strongSwan is an open-source, cross-platform, full-featured and widely-used IPsec-based VPN (Virtual Private Network) implementation that runs on Linux, FreeBSD, OS X, Windows, Android, and iOS. Cisco IOS and StrongSWAN IPSEC VPN. wiki.strongswan.org is the legacy strongSwan Documentation site based on Redmine. . Is GRE configured on the StrongSwan device?--Please remember to select a correct answer and rate helpful posts 0 . Go to CONFIGURATION > Configuration Tree > Box > Assigned Services > VPN-Service > Site to Site. APIs and needs to track changes in both. apt-get install strongswan Configuration Ubuntu18.04-FRR-1 CiscoIOSv15.6 (2)T-1 First you need to add a config to /etc/ipsec.conf, something that looks like this: conn tunnel leftupdown=/usr/local/sbin/ipsec-notify.sh #run this script on start left=166.0.0.5 leftsubnet=0.0.0.0/0 #all traffic right=166.0.0.1 rightsubnet=0.0.0.0/0 #all traffic Set up GRE tunnel between local "virtual" address and tunnel endpoint (reachable only via IPSec): ip tunnel add gre6in4 mode gre ttl 255 remote 192.168.101.2 local 192.168.101.1 pmtudisc. You can configure an IPsec tunnel when you want to use a protocol other than SSL to secure traffic that traverses a wide area network (WAN), from a BIG-IP ® system to third-party device. you can tailor this to your needs (changing encryption algorithms, IP addresses etc), just remember to make sure they are the same on both sides (except for IP of course). [CHR]---wan(tunnel gre+ipsec)wan---[CCR1009] aes128cbc/sha1, Actual MTU = 1426 (Auto) . the GRE tunnel with the Linux box!!! There are a few ways to check the config on the Edgerouter devices. It is natively supported by the Linux kernel, but configuration of encryption keys is left to the user. Notice that in the topology below, R1 & R2 are not directly connect to each other. you can tailor this to your needs (changing encryption algorithms, IP addresses etc . [strongSwan] ipsec+gre with strongswan-lancom - narkive I'm trying to establish a GRE over IPSec tunnel between two MikroTik devices. Thanks in Advance. [strongSwan] GRE over IPSec dual connections from road warriors strange ...
