nmap -sS 192.168.1.1
Starting Nmap 4.53 ( http://insecure.org ) at 2009-06-12 10:11 MDT
Interesting ports on 192.168.1.1 (192.168.1.1):
Not shown: 1683 closed ports
PORT STATE SERVICE
1/tcp filtered tcpmux
4/tcp filtered unknown
7/tcp filtered echo
8/tcp filtered unknown
10/tcp filtered unknown
13/tcp filtered daytime
14/tcp filtered unknown
18/tcp filtered msp
19/tcp filtered chargen
21/tcp open ftp
22/tcp open ssh
23/tcp filtered telnet
25/tcp filtered smtp
53/tcp filtered domain
80/tcp open http
110/tcp open pop3
137/tcp filtered netbios-ns
194/tcp filtered irc
445/tcp filtered microsoft-ds
529/tcp filtered irc
873/tcp open rsync
994/tcp filtered ircs
1026/tcp filtered LSA-or-nterm
1434/tcp filtered ms-sql-m
4000/tcp open remoteanything
6000/tcp filtered X11
6662/tcp filtered radmind
6667/tcp filtered irc
6669/tcp filtered irc
7000/tcp filtered afs3-fileserver
32773/tcp filtered sometimes-rpc9

Nmap done: 1 IP address (1 host up) scanned in 4.500 seconds


Don’t get me wrong, I definitely appreciate the power that the ruby language and RoR framework provides.   But, face it, if you’re used to Java, the ruby syntax can be …hmmm…. unfamiliar.

My first obstacle was figuring out file extensions:

• .erb are embedded ruby tags, e.g. <%.  May see an html.erb file.
• .rb are ruby scripts or RoR class files
• .rhtml - ruby on rails script (application/x-httpd-eruby)

That’s when I found a helpful site called filext.com which is pretty good for looking up file extensions.

By the way, URLMonitor just sends out an HTTP request.   In our application if the timer went off URLMonitor.stop() was called and the application exited.

Upon exit(), the application would disappear from Windows Task Manager, but the process would still be in the task list.   By running a netstat, we saw that the process still held a socket in the SYN_SENT state.  (For a pretty good diagram of TCP socket state machine, see wikipedia.)

In Windows, the process wouldn’t return to the OS or .bat file, until this socket state was cleared up.

As anyone who has ever done protocol work knows, you tend to refer heavily on the RFC’s or ITU specs. Here is a list of the RFC’s that I found especially helpful when working on this SIP B2BUA project:

• RFC 3261, SIP: Session Initiation Protocol, http://www.faqs.org/rfcs/rfc3261.html
• RFC 3262, Reliability of Provisional Responses in the Session Initiation Protocol (SIP), http://www.ietf.org/rfc/rfc3262.txt
• RFC 3372, Session Initiation Protocol for Telephones (SIP-T): Context and Architectures, http://www.ietf.org/rfc/rfc3372.txt
• RFC 3204, MIME media types for ISUP and QSIG Objects, http://www.ietf.org/rfc/rfc3204.txt
• RFC 3325, Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks, http://www.ietf.org/rfc/rfc3325.txt

terry@c103:~$ ldd /bin/bash
linux-gate.so.1 => (0xffffe000)
libncurses.so.5 => /lib/libncurses.so.5 (0xb7f07000)
libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0xb7f03000)
libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7dc1000)
/lib/ld-linux.so.2 (0xb7f59000)
terry@c103:~$

If any of the libraries are not found, they will show up as missing. Use the LD_LIBRARY_PATH environment variable to add in the path to the missing libraries.
terry@c103:~$ export LD_LIBRARY_PATH=~/lib
terry@c103:~$ env | grep LD
LD_LIBRARY_PATH=/home/terry/lib
terry@c103:~$

sox -t wav recv0.wav -c 1 -r 8000 -s -w recv0.raw

The sox program is available under Ubuntu as an optional package. Adobe has a nice audio editing utility, but there are some good free ones as well. Two that I’ve used include Audacity and there is an audio studio program on Sourceforge. The audio studio program is a front end for sox and very simple, but it does the job for simple work.

chkconfig mysqld on

The service command can be used to start or stop services.

service mysqld start

instead of the old

/etc/init.d/mysqld start

The service command is not too useful, but the chkconfig command is.

cd /media/sdcard ;
ogg2mp3 /home/terry/jukebox/Yeah_Yeah_Yeahs/Show_Your_Bones/*

The script looks like this…

USAGE=false
if [ ! -f "$1" ]
then
echo "Usage $0 sourceFiles ..."
exit 1
fi TMPFILE=/tmp/tmp$$.wav
while [ $# -gt 0 ]
do
ogg123 -d wav -f $TMPFILE "$1"
DIRNAME=`dirname "$1"`
ALBUM=`basename $DIRNAME`
TMP=`dirname $DIRNAME`
ARTIST=`basename $TMP`
MP3FILE=`basename "$1" | sed -e 's/.ogg/.mp3/' | sed -e     's/^[0-9][0-9] - //'`
OUTFILE="${ARTIST}_${MP3FILE}"
echo "-------------$OUTFILE"
lame $TMPFILE "$OUTFILE"
shift
done
rm -f $TMPFILE

keyfile=/etc/ssl/private/smtpd.key
certfile=/etc/ssl/certs/smtpd.crt
pemfile= /etc/ssl/certs/cacert.pem
pass=superSecret
openssl genrsa -des3 -rand /etc/hosts -passout "pass:$pass" -out $keyfile 1024
chmod 600 $keyfile
openssl req -new -passin "pass:$pass" -passout "pass:$pass" -key $keyfile -out /tmp/.server.csr
openssl x509 -req -days 3650 -passin "pass:$pass" -passout "pass:$pass" -in /tmp/.server.csr -signkey $keyfile -out $certfile
openssl rsa -passin "pass:$pass" -in $keyfile -out /tmp/.server.unencrypted
mv -f /tmp/.key.unencrypted $keyfile
openssl req -new -x509 -extensions v3_ca -keyout cakey.pem -out $pemfile -days 3650

ssh -p 404 www.tiptopsoftwarecompany.com