Envisalink - TPI Documentation

Information and support for EnvisaLink modules.

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Posts: 22
Joined: Mon Aug 04, 2014 6:03 am

Re: Envisalink - TPI Documentation

Postby lonewolf » Tue Jan 29, 2019 8:47 pm

With only SSH access,

Code: Select all

tcpdump -p -n -i <interface> -X -s0 -w capturefile.pcap host <ip address>
is my go-to, and then just scp/rsync the capturefile.pcap file to your computer and open in Wireshark.

Yeah, it's almost certainly the re-use of the source port which is causing it. Since the EVL never dropped the connection, seeing a SYN on what it considers an already established connection is confusing it. I don't think this is specific to the EVL/TPI, I'd expect a hung connection as a possibility on any TCP server this happens to.

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