OCVPN troubleshooting

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OCVPN troubleshooting

This document includes troubleshooting steps for the following OCVPN network topologies:

  • Full mesh. l Hub-spoke with ADVPN shortcut. l Hub-spoke with inter-overlay source NAT.

For OCVPN configurations in different network topologies, please refer to the other OCVPN topics.

Full mesh network topology troubleshooting

  • Branch_1 # diagnose vpn ocvpn status
Current State : Registered
Topology : Full-Mesh
Role : Spoke
Server Status : Up
Registration time : Thu Feb 28 18:42:25 2019
Update time : Thu Feb 28 15:57:18 2019
Poll time : Fri Mar 1 15:02:28 2019
  • Branch_1 # diagnose vpn ocvpn show-meta

Topology :: auto

License :: full

Members :: 3

Max-free :: 3

  • Branch_1 # diagnose vpn ocvpn show-overlays

QA

PM l Branch_1 # diagnose vpn ocvpn show-members

Member: { “SN”: “FG100D3G15801621”, “IPv4”: “172.16.200.1”, “port”: “500”, “slot”: 1000, “overlay”: [ { “id”: 0, “name”: “QA”, “subnets”: [ “10.1.100.0\/255.255.255.0” ], “ip_ range”: “0.0.0.0-0.0.0.0” }, { “id”: 1, “name”: “PM”, “subnets”: [

“10.2.100.0\/255.255.255.0” ], “ip_range”: “0.0.0.0-0.0.0.0” } ], “Name”: “FortiGate-100D”, “topology_role”: “spoke” }

Member: { “SN”: “FG900D3915800083”, “IPv4”: “172.16.200.4”, “port”: “500”, “slot”: 1001, “overlay”: [ { “id”: 0, “name”: “QA”, “subnets”: [ “172.16.101.0\/255.255.255.0” ], “ip_ range”: “0.0.0.0-0.0.0.0” }, { “id”: 1, “name”: “PM”, “subnets”: [

“172.16.102.0\/255.255.255.0” ], “ip_range”: “0.0.0.0-0.0.0.0” } ], “Name”: “Branch3”, “topology_role”: “spoke” }

Member: { “SN”: “FGT51E3U16001314”, “IPv4”: “172.16.200.199”, “port”: “500”, “slot”: 1002, “overlay”: [ { “id”: 0, “name”: “QA”, “subnets”: [ “192.168.4.0\/255.255.255.0” ], “ip_ range”: “0.0.0.0-0.0.0.0” }, { “id”: 1, “name”: “PM”, “subnets”: [

“192.168.5.0\/255.255.255.0” ], “ip_range”: “0.0.0.0-0.0.0.0” } ], “Name”: “Branch2”, “topology_role”: “spoke” } l Branch_1 # dagnose vpn tunnel list

list all ipsec tunnel in vd 0

——————————————————

name=_OCVPN2-3.1 ver=2 serial=4 172.16.200.1:0->172.16.200.199:0 dst_mtu=1500 bound_if=11 lgwy=static/1 tun=intf/0 mode=auto/1 encap=none/528 options[0210]=create_dev frag-rfc accept_traffic=1

proxyid_num=2 child_num=0 refcnt=13 ilast=7 olast=0 ad=/0 stat: rxp=0 txp=7 rxb=0 txb=588

dpd: mode=on-demand on=1 idle=20000ms retry=3 count=0 seqno=6 natt: mode=none draft=0 interval=0 remote_port=0 proxyid=_OCVPN2-3.1 proto=0 sa=1 ref=2 serial=8 auto-negotiate

src: 0:10.1.100.0-10.1.100.255:0 dst: 0:192.168.4.0-192.168.4.255:0

SA: ref=3 options=18627 type=00 soft=0 mtu=1438 expire=42923/0B replaywin=2048 seqno=8 esn=0 replaywin_lastseq=00000000 itn=0 qat=0

