routing on IPSEC protocols

Similar Questions

• QoS and routing VPN IPSEC protocols

  Hello world

  You must confirm if the QOS is usable on IPSEC Site to site VPN?

  IPSEC VPN it can also participate in routing protocols.

  Example of

  An address 192.168.10.1 site source

  B Source 192.168.10.2 site address

  Now for Site A to Site B IPSEC to join a way is that we can use our ISP as static IP address

  Site has

  192.168.10.2 255.255.255.0 address 10.x.x.x ISP

  Using routing protocols

  Is it possible to use OSPF between two sites and advertise routes in OSPF?

  Will they see each other as ospf neis?

  Thank you

  MAhesh

  Hello Manu,

  Yes, we can do,

  Let me provide you with the following information:

  On the quality of service

  http://www.Cisco.com/en/us/products/ps6120/products_configuration_example09186a008080dfa7.shtml

  On OSPF

  http://www.Cisco.com/en/us/products/HW/vpndevc/ps2030/products_configuration_example09186a00804acfea.shtm

• Cisco router 892 IPSec initiator?

  Hi all!

  I have the IPSec tunnel between Cisco router 892 (c890-universalk9 - mz.154 - 3.M4.bin) and Cisco PIX 515E (ver. 8.0 (4) 28) with 5 subnets behind PIX.

  PIX configured to deal with two-way-type of connection, but router support not =)

  So, when I generate intresting hosts behind the router traffic IPSec does not work. When I generate traffic hosts behind PIX , everything works, but I need to be initiator on the side of the router :-(

  Is there a way to make my initiator 892 tunnel Cisco IPSec router to work with Cisco PIX / ASA?

  I'm afraid I should replace the router to another device = (())

  Thank you!

  Hi Yura Kazakevich,

  Try to enable pfs on the router:

  map SDM_CMAP_1 1 ipsec-isakmp crypto

  Set of pfs

  Hope this info helps!

  Note If you help!

  -JP-

• How the router can understand protocols such as SSH or telnet

  How the router can understand protocols such as SSH or telnet
  and device for layer 3 router

  second question, I found this accessory of CCNA security book Keith Barker
  wrote it router look at application layer information how?

  Thank you in advance.

  Hello

  I think that confuse you routing process.

  Router; route packages using their layer 3 address.

  This means not router cannot understand the upper layer protocols. There just transmission by addressess of layer 3.

  for example: we can define Access-list for tcp and udp layer 4 packets. router can decide whether to permit or refuse even if these lists filter by glance in the section layer 4 of the package.

  In an SSH or Telnet session, role of the router is terminal.

  Intermediate device belongs in the the router routing process.

  Best regards.

• Allow the Ipsec Protocol in ISP

  Hi guys,.

  I am trying to establish a site-to-site ipsec tunnel. I asked the ISP to allow the Protocol ip between an aet B site.

  I would like to know if ISP open it Ip Protocol if it passes all the required protocol ipsec tunnel and for that I need to ask them to open SPECIFIC protocols below

  50 - encapsulation header (ESP)

  51 - authentication Header (AH)

  500/udp - Internet Key Exchange (IKE)

  4500/udp - NAT traversal

  Thanks in advance

  Just to clarify Javier is correct, IPsec is the layer 3 protocol to which ESP and AH belong, not IP.
  

  Sorry to disagree with you and Javier (this time).

  ESP is an encapsulation over IP (IP-protocol is 50). So your rug will be what ETH-IP-ESP. TCP (Protocol IP-6) is also at the top of the intellectual property, the battery will be ETH-IP-TCP. The two (and IP GRE/47, AH IP/51, IP ICMP/1...) share the same IP protocol.

  If ESP and AH was not based on intellectual property, but something else, they could not be routed through an IP network.

  And if you use an ACL with "license ip any any", all of these protocols are included. Plese try it in a laboratory to make sure that.

  --
  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

• Routing VPN Ipsec

  Morning,

  I have an ASA 5520 of Cisco running 8.4 (5). When to use a VPN ipsec client and it connects to the local network, how the connection interprets her return flights. Currently, I have all my servers pointing to the front door on our old firewall. I have a different gateway on the new Cisco firewall. It is a transitional phase we are permanently than one Cisco ASA 5520 firewall. For testing purposes, we want to test the configuration of the VPN client with our front Radius Server cut us above. Test users must connect to resources on the corporate network. Should I put a route on the old firewall so when packets hit VPN servers they will know how to return to the VPN tunnel or the source and destination address will already be taken into account when the tunnel VPN hits the server, packages will return to the tunnel. The Cisco VPN client does not NAT configuration. Once we feel that the test is passed, we will change the gateway from the Cisco ASA 5520 to match the existing bridge for all resources on the network.

  Information or advice would be greatly appreciated?

