Dynamic routing for VPN Failover L2L

Hello

Can someone offer me some advice on this please?

I have attached a simple diagram of our EXTENSIVE referral network.

Overview

  • The firewall is ASA 5510 running 8.4 (9)
  • Basic to the Headquarters network uses OSPF
  • On ASA static routes are redistributed into OSPF
  • On ASA for VPN static routes are redistributed into OSPF with 130 metric so redistributed BGP routes are preferred
  • Basic network has a static route to 10.0.0.0/8 to Corporate WAN, which is redistributed into OSPF
  • Branch Office WAN uses BGP - routes are redistributed into OSPF
  • The branch routers using VRRP for redundancy of the IP for the default gateway of local customers.
  • Branch router main past off VRRP IP to router backup when the WAN interface is down
  • BO backup router (. 253) contains only a default route to the internet
  • In normal operation, the traffic to and from BO uses Local Branch Office WAN
  • If local BO WAN link fails, traffic to and from the BO uses IPSec VPN via public Internet

I try to configure dynamic routing on our network for when a branch switches to the IPsec VPN. What I want to happen (not sure if it is possible) is for the ASA announce the subnet to the remote end of the VPN in OSPF to Headquarters.

I managed to get this working using IPP, but for some reason any VPN stay up all the time when we are not in a failover scenario. This causes the ASA added the table as a static route is the remote subnet in it and do not use the announced route of OSPF from the core network. This prevents the BO customers access to the Internet. If I remove the IPP on the VPN setting, ASA learns the route to the subnet via the WAN BO - resumes normal operation.

I have configured the metric of the static routes that get redistributed into OSPF by ASA superior to 110. This is so that the routes redistributed by the WAN BO OSPF BGP, are preferred. The idea being that when the WAN link is again available, the routing changes automatically and the site fails to WAN BO.

I guess what I need to know is; This design is feasible, and if so where I'm going wrong?

Thank you

Paul

Hi Paul,.

your ASA maintains the tunnel alive only because this path exists on ASA.  This is why you must use IP - SLA on ASA to push network taffic "10.10.10.0/24" based on the echo response, using the ALS-intellectual property

Please look at the example below, in the example below shows that the traffic flows through the tunnel, only if the ASA cannot reach the 10.10.10.0/24 network via the internal network of HQ.

This configuration illuminate ASA.

Route inside 10.10.10.0 255.255.2550 10.0.0.2 track 10

(assuming 10.0.0.2 ip peering from inside the ip address of the router to HO)

Route outside 10.10.10.0 255.255.255.0 xxx.xxx.xxx.xxx 254

(value of 254 is a more expensive route to go via IPSec tunnel and x = the bridge by default-ISP)

ALS 99 monitor

type echo protocol ipIcmpEcho 10.10.10.254 inside interface

NUM-package of 3

frequency 10

Annex monitor SLA 99 life never start-time now

track 10 rtr 99 accessibility

Let me know, if this can help.

Thank you

Rizwan James

Tags: Cisco Security

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    access-list InternalForClientVPNSplitTunnel remark Rackspace

    access-list InternalForClientVPNSplitTunnel standard permit 164.177.132.16 255.255.255.252

    access-list InternalForClientVPNSplitTunnel remark Rackspace

    access-list InternalForClientVPNSplitTunnel standard permit 164.177.132.72 255.255.255.252

    access-list InternalForClientVPNSplitTunnel remark Rackspace

    access-list InternalForClientVPNSplitTunnel standard permit 212.64.147.184 255.255.255.248

    pager lines 24

    logging enable

    logging console debugging

    logging monitor debugging

    logging buffered debugging

    logging trap debugging

    logging asdm warnings

    logging from-address [email protected]/* */

    logging recipient-address [email protected]/* */ level errors

    mtu inside 1500

    mtu outside 1500

    ip local pool CiscoVPNDHCPPool 192.168.2.130-192.168.2.149 mask 255.255.255.0

    ip verify reverse-path interface inside

    ip verify reverse-path interface outside

    ipv6 access-list inside_access_ipv6_in permit tcp any any eq www

    ipv6 access-list inside_access_ipv6_in permit tcp any any eq https

    ipv6 access-list inside_access_ipv6_in permit tcp any any eq ssh

    ipv6 access-list inside_access_ipv6_in permit icmp6 any any

    icmp unreachable rate-limit 1 burst-size 1

    icmp permit any outside

    no asdm history enable

    arp timeout 14400

    global (outside) 1 interface

    nat (inside) 0 access-list inside_nat0_outbound

    nat (inside) 1 0.0.0.0 0.0.0.0

    static (inside,outside) tcp interface www dev.skiddle.internal www netmask 255.255.255.255

