Open vSwitch (OVS) is a multilayer (MLS) virtual switch licensed under the open-source Apache 2.0 license which is widely used in the field of virtual networking. With this open-source MLS switch, we can easily extend GNS3 switching capabilities. We can add this switch to GNS3 very quickly using a GNS3 OVS appliance. No base Linux system VM is required, no ISO images.
In this post I’m going to describe how to add and run OVS MLS inside of the GNS3 (local or remote).
Author: Tomas Misutka
This article provides a how-to guide on how to add/join a Linux-based system (server, workstation) to a Windows domain working with Active Directory.
The Juniper vSRX firewall can be operated and configured as a router. The reasons may be various, the use in GNS3 may include that vSRX has a smaller memory footprint or non-separated data and control plane. So. to do this, you must :
set system host-name ABC set system root-authentication plain-text-password PASSWORD
And then change the packet processing mode from flow-based to packet-based:
Create a simple MPLS network and observe partial parts of MPLS functionality. MPLS network consist of four routers, two edge routers - LSE1 and LSE2 whose fastEthernet interfaces are not parts of the MPLS network and two Label Switch Routers - LSR1 and LSR2 interconnected through serial lines.
Four routers are connected in a chain line topology:
This article is outdated, see the newer installation guides below.
Akime (former Moloch) Installatioon
Integrating Moloch and Suricata
Elasticsearch is an open source tool, with its primary purpose being the fast and effective fulltext browsing of its indexed data. It is mostly used to browse document databases.
Download the Elasticsearch version currently supported by Moloch:
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.5.1.deb
Unpack and install the archive:
sudo dpkg -i elasticsearch-5.5.1.deb
Suricata is a very fast, robust and continually developed free open source detection tool. It is capable of detecting access violations in real time, providing intrusion prevention, monitoring network safety and offline PCAP file processing.
Set the variable containing the installed version number.
VER=4.0.1
Download and unpack the installation package.
wget http://www.openinfosecfoundation.org/download/suricata-$VER.tar.gz
tar -xvzf "suricata-$VER.tar.gz"
Installation and configuration
./configure --enable-nfqueue --prefix=/usr --sysconfdir=/etc --localstatedir=/var
./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var
Now you can choose one of the following options:
./configure && make && make install-conf
./configure && make && make install-rules
./configure && make && make install-full
cat >> /usr/local/etc/suricata/suricata.yaml <<EOF
stats:
enabled: no
outputs:
- fast:
enabled: no
- eve-log:
enabled: yes
filename: eve.json
types:
- alert:
tagged-packets: no
xff:
enabled: no
af-packet:
- interface: enp7s0f0
cluster-id: 98
cluster-type: cluster_flow
defrag: yes
default-rule-path: /usr/local/etc/suricata/rules
sensor-name: moloch-singlehost
EOF
GeoLite is a free geolocation database. It contains a database of allocated IP addresses listed with country of allocation along, in some cases, with organization to which the given address has been allocated and/or IP block size. The IP address database is regularly updated on the first Tuesday of every month.
Download archives and unpack the database
echo "$(date) installing GeoLite2"
[[ -f 'GeoLite2-City.mmdb.gz' ]] || wget -q -4 http://geolite.maxmind.com/download/geoip/database/GeoLite2-City.mmdb.gz
mkdir -p /usr/local/share/GeoIP
gunzip GeoLite2-City.mmdb.gz --stdout > /usr/local/share/GeoIP/GeoLite2-City.mmdb
EveBox is a web based UI management tool for alerts and events generated by the Suricata network threat detection engine. EveBox works closely with Elasticsearch, with its secondary role being the integration of Suricata logs with Elasticsearch.
Download the latest EveBox installation package.
wget -q -4 https://evebox.org/files/development/evebox-latest-amd64.deb
Unpack and install the archive
dpkg -i evebox-latest-amd64.deb
Set up the ELASTICSEARCH_INDEX and SURICATA_EVE variables, and an URL for Elasticsearch Access.
