Managed Kubernetes now available in Open Beta. Test out the new service yourself at your Control Panel.
Managed Kubernetes now available in Open Beta. Test out the new service yourself at your Control Panel.
Snort is a popular choice for running a network intrusion detection systems or NIDS. It monitors the package data sent and received through a specific network interface. NIDS can catch threats targeting your system vulnerabilities using signature-based detection and protocol analysis technologies. NIDS software, when installed and configured appropriately, can identify the latest attacks, malware infections, compromised systems, and network policy violations. In this guide, you will find instructions on how to install Snort on CentOS 7. The install guide is also available for cloud servers running Debian 9 and Ubuntu 16.
Snort is one of the most commonly used network-based IDS. It is a lightweight, open source, available on a multitude of platforms, and can be comfortably installed even on the smallest of cloud server instances. Although Snort is capable of much more than just network monitoring, this guide shows how to configure and run Snort in NIDS mode with a basic setup that you can later expand as needed.
Setting up a basic configuration of Snort on CentOS is fairly simple but takes a few steps to complete. You will first need to install all the prerequisite software to ready your cloud server for installing Snort itself. Install the required libraries with the following command.
sudo yum install -y gcc flex bison zlib libpcap pcre libdnet tcpdump
The latest Snort version at this time also requires libnghttp2 which can be downloaded from the Extra Packages for Enterprise Linux (EPEL) and installed using the commands underneath.
sudo yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm sudo yum install -y libnghttp2
With the prerequisites fulfilled, next up is how to install Snort on CentOS 7. Snort can be installed with ready-built packages, which simplifies the setup process considerably, and allows you to install Snort easily with yum. Alternatively, you can download and install the Snort on CentOS manually from the source. Below you will find instructions for both of these methods.
Snort provides convenient rpm packets for CentOS 7, which can be installed simply with the commands below. Snort itself uses something called Data Acquisition library (DAQ) to make abstract calls to packet capture libraries. Check the latest version number on the Snort front page, if a newer version of DAQ or Snort is available simply replace the version number in the following commands with the latest option.
sudo yum install https://www.snort.org/downloads/snort/daq-2.0.6-1.centos7.x86_64.rpm
sudo yum install https://www.snort.org/downloads/snort/snort-2.9.12-1.centos7.x86_64.rpm
And you are done with the installation, jump forward to the configuration to continue.
Setting up Snort on CentOS from the source code consists of a couple of steps: downloading the code, configuring it, compiling the code, installing it to an appropriate directory, and lastly configuring the detection rules.
Before getting started, you will also need the following development packages in addition to the already install prerequisites.
sudo yum install -y zlib-devel libpcap-devel pcre-devel libdnet-devel openssl-devel libnghttp2-devel luajit-devel
When ready, make a temporary download folder to your home directory and then change into it with the command below.
mkdir ~/snort_src && cd ~/snort_src
Download the latest DAQ source package from the Snort website with the wget command underneath. Replace the version number in the command if a newer source available.
wget https://www.snort.org/downloads/snort/daq-2.0.6.tar.gz
The download will only take a few seconds when complete extract the source code and jump into the new directory with the following commands.
tar -xvzf daq-2.0.6.tar.gz cd daq-2.0.6
Run the configuration script using its default values, then compile the program with make and finally install DAQ.
./configure && make && sudo make install
With the DAQ installed you can get started with Snort, change back to the download folder.
cd ~/snort_src
Next, download the Snort source code with wget. Check the latest version number from Snort website and replace it in the following command if necessary.
wget https://www.snort.org/downloads/snort/snort-2.9.12.tar.gz
Once the download is complete, extract the source and change into the new directory with these commands.
tar -xvzf snort-2.9.12.tar.gz cd snort-2.9.12
Then configure the installation with sourcefire enabled, run make and make install.
./configure --enable-sourcefire && make && sudo make install
With that done, continue below on how to set up the configuration files.
Next, you will need to setup Snort for your system. This includes editing some configuration files, downloading the rules that Snort will follow, and taking Snort for a test run.
Start with updating the shared libraries using the command underneath.
sudo ldconfig
Snort on CentOS gets installed to /usr/local/bin/snort directory, it is good practice to create a symbolic link to /usr/sbin/snort.
