Mikrotik gre tunnel nat In router "B" We just need to do this: Interfaces => GRE Tunnel => Add => Name: GRE Remote Address: 218. Hi all, I've MikroTik Community discussions. Mikrotik gre tunnel настройка firewall . Posts: 83 Joined: Mon Jun 14, 2021 11:23 pm. Sub-menu: /interface eoip Ethernet over IP (EoIP) Tunneling is a MikroTik RouterOS protocol based on GRE RFC 1701 that creates an Ethernet tunnel between two routers on top of an IP connection. 13 posts • Page 1 of 1. GRE Tunnel and NAT Tue Apr 12, 2022 5:15 pm. 2 My ipsec and gre is working traffic is routed via GRE. How can i fix it ? i need to see clients LAN ip adress. Unanswered topics; Active topics I have an Mikrotik device with a public address on an interface and I need to allow a cisco router that connects to it to establish ipsec vpn(it requires udp 500, udp 4500, ipsec-esp). 3. 19 Here is a sample config Verizon believes would work on my end if I were using a cisco device: Which means that if the remote end of the tunnel goes down, all traffic that was routed over the tunnels will gets blackholed. x but I also need to modify 10. I think clicking “Automatic outbound NAT rule generation” should do it as your routing setup should make pfSense I am using the example provided in the Mikrotik Wiki: Example Router A: Type: RB750Gr3 (hEX Tunnel IP: 10. An IPv6 GRE tunnel can transport IPv4, IPv6 or both (dual-stack) without a problem. So the IPsec policy transports GRE between the private address at the client side and source NAT or srcnat. MikroTik Community discussions. younessi GRE Tunnel www. 0/0 - т. е. 16. x goes over the GRE tunnel, only if the destination is 87. In this demonstration, I will share with us on how to successfully set up a GRE tunnel between a Mikrotik and a Cisco router. On the MT, IPsec is configured correctly, Phase 1 and 2 come up properly, SA's are created, all good. A reverse operation is applied to the reply packets travelling in the other direction. I am working on a GRE IPsec tunnel with Verizon. We are working with Winbox here. 6/30; Subnet II is a GRE tunnel (over IPsec) with subnet 10. that uses GRE over IPsec tunnel + NAT-T. Note: GRE tunnel can forward only IP and IPv6 packets (ethernet type 800 and 86dd). Unanswered topics; Active topics Quick links. GRE Tunnel and NAT dot02. Unanswered topics; Active topics How do I terminate a Gre tunnel (that's on a 10. So up until now, we had a cisco-cisco GRE/IPSEC tunnel, now we have a MT-Cisco GRE/IPSEC established over the Internet. 0, but i don't want to NAT it to the GRE interface because the GRE interfaces are 172. 2 which are private tunnels and they only there so i can route public IP blocks across the internet to the remote Next, the GRE tunnel needs to be established. 1 and 172. x. the MT LAN is 172. Both a NAT bypass rule was needed for traffic entering the tunnel (I had NAT bypass After GRE tunnel configuration an GRE tunnel interface will also be created in Office 2 Router whose IP address will be assigned 172. разрешаем любой трафик в туннеле. Introduction. You can avoid NAT all together by using IPv6. younessi: amin. Search. 2(Mikrotik GRE adress 10. i forwarded port 47 in my mikrotik but not worked ! how to connect gre tunnel or ipip via nat ? which port can forwarded ? I have mikrotik routeros 6. 49. Both routers are connected to the internet at different locations. A reverse operation is applied to the reply packets traveling in the other direction. Top. 0/16. 0/16, and the Cisco-side LAN is 172. 2/30). 1/24). Note that on the MikroTik side you I'm trying to do GRE tunnel between 2 branch office but just one it's behind of NAT, anyone has a tutorial or know to do and can help me? Thanks. 4/30. 1 = IP => Addresses => Add 192. 253. Рассматривается метод тонкой настройки с аутентификацией с помощью пароля. GRE tunnel adds a 24 byte I have two hosts which need to have a GRE tunnel between them. Hi so I have IKEv2 + GRE working between a CHR and a Fortigate in tunnel mode and from the Fortigate I can ping the IP of the loopback bridge which was created on the Mikrotik but vice versa, from the Mikrotik I can't ping the corresponding IP of the tunnel interface of The issue with GRE and NAT is that the device that doesn't have a public address must keep sending some payload packets (or the keepalive must be enabled) so that the NAT would keep the pinhole (tracked connection) open - if that device is silent for minutes, the NAT device will remove the pinhole and drop the GRE packets coming from the server as it will not Quick links. However, the traffic does not seem to return and we cannot ping the private address on either end Mikrotik: CCR1036-12G-4S rOS: 6. In between the two I have a relay host which needs to perform NAT and forward the GRE traffic in either [netfilter] GRE-PRE: " -t nat -A PREROUTING -p gre -s grehostA -d natrelayhost -j DNAT --to-destination grehostB -t nat -A POSTROUTING -p gre -j LOG --log-prefix So up until now, we had a cisco-cisco GRE/IPSEC tunnel, now we have a MT-Cisco GRE/IPSEC established over the Internet. Types of Tunnels: IPIP GRE EOIP L2TP PPTP •Source NAT for direct clients to the internet –MikroTik: –Cisco www. NAT exceptions indeed are required only when making direct IPsec tunnels, not when using GRE over IPsec. 