May I assume that there is no point to format your SD Card (assume you have the 32 GB size) to NTFS if the device can support SD Card of up to 32 GB and FAT32 maximum limit is also exactly 32 GB?
"Crest Accountants
Suite E316, Level 3 Oracle East Building 3 Oracle Boulevard Broadbeach QLD 4218,... (1 Reply)
Hello, all. My english is not good.
I have a problem installing FreeBsd.
I have not CD-Roms, so i use program FlashBoot for convert iso-image to USB Device.
After, I was beginning to install FreeBsd (Sorry my english)
When it's time to choose an installation media, i select 9 USB:... (3 Replies)
Hi,
I am running a JDBC:ODBC code to access .mdb file in my windows system successfully but, not able to access MS Access mdb file in AIX Unix box. when I am trying to run the same piece of code in AIX Unix box it is saying "No Suitable Driver". I need some immediate help. (0 Replies)
Hello there. I installed NetBSD yesterday on an older system to try it out. Everytime I boot, I have to enter in the root device (disk) manually wd0 which then proceeds into asking to define the dump device: is the default then, the sbin/init My question is where am I supposed to... (1 Reply)
hi all
waiting for a device /dev/sda2 to appear:... not found -- device nodes: console disk fb0 full hdc input kmem kmsg loop0 loop1 loop2 loop3... (1 Reply)
sudo tcpdump -s 3600 -q -nxS -i en1 'ip and port 80' -w - | strings
this gives me a tcpdump: syntax error and i dont know why.
plz help
thanks a lot
andrew ;) (1 Reply)
hi all
im making a script for backing up a specific filesystem that is an output of our DB13(SAP) into tape..which is around 40g +
which is suitable tar or backup command
i heard tar has limitations ..i heard it can only backup upto 2 gig??? is this ryt?
and ill put this into cron.
... (6 Replies)
I have a Toshiba Satellite 1135 laptop, and i want to install a fedora core edition in my external USB hard drive.
I have
Intel celeron 1.8 ghz processor
256 mb ram.
Please suggest if there are other suitable linux OS which would be better than fedora core. (2 Replies)
Hi all.
I'm currently building my own webmail server but I will need to collect my mail from several different account scattered around the 'Net.
I know fetchmail can do this. The problem I have is that my main POP3 mailbox at my ISP lumps all users' e-mails into one box.
This means that... (0 Replies)
Hi,
I'm trying to use tcpdump for the first time. I installed tcpdump from the rpm. Now when I issue the command tcpdump port 6666, I get an error
tcpdump: no suitable device found
Can you tell me what's wrong there?
Thanks. (5 Replies)
nstreams(1) Users Manuals nstreams(1)NAME
network streams - a tcpdump output analyzer
SYNOPSIS
nstreams [ -v ] [ -c nstreams-services ] [ -n nstreams-networks_file ] [ -N [ -i ] [ -I ]] [ -r ] [ -O output [ -D iface ] [ -Y ]] [ -u ] [
-U ] [ -B ] [ -f tcpdump_file ] [ -l <iface> ] [ tcpdump output ]
DESCRIPTION
nstreams is a utility designed to identify the IP streams that are occuring on a network from a non-user friendly tcpdump output of several
megabytes.
This is especially useful when you plan to install a firewall but if you do not know the nstreams that the network users are generating
(http, real audio, and more...). nstreams can read the tcpdump output directly from stdin, or from a file. It can even generate the con-
figuration file of your firewall, using the -O option.
OPTIONS -c <nstreams-services-file>
The path to an alternate nstreams service file. This file is used to identify each protocol. See the services file section later in
this manual page.
-n <nstreams-networks-file>
The path to an alternate nstreams network file. This file is used to identify which hosts belong to which network. See the networks
file section later in this manual page.
-f <tcpdump output file>
The path to the file to read data from. This file must have been generated using 'tcpdump -w filename'.
-l <iface>
Listen directly on interface <iface>. This avoids the use of tcpdump.
-N print the networks names instead of the hosts IP addresses. The intra-network traffic will not be shown. Use this option twice to
show the networks IP address instead of their names.
-i Also show the intra-network traffic (must be used with -N)
-I Only show the intra-network traffic (must be used with -N)
-r be redundant. That is, the same streams will be printed each time they appear in the dump.
-v print version number and exit.
-O <type>
output type. You can use this option to generate your firewall startup script. Do nstreams -h to see the supported output types.
-D <iface>
interface to apply to output onto. Must be used with -O.
-Y The firewall rules that will be generated will deny all packets coming from the outside trying to establish connections to the
inside. If you system is not serving anything, then it's safe to turn on this option.
-u Do not print the unknown streams
-U Only print the unknown streams
-B Show broadcasts and networks
USAGE
Let tcpdump(1) run some time on your network (like one week), and save its output in a file, by doing :
tcpdump -l -n > output
or
tcpdump -w filename
Then, feed nstreams with this output file, and it will turn it into a easily-readable file which will help you to write efficient firewall
filters. You may also do :
tcpdump -l -n | nstreams
or
nstreams -f filename (if you used tcpdump -w)
THE SERVICES FILE
The service file contains the description of each protocol, as well as their name. Its syntax is :
protocol_name:server_port(s)/{udp,tcp}:client_ports(s)
or :
protocol_name:type(s)/icmp:code(s)
Whereas :
protocol_name
is the name of the protocol described. This name may contain any character, including space, except ':'.
server_port(s)
is the range of ports used by the server. Usually, you will want to define one server port only, but you may enter any range you
want.
ip_protocol
is the IP protocol that this protocol is lying onto. Acceptable values are tcp and udp
client_port(s)
is the range of ports that the client may use. You can set this to any or, for more accurate results, to ports ranges, like
'1-1024,2048-4096'.
The rules are : 'first match, first taken'.
SERVICE FILE EXAMPLE
Using this syntax, you would declare the ssh protocol by :
ssh-unix:22/tcp:1000-1023
Because the Unix version of the ssh client uses a privileged port to connect onto the ssh server which listens on port 22.
THE NETWORKS FILE
The networks file is used to define sets and subsets of hosts (also known as networks). This avoids redundancy in the output file. The syn-
tax format for this file is :
network name:ip/mask
Whereas the network name is whatever you want, the IP is the ip of the network, and the mask is the CIDR netmask of the network. The rule
is 'first match, first taken'.
NETWORKS FILE EXAMPLE
admin:192.168.19.0/29
whole_subnet:192.168.0.0/16
internet:0.0.0.0/0
LIMITS
o nstreams can only parse the output of 'tcpdump -n'
o Even though the output of nstreams is easier to read than the one of tcpdump, it is still not easily readable. Use sort(1) on the nstream
output to get a more readable file.
o This program could have been written in perl
FILES
/etc/nstreams-services
/etc/nstreams-networks
SEE ALSO tcpdump(1)AUTHORS
Concept : Herve Schauer Consultants - http://www.hsc.fr
Coding : Renaud Deraison <deraison@cvs.nessus.org>
BUG REPORTS
Please send all your bug reports with the detail of your configuration to Renaud Deraison <deraison@cvs.nessus.org>
nstreams July 1999 nstreams(1)