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yns_sa
New Contributor

Created on ‎06-09-2022 02:18 PM

IPsec site to site Sophos Fortinet not established

Hi all, 

Does someone successfully setup IPsec vpn between Sophos and Fortigate. If somebody can post working configuration I would appreciate.

thank you all
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19 REPLIES 19
ntaneja
Staff
Staff

Created on ‎06-10-2022 12:49 AM

Hi yns_sa

 

Please elaborate the issue you are facing in ipsec between fortigate and sophos?
Are you looking for document explaining config on devices OR you have done the required config and tunnel is not coming up or working as expected.

 

Thanks

4966
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seshuganesh
Staff
Staff

Created on ‎06-10-2022 01:04 AM

Hi Team,

 

Please execute the below commands in the fortigate firewall:

diag vpn ike log-filter dst-addr4 a.b.c.d (where a.b.c.d is the remote sophos public ip)

diag debug application ike -1

diag debug enable

 

Please try to make the tunnel up again, and then collect the logs.
Once you get required logs you can disable debug by executing this command "diag debug disable"

Please share output with us

4964
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sw2090
SuperUser
SuperUser

Created on ‎06-10-2022 01:10 AM Edited on ‎06-10-2022 01:12 AM

yeah logs would be good (thus even with them ipsec debugging sometimes is a pain in the a** [which is not fortinet's fault but more one of ipsec itself]).

Probably also a log of your sophos vpn might be helpful because it depends on which side the issue happens. If the error occurs on sophos side you might not see a clue of it in the FGT logs.

-- 

"It is a mistake to think you can solve any major problems just with potatoes." - Douglas Adams

-- "It is a mistake to think you can solve any major problems just with potatoes." - Douglas Adams
4963
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yns_sa
New Contributor

Created on ‎06-10-2022 06:57 AM

hi ALL 

find attached all logs on fortinet and sophos

ike 0:vpn_sophos:52503: out F15ECABF7640EF0E00000000000000000110020000000000000000A80D00003800000001000000010000002C010100010000002401010000800B0001800C151880010007800E010080030001800200048004000E0D000014AFCAD71368A1F1C96B8696FC775701000D0000144048B7D56EBCE88525E7DE7F00D6C2D30D0000184048B7D56EBCE88525E7DE7F00D6C2D3C0000000000000148299031757A36082C6A621DE00000000
ike 0:vpn_sophos:52503: sent IKE msg (P1_RETRANSMIT): 10.10.20.2:500->196.206.X.X:500, len=168, id=f15ecabf7640ef0e/0000000000000000
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue
ike 0:vpn_sophos:52503: out F15ECABF7640EF0E00000000000000000110020000000000000000A80D00003800000001000000010000002C010100010000002401010000800B0001800C151880010007800E010080030001800200048004000E0D000014AFCAD71368A1F1C96B8696FC775701000D0000144048B7D56EBCE88525E7DE7F00D6C2D30D0000184048B7D56EBCE88525E7DE7F00D6C2D3C0000000000000148299031757A36082C6A621DE00000000
ike 0:vpn_sophos:52503: sent IKE msg (P1_RETRANSMIT): 10.10.20.2:500->196.206.X.X:500, len=168, id=f15ecabf7640ef0e/0000000000000000
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue
ike 0:vpn_sophos:52503: negotiation timeout, deleting
ike 0:vpn_sophos: connection expiring due to phase1 down
ike 0:vpn_sophos: deleting
ike 0:vpn_sophos: deleted
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: created connection: 0x5519690 7 10.10.20.2->196.206.X.X:500.
ike 0:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:500 negotiating
ike 0:vpn_sophos: no suitable ISAKMP SA, queuing quick-mode request and initiating ISAKMP SA negotiation
ike 0:vpn_sophos:52504: initiator: main mode is sending 1st message...
ike 0:vpn_sophos:52504: cookie 512f40f8c4cd9442/0000000000000000
ike 0:vpn_sophos:52504: out 512F40F8C4CD944200000000000000000110020000000000000000A80D00003800000001000000010000002C010100010000002401010000800B0001800C151880010007800E010080030001800200048004000E0D000014AFCAD71368A1F1C96B8696FC775701000D0000144048B7D56EBCE88525E7DE7F00D6C2D30D0000184048B7D56EBCE88525E7DE7F00D6C2D3C0000000000000148299031757A36082C6A621DE00000000
ike 0:vpn_sophos:52504: sent IKE msg (ident_i1send): 10.10.20.2:500->196.206.X.X:500, len=168, id=512f40f8c4cd9442/0000000000000000
ike 0:vpn_sophos:52504: out 512F40F8C4CD944200000000000000000110020000000000000000A80D00003800000001000000010000002C010100010000002401010000800B0001800C151880010007800E010080030001800200048004000E0D000014AFCAD71368A1F1C96B8696FC775701000D0000144048B7D56EBCE88525E7DE7F00D6C2D30D0000184048B7D56EBCE88525E7DE7F00D6C2D3C0000000000000148299031757A36082C6A621DE00000000
ike 0:vpn_sophos:52504: sent IKE msg (P1_RETRANSMIT): 10.10.20.2:500->196.206.X.X:500, len=168, id=512f40f8c4cd9442/0000000000000000
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue
ike 0:vpn_sophos:52504: out 512F40F8C4CD944200000000000000000110020000000000000000A80D00003800000001000000010000002C010100010000002401010000800B0001800C151880010007800E010080030001800200048004000E0D000014AFCAD71368A1F1C96B8696FC775701000D0000144048B7D56EBCE88525E7DE7F00D6C2D30D0000184048B7D56EBCE88525E7DE7F00D6C2D3C0000000000000148299031757A36082C6A621DE00000000
ike 0:vpn_sophos:52504: sent IKE msg (P1_RETRANSMIT): 10.10.20.2:500->196.206.X.X:500, len=168, id=512f40f8c4cd9442/0000000000000000
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queuefortinet event.PNGsophos error.PNG