life: type=01 bytes=0/0 timeout=42931/43200

dec: spi=c34bb752 esp=aes key=16 3c5ceeff3cac1eaa2702b5ccb713ab9b ah=sha1 key=20 5903e358b3d8938ee64f0412887a0fe741ccb105

enc: spi=b5bd4fe1 esp=aes key=16 8ae97a8abe24dae725d614d2a6efdcb0 ah=sha1 key=20 9ec200d9c0cef9e1b7cf76e05dbf344c70f53214

dec:pkts/bytes=0/0, enc:pkts/bytes=7/1064

proxyid=_OCVPN2-3.1 proto=0 sa=0 ref=2 serial=1 auto-negotiate

src: 0:10.1.100.0/255.255.255.0:0 dst: 0:0.0.0.0/0.0.0.0:0

——————————————————

name=_OCVPN2-4.1 ver=2 serial=6 172.16.200.1:0->172.16.200.4:0 dst_mtu=1500 bound_if=11 lgwy=static/1 tun=intf/0 mode=auto/1 encap=none/528 options[0210]=create_dev frag-rfc accept_traffic=1

proxyid_num=2 child_num=0 refcnt=11 ilast=19 olast=19 ad=/0 stat: rxp=0 txp=0 rxb=0 txb=0

dpd: mode=on-demand on=1 idle=20000ms retry=3 count=0 seqno=0 natt: mode=none draft=0 interval=0 remote_port=0 proxyid=_OCVPN2-4.1 proto=0 sa=1 ref=2 serial=7 auto-negotiate

src: 0:10.1.100.0-10.1.100.255:0 dst: 0:172.16.101.0-172.16.101.255:0

SA: ref=3 options=18627 type=00 soft=0 mtu=1438 expire=42911/0B replaywin=2048 seqno=1 esn=0 replaywin_lastseq=00000000 itn=0 qat=0

life: type=01 bytes=0/0 timeout=42931/43200

dec: spi=c34bb750 esp=aes key=16 8c9844a8bcd3fda6c7bd8a4f2ec81ef1 ah=sha1 key=20 680c7144346f5b52126cbad9f325821b048c7192

enc: spi=f2d1f2d4 esp=aes key=16 f9625fc8590152829eb39eecab3a3999 ah=sha1 key=20 5df8447416da541fa54dde9fa3e5c35fbfc4723f

dec:pkts/bytes=0/0, enc:pkts/bytes=0/0

proxyid=_OCVPN2-4.1 proto=0 sa=0 ref=2 serial=1 auto-negotiate

src: 0:10.1.100.0/255.255.255.0:0 dst: 0:0.0.0.0/0.0.0.0:0

——————————————————

name=_OCVPN2-3.2 ver=2 serial=3 172.16.200.1:0->172.16.200.199:0 dst_mtu=1500 bound_if=11 lgwy=static/1 tun=intf/0 mode=auto/1 encap=none/528 options[0210]=create_dev frag-rfc accept_traffic=1

proxyid_num=2 child_num=0 refcnt=11 ilast=6 olast=6 ad=/0 stat: rxp=0 txp=0 rxb=0 txb=0

dpd: mode=on-demand on=1 idle=20000ms retry=3 count=0 seqno=0 natt: mode=none draft=0 interval=0 remote_port=0 proxyid=_OCVPN2-3.2 proto=0 sa=1 ref=2 serial=8 auto-negotiate

src: 0:10.2.100.0-10.2.100.255:0 dst: 0:192.168.5.0-192.168.5.255:0

SA: ref=3 options=18627 type=00 soft=0 mtu=1438 expire=42923/0B replaywin=2048 seqno=1 esn=0 replaywin_lastseq=00000000 itn=0 qat=0

life: type=01 bytes=0/0 timeout=42930/43200

dec: spi=c34bb753 esp=aes key=16 58ddfad9a3699f1c49f3a9f369145c28 ah=sha1 key=20 e749c7e6a7aaff119707c792eb73cd975127873b

