User guide

Appendix F: Troubleshooting
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resolve.
This problem seems to stem from the Vista's implementation of
TCP auto tuning.
Vista's Enterprise (and Business) editions utilize an aggressive
scaling factor, which causes issues in packet segmentation,
leading to SSH handshake messages being split apart and
connection to never complete. The problem with Vista, is what
Vista is doing when it sees that the SX cannot support the window
scaling size of 8. Microsoft has described this problem at
http://support.microsoft.com/kb/929868/
http://support.microsoft.com/kb/929868/. SX cannot support a
window scaling of 8 at all, because there is insufficient memory to
support this level of packet buffering. When this scaling factor is
shrunk or disabled entirely, the SSH handshaking completes
correctly and the connection can be established.
To perform this on vista, run a cmd.exe shell at an elevated admin
level and execute the following command:
netsh interface tcp set global
autotuninglevel=highlyrestricted
- or -
netsh interface tcp set global
autotuninglevel=disable
iptables --list Hanging
If iptables --list hangs, it may be because the current rules are preventing
access to the DNS server from the Dominion SX. Execute iptables -n
--list to prevent DNS lookups from hanging this command.
Display Issue with Japanese Characters when Using Teraterm
When connecting to a Dominion SX serial port via Teraterm and then
setting the terminal language to Japanese (ja_JP:UTF8), the characters
are not displayed correctly. To avoid this issue, use RSC or Putty.