4939
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Muhammad_Haiqal
Staff
Staff
In response to yns_sa

Created on ‎06-12-2022 08:35 PM

Hi there,

I noticed below error:

ike 0:vpn_sophos: no suitable ISAKMP SA, queuing quick-mode request and initiating ISAKMP SA negotiation

Most probably the issue is on Phase2 subnet.
Please make sure both side, Fortigate and Sophos configured with same information. Avoid to use 0.0.0.0/0 segment as it may not "compatible" with Sophos to negotiation proper segment. 

haiqal
4904
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yns_sa
New Contributor
In response to Muhammad_Haiqal

Created on ‎06-13-2022 12:55 AM

Mr @Muhammad_Haiqal 

I don't use 0.0.0.0/0, i maked the correct subnet on both sides.

4897
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yns_sa
New Contributor

Created on ‎06-10-2022 07:00 AM Edited on ‎06-10-2022 07:00 AM

this is the configuration that i configured on both sides

How to config IPSec VPN Site-to-Site between Sophos and Fortinet with WAN IP as static IP – Techbast

4946
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nithincs
Staff
Staff

Created on ‎06-10-2022 07:58 AM Edited on ‎06-10-2022 07:59 AM

Hi yns_sa,

 

1. phase1 and phase2 ipsec proposal such as dh group, Authentication Encryption and key life is same on both end.
2. Run below sniffer command and see whether udpport 500 communication is happening between both the peers

 

fgt# dia sniffer packet any "host x.x.x.x and (port 500 or port 4500)" 4 0 l

 

Replace x.x.x.x with your remote peer ip.

If in case you are not seeing the reverse traffic from remote peer, please cross check whether udp port 500, 4500 and ESP packet are allowed b both the end ISP.

If there is a response, run the below debug and capture the ike debug logs.

 

diag vpn ike log-filter dst-addr4 x.x.x.x (where x.x.x.x is the remote sophos public ip)
diag debug application ike -1
diag debug enable

 

Please try to make the tunnel up again, and then collect the logs.
Once you get required logs you can disable debug by executing this command "diag debug disable"

Please share output with us

4941
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yns_sa
New Contributor

Created on ‎06-10-2022 08:08 AM

this is the output of diag vpn ike log-filter dst-addr4 x.x.x.x (where x.x.x.x is the remote sophos public ip)
diag debug application ike -1
diag debug enable

