Sat, Mar 08, 2008 4:34 pm
Turning on Display of Account at Welcome Screen
I had turned off the display of an account at the Windows XP welcome screen
Hiding an Account from the Welcome Screen
) and needed to turn
it back on temporarily.
I checked the setting of the account from the command line with the
reg query command. The account for which I had hidden the account
from the welcome screen display was the administrator account in this case.
C:\Documents and Settings\Administrator>reg query "HKLM\Software\Microsoft\Windows NT\CurrentVersion\WinLogon\SpecialAccounts\UserList" /v Administrator
! REG.EXE VERSION 3.0
Administrator REG_DWORD 0x0
The value of zero for
HKLM\Software\Microsoft\Windows NT\CurrentVersion\WinLogon\SpecialAccounts\UserList\Administrator means the account is
not shown on the welcome screen.
I turned the display of that account back on with the
C:\Documents and Settings\Administrator>reg add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\WinLogon\SpecialAccounts\UserList" /v Administrator /t REG_DWORD /d 1
Value Administrator exists, overwrite(Y/N)? y
The operation completed successfully
I had to reboot for the administrator account to be displayed with the
other accounts on the system at the welcome screen. The picture chosen for
the administrator account was then shown with those for the other accounts,
allowing one to click on it to logon.
Sat, Mar 08, 2008 12:19 pm
Rdesktop on Solaris 10
I wanted to be able to use rdesktop
which is an open source client for Windows NT Terminal Server and Windows
2000/2003 Terminal Services, on an Intel-architecture Solaris 10 system,
so I downloaded the
Solaris 10 version of rdesktop
Since one of the requirements for rdesktop 1.5.0 was
, I installed it. I checked the version of
gcc on the system.
It was 3.4.3.
# /usr/sfw/bin/gcc -v
Reading specs from /usr/sfw/lib/gcc/i386-pc-solaris2.10/3.4.3/specs
Configured with: /builds/sfw10-gate/usr/src/cmd/gcc/gcc-3.4.3/configure --prefix=/usr/sfw --with-as=/usr/sfw/bin/gas --with-gnu-as --with-ld=/usr/ccs/bin/ld --without-gnu-ld --enable-languages=c,c++ --enable-shared
Thread model: posix
gcc version 3.4.3 (csl-sol210-3_4-branch+sol_rpath)
Version 3.4.6 was listed as a requirement, but I thought version 3.4.3 would
Another requirement listed for rdesktop 1.5.0 was
. I checked the version of OpenSSL on the system with
. OpenSSL 0.9.7d was already on the system.
# /usr/sfw/bin/openssl version
OpenSSL 0.9.7d 17 Mar 2004 (+ security patches to 2006-09-29)
After installing rdesktop 1.5.0, I checked to see if it would run with the
exiting 0.9.7d version of OpenSSL, but I received an error message when
I attempted to run it.
# /usr/local/bin/rdesktop -0 gna.insursol.com
ld.so.1: rdesktop: fatal: libcrypto.so.0.9.8: open failed: No such file or directory
I checked to see what OpenSSL package was already on the system and
saw the following:
# pkginfo | grep -i openssl
system SUNWopenssl-commands OpenSSL Commands (Usr)
system SUNWopenssl-include OpenSSL Header Files
system SUNWopenssl-libraries OpenSSL Libraries (Usr)
system SUNWopenssl-man OpenSSL Manual Pages
system SUNWopensslr OpenSSL (Root)
I checked for further information on the
package and saw the following:
# pkginfo -l SUNWopenssl-commands
NAME: OpenSSL Commands (Usr)
VENDOR: Sun Microsystems, Inc.
DESC: OpenSSL Commands (Use)
INSTDATE: Feb 03 2008 21:00
HOTLINE: Please contact your local service provider
STATUS: completely installed
FILES: 5 installed pathnames
3 shared pathnames
634 blocks used (approx)
I decided to download and install the
OpenSSL 0.9.8f package from
# gunzip openssl-0.9.8f-sol10-x86-local.gz
# pkgadd -d ./openssl-0.9.8f-sol10-x86-local
But, when I attempted to run the new version, which is installed in
/usr/local/ssl, I received an error message.
# /usr/local/ssl/bin/openssl version
ld.so.1: openssl: fatal: libgcc_s.so.1: open failed: No such file or directory
I checked to see what versions of
libgcc_s.so were installed
on the system and where they were located.
# find / -name libgcc_s.so\*
libgcc_s.so was located in
I then set
LD_LIBRARY_PATH to point to that directory. I was
then able to successfully run the version of openssl in
# export LD_LIBRARY_PATH
# /usr/local/ssl/bin/openssl version
OpenSSL 0.9.8f 11 Oct 2007
I was then able to use rdesktop on the Solaris 10 system to log into
a Windows Small Business Server (SBS) 2003 system as the administrator.
