Sguil 0.7-CVS client on Ubuntu Gutsy

Last week I installed Ubuntu Gutsy on my laptop. I did a clean install, which went fine. Of course, I needed the Sguil client on it as well. Gutsy has all the required libraries in it’s repositories. Install the following packages:

tcl8.4
tclx8.4
tcllib
tk8.4
iwidgets4

Checking out the Sguil client is easy (make sure you have ‘cvs’ installed):

cvs -d:pserver:anonymous@sguil.cvs.sourceforge.net:/cvsroot/sguil login
cvs -d:pserver:anonymous@sguil.cvs.sourceforge.net:/cvsroot/sguil co sguil

After this the client runs fine on my system.

Update on Sguil 0.7-CVS client on Ubuntu Feisty

A short time ago I wrote about how the Sguil 0.7-CVS client can be installed on Ubuntu Feisty. Since then there has been a change to Sguil that changes the requirements a bit. Because of this the standard tcllib package in Feisty is no longer usable. It provides tcllib 1.8 while Sguil now needs 1.9. Luckily, we can use the tcllib package from the upcoming Ubuntu release called ‘Gutsy’. It can be found here: http://packages.ubuntu.com/gutsy/interpreters/tcllib

I installed it with this command:

$ sudo dpkg –install tcllib_1.9.dfsg1-1_all.deb

This made Sguil 0.7-CVS work again on my system.

Compiling Snort_inline with NFQUEUE support on Ubuntu

I needed to setup the right libraries for Snort_inline development on my fresh Ubuntu Feisty installation, so I decided to write down the procedure for those who think compiling Snort_inline from source is hard. 🙂

Make sure you have build-essential package installed. This makes sure you have a compiler and development packages for glibc and other important libraries. I’m installing the libraries from source to get the latest versions because the latest versions are more stable and perform better than the versions included in Feisty. I’m installing them into /usr because some programs like them there best.

Download the library libnfnetlink version 0.0.25 from http://ftp.netfilter.org/pub/libnfnetlink/

$ tar xvfj libnfnetlink-0.0.25.tar.bz2
$ cd libnfnetlink-0.0.25/
$ ./configure --prefix=/usr
$ make
$ sudo make install

Next download libnetfilter_queue version 0.0.13 from http://ftp.netfilter.org/pub/libnetfilter_queue/

$ tar xvfj libnetfilter_queue-0.0.13.tar.bz2
$ cd libnetfilter_queue-0.0.13
$ ./configure --prefix=/usr
$ make
$ sudo make install

Okay, that sets up the Netfilter libraries.

Next is the installation of libdnet. Do not use the dnet packages from Debian and Ubuntu because this is not the same library as we need for Snort_inline.

Download libdnet 1.11 from http://libdnet.sourceforge.net/

$ tar xzvf libdnet-1.11.tar.gz
$ cd libdnet-1.11
$ ./configure --prefix=/usr
$ make
$ sudo make install

Download snort_inline 2.6.1.5 from http://snort-inline.sourceforge.net/

$ tar xvzf snort_inline-2.6.1.5.tar.gz
$ cd snort_inline-2.6.1.5
$ ./configure --enable-nfnetlink
$ make
$ sudo make install

Test if it works (as root):

# iptables -A OUTPUT -p icmp -j NFQUEUE
# iptables -A INPUT -p icmp -j NFQUEUE
# /usr/local/bin/snort_inline -v -Q -H0

Then ping some host and you should see Snort_inline display the packets. If it doesn’t work, it might be that the kernel modules needed for nfqueue are not yet loaded. Using ‘lsmod’ check if ‘nfnetlink’ and ‘nfnetlink_queue’ are loaded. If not, load them manually.

After this, setup Snort_inline as normal.

Sguil 0.7-CVS client on Ubuntu Feisty

I just got a new workstation that I’m setting up today with Ubuntu Feisty 7.04. When setting up the Sguil client from CVS I needed to install the following packages (including dependencies, but apt-get takes care of that):

tcl8.4
tclx8.4
tcllib
tk8.4
iwidgets4

After this it ran but looked horrible because of some ugly font that was used. I found that for my use the following fonts look good:

standard: Bitstream Vera Sans 12
fixed: Bitstream Vera Sans Mono 12

Both fonts are installed by default and can be selected in the Sguil client by opening the ‘File’ dropdown menu and choosing ‘Change Font’.