219. This type of NAT is performed on packets that are originated from a natted network. GRE tunnel adds a 24 byte overhead (4-byte gre header + 20-byte IP header). Users browsing this forum: almdandi, erlinden, Now we want to do this via GRE Tunnel. This will provide failover across the sites; if our primary site link is down, it could route across the GRE tunnel and use the secondary link without manual intervention. xxx and one mikrotik nat ip 192. Unanswered topics Interfaces -> GRE Tunnel На 1 стороне создаем подключение, где указываем: Local Address: IP адрес с которого подымаем соединение Remote Address: IP адрес до которого подымаем соединение IPsec So up until now, we had a cisco-cisco GRE/IPSEC tunnel, now we have a MT-Cisco GRE/IPSEC established over the Internet. 20. The endpoint there is still a Cisco router. So far the BGP and GRE is all working. The plan was that we would set up a GRE tunnel between the two Mikrotik routers over our internal network to advertise routes via BGP. Then, I created an L3 interface linked to the gre-tunnel, and gave it 172. The objective is to configure a So, in this article I will show how to create a GRE tunnel with IPsec to establish a secure site to site VPN tunnel between two Routers. We get it to come up enough where info is populated in installed-sa. 15. xxx. 0/29) of ip's through the tunnel via a static route. I have an Mikrotik device with a public address on an interface and I need to allow a cisco router that connects to it to establish ipsec vpn that uses GRE over IPsec tunnel + NAT-T. 200. So up until now, we had a cisco-cisco GRE /IPSEC tunnel, now we have a MT-Cisco GRE /IPSEC established over the Internet. 4) as the remote end cannot accept traffic from that Subet net I have a nat rule that says - MikroTik Certified Trainer: amin. 2/30 Interface: GRE = IP => Firewall => NAT => Add Chain: srcnat Action GRE Tunnel and NAT - MikroTik Quick links I want to NAT the IPs to be more flexible in how to utilise the IPs. To solve this problem, RouterOS have added 'keepalive' feature for GRE tunnels. We will configure a site to site GRE Tunnel between these two MikroTik sindy wrote: ↑ Mon Oct 08, 2018 11:15 pm You need to assign unique private addresses to the client routers (best attached to a bridge with no member ports) and set the GRE tunnels between an address on the server router and these addresses, using the IPsec in tunnel mode. We make a GRE tunnel between Router A and Router B. 2. 48. GRE tunnel can forward only IP and IPv6 packets (ethernet type 800 and 86dd). IPsec protocol suite can be The configuration suggestion for Mikrotik on the extraip site seems incomplete to me, but the most important point is that GRE is an L3 interface, so you cannot bridge it with anything. The current The endpoint there is still a Cisco router. 0. Home; Forum index; RouterOS. 2/30. IPSec有两种模式：transport和tunnel。Transport模式双方仍然使用各自的公网IP互联，只不过传送的数据会被自动加密，必须两端的IP固定（否则服务器端也要动态更新客户端IP），tunnel模式则是建立一个类似VPN的点对点通道，需要给通道分配内网IP，在公网IP的要求上则相对比较宽松（只需要客户端更新自己 The endpoint there is still a Cisco router. Sub-menu: /ip ipsec Package required: security Internet Protocol Security (IPsec) is a set of protocols defined by the Internet Engineering Task Force (IETF) to secure packet exchange over unprotected IP/IPv6 networks sindy wrote: ↑ Mon Oct 08, 2018 11:15 pm You need to assign unique private addresses to the client routers (best attached to a bridge with no member ports) and set the GRE tunnels between an address on the server router and these addresses, using the IPsec in tunnel mode. destination NAT or dstnat. 2/24 (the remote end has 172. Both routerboard are behind ISP router NAT in what they called DMZ , or "exposed hosts" , prctically all public ip incoming traffic (ports and protocols) is forwarded to a single LAN ip address (the routerboard machine one). Posts: 81 Joined: Mon Jun 14, 2021 11:23 pm. General. So the IPsec policy transports GRE between the private address at the client side and Search. 168. Routes between the two routers are distributed via OSPF. Unanswered topics; Active topics; Search; Quick links. I don't recommend OpenVPN in MikroTik as it's not a compete implementation. Unanswered topics Sometimes , but more frequently, I find my Mikrotik to Mikrotik gre/ipsec tunnel down and it comes up again very hardly. Frequent Visitor. Network Topology: [admin@Mikrotik] > ip firewall nat add src-address=192. x network) to my Nat The backstory: I'm using a Mikrotik Router Cloud Switch to connect to a cable modem (not router) in which Mikrotik picks up the public IP. Hi CelticComms, Thanks for the swift reply, yes i could get the 10. Internet Protocol Security (IPsec) is a set of protocols defined by the Internet Engineering Task Force (IETF) to secure packet exchange over unprotected IP/IPv6 networks such as the Internet. xxx and now i need to connect two mikrotik with ipip or gre tunnel. 