 deny ip 172.16.0.0 0.0.255.255 welcome 192.168.0.104
access-list 150 deny ip 172.16.0.0 0.0.255.255 welcome 192.168.0.105
access-list 150 deny ip 172.16.2.0 0.0.0.255 172.31.12.0 0.0.0.255
access-list 150 permit ip 172.16.2.0 0.0.0.255 any
access-list 150 permit ip 172.16.3.0 0.0.0.255 any
access-list 150 permit ip 192.168.0.0 0.0.0.255 any
public RO SNMP-server community
IPv6 route: / 0 Tunnel0
!
!
!
allowed SDM_RMAP_1 1 route map
corresponds to the IP 150
set ip next-hop 192.168.100.2
!
SDM_RMAP_1 allowed 10 route map
corresponds to the IP 150
set ip next-hop 192.168.100.2

Based on my own tests in the laboratory, you can do this with and without a routing policy. You can configure the road of politics on the virtual template interface and direct traffic to the closure where ip nat inside is enabled, or you can simply configure ip nat inside on the interface of virtual model and remove the routing strategy.

crypto ISAKMP policy 3
BA 3des
preshared authentication
Group 2

ISAKMP crypto cisco123 key address 0.0.0.0 0.0.0.0

ISAKMP crypto group customer VPN-users configuration
key cisco123
DNS 208.67.222.222 208.67.220.220
domain domain.com
pool VPN_POOL
include-local-lan
netmask 255.255.255.0
Crypto isakmp IKE-PROFILE profile
game of identity VPN-users group
client authentication list default
Default ISAKMP authorization list
initiate client configuration address
client configuration address respond
virtual-model 1

Crypto ipsec transform-set ESP-SHA-3DES esp - aes 256 esp-sha-hmac

Profile of crypto ipsec IPSEC_PROFILE1
game of transformation-ESP-3DES-SHA
Isakmp IKE PROFILE set

crypto dynamic-map 10 DYNMAP
game of transformation-ESP-3DES-SHA
market arriere-route
!
!
map CLIENTMAP 10-isakmp dynamic DYNMAP ipsec crypto

interface GigabitEthernet0/0
IP 1.1.1.1 255.255.255.0
NAT outside IP
IP virtual-reassembly
automatic duplex
automatic speed
media type rj45
map CLIENTMAP crypto

type of interface virtual-Template1 tunnel
IP unnumbered GigabitEthernet0/0
IP nat inside
IP virtual-reassembly
ipv4 ipsec tunnel mode
Tunnel IPSEC_PROFILE1 ipsec protection profile

local IP 192.168.0.100 VPN_POOL pool 192.168.0.105

overload of IP nat inside source list 150 interface GigabitEthernet0/0

access-list 150 deny ip 172.16.0.0 0.0.255.255 host 192.168.0.100
access-list 150 deny ip 172.16.0.0 0.0.255.255 welcome 192.168.0.101
access-list 150 deny ip 172.16.0.0 0.0.255.255 welcome 192.168.0.102
access-list 150 deny ip 172.16.0.0 0.0.255.255 welcome 192.168.0.103
access-list 150 deny ip 172.16.0.0 0.0.255.255 welcome 192.168.0.104
access-list 150 deny ip 172.16.0.0 0.0.255.255 welcome 192.168.0.105
access-list 150 deny ip 172.16.2.0 0.0.0.255 172.31.12.0 0.0.0.255
access-list 150 permit ip 172.16.2.0 0.0.0.255 any
access-list 150 permit ip 172.16.3.0 0.0.0.255 any
access-list 150 permit ip 192.168.0.0 0.0.0.255 any

***************************************************************************************

Inside global internal local outside global local outdoor Pro
ICMP 1.1.1.1:1 192.168.0.102:1 4.2.2.2:1 4.2.2.2:1

GRE and IPSEC VPN tunnel over the same interface

My client is currently connected to a service provider of call through a GRE Tunnel over IPSEC. They chose to move all connections to a VPN site-to-site traditional behind a firewall, here, to your corp office. As the questions says, is possible for me to put in place the VPN site to site on the same router? Interface Tunnelx both ethernet have the same encryption card assigned to the destination router. I thought that traffic could divide by identification of traffic 'interesting '. Thanks for all the ideas, suggestions

Ray

Ray

Thanks for the additional information. It takes so that the existing entries in ACL 101 remain so the existing tunnel will still work. And you have to add entries that will allow the new tunnel. Editing an ACL that is actively filtering traffic can get complicated. Here is a technique that I use sometimes.

-create a new access list (perhaps ACL 102 assuming that 102 is not already in use).

-Copy the entries of ACL 101 to 102 and add additional entries you need in places appropriate in the ACL.

-Once the new version of the ACL is complete in the config, then go tho the interface and change the ip access-group to point to the new ACL.

