06-09-2009
netfilter / iptables
HI,
Is the Netfilter and IPtables same?
Thanks & Regards
Arun
9 More Discussions You Might Find Interesting
1. Programming
Hi everybody,
I have to write a module for matching in netfilter , extending the netfilter but I'm facing some problems can somebody guide me in that. I know that I need to write matching module working in kernel space and a program in userspace. I went through the HOWTO on netfilter-hacking but... (0 Replies)
Discussion started by: Trusted Penguin
0 Replies
2. Programming
Friends I'm facing a big problem trying to extend the netfilter. Somone please help me with your quick reply (any hint) as I've to meet a deadline.
My problem is that I've written a new netfilter target module and its corresponding userspace program for iptables to change the packet type of a... (0 Replies)
Discussion started by: Rakesh Ranjan
0 Replies
3. Programming
Hello friends i'm trying to extend iptables to include a target by which we can change the packet type field of a packet.
For this i created a kernel module and a userspace extension.
Now i face the problem that when i try to invoke iptable with the target i created i get an error message saying... (1 Reply)
Discussion started by: Rakesh Ranjan
1 Replies
4. IP Networking
hi,
i'm using tcpreplay to send a traffic trace to my wireless interface (the trace is been captured by the same interface). It seems as netfilter can't trace connections. Is it possible? (0 Replies)
Discussion started by: littleboyblu
0 Replies
5. Cybersecurity
Hi everyone, I would like to allow multi users to access P2P networks, so I wonder if there's a way to tracking these kind of protocols with netfilter, and also compatibility with nat, like the module conntrack_ftp seems to do with the FTP protocol.
Thanks guys. (0 Replies)
Discussion started by: nekkro-kvlt
0 Replies
6. UNIX for Advanced & Expert Users
iam trying to built a firewall.so i have used netfilter for it.
in function main_hook sock_buff is returning null and in my log file continuously "sock buff null" is printed plse help to solve this problem..
(using print_string iam printing strings on current terminal (terminal we ping))
... (1 Reply)
Discussion started by: pavan6754
1 Replies
7. Linux
Hello,
Everyone knows that with PF_PACKET sockets one can "sniff" a determinated frame from the network device, but just that, see the frame without altering its action on the receiving host. What i want is to "intercept" the incoming frame and pass it through some rules, and if it doesn't pass... (9 Replies)
Discussion started by: Zykl0n-B
9 Replies
8. Cybersecurity
Hi all,
I would like to get some ideas and opinions on matter of libvirt netfilter application in KVM environment. I am looking for some easy way to control it with an API and possible experience with that and its performance in real life application.
Thanks for all ideas (0 Replies)
Discussion started by: smoofy
0 Replies
9. Cybersecurity
Hello,
on a PC with Debian 8 I try to use a Bash script with Netfilter rules so that only traffic goes in and out that is wanted. For that I set all 3 default policies to "drop". The machine uses DHCP to get its IP, gateway and DNS. And I never checked so I was quite surprised that my... (1 Reply)
Discussion started by: SInt
1 Replies
LEARN ABOUT FREEBSD
strings
STRINGS(1) BSD General Commands Manual STRINGS(1)
NAME
strings -- print the strings of printable characters in files
SYNOPSIS
strings [-a | --all] [-e encoding | --encoding=encoding] [-f | --print-file-name] [-h | --help] [-n number | --bytes=number | -number] [-o]
[-t radix | --radix=radix] [-v | --version] [file ...]
DESCRIPTION
For each file specified, the strings utility prints contiguous sequences of printable characters that are at least n characters long and are
followed by an unprintable character. The default value of n is 4. By default, the strings utility only scans the initialized and loaded
sections of ELF objects; for other file types, the entire file is scanned. The strings utility is mainly used for determining the contents
of non-text files.
If no file name is specified as an argument, standard input is read.
The following options are available:
-a | --all
For ELF objects, scan the entire file for printable strings.
-e encoding | --encoding=encoding
Select the character encoding to be used while searching for strings. Valid values for argument encoding are:
s for single 7-bit-byte characters (ASCII, ISO 8859).
S for single 8-bit-byte characters.
l for 16-bit little-endian.
b for 16-bit big-endian.
L for 32-bit little-endian.
B for 32-bit big-endian.
The default is to assume that characters are encoded using a single 7-bit byte.
-f | --print-file-name
Print the name of the file before each string.
-h | --help
Print a usage summary and exit.
-n number | --bytes=number | -number
Print the contiguous character sequence of at least number characters long, instead of the default of 4 characters.
-o Equivalent to specifying -t o.
-t radix | --radix=radix
Print the offset from the start of the file before each string using the specified radix. Valid values for argument radix are:
d for decimal
o for octal
x for hexadecimal
-v | --version
Display a version identifier and exit.
EXIT STATUS
The strings utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
To display strings in /bin/ls use:
$ strings /bin/ls
To display strings in all sections of /bin/ln use:
$ strings -a /bin/ln
To display strings in all sections of /bin/cat prefixed with the filename and the offset within the file use:
$ strings -a -f -t x /bin/cat
SEE ALSO
ar(1), nm(1), objdump(1), ranlib, readelf(1), size(1)
HISTORY
The first FreeBSD strings utility appeared in FreeBSD v3. It was later discontinued in FreeBSD v5, when i386-only a.out format was dropped in
favor of ELF.
AUTHORS
The strings utility was re-written by S.Sam Arun Raj <samarunraj@gmail.com>. This manual page was written by S.Sam Arun Raj
<samarunraj@gmail.com>.
BSD
December 19, 2011 BSD