I have a site to site vpn with a customer. I am able to access resources on the remote network however when the customer tries to access my remote network we see the following errors in the ipsec vpn log. When these errors occur I can no longer access his remote network.
2015:09:09-09:11:30 sofirewall pluto[11340]: "S_REF_IpsSitIroboKlTest_0" #113: sending encrypted notification INVALID_MESSAGE_ID to 192.58.132.1:500
2015:09:09-09:11:34 sofirewall pluto[11340]: "S_REF_IpsSitIroboKlTest_0" #113: Quick Mode I1 message is unacceptable because it uses a previously used Message ID 0x3266b2a9 (perhaps this is a duplicated packet)
I have read one post that says the remote gateway on the sophos firewall should be configured to "respond only". Currently iy is set to "Initiate connection".
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