If you installed Snort with yum you can skip this command.
sudo ln -s /usr/local/bin/snort /usr/sbin/snort
To run Snort on CentOS safely without root access, you should create a new unprivileged user and a new user group for the daemon to run under.
sudo groupadd snort sudo useradd snort -r -s /sbin/nologin -c SNORT_IDS -g snort
Then create the folder structure to house the Snort configuration, just copy over the commands below. If you installed Snort using yum these directories should have already been added at install, but check to make sure.
sudo mkdir -p /etc/snort/rules sudo mkdir /var/log/snort sudo mkdir /usr/local/lib/snort_dynamicrules
Set the permissions for the new directories accordingly.
sudo chmod -R 5775 /etc/snort sudo chmod -R 5775 /var/log/snort sudo chmod -R 5775 /usr/local/lib/snort_dynamicrules sudo chown -R snort:snort /etc/snort sudo chown -R snort:snort /var/log/snort sudo chown -R snort:snort /usr/local/lib/snort_dynamicrules
Create new files for the white and blacklists as well as the local rules.
sudo touch /etc/snort/rules/white_list.rules sudo touch /etc/snort/rules/black_list.rules sudo touch /etc/snort/rules/local.rules
Then if you installed Snort from the source code, copy over the configuration files from the download folder. Skip this if you installed Snort with yum.
sudo cp ~/snort_src/snort-2.9.12/etc/*.conf* /etc/snort sudo cp ~/snort_src/snort-2.9.12/etc/*.map /etc/snort
Next up, you will need to download the detection rules Snort will follow to identify potential threats. Snort provides three tiers of rule sets, community, registered and subscriber rules.
Underneath you can find instructions for downloading both community rules or registered user rule sets.
If you just want to quickly test out Snort, grab the community rules using wget with the command below.
wget https://www.snort.org/rules/community -O ~/community.tar.gz
Extract the rules and copy them to your configuration folder.
sudo tar -xvf ~/community.tar.gz -C ~/
sudo cp ~/community-rules/* /etc/snort/rules
By default, Snort on CentOS expects to find a number of different rule files which are not included in the community rules. Comment out the unnecessary lines using the next command.
sudo sed -i 's/include $RULE_PATH/#include $RULE_PATH/' /etc/snort/snort.conf
You can also take a moment and register on the Snort website. Registering gives you access to use their Oink code to download the registered user rules. You can find the code in the Snort user account details.
Replace the oinkcode in the following command with your personal code.
wget https://www.snort.org/rules/snortrules-snapshot-29120.tar.gz?oinkcode=oinkcode -O ~/registered.tar.gz
Once downloaded, extract the rules and copy them over to your configuration directory.
sudo tar -xvf ~/registered.tar.gz -C /etc/snort
The rule sets for the registered users include an extensive amount of useful preconfigured detection rules. If you tried out Snort with the community rules first, you can enable additional rules by uncommenting their inclusions towards the end of the snort.conf file.
With the configuration and rule files in place, edit the snort.conf to modify a few parameters. Open the configuration file for editing with the following command.
sudo vi /etc/snort/snort.conf
Find these sections shown below in the configuration file and change the parameters to reflect the examples here.
# Setup the network addresses you are protecting
ipvar HOME_NET server_public_ip/32
# Set up the external network addresses. Leave as "any" in most situations ipvar EXTERNAL_NET !$HOME_NET
# Path to your rules files (this can be a relative path) var RULE_PATH /etc/snort/rules var SO_RULE_PATH /etc/snort/so_rules var PREPROC_RULE_PATH /etc/snort/preproc_rules
# Set the absolute path appropriately var WHITE_LIST_PATH /etc/snort/rules var BLACK_LIST_PATH /etc/snort/rules
In the same snort.conf file, scroll down to the section 6 and set the output for unified2 to log under filename of snort.log like below.
# unified2 # Recommended for most installs output unified2: filename snort.log, limit 128
Lastly, scroll down towards the bottom of the file to find the list of included rule sets. You will need to uncomment the local.rules to allow Snort to load any custom rules.
include $RULE_PATH/local.rules
If you are using the community rules, add the line underneath to your ruleset as well, for example just below your local.rules line.
include $RULE_PATH/community.rules
Once you are done with the configuration file, save the changes and exit the editor.
Your Snort should now be ready to run. Test the configuration using the parameter -T to enable test mode and validate the configuration.
sudo snort -T -c /etc/snort/snort.conf
If you get an error while loading shared libdnet.1 libraries, create the following link and try again.
ln -s /usr/lib64/libdnet.so.1.0.1 /usr/lib64/libdnet.1
After running the Snort configuration test, you should get a message like this example below.