After calling ELASTICSEARCH_INDEX, the data is indexed from Suricata to Elasticsearch under index names found in Suricata. The SURICATA_EVE variable contains the absolute path to Suricata alerts and events source file.
cat >/usr/local/etc/default/evebox <<EOF
ELASTICSEARCH_URL="-e http://localhost:9200"
ELASTICSEARCH_INDEX="--index suricata"
SURICATA_EVE="--end /var/log/suricata/eve.json"
EOF
Creation of this file allows EveBox server launch without the need to define additional files and options every time.
cat > /lib/systemd/system/evebox.service <<EOF
[Unit]
Description=EveBox Server
[Service]
ExecStart=/usr/bin/evebox \$ELASTICSEARCH_URL \$ELASTICSEARCH_INDEX \$CONFIG \$EVEBOX_OPTS
EnvironmentFile=-/usr/local/etc/default/evebox
[Install]
WantedBy=multi-user.target
EOF
With intention similar to the one in previous step, create this file for launching of an EveBox process which imports alerts from Suricata logs.
cat > /lib/systemd/system/evebox-esimport.service <<EOF
[Unit]
Description=EveBox-EsImport
[Service]
ExecStart=/usr/bin/evebox esimport \$ELASTICSEARCH_URL \$ELASTICSEARCH_INDEX \$SURICATA_EVE
EnvironmentFile/usr/local/etc/default/evebox
[Install]
WantedBy=multi-user.target
EOF
Enable the services configured in previous steps.
systemctl enable evebox-esimport
systemctl enable evebox
Use the following commands to start/restart/stop or print status of the given service.
systemctl start|restart|stop|status evebox-esimport
systemctl start|restart|stop|status evebox
After any changes made in service configuration file, daemon reloading and enabling of the service is needed.
systemctl daemon-reload
systemctl enable ....
Add apt repository and install JAVA.
add-apt-repository ppa:webupd8team/java
apt-get update
apt-get -y install oracle-java8-installer
Install packages necessary for running Moloch.
apt-get install wget curl libpcre3-dev uuid-dev libmagic-dev pkg-config g++ flex bison zlib1g-dev libffi-dev gettext libgeoip-dev make libjson-perl libbz2-dev libwww-perl libpng-dev xz-utils libffi-dev
Download Moloch installation package for Ubuntu 16.04.
wget https://files.molo.ch/builds/ubuntu-16.04/moloch_0.20.1-1_amd64.deb
Unpack and install the package
dpkg -i moloch_0.20.1-1_amd64.deb
Run Moloch configuration, since you have already installed Elasticsearch, do not allow Elasticsearch Demo installation.
sudo ./data/moloch/bin/Configure
Continue the installation by running Elasticsearch and initializing the database.
systemctl start elasticsearch.service
/data/moloch/db/db.pl http://127.0.0.1:9200 init
/data/moloch/db/db.pl http://127.0.0.1:9200 upgrade
Add user to web GUI.
/data/moloch/bin/moloch_add_user.sh admin user password –admin
Create the configuration file of wiseService components and set parameters of both the service itself and of Suricata (EveBox access IP address, fields displayed in Moloch, etc.)
cd /data/moloch/etc/
cp /data/moloch/wiseService/wiseService.ini.sample /data/moloch/etcwise.ini
cat > /data/moloch/etc/wise.ini <<EOF
[wiseService]
port=8081
[suricata]
evBox=http://127.0.0.1:5636
fields=severity;category;signature;flow_id;_id
mustHaveTags=escalated
mustNotHaveTags=archived
EOF
Create a symlink in wiseService folder referencing the configuration file created in the previous step.
cd /data/moloch/wiseService/
ln -s /data/moloch/etc/wise.ini wiseService.ini
Always run from wiseService directory
node /data/moloch/bin/node wiseService.js -c wiseService.ini
Download and unpack the archive, choose the version supported by the installed Elasticsearch version.
wget https://artifacts.elastic.co/downloads/kibana/kibana-5.5.3-amd64.deb
dpkg -i kibana-5.5.3-amd64.deb
Start the service
service kibana start
service kibana status
Location of the configuration file
cat /etc/kibana/kibana.yml
To gain web access, you need to enable communication on the port number of Kibana. The standard port is 5601.
iptables -A INPUT -m udp -p udp --dport 5601 -j ACCEPT
iptables -A INPUT -m tcp -p tcp --dport 5601 -j ACCEPT
To access Elaticsearch you can use services provided by Kibana. First, you need to set the values of indices to be searched. Set index pattern to “session-” for Moloch and “suricata-” for Suricata, these settings can be found in the Management menu item.
CDMCS Cyber Defence Monitoring Course Suite
Installation of Moloch is no trivial matter, that is why we have prepared this guide on how to set up the system in cloud environment.