enc: spi=b5bd4fe2 esp=aes key=16 8f2366e653f5f9ad6587be1ce1905764 ah=sha1 key=20 5347bf24e51219d483c0f7b058eceab202026204

dec:pkts/bytes=0/0, enc:pkts/bytes=0/0

proxyid=_OCVPN2-3.2 proto=0 sa=0 ref=2 serial=1 auto-negotiate

src: 0:10.2.100.0/255.255.255.0:0 dst: 0:0.0.0.0/0.0.0.0:0

——————————————————

name=_OCVPN2-4.2 ver=2 serial=5 172.16.200.1:0->172.16.200.4:0 dst_mtu=1500 bound_if=11 lgwy=static/1 tun=intf/0 mode=auto/1 encap=none/528 options[0210]=create_dev frag-rfc accept_traffic=1

proxyid_num=2 child_num=0 refcnt=11 ilast=17 olast=17 ad=/0 stat: rxp=0 txp=0 rxb=0 txb=0

dpd: mode=on-demand on=1 idle=20000ms retry=3 count=0 seqno=0 natt: mode=none draft=0 interval=0 remote_port=0 proxyid=_OCVPN2-4.2 proto=0 sa=1 ref=2 serial=7 auto-negotiate

src: 0:10.2.100.0-10.2.100.255:0 dst: 0:172.16.102.0-172.16.102.255:0

SA: ref=3 options=18627 type=00 soft=0 mtu=1438 expire=42905/0B replaywin=2048 seqno=1 esn=0 replaywin_lastseq=00000000 itn=0 qat=0

life: type=01 bytes=0/0 timeout=42927/43200

dec: spi=c34bb751 esp=aes key=16 41449ee5ea43d3e1f80df05fc632cd44 ah=sha1 key=20 3ca2aea1c8764f35ccf987cdeca7cf6eb54331fb

enc: spi=f2d1f2d5 esp=aes key=16 9010dd57e502c6296b27a4649a45a6ba ah=sha1 key=20 caf86a176ce04464221543f15fc3c63fc573b8ee dec:pkts/bytes=0/0, enc:pkts/bytes=0/0

proxyid=_OCVPN2-4.2 proto=0 sa=0 ref=2 serial=1 auto-negotiate

src: 0:10.2.100.0/255.255.255.0:0 dst: 0:0.0.0.0/0.0.0.0:0

  • Branch_1 # get router info routing-table all
Routing table for VRF=0

Codes: K – kernel, C – connected, S – static, R – RIP, B – BGP
  O – OSPF, IA – OSPF inter area

N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2 E1 – OSPF external type 1, E2 – OSPF external type 2

i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area * – candidate default
S* 0.0.0.0/0 [10/0] via 172.16.200.254, port1
C 10.1.100.0/24 is directly connected, dmz
C 10.2.100.0/24 is directly connected, loop
C 11.101.1.0/24 is directly connected, wan1
C 11.102.1.0/24 is directly connected, wan2

S      192.168.5.0/24 [20/0] is directly connected, _OCVPN2-3.2

C      172.16.200.0/24 is directly connected, port1

S      172.16.101.0/24 [20/0] is directly connected, _OCVPN2-4.1

S      172.16.102.0/24 [20/0] is directly connected, _OCVPN2-4.2

S      192.168.4.0/24 [20/0] is directly connected, _OCVPN2-3.1

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This entry was posted in Administration Guides, FortiGate, FortiOS 6.2 on by .

About Mike

Michael Pruett, CISSP has a wide range of cyber-security and network engineering expertise. The plethora of vendors that resell hardware but have zero engineering knowledge resulting in the wrong hardware or configuration being deployed is a major pet peeve of Michael's. This site was started in an effort to spread information while providing the option of quality consulting services at a much lower price than Fortinet Professional Services. Owns PacketLlama.Com (Fortinet Hardware Sales) and Office Of The CISO, LLC (Cybersecurity consulting firm).

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