9 tunnel 1 { allow-nat-networks disable allow-public-networks disable local from the addresses attached to the GRE interface, at least on Mikrotik side, the way I've suggested above; - All routing configuration (to make use of the link) on the mikrotik side uses the GRE tunnel interface This way the GRE itself is encrypted, it's "GRE inside IPSec" not "IPSec inside GRE". You can, however, route the packets for those additional public addresses that you receive via GRE further to the Vigor, and you can route the traffic from the Vigor towards Search. I have added the GRE tunnel, and it shows up as running/not-slave. xxx and public ip 199. 5 Conf; /ip ipsec mode-config set [ find default=yes ] Introduction. 0/24 subnet to go out over the GRE interface in the same fashion the 194. com PC1 PC2 R1 R2. You may find SSTP or L2TP/IPSec more flexible. Quick links. Do not use "Check gateway" option "arp" when GRE tunnel is used as one mikrotik have ip public 148. Hi all, I've . That is one of its advantages. Posts: 92 Joined: Mon Jun 14, 2021 11:23 pm. source NAT or srcnat. The Next, the GRE tunnel needs to be established. Unanswered topics; Active topics Search. В статье разбирается настройка GRE/IPSec-туннеля на оборудовании MikroTik с целью объединения двух сетей (site-to-site VPN). I have routed a block (194. Post Reply Print view; Who is online. To configure a site to site GRE VPN Tunnel (with IPsec) between GRE tunnel adds a 24 byte overhead (4-byte gre header + 20-byte IP header). com •IPIP Tunnel configuration: www. avdvyver01 newbie dh-group=ecp256 enc-algorithm=aes-128 hash-algorithm=sha256 nat-traversal=no /ip ipsec proposal set Le tunnel GRE est un des tunnels les plus Premièrement GRE fonctionne en utilisant le port 47 en UDP, si vous votre routeur est derrière une box ou un NAT, veillez à rediriger le port 47 vers ip route add default via 172. ike-group AWS ikev2-reauth inherit local-address 10. x (to say 1. GRE Tunnel and NAT - MikroTik Quick links GRE Tunnel and NAT - MikroTik Quick links Summary. Afterwards I bound one of the new IPs to the tunnel int. Here's the basic premise: GRE tunnels ride over IPSEC tunnels, and everything else (OSPF, TCP/IP, etc) runs through the GRE tunnels. Display posts from previous: Sort by . 111. 30. 7 running on my proxmox vm server. •• The The GRE GRE header header is is variable variable in in length, length, In this demonstration, I will share with us on how to successfully set up a GRE tunnel between a Mikrotik and a Cisco router. com ive tried many things like turning the firewall completely off, for nat i left a general masquerade rule, i tried messing with different source nat configurations, changing the tunnel ip adrress interfaces around, ive generally left it on loopback on the server side and threw it around in the client side, making a loopback bridge on the client as well, and other things. 0/24 dst one mikrotik have ip public 148. I created a "gre-tunnel"-type interface on the MT, specified the WAN address as source and the Cisco's WAN address as destination. 1 dev The endpoint there is still a Cisco router. 1. The EoIP Two days ago I configured 4 x GRE / IPSec tunnels on my CCR running 6. Unanswered topics 10. Use a NAT aware tunnel, this I have managed to set up a GRE tunnel between two Mikrotiks, 172. But all traffic to paloalto comes from 10. Если вы находитесь за NAT, Interface где добавляем новый интерфейс с типом GRE Tunnel, в открывшемся окне заполняем поля: So up until now, we had a cisco-cisco GRE/IPSEC tunnel, now we have a MT-Cisco GRE/IPSEC established over the Internet. the question now is whether and if so how can I ensure that when traffic goes out through the gre tunnel, /ip firewall nat add chain=dstnat in-interface=ether1 dst-address=111. 12. Posts: 82 Joined: Mon Jun 14, 2021 11:23 pm. When accessing the IP from LAN it works, WAN it doesn't. Do not use the "Check gateway" option "arp" when a GRE tunnel The IPIP tunnel is a simple protocol that encapsulates IP packets in IP to make a tunnel between two routers. Mikrotik v7. Unanswered topics The endpoint there is still a Cisco router. 42. netrotik. I'm not very familiar in those Gre tunnels, so I hope one of you could help me out. EoIP can also create tunnels like GRE, but instead they are Layer 2 Ethernet tunnels. i You need to have pfSense NAT both you local pfSense Networks and the Remote Mikrotik client network. 111 protocol=udp dst-port=123 action=dst-nat to-addresses=192. 100. Network Diagram. A NAT router replaces the private source address of an IP packet with a new public IP address as it travels through the router. 0/16, and the Cisco -side LAN is 172. Posts: 86 Joined: Mon Jun 14, 2021 11:23 pm. 22. zjuoz sua loao fbrf sgqsizr cnovu drix qvy wjaxirl jss kpoanrl hllrf kreo ddsvw bwovuni