    static (inside,outside) tcp interface ssh dev.skiddle.internal ssh netmask 255.255.255.255

    access-group inside_access_in in interface inside control-plane

    access-group inside_access_in_1 in interface inside

    access-group inside_access_ipv6_in in interface inside

    access-group outside_access_in in interface outside

    route outside 0.0.0.0 0.0.0.0 192.168.3.254 10

    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 sip-provisional-media 0:02:00 uauth 0:05:00 absolute

    timeout tcp-proxy-reassembly 0:01:00

    timeout floating-conn 0:00:00

    dynamic-access-policy-record DfltAccessPolicy

    aaa authentication telnet console LOCAL

    aaa authentication enable console LOCAL

    http server enable 4433

    http 192.168.1.0 255.255.255.0 inside

    http 192.168.2.0 255.255.255.0 inside

    no snmp-server location

    no snmp-server contact

    snmp-server enable traps snmp authentication linkup linkdown coldstart

    crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac

    crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac

    crypto ipsec transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac

    crypto ipsec transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac

    crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac

    crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac

    crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac

    crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac

    crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac

    crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac

    crypto ipsec security-association lifetime seconds 86400

    crypto ipsec security-association lifetime kilobytes 4608000

    crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set pfs group1

    crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set 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 ESP-3DES-MD5 ESP-DES-SHA ESP-DES-MD5

    crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set security-association lifetime seconds 28800

    crypto map outside_map 1 match address RACKSPACE-cryptomap_1

    crypto map outside_map 1 set pfs

    crypto map outside_map 1 set peer 94.236.41.227

    crypto map outside_map 1 set transform-set ESP-AES-128-SHA

    crypto map outside_map 1 set security-association lifetime seconds 86400

    crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP

    crypto map outside_map interface outside

    crypto ca trustpoint _SmartCallHome_ServerCA

    crl configure

    crypto ca certificate chain _SmartCallHome_ServerCA

    certificate ca xxx

    quit

    crypto isakmp enable outside

    crypto isakmp policy 10

    authentication crack

    encryption aes-256

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 20

    authentication rsa-sig

    encryption aes-256

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 30

    authentication pre-share

    encryption aes-256

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 40

    authentication crack

    encryption aes-192

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 50

    authentication rsa-sig

    encryption aes-192

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 60

    authentication pre-share

    encryption aes-192

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 70

    authentication crack

    encryption aes

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 80

    authentication rsa-sig

    encryption aes

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 90

    authentication pre-share

    encryption aes

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 100

    authentication crack

    encryption 3des

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 110

    authentication rsa-sig

    encryption 3des

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 120

    authentication pre-share

    encryption 3des

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 130

    authentication crack

    encryption des

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 140

    authentication rsa-sig

    encryption des

    hash sha

    group 2

    lifetime 86400

    crypto isakmp policy 150

    authentication pre-share

    encryption des

    hash sha

    group 2

    lifetime 86400

    telnet 192.168.1.0 255.255.255.0 inside

    telnet 192.168.2.0 255.255.255.0 inside

    telnet timeout 5

    ssh timeout 5

    console timeout 0

    dhcpd auto_config outside

    !

    dhcprelay server 192.68.2.200 inside

    threat-detection basic-threat

    threat-detection scanning-threat

    threat-detection statistics host

    threat-detection statistics access-list

    threat-detection statistics tcp-intercept rate-interval 30 burst-rate 400 average-rate 200

    ntp server 194.35.252.7 source outside prefer

    webvpn

    port 444

    svc image disk0:/anyconnect-macosx-i386-2.4.1012-k9.pkg 1 regex "Intel Mac OS X"

    group-policy DfltGrpPolicy attributes

    vpn-tunnel-protocol IPSec webvpn

    group-policy skiddlevpn internal

    group-policy skiddlevpn attributes

    dns-server value 192.168.2.200

    vpn-tunnel-protocol IPSec l2tp-ipsec

    split-tunnel-policy tunnelspecified

    split-tunnel-network-list value InternalForClientVPNSplitTunnel

    default-domain value skiddle.internal

    username bensebborn password *** encrypted privilege 0

    username bensebborn attributes

    vpn-group-policy skiddlevpn

    username benseb password gXdOhaMts7w/KavS encrypted privilege 15

    tunnel-group 94.236.41.227 type ipsec-l2l

    tunnel-group 94.236.41.227 ipsec-attributes

    pre-shared-key *****

    tunnel-group skiddlevpn type remote-access

    tunnel-group skiddlevpn general-attributes

    address-pool CiscoVPNDHCPPool

    default-group-policy skiddlevpn

    tunnel-group skiddlevpn ipsec-attributes

    pre-shared-key *****

    !

    class-map inspection_default

    match default-inspection-traffic

    !