  Thank you

  Carlos

  On the SAA, you set up a pool of IP addresses for the client. This pool should be aligned on the subnet boundaries. On your infrastructure (L3 switch or your old firewall), you tricky staric asa for this pool-network. Thereby the packages of answer-VPN-will flow to the ASA.

  Sent by Cisco Support technique iPad App

• Router Cisco IPsec VPN client

  Hello

  I would like if it is possible to make the IPsec VPN connection as a customer.

  ISP router (VDSL connection)

  <--->Cisco 887 <---->pc more with conditional redirection

  VPN router (as strongVPN)

  Thank you for your help.

  Best regards

  Hi Bruno.

  Yes the IOS router may be a VPN client, it is called easy VPN:

  How to configure Easy VPN Cisco IOS (server and client)

  * The server must be a Cisco device such as another router or an ASA.

  Keep me posted.

  Thank you.

  Portu.

  Please note all useful messages.

• Try to route all ipsec traffic

  Hello

  Can anyone help me please with config below. I am trying to route all traffic (web browsing) by the router.

  For now I can connect to the vpn and browse the network, but users cannot resolve web pages (page loading without end). If I activate split tunnel web browsing works but not what I'm used to.

  LAN pool 192.168.10.0/24

  local pool 192.168.20.0/24

  I assume it has something with ACL and NAT, but I can't understand that.

  Config is attached.

  Thank you.

  I think your config should work.

  The router which model is it and what version of software you are running?

• Need for visibility on the IPsec protocol: aggressive Mode

  Hello

  I have a few doubts about VPN. I already went through a large number of documents. Everybody says something I don't agree with. So please don't view this kind of material in your answer.

  Aggressive mode: what I know, there are 3 Exchange for aggressive mode. Initiator in the first message sends the ID parameters, DH, HIS (IP address, domain name FULL). Then the answering machine (2nd MSG) reacts with the SA settings, DH, ID, HASH_R, then the initiator (3rd MSG) responds with HASH_I and PHASE 1 is established here.

  As the initiator and the responder IDs are sent in clear text, so we say that aggressive mode is not course.

  DH is used to exchange keys between peers. DH, negotiates and then generate a SECRET_KEY which in turn, is used to encrypt the symmetric key. We have SA parameters for encryption, hash, authentication.

  Here are my questions:

  (a) all of ITS parameters, IDs, DH traded first and second messages. The third message from the initiator is to send to HASH_I. Now, I don't see at all any use of DH in this mode, no encryption (payload ISAKAMP is not encrypted).  A single phase 1 aims to build a secure layer of management so that the PHASE connection 2 (data connection) may establish under a secure layer (PHASE 1). Now, I see that in aggressive mode we are not able to achieve this secure layer. So, what's the point of having encryption algorithms and DH in PHASE 1 if they are never used? Instead of skip PHASE 1 and we can have the PFS in Phase 2 for serving as a DH and we were hashing algorithms, encryption too.

  (b) the PRE SHARED KEY is actually shared via connect using the DH? Or just a HASH of PRE-SHARED-KEY is generated and sent on the connection for authentication?

  (c) why the aggressive mode can be used for dynamic addressing and not the main mode?

  If please answer queries and correct me if I am wrong somewhere.

  Thank you

  Rakesh Kumar

  (a). theoretically, jumping Phase 1 and done everything in Phase 2 (for aggressive mode only) would probably be a good idea to make it safer.  However, this would require a complete redesign of the IKE protocol.  As you probably already know, aggressive mode is used by default only for VPN remote access, and I've never seen used for a site to any of the customers that I came in contact.  In aggressive mode, in my opinion, would be used only in situations where a large number of VPN tunnels are built and demolished all the time (as with RA VPN) to save on material resources.  But... It is what it is, not a very safe to use method.

  (b) the pre-shared key is used to create a hash and this hash is sent to the remote peer.  If the remote peer can create the same hash using its own pre-shared key, then peers know they share the same secrets.  The problem with aggressive mode is that the hash is sent in plain text format, so if an attacker is able to capture these data they could preform a brute force offline attack.

  (c). I think that this has to do with the fact that the aggressive mode sends its identity in text clear and not must therefore not be pre-configured as a peer answer as it does with tunnels with addresses static at both ends.

  --

  Please do not forget to select a correct answer and rate useful posts

• Cisco router check ipsec site to site vpn tunnetl time?

  I have a Cisco router that has a tunnel vpn to another depending on the location. Now, I want to check how long the VPN for up/construction. I know not if on the SAA, he has this 'sh l2l vpn-sessiondb' command that will allow me to view the tunnel for how long time. Don't seem to find the correct command for Cisco router. If you know the order let me know! Thank you.

