What youll learn vpn technology ipsec, gre and eoip real configurations requirements basic networking knowledge description in this course students will learn how to configure different types of tunnels over internet on a pair of mikrotik routers and how to build multisite vpn with mikrotik software router in the center. This provides benefits of an actual l2tp interface and, therefore, ospf. When configuring an ikev2 ipsec tunnel, why can the mikrotik do sha256 and sha512, but not sha384. Diagrams, commands, mtu, transport modes, isakmp, ipsec and more are analysed in great depth. How to configure gre over an ipsec tunnel on routers. Configuring pointtopoint gre vpn tunnels unprotected gre. Mikrotik site to site gre tunnel configuration with ipsec. Sep 06, 2019 in this course students will learn how to configure different types of tunnels over internet on a pair of mikrotik routers and how to build multisite vpn with mikrotik software router in the center. Hubandspoke topologies are the most common topologies in a p2p gre over ipsec design. For the action tab, i define the sa source and destination addresses, and also that it should be a ipsec tunnel. After mikrotik router basic configuration, we will now configure gre tunnel with ipsec in both mikrotik routeros. Site to site gre tunnel over ipsec ikev2 using dns.
Creating a sitetosite vpn with windows azure and mikrotik. Ipip tunnel with ipsec transport on routeros phy2vir. Ike called internet association and key management protocol. I still have the rb493g in a colocation and i usually connect my home and the colo via openvpn or ipsec. For today, i will replace the linux device with a cisco. This video provide how to configure gre over ipsce vpn tunnel, ipsec vpn cannot forward any multicast and broadcast traffic as a result any dynamic routing protocol such as ospf,rip or eigrp. If you are using gre over ipsec with a multicast server on one site and multicast clients on the other site, then you will need to add on both the tunnel interfaces and the ethernet interfaces facing the lan for both site routers the following commands. The transfers are being done over an ipsec tunnel between a cisco asa5520 and a mikrotik rb2011uiasrm. Jan 05, 2015 this video provide how to configure gre over ipsce vpn tunnel, ipsec vpn cannot forward any multicast and broadcast traffic as a result any dynamic routing protocol such as ospf,rip or eigrp. For gre keepalives, the sender prebuilds the keepalive response packet inside the original keepalive request packet so that the remote end only needs to do standard gre decapsulation of the outer gre ip. Gre tunnel with ipsec ensures ip packet encapsulation as well as authentication and encryption.
I have several gres set up between mikrotik routers, so i feel comfortable with the basics. Heres the situation were working with for this article. Transport transport mode is only for securing traffic. Create an ipsec tunnel between 2 mikrotik routers and dynamic. Gre over ipsec tunnel mode provides additional security because no part of the gre tunnel is exposed, however, there is a significant overhead added to the packet. Mar 18, 2018 mikrotik ipip tunnel with ipsec site to site vpn march 18, 2018 abu sayeed mikrotik router, vpn configuration vpn v irtual p rivate n etwork is a technology that provides a secure tunnel across a public network. Help create ipsec fortinet mikrotik with adsl moden. On the general tab i define the source and destination ipsubnets like this. The routing control plane uses a dynamic igp routing protocol such as eigrp or ospf over the vpn tunnels between headend and branch routers. Having the crypto map on the physical and tunnel interface when using.
We will then secure the l2tp tunnel with ipsec in transport mode. Apr 03, 2018 gre encapsulates ip packets in ip to make a tunnel between two mkrotik routers. We started out being a sonicwall vendor years ago until we came across a new client site with a mikrotik firewall in place and we couldnt replicate the configuration onto a sonicwall or any other firewall brand on the market at that time, so we left the mikrotik in place and have since installed hundreds with our own custom scripts, scheduled tasks, and other customizations. This works fine, also in that l2tp tunnel i created an ipsec transport mode tunnel. Jun 21, 2011 since gre is a packet tunneling mechanism for tunneling ip inside ip, a gre ip tunnel packet can be built inside another gre ip tunnel packet. Adventures with gre and ipsec on mikrotik routers major. I have not yet used this but the documentation is quite encouraging about its ability to transport multicast traffic. On the pfsense side the gre interface shows as up, on the mikrotik side it is blinking running not running running, etc. Because this ipsec tunnel will be a sitetosite tunnel connecting two networks instead of hosts well specify tunnelyes in the configuration. Networking is not one of my best skills and im always looking to learn more about it when i can. These are what tells the router was traffic is interesting and should be sent over the tunnel instead of routed normally.