    !

    policy-map type inspect dns preset_dns_map

    parameters

    message-length maximum client auto

    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 rsh

    inspect rtsp

    inspect esmtp

    inspect sqlnet

    inspect skinny

    inspect sunrpc

    inspect xdmcp

    inspect sip

    inspect netbios

    inspect tftp

    inspect ip-options

    policy-map global-policy

    class inspection_default

    inspect icmp

    inspect icmp error

    inspect ipsec-pass-thru

    inspect ftp

    !

    service-policy global_policy global

    smtp-server 164.177.128.203

    prompt hostname context

    call-home reporting anonymous

    Cryptochecksum:6c2eb43fa1150f9a5bb178c716d8fe2b

    : end

    You must even-Security-enabled traffic intra-interface to allow communication between vpn VPN.

    With respect,

    Safwan

    Remember messages useful rate.

  • PIX and ASA static, dynamic and RA VPN does not

    Hello

    I am facing a very interesting problem between a PIX 515 and an ASA 5510.

    The PIX is in HQ and has several dynamic VPN connections (around 130) and IPsec vpn remote works very well. I had to add a PIX to ASA L2L VPN static and it does not work as it is supposed to be. The ASA 5510, at the remote end, connects and rest for a small period of time, however, all other VPN connections stop working.

    The most interesting thing is that ASA is associated with the dynamic map and not the static map that I created (check by sh crypto ipsec his counterpart x.x.x.x). However, if I make any changes in the ACL 'ACL-Remote' it affects the tunnel between the PIX and ASA.

    Someone saw something like that?

    Here is more detailed information:

    HQ - IOS 8.0 (3) - PIX 515

    ASA 5510 - IOS 7.2 (3) - remote provider

    Several Huawei and Cisco routers dynamically connected via ADSL

    Several users remote access IPsec

    A VPN site-to site static between PIX and ASA - does not.

    Here is the config on the PIX:

    Crypto ipsec transform-set ESP-3DES-ESP-SHA-HMAC-IPSec esp-3des esp-sha-hmac

    Dyn - VPN game 100 Dynamics-card crypto transform-set ESP-3DES-ESP-SHA-HMAC-IPSec

    Crypto dynamic-map Dyn - VPN 100 the value reverse-road

    VPN - card 30 crypto card matches the ACL address / remote

    card crypto VPN-card 30 peers set 20 x. XX. XX. XX

    card crypto VPN-card 30 the transform-set ESP-3DES-ESP-SHA-HMAC-IPSec value

    VPN crypto card - 100 - isakmp dynamic Dyn - VPN ipsec

    interface card crypto VPN-card outside

    crypto ISAKMP allow outside

    crypto ISAKMP policy 10

    preshared authentication

    3des encryption

    md5 hash

    Group 2

    life 86400

    crypto ISAKMP policy 65535

    preshared authentication

    3des encryption

    sha hash

    Group 2

    life 86400

    access list ACL-remote ext ip 10.0.0.0 allow 255.255.255.0 192.168.1.0 255.255.255.0

    Thank you.

    Marcelo Pinheiro

    The problem is that the ASA has a crypto acl defined between host and network, while the remote end has to the network.

    Make sure that the acl is reversed.

  • PIX515 &amp; dynamic routing

    Central office:

    LAN - 10.20.0.0 255.255.255.0

    PIX 515 - int branches - branches (through the cloud of MPLS VPN)

    internal int - LAN

    int outdoors - WAN

    Branch:

    LAN - 10.20.16.0.255.255.255.0

    C1760 - int s0/0 - Central officr (through the cloud of MPLS VPN)

    PIX501 - int outdoors - WAN

    internal int - LAN

    The PIX515, I had a static route to the path to service-

    Route of the branches 10.20.16.0 255.255.255.0 192.168.16.1 1

    I want up VPN channel between PIX501 (int outside) of the Executive Board and the Central PIX515(int outside).

