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<DIV><FONT face=Arial size=2><SPAN class=032163401-31012007>I looked at my
iptables entries, nothing looking like any problem there. I then got Wireshark
installed on my windoze computer, and captured my Putty session with my cluster.
The cluster system is at local address 192.168.0.200, and the connecting client
system is at 192.168.0.207. The system connects ok, and works for a while, but
eventually goes dormant, apparently coinciding with an ARP request from the
cluster that appears to be properly responded to by the client. I can send the
complete Wireshark capture file if anyone thinks it would be helpful. The last
few lines I include below, showing a DX spot received, and then ~100 seconds
later, 2 ARP requests initiated by the cluster, that were replied to. After
that, typing on the Putty session does not appear to go out at all. Eventually
Putty realizes the session is dead.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=032163401-31012007></SPAN></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN
class=032163401-31012007>No.
Time
Source
Destination Protocol
Info<BR> 104 531.095234
192.168.0.200
192.168.0.207
TCP 8000 > 1075 [PSH, ACK] Seq=1809 Ack=59
Win=5840 Len=79</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007>Frame 104
(133 bytes on wire, 133 bytes captured)<BR>Ethernet II, Src: LannerEl_00:34:7f
(00:90:0b:00:34:7f), Dst: 3Com_4a:61:7f (00:04:76:4a:61:7f)<BR>Internet
Protocol, Src: 192.168.0.200 (192.168.0.200), Dst: 192.168.0.207
(192.168.0.207)<BR>Transmission Control Protocol, Src Port: 8000 (8000), Dst
Port: 1075 (1075), Seq: 1809, Ack: 59, Len: 79<BR>Data (79
bytes)</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007>0000
44 58 20 64 65 20 41 44 35 56 4a 3a 20 20 20 20 DX de
AD5VJ: <BR>0010 20 20 37 30 31 34 2e 34 20 20 36 48 31
4c 20 20 7014.4 6H1L <BR>0020 20 20 20
20 20 20 20 43 57 20 20 20 20 20 20
20
CW <BR>0030 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20
20
<BR>0040 20 20 20 20 20 20 30 35 34 30 5a 07 07 0d
0a
0540Z....</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN
class=032163401-31012007>No.
Time
Source
Destination Protocol
Info<BR> 105 531.245876
192.168.0.207
192.168.0.200
TCP 1075 > 8000 [ACK] Seq=59 Ack=1888 Win=65018
Len=0</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007>Frame 105
(54 bytes on wire, 54 bytes captured)<BR>Ethernet II, Src: 3Com_4a:61:7f
(00:04:76:4a:61:7f), Dst: LannerEl_00:34:7f (00:90:0b:00:34:7f)<BR>Internet
Protocol, Src: 192.168.0.207 (192.168.0.207), Dst: 192.168.0.200
(192.168.0.200)<BR>Transmission Control Protocol, Src Port: 1075 (1075), Dst
Port: 8000 (8000), Seq: 59, Ack: 1888, Len: 0</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN
class=032163401-31012007>No.
Time
Source
Destination Protocol
Info<BR> 106 775.834244
LannerEl_00:34:7f
3Com_4a:61:7f
ARP Who has 192.168.0.207? Tell
192.168.0.200</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007>Frame 106
(60 bytes on wire, 60 bytes captured)<BR>Ethernet II, Src: LannerEl_00:34:7f
(00:90:0b:00:34:7f), Dst: 3Com_4a:61:7f (00:04:76:4a:61:7f)<BR>Address
Resolution Protocol (request)</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN
class=032163401-31012007>No.
Time
Source
Destination Protocol
Info<BR> 107 775.834282
3Com_4a:61:7f
LannerEl_00:34:7f ARP
192.168.0.207 is at 00:04:76:4a:61:7f</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007>Frame 107
(42 bytes on wire, 42 bytes captured)<BR>Ethernet II, Src: 3Com_4a:61:7f
(00:04:76:4a:61:7f), Dst: LannerEl_00:34:7f (00:90:0b:00:34:7f)<BR>Address
Resolution Protocol (reply)</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN
class=032163401-31012007>No.
Time
Source
Destination Protocol
Info<BR> 108 885.463257
LannerEl_00:34:7f
3Com_4a:61:7f
ARP Who has 192.168.0.207? Tell
192.168.0.200</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007>Frame 108
(60 bytes on wire, 60 bytes captured)<BR>Ethernet II, Src: LannerEl_00:34:7f
(00:90:0b:00:34:7f), Dst: 3Com_4a:61:7f (00:04:76:4a:61:7f)<BR>Address
Resolution Protocol (request)</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN
class=032163401-31012007>No.
Time
Source
Destination Protocol
Info<BR> 109 885.463292
3Com_4a:61:7f
LannerEl_00:34:7f ARP
192.168.0.207 is at 00:04:76:4a:61:7f</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007>Frame 109
(42 bytes on wire, 42 bytes captured)<BR>Ethernet II, Src: 3Com_4a:61:7f
(00:04:76:4a:61:7f), Dst: LannerEl_00:34:7f (00:90:0b:00:34:7f)<BR>Address
Resolution Protocol (reply)</SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2><SPAN
class=032163401-31012007></SPAN></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007><FONT
face=Arial>Any ideas what the problem is?</FONT></SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007><FONT
face=Arial></FONT></SPAN></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007><FONT
face=Arial>ML</FONT></SPAN></FONT></DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=032163401-31012007><FONT
face=Arial></FONT> </DIV>
<DIV><BR></DIV></SPAN></FONT></BODY></HTML>