# /usr/local/bin/rdesktop -0 u administrator a.example.com
Note: if you use the above method of setting
and exporting it to run
rdesktop, you will need to do so each
time you open a new terminal window.
Fri, Mar 07, 2008 7:46 pm
I needed to determine the IP addresses of all the hosts on a
from a Solaris 10
system. I knew that all of them will respond to pings. To do so, I used
. The fping
program will allow you to quickly ping a range of hosts.
fping (Maintained by Thomas Dzubin)
fping is a ping(1) like program which uses the Internet Control Message
Protocol (ICMP) echo request to determine if a host is up. fping is
different from ping in that you can specify any number of hosts on
the command line, or specify a file containing the lists of hosts to
ping. Instead of trying one host until it timeouts or replies, fping will
send out a ping packet and move on to the next host in a round-robin
fashion. If a host replies, it is noted and removed from the list of
hosts to check. If a host does not respond within a certain time limit
and/or retry limit it will be considered unreachable.
Unlike ping, fping is meant to be used in scripts and its output is
easy to parse.
I downloaded the Intel architecture version of
fping for Solaris 10 from
Sunfreeware.com and installed it.
# gunzip fping-2.4b2-sol10-intel-local.gz
# pkgadd -d ./fping-2.4b2-sol10-intel-local
The following packages are available:
1 SMCfping fping
Select package(s) you wish to process (or 'all' to process
all packages). (default: all) [?,??,q]: 1
Processing package instance from
ZeroHype Technologies Inc.
Using as the package base directory.
## Processing package information.
## Processing system information.
3 package pathnames are already properly installed.
## Verifying disk space requirements.
## Checking for conflicts with packages already installed.
## Checking for setuid/setgid programs.
Installing fping as
## Installing part 1 of 1.
[ verifying class ]
Installation of was successful.
Program usage information is shown below:
# /usr/local/sbin/fping -h
Usage: /usr/local/sbin/fping [options] [targets...]
-a show targets that are alive
-A show targets by address
-b n amount of ping data to send, in bytes (default 56)
-B f set exponential backoff factor to f
-c n count of pings to send to each target (default 1)
-C n same as -c, report results in verbose format
-e show elapsed time on return packets
-f file read list of targets from a file ( - means stdin) (only if no -g specified)
-g generate target list (only if no -f specified)
(specify the start and end IP in the target list, or supply a IP netmask)
(ex. /usr/local/sbin/fping -g 192.168.1.0 192.168.1.255 or /usr/local/sbin/fping -g 192.168.1.0/24)
-i n interval between sending ping packets (in millisec) (default 25)
-l loop sending pings forever
-m ping multiple interfaces on target host
-n show targets by name (-d is equivalent)
-p n interval between ping packets to one target (in millisec)
(in looping and counting modes, default 1000)
-q quiet (don't show per-target/per-ping results)
-Q n same as -q, but show summary every n seconds
-r n number of retries (default 3)
-s print final stats
-t n individual target initial timeout (in millisec) (default 500)
-u show targets that are unreachable
-v show version
targets list of targets to check (if no -f specified)
If I wanted to determine what hosts in the 192.168.1.0 to 192.168.1.255 range
exist and can be pinged, I could use the command
fping -g 192.168.1.0
# /usr/local/sbin/fping -g 192.168.1.0 192.168.1.255
192.168.1.0 is alive [<- 192.168.1.44]
192.168.1.1 is alive
192.168.1.6 is alive
192.168.1.7 is alive
192.168.1.33 is alive
192.168.1.44 is alive
192.168.1.255 is alive [<- 192.168.1.44]
192.168.1.2 is unreachable
192.168.1.3 is unreachable
192.168.1.4 is unreachable
192.168.1.5 is unreachable
192.168.1.8 is unreachable
192.168.1.9 is unreachable
192.168.1.10 is unreachable
192.168.1.30 is unreachable
192.168.1.31 is unreachable
192.168.1.32 is unreachable
192.168.1.34 is unreachable
192.168.1.35 is unreachable
192.168.1.40 is unreachable
192.168.1.41 is unreachable
192.168.1.42 is unreachable
192.168.1.43 is unreachable
192.168.1.45 is unreachable
192.168.1.252 is unreachable
192.168.1.253 is unreachable
192.168.1.254 is unreachable
If I don't want anything displayed for IP addresses where there was no
response, I could use
fping -a -g <start address> <end
address>, as in the example below.
# /usr/local/sbin/fping -a -g 192.168.1.0 192.168.1.255
192.168.1.0 [<- 192.168.1.44]
192.168.1.255 [<- 192.168.1.44]
are network and broadcast addresses respectively, not hosts responding to
ping packets. The
192.168.1.44 address is the address of the
system from which I ran the ping command.