    To do this, I created card crypto to PIX515 and ACL:

    outside_crypto_map_10 ip 10.20.0.0 access list allow 255.255.255.0 10.20.16.0 255.255.255.0

    card crypto 10 TEST matches the address outside_crypto_map_10

    Here my question: I want to remove static route of PIX515 and use dynamic routing, but I hesitated because I have ACLs for VPN, where branch destination LAN (and will serve as an int on the outside) and dynamic road that shows the way to the domestic LAN through branches int PIX515. How this will be live together? And what will be used first - road or ACL?

    The PIX can run RIP and OSPF today, but not those of a VPN. If you want to learn routes dynamically through the VPN you can do that, so you need to use static routes instead. Looks like you might be interested by the DMVPN function in IOS routers.

    Routing, regarding all the traffic that you want to use a VPN must first be routed on an interface that has the appropriate encryption card applied, then if this traffic matches an ACL encryption card it will be encrypted and sent to the corresponding VPN peer. That's to say routing goes first for the outbound VPN traffic, then encryption. No matter if channels are static or learned dynamically, except, as I mentioned above, you can now run a routing through a VPN Protocol in the PIX.

    Does that help?

  • VPN failover between the ASA

    I do a search in the search of the best solution for switching between two ASA and hoped that someone wants to point me in the right direction.

    The situation is this, we got:

    -Head Office 2:

    Each is equipped with an ASA 5505

    -10 branches

    Each is equipped with a 887 integrated services router.

    Each is BranchOffice must have a redundant VPN connection at the headquarters of these two, and they all need to use the first person as main and the other in high school. In case of failure, all branches need to use the second connection VPN going the second seat.

    In my research, I'm looking for the best possible solution, with faster failover, but have no idea where to start my research.

    I hope someone has a good answer for this one.

    Thank you very much in advance,

    Kind regards

    Dwayne

    I do not understand why people continue to use ASA devices for VPN endpoint.  the ASA is NOT designed for complex VPN scenarios.  It is designed for simple scenarios.  In terms of VPN by using comparison, ASA is a person with a basic education while Cisco IOS is like a person with a college degree.

    For the scenario, you will be much better using Cisco IOS routers everywhere, where you can implement the GRE/IPSec or DMVPN.  Both cases will be sastify to your needs.

  • S2S VPN Failover

    In the case where we have 2 routers each with a WAN link provided by the only ISP we can configure HSRP with SSO for the classical solutions IPSEC failover. But in a case where there are 2 routers but differ from the WAN links (services provider) we will not be able to use HSRP because the IP (subnet) will be different and assign a virtual ip address that is impossible.

    In this case, this type of the best possible solution for the recovery of link to function? ASIT with cryptographic cards? because in this case we can do 2 tunnels each with different source and IPSLA or dynamic routing routes of change for a failover.

    If you want to route based on the source IP address that some sources are going through the tunnel and not others?

    That could be solved with the policy based routing.

    --
    Don't stop once you have upgraded your network! Improve the world by lending money to low-income workers:
    http://www.Kiva.org/invitedBy/karsteni

  • Please help to configure the router for internet connection 871W!

    Hello world!

    I just started styding for CCNA, so I'm totally new to Cisco stuff. Recently bought a router 871W and spent two days in a row trying to configure internet connection with no luck! I use the port console for the configs and SDM/CCP. Would be greateful if someone could tell me how to do simple configs of internet connection. I googled everything but it's still confusing. I can't assing all-IP ports FA 0-3. I used instead of the VLAN. But all tutorials use FA0 and when I try to assign an IP address to FA0 it gives me some L2 cannot be assigned or something... :/ And I am also confused at what address IP use for WAN.

    I connected the cable between the Modem and the LAN of the PC port and copied some IP addresses which I think I have to use to configure the router for internet connection. And here they are:

    ISP IP: 76.114.54.255

    SUBNET: 255.255.248.0

    GATEWAY: 76.114.48.1

    DHCP: 69.252.97.4

    DNS: 75.75.75.75

    75.75.76.76

    If you can, please help! Thank you!

    Hi david,

    Looks like your 871w can not get a dynamic IP address: % unknown DHCP problem... No possible allocation

    you could ask your ISP to perform a reset/clear MAC add and try again?

    also, kindly post lastest "show run".

    Edit: just to see you've updated your screenshot. could you add command under 4

    Mac-add 0001.4af9.8b83

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