I have solved problems with Fortigate site-to-site IPsec VPN tunnels and SAP Servers in Amazon AWS Cloud for a Company in Singapore on 27 Oct 2021 Wed

Subject: I have solved problems with Fortigate site-to-site IPsec VPN tunnels and SAP Servers in Amazon AWS Cloud for a Company in Singapore on 27 Oct 2021 Wed


Good day from Singapore,


The situation is as follows.


Site-to-site IPsec VPN Tunnel 1 (SAP-VPN1) => Links Singapore Network and SAP Production Server in Amazon AWS.


Site-to-site IPsec VPN Tunnel 2 (SAP-VPN2) => Links Singapore Network and SAP Development Server in Amazon AWS.


Problem No. 1

==============


When SAP vendor connects to SSL VPN, they could not SSH into SAP Production and SAP Development servers.


My Solution

============


Go to Fortigate 200D Firewall.


Click Policy & Objects > IPv4 Policy.


Inside the firewall rule "SSL-VPN tunnel interface (ssl.root) to SAP-VPN1", add SSH under Service.


Inside the firewall rule "SSL-VPN tunnel interface (ssl.root) to SAP-VPN2", add SSH under Service.


Problem No. 2

=============


When SAP vendor tries to ping/access Singapore Server .16 from SAP Development Server, connection failed.


My Solution

============


My solution is to divert all traffic from Tunnel 2 to Tunnel 1, since no traffic flows through Tunnel 2 at all.


Go to Fortigate 200D firewall.


Click VPN > IPsec Tunnels


Expand Custom.


Click on the tunnel "SAP-VPN1".


Under Phase 2 Selectors, change Remote Address from x.x.81.64/255.255.255.255 to x.x.81.0/255.255.255.0.


Click Network > Static Routes


For the Destination: "SAP Production Server (.21 and .249)", it is already using the tunnel interface SAP-VPN1. No need to change.


For the Destination: "SAP Development Server (.64 and .65)", change the tunnel interface from SAP-VPN2 to SAP-VPN1.


This is to divert all traffic from Tunnel 2 to Tunnel 1.


Mr. Turritopsis Dohrnii Teo En Ming, 43 years old as of 31 Oct 2021, is a TARGETED INDIVIDUAL living in Singapore. He is an IT Consultant with a Systems Integrator (SI)/computer firm in Singapore. He is an IT enthusiast.





REFERENCES

===========


[1] https://lists.openswan.org/pipermail/users/2021-October/023804.html


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