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Cannot Connect to SUM Server Behind UTM

tscott_16
I have a SUM server that was originally behind a basic Linksys router and in order for my UTM's to connect to it, I just forwarded port 4433.

I've now replaced the Linksys with a UTM but I can't figure out the correct firewall/NAT configuration to allow the external UTM's to reach the SUM server.

The external UTM's have the correct IP of the SUM server.
I have a DNAT rule:
From: Any > Service: Sophos UTM Manager (SUM) > To: External (WAN)
Change To: SUM Server > Service: Sophos UTM Manager (SUM).

I also have a firewall rule:
Any > Sophos UTM Manager (SUM) > Any.

On the external UTM's the connection status says:
[1] SUM SSL-connect: 'IO::Socket::INET6 configuration failed'.


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  • 0
    I'm still digging around on this but no luck. I can see in the firewall log that packets are being passed through to the SUM server, however, in Wireshark I'm just seeing a bunch of TCP Retransmissions. I'm not sure what this is actually indicating, though. Any ideas?
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  • 0
    I'm still digging around on this but no luck. I can see in the firewall log that packets are being passed through to the SUM server, however, in Wireshark I'm just seeing a bunch of TCP Retransmissions. I'm not sure what this is actually indicating, though. Any ideas?
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