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VPN going down - No route to host

We have a site to site VPN set up between two of our sites. Both sites are using UTMs. The VPN has worked perfectly for months. No changes have been made.

In the last couple of weeks the VPN has dropped four times for less than a minute. The error logged is:
/var/log/ipsec.log:2019:08:12-00:38:12 perimeter1-1 pluto[7754]: ERROR: asynchronous network error report on eth6 for message to 10.10.39.7 port 500, complainant 10.10.39.1: No route to host [errno 113, origin ICMP type 3 code 1 (not authenticated)]

Our ISP hasn't found anything, but I don't trust them.

Can anyone tell me what's going on?



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  • I'm confused, Steve - do you have 10. public IPs?  Is this site-to-site or Remote Access?

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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  • I'm confused, Steve - do you have 10. public IPs?  Is this site-to-site or Remote Access?

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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