This provides a transition that does not affect traffic. And he made it back to the original easy - especially if something does not work as expected in the new ACL.

If the encryption of the remote card has an entry for GRE and a separate entrance for the IPSec which is a good thing and should work. I guess card crypto for GRE entry specifies an access list that allows the GRE traffic and for IPSec crypto map entry points to a different access list that identifies the IP traffic is encrypted through the IPSec tunnel.

HTH

Rick

Crypto ACL

Hello

Any body knows if it s possible to configure the service in crypto ACL?

Something like that:

Crypto list access permit tcp host 1.1.1.1 1.1.1.1 eq 23

How will be the crypto ACL on the other side?

I apologise for the misunderstanding what kind of device you have.

with pix v6.x, you can disable the command "sysopt connection permit-ipsec. When this command is enabled (on by default), pix will ignore any acl with encrypted traffic.

so to disable this command, create an inbound acl, apply the acl to the external interface, and let the No. - nat and crypto such acl what.

for example

access-list 101 permit ip 192.168.1.0 255.255.255.0 192.168.2.0 255.255.255.0

access-list 120 allow ip 192.168.1.0 255.255.255.0 192.168.2.0 255.255.255.0

access-list 111 permit tcp 192.168.2.0 255.255.255.0 host 192.168.1.100 eq 23

(Inside) NAT 0-list of access 101

Access-group 111 in external interface

myvpn 10 ipsec-isakmp crypto map

correspondence address card crypto myvpn 10 120

card crypto myvpn 10 set by peer

card crypto myvpn 10 transform-set RIGHT

Multiple Crypto cards on simple external Interface

Hi, I got the following encryption card configured on my ASA5505 to allow Cisco IPSec VPN clients to connect from the outside:

crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 pfs Group1 set

Crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 value transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA MD5-ESP-3DES ESP-DES-SHA ESP-DES-MD5

outside_map card crypto 65535-isakmp dynamic ipsec SYSTEM_DEFAULT_CRYPTO_MAP

outside_map interface card crypto outside

I'm now trying to set up a map of additional encryption - a static configuration to establish a tunnel with Windows Azure services. The configuration, they gave me is:

Crypto map Azur-crypto-map 10 correspondence address azure-vpn-acl

crypto azure-crypto-card card game 10 peers XXX.XXX.XXX.XXX (hidden)

card crypto azure-crypto-map 10 set transform-set of Azur-ipsec-proposal-set

Azur-crypto-card interface card crypto outside

However, when I apply this configuration, my Cisco IPSec clients can connect is no longer. I think that my problem is that last line:

Azur-crypto-card interface card crypto outside

that blows away my original line:

outside_map interface card crypto outside

It seems that I'm stuck with just picking one of the maps to apply to the external interface. Is there a way to apply both of these cards to the external interface to allow the two IPSec tunnels to create? We lack ASA version 8.4 (7) 3.

Hello

You can use the same "crypto map"

Just add

card crypto outside_map 10 correspondence address azure-vpn-acl

crypto outside_map 10 card game peers XXX.XXX.XXX.XXX (hidden)

card crypto outside_map 10 set transform-set of Azur-ipsec-proposal-set

Your dynamic VPN Clients will continue to work very well that their statements "crypto map" are in the order of precedence / low in "crypto map" configurations (65535) and VPN L2L is higher (10)

And I want to say with the above is that, where a connection VPN L2L is formed from the remote end it will be naturally VPN L2L configurations you have with the number of configurations "crypto map" '10'. Then when a VPN Client connects it naturally will not match the specific configurations of the number "10" and will move to the next entry and the match (65535)

If you happen to set up a new connection VPN L2L then you might give him the number "11" for example and it would still be fine.

Hope this helps

-Jouni

Card crypto applied to the Vlan Interface of the 1841 router

Currently, our 1841 router has a T1 connected to the WIC T1, Comcast Cable connected to Fa0/0 and the local network connected to Fa0/1. Tuesday, our 1841 will have an ethernet connection to a new gateway router instead of use the WIC T1. I added a 4-port ethernet module to the router in the anticipation of this change. Since the 4-port module is not layer 3 capable, I created a virtual local area network so that I can address the Vlan with the IP address that has been previously configured on the WIC T1. My goal is to move our IPSec vpn tunnel interface series interface vlan newly created. I was able to add all orders of the interface vlan, but I wanted to make sure that when the time comes to make the transition, the tunnel will be actually get when it is configured on an interface vlan that is then assigned to one of the four ethernet ports in the add-on. Has anyone done this or seen that fact? Potential drawbacks? Thank you very much!

Hello

Crypto-map is compatible with the IVR, so if everything else is in place, it does not work.

HTH

Laurent.

ACL IPSEC - CRYPTO vs Interface

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