Fri, Mar 07, 2008 7:04 pm
Solaris Release Number
If you need to know the release number for Solaris 10 on a system, then
you can check
. You will see something like the
Solaris 10 6/06 s10x_u2wos_09a X86
Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
Use is subject to license terms.
Assembled 09 June 2006
At this time, the current marketing release is
Solaris 10 8/07
Tue, Mar 04, 2008 10:59 pm
Symantec AntiVirus VBN Files
utility can be used to extract
quarantined files from the VBN files Symantec AntiVirus Corporate
Edition 8.0 and 8.1 (and possibly other versions) creates when
it quarantines infected files.
[ More Info ]
Sun, Mar 02, 2008 1:56 pm
F-Secure Rescue CD 2.00
I've been using an
AVG Rescue CD
to boot Windows systems from a CD, rather than the copy
of Windows installed on the system's hard drive, and then perform an antivirus
scan of the system. The AVG Rescue CD provides a Windows
for performing scans
and I've found it works very well. The cost is currently $149.95 in U.S.
Searching for other rescue CD's, I also found one from
F-Secure, which uses a
Knoppix LiveCD to boot a system to
perform an antivirus scan of the system. You can use it to boot a Windows
system to check the system for viruses without booting into a possibly
infected copy of the Windows operating system.
F-Secure Rescue CD 2.00 is free and can update itself over the network,
if a DHCP server is
available on the network to provide it with
IP configuration information.
You don't need to understand Linux to use the software; you are presented
with prompts to walk you through the process of scanning a system.
[ More Info ]
Sat, Mar 01, 2008 7:17 pm
Pins 4 and 5 in RJ-45 Cabling
I put a connector on an unterminated RJ-45 cable to connect a new system to a
. I used the
Twisted Pair Connectors
for an explanation of the differences between
T568A and T568B) for the order of the pins in the connector.
I use a ByteBrothers
for cable testing. I plugged the end of the cable onto which I had
just placed a connector into the remote unit and plugged the main unit into
the patch panel at the other end of the able using one of the cables
that came with the TVR10/100 test devices. The remote unit showed all 4 pairs
were ok, but at the remote unit, as the LEDs cycled green, I saw that the
4,5 pair was skipped. I disconnected the remote unit and found that the 4,5
LED was still lit on the main unit, which was odd.
I double-checked the connector I had put on the cable; it looked fine.
I punched down the end at the patch panel again without pulling the cable
out of the punchdown block, but the problem remained. I then wondered
whether I really needed pins 4 and 5 working for a 10 Mbs or 100 Mbs Ethernet
connection. Turns out I didn't. I ran a patch cable from the port on the
patch panel to the network switch and plugged the other end of the cable
into my laptop; the network connection worked.
The manual for the TVR10/100 LAN Tester provides the following information
on the cable pairs required for 10 Mbs and 100 Mbs Ethernet connections.
If a cable problem disables data communications at 100 MB/s.
The problem could be caused by not enough connected pairs: 10Base-T
data communications only requires two pair cables. There are two 100Base-T
standards, one requires two pair cables and the other requires four wire
pair cables. If a two pair cable is used, when four pair cables is required,
a slow 10 MB/s connection will be permanently established. The cable problem
could be caused by inverted pairs. A pair exists, but the pins are inverted
(e.g. 1,2 is 2,1). Or the problem could be the cabling is not rated for
100 MB/s speeds ("category 5" cable).
|LAN Type||Cable Pairs
||3,6|| || |
|100Base-T (Type 1 or TX)
||1,2||3,6|| || |
|100Base-T (Type 2 or T4)
As shown in the above table, 10Base-T or 100Base-T (Type 1 or TX) LAN ports
use two pair cables. 100Base-T (Type 2 or T4) LANs require all four pairs. It is
best to use and install Category 5 cables with all four pairs to ensure
compatibility with all three types of Base-T LANs.
If there is a short or open on pairs 1, 2 and 3,6 all communications
will be prevented. If there is a short or open on pairs 4,5 or 7,8 the
data rate may drop to 10 MB/s.
A faulty cable with missing or faulty pairs 4,5 or 7,8 may cause the
data rate on that cable to drop to 10 MB/s If this faulty cable is
between a PC and hub, all data going to and from that single PC will
be at a slow rate. If the faulty cable is between two hubs then
communications will some times be quick and other times it will be
slow. Communications between PC connected to the same hub will
be quick. Communications betwen a PC on one hub across a
faulty cable to a PC on another hub will be slow. This type of
problem can be very difficult to find without a TVR10/100.
So, I should probably fix the problem when I have time, even though the cable
provides network connectivity at the moment.
There is a clear explanation of how to build an RJ-45 Ethernet cable
Building a RJ-45 Ethernet cable of a specific length (light version)
. A source explaining the difference between 568A and 568B standards
Twisted Pair Connectors.
How to wire Ethernet Cables is another good reference for Ethernet
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