 

ike 0:vpn_sophos:52503: out F15ECABF7640EF0E00000000000000000110020000000000000000A80D00003800000001000000010000002C010100010000002401010000800B0001800C151880010007800E010080030001800200048004000E0D000014AFCAD71368A1F1C96B8696FC775701000D0000144048B7D56EBCE88525E7DE7F00D6C2D30D0000184048B7D56EBCE88525E7DE7F00D6C2D3C0000000000000148299031757A36082C6A621DE00000000
ike 0:vpn_sophos:52503: sent IKE msg (P1_RETRANSMIT): 10.10.20.2:500->196.206.X.X:500, len=168, id=f15ecabf7640ef0e/0000000000000000
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue
ike 0:vpn_sophos:52503: out F15ECABF7640EF0E00000000000000000110020000000000000000A80D00003800000001000000010000002C010100010000002401010000800B0001800C151880010007800E010080030001800200048004000E0D000014AFCAD71368A1F1C96B8696FC775701000D0000144048B7D56EBCE88525E7DE7F00D6C2D30D0000184048B7D56EBCE88525E7DE7F00D6C2D3C0000000000000148299031757A36082C6A621DE00000000
ike 0:vpn_sophos:52503: sent IKE msg (P1_RETRANSMIT): 10.10.20.2:500->196.206.X.X:500, len=168, id=f15ecabf7640ef0e/0000000000000000
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue
ike 0:vpn_sophos:52503: negotiation timeout, deleting
ike 0:vpn_sophos: connection expiring due to phase1 down
ike 0:vpn_sophos: deleting
ike 0:vpn_sophos: deleted
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: created connection: 0x5519690 7 10.10.20.2->196.206.X.X:500.
ike 0:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:500 negotiating
ike 0:vpn_sophos: no suitable ISAKMP SA, queuing quick-mode request and initiating ISAKMP SA negotiation
ike 0:vpn_sophos:52504: initiator: main mode is sending 1st message...
ike 0:vpn_sophos:52504: cookie 512f40f8c4cd9442/0000000000000000
ike 0:vpn_sophos:52504: out 512F40F8C4CD944200000000000000000110020000000000000000A80D00003800000001000000010000002C010100010000002401010000800B0001800C151880010007800E010080030001800200048004000E0D000014AFCAD71368A1F1C96B8696FC775701000D0000144048B7D56EBCE88525E7DE7F00D6C2D30D0000184048B7D56EBCE88525E7DE7F00D6C2D3C0000000000000148299031757A36082C6A621DE00000000
ike 0:vpn_sophos:52504: sent IKE msg (ident_i1send): 10.10.20.2:500->196.206.X.X:500, len=168, id=512f40f8c4cd9442/0000000000000000
ike 0:vpn_sophos:52504: out 512F40F8C4CD944200000000000000000110020000000000000000A80D00003800000001000000010000002C010100010000002401010000800B0001800C151880010007800E010080030001800200048004000E0D000014AFCAD71368A1F1C96B8696FC775701000D0000144048B7D56EBCE88525E7DE7F00D6C2D30D0000184048B7D56EBCE88525E7DE7F00D6C2D3C0000000000000148299031757A36082C6A621DE00000000
ike 0:vpn_sophos:52504: sent IKE msg (P1_RETRANSMIT): 10.10.20.2:500->196.206.X.X:500, len=168, id=512f40f8c4cd9442/0000000000000000
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue
ike 0:vpn_sophos:52504: out 512F40F8C4CD944200000000000000000110020000000000000000A80D00003800000001000000010000002C010100010000002401010000800B0001800C151880010007800E010080030001800200048004000E0D000014AFCAD71368A1F1C96B8696FC775701000D0000144048B7D56EBCE88525E7DE7F00D6C2D30D0000184048B7D56EBCE88525E7DE7F00D6C2D3C0000000000000148299031757A36082C6A621DE00000000
ike 0:vpn_sophos:52504: sent IKE msg (P1_RETRANSMIT): 10.10.20.2:500->196.206.X.X:500, len=168, id=512f40f8c4cd9442/0000000000000000
ike 0:vpn_sophos:vpn_sophos: IPsec SA connect 7 10.10.20.2->196.206.X.X:0
ike 0:vpn_sophos:vpn_sophos: using existing connection
ike 0:vpn_sophos:vpn_sophos: config found
ike 0:vpn_sophos: request is on the queue

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