Before installing Moloch itself, you need to install the Elasticsearch database and make the following changes in configuration of the operating system.
Add Java repository
sudo add-apt-repository ppa:webupd8team/java Perform an update of the list of packages and packages themselves to the latest versions
sudo apt-get update -y && sudo apt-get upgrade -yDownload and install the public GPG signing key
wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -Add Elastic Repository
echo "deb https://artifacts.elastic.co/packages/5.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-5.x.listPerform another package update
sudo apt-get update -y && sudo apt-get upgrade -y && sudo apt-get dist-upgrade -y Clean-up (Optional)
sudo apt-get autoremoveDisable swap
sudo swapoff -a
sudo nano /etc/fstabEdit fstab – comment out the following:
#/dev/mapper/logs--vg-swap_1 none swap sw 0 0or
#/dev/mapper/user--vg-swap_1 none swap sw 0 0
Install Java 8
sudo apt-get install oracle-java8-installerInstall Elasticsearch
sudo apt-get install elasticsearchInstall additional necessary packages
sudo apt-get install wget curl libpcre3-dev uuid-dev libmagic-dev pkg-config g++ flex bison zlib1g-dev libffi-dev gettext libgeoip-dev make libjson-perl libbz2-dev libwww-perl libpng-dev xz-utils libffi-devDownload the newest version of Moloch/Arkime (Arkime downloads)
wget https://files.molo.ch/builds/ubuntu-16.04/moloch_1.7.0-1_amd64.debInstall Moloch
Note: when asked whether or not to install Elasticsearch choose no, since you have already installed Elasticsearch earlier and this script offers only the demo version.
sudo dpkg -i moloch_1.7.0-1_amd64.debInstall dependencies (If the previous step halts due to errors)
sudo apt-get -f installStart Elasticsearch on startup
sudo systemctl enable elasticsearch.serviceConfigure Elasticsearch (OPTIONAL) (Configure as needed [max RAM allocation is 32GB])
It is recommended Elasticsearch be installed on a separate machine
sudo nano /etc/elasticsearch/jvm.optionsStart Elasticsearch
sudo systemctl start elasticsearch.serviceCheck Elasticsearch Status
sudo systemctl status elasticsearch.serviceTo configure Moloch, you can either download a configuration file from https://github.com/aol/moloch/wiki/Settings or you can configure Moloch yourself using the following two commands
Before configuring Moloch manually, delete the config.ini file from /data/moloch/etc/
sudo rm /data/moloch/etc/config.ini Configure Moloch as needed
sudo /data/moloch/bin/ConfigureInitialize Elasticsearch Database
sudo /data/moloch/db/db.pl http://localhost:9200 initInstall and update npm
sudo apt install npm
npm updateAdd Moloch User
sudo /data/moloch/bin/moloch_add_user.sh admin admin PASSWORDGOESHERE --adminStart Moloch Capture Service
sudo systemctl start molochcapture.serviceCheck Moloch Capture Service status
sudo systemctl status molochcapture.serviceStart Moloch Viewer Service
sudo systemctl start molochviewer.serviceCheck Moloch Viewer Service status
sudo systemctl status molochviewer.serviceProvided you have done everything right so far, you should be able to access the web interface at http://IPADDRESSOFINTERFACE:8005
We are using GNS3 remote server deployment, where sometimes (typically at a higher CPU load) GSN3 opens some project as very zoomed out. And, GNS3 zoom does not react at all (problem with zoom-in / zoom-out).
Solution => go to the Main menu, select View and then Zoom Reset (Ctrd +D).
Sometimes you may need to provide PCAP files to third-party organizations or perhaps, in our case, publish a network traffic dataset. In order to not reveal your network infrastructure and/or other sensitive data, you must anonymize these files before sharing them with anyone outside of you organization.
We use TraceWrangler for network data anonymization on OSI Layers 2 through 4. TraceWrangler is very easy to use and has an intuitive GUI:
TraceWrangler, however, isn’t perfect. First of all, the maximum size of a file that TraceWrangler can open is 2 GB. Since a typical network traffic dataset usually consists of PCAP/pcapng files that are several gigabytes in size, you will need to split the files in question into smaller, more digestible chunks.
To split up PCAP files we use Wireshark’s editcap feature. Since editcap lacks a GUI, we need to use Windows Command Prompt interface.
