[PLUG] Deciphering ethereal capture
Galen Seitz
galens at seitzassoc.com
Thu Jun 27 15:19:16 UTC 2002
Just wanted to confirm that I see the same problem here.
ncftp version mode results
3.0.0 active works
3.0.0 passive works
3.0.3 active works
3.0.3 ext passive hangs
Note that 3.0.0 is running on a rh 6.2 box, and 3.0.3 is on a rh 7.2 box.
Each machine is behind its own floppyfw firewall. The two firewalls
are similarly configured.
Looking at the hang, I see the server respond to the extended passive
request, but it never responds to the connection setup on the second
port.
62 22.623059 boron.seitzassoc.com 159.121.106.248 FTP Request: EPSV
63 22.665843 159.121.106.248 boron.seitzassoc.com FTP Response: 229 Entering Extended Passive
64 22.665894 boron.seitzassoc.com 159.121.106.248 TCP 1726 > ftp [ACK] Seq=1013144841 Ack=399556790 Win=5840 Len=0
65 22.666071 boron.seitzassoc.com 159.121.106.248 TCP 1727 > 51124 [SYN] Seq=1020129287 Ack=0 Win=5840 Len=0
66 25.663831 boron.seitzassoc.com 159.121.106.248 TCP 1727 > 51124 [SYN] Seq=1020129287 Ack=0 Win=5840 Len=0
67 31.663448 boron.seitzassoc.com 159.121.106.248 TCP 1727 > 51124 [SYN] Seq=1020129287 Ack=0 Win=5840 Len=0
galen
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