FortiGate
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Platform Notes
FortiGate is a Firewall/VPN appliance, manufactured by Fortinet, that runs on proprietary hardware. The operating system is FortiOS.
It supports both site-to-site and remote access VPN.
Version History
Backoff Patterns
Vendor IDs
Authentication Methods
Fortigate supports Pre-Shared Key (PSK) and RSA Signature authentication methods.
ISAKMP SA Lifetime
Lifetime in Seconds
Fortigate supports no lifetime, or any lifetime represented as a 4-byte variable length attribute from 1 to 0xffffffff inclusive. It also accepts a 2-byte variable length attribute for the lifetime.
It always responds with the same lifetime value that was sent, and always replies with a variable-length attribute, even when the lifetime could be represented in a fixed-length attribute.
$ ike-scan --lifetime=none --trans=5,2,1,2 -M 10.115.68.203
Starting ike-scan 1.9.2 with 1 hosts (http://www.nta-monitor.com/tools/ike-scan/)
10.115.68.203 Main Mode Handshake returned
HDR=(CKY-R=4a042096419a6a6a)
SA=(Enc=3DES Hash=SHA1 Auth=PSK Group=2:modp1024)
VID=afcad71368a1f1c96b8696fc77570100 (Dead Peer Detection v1.0)
$ ike-scan --lifetime=1 --trans=5,2,1,2 -M 10.115.68.203
Starting ike-scan 1.9.2 with 1 hosts (http://www.nta-monitor.com/tools/ike-scan/)
10.115.68.203 Main Mode Handshake returned
HDR=(CKY-R=bced7c438593d6e2)
SA=(Enc=3DES Hash=SHA1 Auth=PSK Group=2:modp1024 LifeType=Seconds LifeDuration(4)=0x00000001)
VID=afcad71368a1f1c96b8696fc77570100 (Dead Peer Detection v1.0)
$ ike-scan --lifetime=0xffff --trans=5,2,1,2 -M 10.115.68.203
Starting ike-scan 1.9.2 with 1 hosts (http://www.nta-monitor.com/tools/ike-scan/)
10.115.68.203 Main Mode Handshake returned
HDR=(CKY-R=d30dd144316d4fb7)
SA=(Enc=3DES Hash=SHA1 Auth=PSK Group=2:modp1024 LifeType=Seconds LifeDuration(2)=0xffff)
VID=afcad71368a1f1c96b8696fc77570100 (Dead Peer Detection v1.0)
$ ike-scan --lifetime=0xffffffff --trans=5,2,1,2 -M 10.115.68.203
Starting ike-scan 1.9.2 with 1 hosts (http://www.nta-monitor.com/tools/ike-scan/)
10.115.68.203 Main Mode Handshake returned
HDR=(CKY-R=9cb6b714252c1a3e)
SA=(Enc=3DES Hash=SHA1 Auth=PSK Group=2:modp1024 LifeType=Seconds LifeDuration(4)=0xffffffff)
VID=afcad71368a1f1c96b8696fc77570100 (Dead Peer Detection v1.0)
It does not accept a 1-byte variable length attribute or anything above 4-bytes.
$ ike-scan --lifetime=0xff --trans=5,2,1,2 -M 10.115.68.203 Starting ike-scan 1.9.2 with 1 hosts (http://www.nta-monitor.com/tools/ike-scan/)
$ ike-scan --lifetime=0xffffffffffffffff --trans=5,2,1,2 -M 10.115.68.203 Starting ike-scan 1.9.2 with 1 hosts (http://www.nta-monitor.com/tools/ike-scan/)
It also accepts a lifetime value as a basic attribute, and in this case will use a basic attribute in its reply.
$ ike-scan --trans="(1=5,2=2,3=1,4=2,11=1,12=28800)" -M 10.115.68.203
Starting ike-scan 1.9.2 with 1 hosts (http://www.nta-monitor.com/tools/ike-scan/)
10.115.68.203 Main Mode Handshake returned
HDR=(CKY-R=cbacb2f23b0a5476)
SA=(Enc=3DES Hash=SHA1 Auth=PSK Group=2:modp1024 LifeType=Seconds LifeDuration=28800)
VID=afcad71368a1f1c96b8696fc77570100 (Dead Peer Detection v1.0)
Lifetime in Kilobytes
$ ike-scan --lifetime=none --lifesize=1 --trans=5,2,1,2 -M 10.115.68.203
Starting ike-scan 1.9.2 with 1 hosts (http://www.nta-monitor.com/tools/ike-scan/)
10.115.68.203 Main Mode Handshake returned
HDR=(CKY-R=9ed2e4db1135635e)
SA=(Enc=3DES Hash=SHA1 Auth=PSK Group=2:modp1024 LifeType=Kilobytes LifeDuration(4)=0x00000001)
VID=afcad71368a1f1c96b8696fc77570100 (Dead Peer Detection v1.0)
$ ike-scan --lifetime=none --lifesize=0xffffffff --trans=5,2,1,2 -M 10.115.68.203
Starting ike-scan 1.9.2 with 1 hosts (http://www.nta-monitor.com/tools/ike-scan/)
10.115.68.203 Main Mode Handshake returned
HDR=(CKY-R=c085e4212a28afa3)
SA=(Enc=3DES Hash=SHA1 Auth=PSK Group=2:modp1024 LifeType=Kilobytes LifeDuration(4)=0xffffffff)
VID=afcad71368a1f1c96b8696fc77570100 (Dead Peer Detection v1.0)
$ ike-scan --lifetime=none --lifesize=0xffffffffffffffff --trans=5,2,1,2 -M 10.115.68.203 Starting ike-scan 1.9.2 with 1 hosts (http://www.nta-monitor.com/tools/ike-scan/)