First, we need to change directory to Wireshark’s installation directory where editcap is located, by default it is C:Program FilesWireshark:
cd "C:Program FilesWireshark"A typical Windows command to split a file using editcap looks something like this:
editcap -c 300000 "C:datasetsdataset.pcap" "C:datasetsanondataset-split-.pcap"The option -c 300000 defines the maximum amount of packets in a single output file. “C:datasetsdataset.pcap” is the path to input file and “C:datasetsanondataset-split-.pcap” contains the path and the name template of the output files.
Since TraceWrangler is still in beta and therefore has some bugs, like random errors that occur during anonymization of files larger that 50 MB, we recommend to set the maximum amount of packets for editcap output files to a value that would produce files well under 2GB, possibly even under 50 MB.
After you open the files you are about to anonymize in TraceWrangler, click “anonymize files” to open the anonymization options menu. Before you begin, make sure to clear all default anonymization settings first, otherwise you will end up with heavily truncated files:
If you want to anonymize a large amount of IP addresses, it would be illogical to replace each one with a manually entered address. For this purpose you can check “Replace IP addresses by subnet” and pick “keep host part” from the list of options. Check “Recalculate CRC” and pick “Keep bad checksums bad” if needed.
Finally, in the Output settings you can pick the directory to which you want to save the files. If you set filename to < filename>_anonymized, the resulting file’s name will be the original file’s name with the string _anonymized appended. Confirm the setting by clicking “Okay” and click “Run” to start anonymization.
To merge the PCAP files into one, we use another feature of Wireshark: mergecap. Wireshark also provides file merging through GUI, however this is supported for two files at a time only. In our case, this would be very time consuming, therefore, we have used command line interface:
mergecap.exe -w "C:datasetsdataset.pcap" "C:datasetsdataset-split01-anonymized.pcap" "C:datasetsdataset-split02-anonymized.pcap" "C:datasetsdataset-split03-anonymized.pcap" "C:datasetsdataset-split04-anonymized.pcap" "C:datasetsdataset-split05-anonymized.pcap" "C:datasetsdataset-split06-anonymized.pcap" "C:datasetsdataset-split07-anonymized.pcap" "C:datasetsdataset-split08-anonymized.pcap" "C:datasetsdataset-split09-anonymized.pcap" "C:datasetsdataset-split10-anonymized.pcap" "C:datasetsdataset-split11-anonymized.pcap"The -w option specifies the output file and all of the other paths specify the files to be merged. Files are merged chronologically according to their timestamps.
TraceWrangler, is only capable of anonymizing OSI layers 2 through 4 and thus cannot sanitize URIs, e.g. http://192.168.4.2/index.php. To sanitize URIs, we use hex editor HxD. Unlike TraceWrangler, HxD is capable of modifying files of any size, located both on disk and RAM alike.
Theoretically, you could use HxD to anonymize all layers without the need to use TraceWrangler. This would, however, result in incorrect checksums in all of the headers.
To anonymize L2 through L4 data, you can use search and replace using Hex values:
Be careful, though, the above example will replace the first two octets in the network 192.168.0.0/16 with 172.16., but will also replace any two consecutive octets 192 and 168 in other addresses as well, e.g. 10.0.192.168 becomes 10.0.172.16. The more specific you are, the lower the risk of unwanted replacement: if you want to replace 192.168.1.1 with 192.0.0.1, be sure to replace 192.168.1. with 192.0.0., not just the latter two octets.
Things are much easier on L7, here you can be much more specific with your replacements using text string replacing:
Depending on whether you are editing the file in your RAM or on you disk, changes to the file may not be permanent,always save your work after you’re done:
Our ISP provider (SANET) offers an IPTV service, where the list of TV/radio programs is offered using SAP multicast at IPv4 address of 233.10.47.10. However, my PC (with Win 10 OS installed) stopped receiving the SAP announcements, and the playlist was just empty. All works fine but once it stopped. Even better, it works for some of my colleagues, but not for others
My PC runs dual-stack, i.e. my network works with IPv4/IPv6. My PC has several network adapters as I’m running some virtualization software.
When others can hear you silently, you can boost microphone volume level. We have to mention, that this option is not available on every microphone, for example on some USB microphones.
Right click on volume down on tray -> Sounds -> tab Recording -> right click on Microphone -> Properties -> tab Levels