Plain gre tunnels arent encrypted, but i prefer to set them up first to test connectivity prior to adding ipsec into the mix. Ipsec is for unicast traffic and traditional implementation of ipsec will not transport multicast. Here is the example using a debian linux, frr free range routing and strongswan connecting over a gre over ipsec tunnel to a cisco iosxe csrv router. Ipsecgre with nat on ios router configuration example. Which means that if the remote end of the tunnel goes down, all traffic that was routed over the tunnels will gets blackholed. Strange thing indeed is that ipsec tunnels seems much faster than ipsec over ipip or gre tunnels. How to configure mikrotik site to site gre tunnel with ipsec. We have one ipsec tunnel from a sonicwall nsa3500 series to our ccr1036, this one tops at 1718mbs around 180mbps which is fair because our ccr is connected at 500mbps and the sonicwall at 200mbps. With gre ipsec tunnel mode, the whole gre packet which includes the original ip header packet, is encapsulated, encrypted and protected inside an ipsec packet. Mikrotik ipip tunnel with ipsec site to site vpn system zone. Ipsec can be a challenge to configure the first time around. Vpn with ipsec, gre and eoip real labs heroturko download. This means that when you configure a tunnel and use the property ipsecsecret, ipsec transport settings will be automatically configured. Building scalable ipsec infrastructure with mikrotik.
The first try was to download file over gre without encyption. If the data sent through vpn is not sensitive data, maybe use pptp vpn, much lighter and. To configure generic routing encapsulation gre over an ipsec tunnel between two routers, perform these steps. In other hand if both end router is mikrotik, as long as the phase 1 and phase 2 matches, the ipsec tunnel will be established. Nov 29, 2016 site to site mikrotik ipsec tunnel 29. Guidelines for tunnel configuration are for high security aes256,sha384,dh20. The mikrotik routers are connected via a ipsec gre tunnel.
By default, mikrotik does not allow to use fqdn domain names to setup an ipsec tunnel, so we are going to create some scripts to update the ipsec configuration whenever the local or remote ips change. For testing i was at site 1 and downloaded s a file from site 2. Gre tunneling protocol which can encapsulate a wide variety of protocols creating a virtual pointtopoint link was originally developed by cisco. Passing nonip traffic over ipsec vpn using gre over ipsec. Ipsec failed to preprocess ph2 packet fri sep 27, 2019 7. In my previous post about the ansible playbook for vyos and bgp routing, i wrote that i was looking for some open source alternatives for software routers to use in aws transit vpcs. There is a new feature of ipsec virtual tunnel interface. Edit phase 1 s this this to the oh key nat system frewal 9rvtes statis vpn. In this post we are going to create an ipsec vpn tunnel between two remote sites using mikrotik routers with dynamic public ips. Mar 26, 2018 mikrotik site to site gre tunnel configuration with ipsec march 26, 2018 abu sayeed mikrotik router, vpn configuration vpn v irtual p rivate n etwork is a technology that provides a secure tunnel across a public network. Normal ip security ipsec configurations cannot transfer routing protocols, such as enhanced interior gateway routing protocol eigrp and. I ke that used for two host agree to hoe build an ipsec security. Everything seems to work yet when i sniff the wan interface i can clearly see the gre packets which theoretically i shouldnt be able to see.
Ipsec site to site vpn between mikrotik and cisco router. I did test the entire construct in gns3 integrated with mikrotik. Regarding your second question, in mikrotik sitetosite ipsec, theres no initiator or receiver, so if the other ends router is a non mikrotik one, set that router as the initiator. As i understand it, the mikrotik router uses the policies to route traffic through the tunnel.
Mikrotik ipsec tunnelvpn when both sides have dynamic ipsdhcp at first glance, one would think this is impossible. You will understand how to issue certificates, set up ike2 ipsec, setup firewall and nat, adjust. Create a tunnel interface the ip address of tunnel interface on both routers must be in the same subnet, and configure a tunnel source and tunnel destination under tunnel interface configuration, as shown. Included in the download are text files for each routers configuration with. This example explains how it is possible to establish a secure and encrypted gre tunnel between two routeros devices when one or both sites do not have a static ip address. Configuring a gre tunnel over ipsec with ospf cisco. Jan 08, 2015 not long ago i wrote an article on how to configure an ipsec vpn using mikrotik and linux devices. Ive spent a few days on this and im at a loss on whats missing. Gre encapsulates ip packets in ip to make a tunnel between two mkrotik routers. Although partial mesh topologies are available, they are limited by both the routing protocol and the possibility of a. Im trying to establish a gre over ipsec tunnel between two mikrotik devices. Open source routing gre over ipsec with strongswan and cisco. Mikrotik ipip tunnel with ipsec site to site vpn march 18, 2018 abu sayeed mikrotik router, vpn configuration vpn v irtual p rivate n etwork is a technology that provides a secure tunnel across a public network. Pointtopoint gre over ipsec design and implementation in designing a vpn deployment for a customer, it is essential to integrate broader design considerations such as high availability, resiliency, ip multicast, and quality of service qos.
I disabled all the rules for a few minutes to check anyway, and no change. Vpn with ipsec, gre and eoip real labs idownloadcoupon. I recently picked up a rb850gx2 from my favorite mikrotik retailer, r0cn0c. To solve this problem, routeros have added keepalive feature for gre tunnels.
It is not impossible, thanks to some scripting and a couple of free services. Gre routing between networks, gre over ipsec and verification commands are included to ensure the gre ipsec tunnel is operating. Gre ip tunnel between cisco and mikrotik rez nets notes. In gre tunnel configuration, we will specify local and remote ip address as well as shared secret for ipsec. The policy notifies ike daemon about that, and ike daemon initiates connection to.
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