MikroTik IPSEC behind FritzBox Router

Configure the Fritzbox to passthrough IPSEC ESP and UDP ports 500(ISAKMP) and 4500(NAT-T) 1. Configure the FritzBox that it allows incoming and outgoing connections for the following ports and IP protocols to your MikroTik Box/CHR : ESP (“Encapsulated Security Payload”; IP protocol number 50 (no ports here!)) in most routers this is = “IPsec Passthrough”…

Mikrotik, SSH Key with PuTTY – Unable to use key file “id_rsa” (OpenSSH SSH-2 private key (old PEM format))

Unable to use key file “id_rsa” (OpenSSH SSH-2 private key (old PEM format)) Background information , taken from the PuTTYgen Help section :: 8.2.12 Dealing with private keys in other formats Most SSH-1 clients use a standard format for storing private keys on disk. PuTTY uses this format as well; so if you have generated…