  Hello

  I suppose there might be some differences between different platforms (except ASA) VPN or at least it seems to me

  You can try the following command

  View details remote crypto session

  Partial output from one of our routers

  Interface: Port-channel20

  Profile:

  Duration: 01:21:02

  The session state: UP-ACTIVE

  Hope this helps

  -Jouni

• IPSEC and routing protocols

  Hello world

  I read that IPSEC does not support routing with VPN's Site to the other protocols because both are Layer4.

  This means that if Site A must reach the B Site over a WAN link, we use static IP on the Site A and Site B router?

  In my lab at home I config Site to Site VPN systems and they work correctly using OSPF does that mean that IPSEC supports the routing protocol?

  IF someone can explain this please?

  Thank you

  Mahesh

  There is no problem with the routing on IPsec protocol, there are limits to some implmentations.

  Our old (strives, but still popular) crypto maps where such implemtation.

  What you need to remember, is that to make routing protocols (more) on IPsec, you must ensure that multicast is allowed through, i.e. your traffic selectors should be postponed. Another thing is that some of these protocols do a check if Hellos were recived leave a subnet connected etc etc. Of course, this isn't a problem with BGP (or most of the problems can be overcome easily).

  New implementations - side Cisco using protections of tunnel - we can run protcols routing on IPsec with very few restrictions.

  M.

• Work in underground

  Hello

  I have two sites and two of them have internet access. Now I have to

  do tunel between them so that guests with private IP addresses

  communicate directly without NAT.

  (1) who is the best solution to use (GRE, L2TP, or something else)?

  (2) is it possible that I have the same network addresses on both sides

  (IE 10.10.0.0/16)?

  (3) if I use GRE do I need a single public IP address from my ISP on

  interface to the Internet (through tunnel)?

  (4) is it possible to use the same connection and IP to my ISP address

  and tunnel only private addresses (i.e. 10.10.0.0) to my

  remote site? of course all the other IP addresses should be routed to

  Internet.

  Thank you

  Antonio

  There are several approaches that you can consider. Probably the simplest is to make GRE tunnels between sites. The ACCORD will allow you to send traffic between sites without the need to translate the addresses. The ACCORD would allow you to run a protocol for routing between sites. A routing protocol would allow you to have addresses in the same range of addresses on the two sites, as long as they do not overlap. By layering, I mean for example to have 10.10.5.0/25 at site 1 and also have the same subnet to site 2. In this case the only solution is to translate the addresses.

  The ACCORD would allow sites to communicate but doesn't provide a degree of protection for traffic. Depending on whether you need to protect traffic between sites, you might want to consider IPSec that can provide protection. Until very recently disclosed IPSec would carry only unicast IP traffic which means that you could not run a dynamic routing on IPSec protocol. Very recent permits routing over IPSec protocols. I have not yet had any experience with this new feature, so can't do not advise how it works.

  The traditional solution if you want coverage for traffic and want a routing protocol has been to run IPSec with the GRE tunnels. I did a lot of this, and it works pretty well.

  Whether it's the GRE, IPSec or IPSec with GRE you will need public IP addresses on the edge of the two sites.

  And with any which of these solutions, you can exchange traffic between sites and route other traffic on the Internet.

  HTH

  Rick

• 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.

• A Site with IPsec without restoring a new tunnel

  Hello, I have a question about IPSec S2S.

  Network.PNG

  

  In this topoloy, I would like to that IPSec S2S between 172.21.0.0/24 and 172.22.0.0/24.

  The serial line is the first priority and route on ISP is the second priority for routing.

  The question is how can I create the IPsec Site to Site connection without restore when the routing path changes?

  The AR configuration:

  !
  version 15.1
  no service the timestamps don't log datetime msec
  no service timestamps debug datetime msec
  no password encryption service
  !
  hostname AR
  !
  !
  !
  !
  !
  !
  !
  !
  no ip cef
  No ipv6 cef
  !
  !
  !
  username cisco password 0 BR
  !
  !
  license udi pid CISCO2901/K9 sn FTX1524YO05
  licence start-up module c2900 technology-package securityk9
  !
  !
  !
  crypto ISAKMP policy 10
  BA 3des
  md5 hash
  preshared authentication
  Group 2
  !
  cisco key crypto isakmp 10.0.0.2 address
  address of cisco crypto isakmp 200.200.200.2 keys
  !
  !
  !
  Crypto ipsec transform-set esp-3des esp-sha-hmac TS
  !
  CMAP 10 ipsec-isakmp crypto card
  defined peer 10.0.0.2
  defined by peer 200.200.200.2
  game of transformation-TS
  match the vpn address
  !
  !
  !
  !
  !
  !
  pvst spanning-tree mode
  !
  !
  !
  !
  !
  !
  interface GigabitEthernet0/0
  IP 100.100.100.2 255.255.255.252
  automatic duplex
  automatic speed
  card crypto WCPA
  !
  interface GigabitEthernet0/1
  IP 172.21.0.254 255.255.255.0
  automatic duplex
  automatic speed
  !
  interface Serial0/0/0
  the IP 10.0.0.1 255.255.255.252
  encapsulation ppp
  Chap PPP authentication protocol
  2000000 clock frequency
  card crypto WCPA
  !
  interface Serial0/0/1
  no ip address
  2000000 clock frequency
  Shutdown
  !
  interface Vlan1
  no ip address
  Shutdown
  !
  router ospf 1
  Log-adjacency-changes
  Network 10.0.0.0 0.0.0.3 area 0
  network 172.21.0.0 0.0.0.255 area 0
  !
  router RIP
  version 2
  network 100.0.0.0
  network 172.21.0.0
  No Auto-resume
  !
  IP classless
  !
  IP flow-export version 9
  !
  !
  list of IP - vpn access scope
  IP 172.21.0.0 allow 0.0.0.255 172.22.0.0 0.0.0.255
  !
  !
  !
  !
  !
  Line con 0
  !
  line to 0
  !
  line vty 0 4
  opening of session
  !
  !
  !
  end

