SE Phone home to University of Tsukaba IP

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dci_james
Posts: 2
Joined: Wed Aug 26, 2015 9:27 pm

SE Phone home to University of Tsukaba IP

Post by dci_james » Wed Aug 26, 2015 9:29 pm

I keep seeing connections in my firewall that are connecting to 130.158.6.60, which is a university IP. Why on earth does SEVPN phone home? What is it doing?

LAN udp 130.158.6.60:5004 <- 10.0.0.250:9292 MULTIPLE:MULTIPLE
WAN udp 50.233.9.78:9292 (10.0.0.250:9292) -> 130.158.6.60:5004 MULTIPLE:MULTIPLE

thisjun
Posts: 2458
Joined: Mon Feb 24, 2014 11:03 am

Re: SE Phone home to University of Tsukaba IP

Post by thisjun » Thu Sep 03, 2015 7:54 am

This use for NAT-T or DDNS.

dci_james
Posts: 2
Joined: Wed Aug 26, 2015 9:27 pm

Re: SE Phone home to University of Tsukaba IP

Post by dci_james » Wed Sep 09, 2015 11:26 pm

I have DDNS disabled, why would a NAT-T session have to phone home?

thisjun
Posts: 2458
Joined: Mon Feb 24, 2014 11:03 am

Re: SE Phone home to University of Tsukaba IP

Post by thisjun » Wed Sep 16, 2015 8:54 am

Please google UDP-hole-punching.

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