  Configuration of BR:

  !
  version 15.1
  no service the timestamps don't log datetime msec
  no service timestamps debug datetime msec
  no password encryption service
  !
  hostname BR
  !
  !
  !
  !
  !
  !
  !
  !
  no ip cef
  No ipv6 cef
  !
  !
  !
  Cisco spends 0 username AR
  !
  !
  license udi pid CISCO2901/K9 sn FTX1524L63A
  licence start-up module c2900 technology-package securityk9
  !
  !
  !
  crypto ISAKMP policy 10
  BA 3des
  md5 hash
  preshared authentication
  Group 2
  !
  cisco key crypto isakmp 10.0.0.1 address
  address of cisco crypto isakmp 100.100.100.2 keys
  !
  !
  !
  Crypto ipsec transform-set esp-3des esp-sha-hmac TS
  !
  CMAP 10 ipsec-isakmp crypto card
  defined peer 10.0.0.1
  defined by peer 100.100.100.2
  game of transformation-TS
  match the vpn address
  !
  !
  !
  !
  !
  !
  pvst spanning-tree mode
  !
  !
  !
  !
  !
  !
  interface GigabitEthernet0/0
  IP 200.200.200.2 255.255.255.252
  automatic duplex
  automatic speed
  card crypto WCPA
  !
  interface GigabitEthernet0/1
  IP 172.22.0.254 255.255.255.0
  automatic duplex
  automatic speed
  !
  interface Serial0/0/0
  the IP 10.0.0.2 255.255.255.252
  encapsulation ppp
  Chap PPP authentication protocol
  card crypto WCPA
  !
  interface Serial0/0/1
  no ip address
  2000000 clock frequency
  Shutdown
  !
  interface Vlan1
  no ip address
  Shutdown
  !
  router ospf 1
  Log-adjacency-changes
  Network 10.0.0.0 0.0.0.3 area 0
  network 172.22.0.0 0.0.0.255 area 0
  !
  router RIP
  version 2
  network 172.22.0.0
  network 200.200.200.0
  No Auto-resume
  !
  IP classless
  !
  IP flow-export version 9
  !
  !
  list of IP - vpn access scope
  IP 172.22.0.0 allow 0.0.0.255 172.21.0.0 0.0.0.255
  !
  !
  !
  !
  !
  Line con 0
  !
  line to 0
  !
  line vty 0 4
  opening of session
  !
  !
  !
  end

  Thank you very much!

  Although you might go this route, I wouldn't.

  I would use VTI (GRE tunnels that run over IPSec) interfaces.  One on the series circuit and the other on the circuit of the ISP.

  You can then either use GRE KeepAlive to detect which tunnels are in place and use static routes or dynamic routing as EIGRP Protocol (put a higher value of the 'bandwidth' with the 'bandwidth' command on the favorite tunnel).

• Simple IOS VPN IPsec HUB and Spoke failover HUB

  Hi all

  I have a nd architecture VPN Hub spoke with Asit, IKEv1 and IPsec.

  My hub is connected to a single service provider.

  I wish I had a hardware redundancy for my hub.

  Instead of creating a double tunnel in each Department, I would like to use my router 4000ISR failover protocol.

  Is it possible to simply achieve?

  If I use IOS IPsec failover that I need to deploy my changes on the two router or (such as ASA) I can set the active router and allow the watch to receive the chenges?

  Thanks to you all.

  Johnny

  If your ISP connection is one that has a routed block and you can connect two routers same in it, you can then configure HSRP.

  The source of the Tunnel becomes the HSRP address.  Rays may not know that there are two routers.

  Easy failover.

  Alternatively, you can have a single tunnel with hubs double (if you do not use HSRP).  You don't have to borrow the double tunnels.