--== Initialization Complete ==-- ,,_ -*> Snort! <*- o" )~ Version 2.9.12 GRE (Build 325) '''' By Martin Roesch & The Snort Team: http://www.snort.org/contact#team Copyright (C) 2014-2018 Cisco and/or its affiliates. All rights reserved. Copyright (C) 1998-2013 Sourcefire, Inc., et al. Using libpcap version 1.5.3 Using PCRE version: 8.32 2012-11-30 Using ZLIB version: 1.2.7 Rules Engine: SF_SNORT_DETECTION_ENGINE Version 3.0 Preprocessor Object: appid Version 1.1 Preprocessor Object: SF_DNP3 Version 1.1 Preprocessor Object: SF_MODBUS Version 1.1 Preprocessor Object: SF_GTP Version 1.1 Preprocessor Object: SF_REPUTATION Version 1.1 Preprocessor Object: SF_SIP Version 1.1 Preprocessor Object: SF_SDF Version 1.1 Preprocessor Object: SF_DCERPC2 Version 1.0 Preprocessor Object: SF_SSLPP Version 1.1 Preprocessor Object: SF_DNS Version 1.1 Preprocessor Object: SF_SSH Version 1.1 Preprocessor Object: SF_SMTP Version 1.1 Preprocessor Object: SF_IMAP Version 1.0 Preprocessor Object: SF_POP Version 1.0 Preprocessor Object: SF_FTPTELNET Version 1.2 Snort successfully validated the configuration! Snort exiting
In case you get an error, the print out should tell you what the problem was and where to fix it. Most likely problems are missing files or folders, which you can usually resolve by either adding any you might have missed in the setup above, or by commenting out unnecessary inclusion lines in the snort.conf file. Check the configuration part and try again.
To test if Snort is logging alerts as intended, add a custom detection rule alert on incoming ICMP connections to the local.rules file. Open your local rules in a text editor.
sudo vi /etc/snort/rules/local.rules
Then add the following line to the file.
alert icmp any any -> $HOME_NET any (msg:"ICMP test"; sid:10000001; rev:001;)
The rule consists of the following parts:
Save the local.rules and exit the editor. You then need to restart Snort since you made changes to the files it loads.
Start Snort with -A console options to print the alerts to stdout. You will need to select the correct network interface with the public IP address of your server, for example, eth0.
sudo snort -A console -i eth0 -u snort -g snort -c /etc/snort/snort.conf
If you are not sure which interface to use, check your UpCloud control panel for the public IPv4 address of your server in the Network settings. You can also use the following command on your server.
ip addr
The output will list all of your currently configured network interfaces. Find the one with the same public IP address as shown in the Network settings, commonly eth0.
With Snort up and running ping your cloud server from any other computer. You should see a notice for each ICMP call in the terminal running Snort.
07/12-11:20:33.501624 [**] [1:10000001:1] ICMP test [**] [Priority: 0] {ICMP} 83.136.252.118 -> 80.69.173.202
After the alerts show up you can stop Snort with ctrl+C.
Snort records the alerts to a log under /var/log/snort/snort.log.timestamp, where the time stamp is the point in time when Snort was started marked in Unix time. You can read the logs with the command underneath. Since you have only run Snort once, there is only one log, complete your command by pressing TAB.
snort -r /var/log/snort/snort.log.
The log shows a warning for each ICMP call with source and destination IPs, time and date, plus some additional info as shown in the example below.
WARNING: No preprocessors configured for policy 0. 07/12-11:20:33.501624 83.136.252.118 -> 80.69.173.202 ICMP TTL:63 TOS:0x0 ID:20187 IpLen:20 DgmLen:84 DF Type:8 Code:0 ID:13891 Seq:1 ECHO
Lastly, if you wish to run Snort on CentOS as a service in the background you should download a startup script from Snort documentation.
If you installed Snort using yum, you should already have the startup script configured. Start the service as described below.
Use the following commands to get and install a startup script for your system.
wget https://www.snort.org/documents/snort-startup-script-for-centos -O ~/snortd sudo chmod 755 ~/snortd && sudo mv ~/snortd /etc/init.d/
Next, reload the system daemon.
sudo systemctl daemon-reload
Then start the service.
sudo systemctl start snortd
The startup script also includes the other usual systemctl commands: stop, restart, and status. For example, you can check the status of the service with the following command.
sudo systemctl status snortd
Congratulations, you should have now successfully configured and tested a network-based intrusion detection system. This guide however only covers the very basics with an introduction to Snort and NIDS in general. To get more out of your installation, check out the deployment guides over at the Snort documents page, or jump right into writing your own detection rules with their helpful Snort rules info graph.
Michael
Libnet is now version 1.7.0 and apparently can only be directly downloaded from https://rpmfind.net/linux/rpm2html/search.php?query=libnet.so.1()(64bit)/lib64net1-1.1.6-8.mga7.aarch64.rpm
Ryan
I tried using the snort background script “snortd”. Followed the instructions but got an exceeded resources error and the service won’t start. Snort itself works if I manually start it. Running Centos7. Since I am running it in a VM I know the network interface is named differently and I changed all references in the snortd.service that pointed to eth0 to enp0s3 (vm adapter), still no luck. Any suggestions on what I can look for?
FilipeM
Awesome intro to Snort. That would be cool to have a follow up article to built something similar to what those products such as Fingbox, Firewalla, etc… but with Snort. It does not need to have a fancy UI, just an automated way for example:
1) if a new device appears on your network, you get aa notification
2) all new devices are blocked by default, (blacklisted), then you can manually whitelist them
3) notifications would come as emails – any alert
stuff like that. That would be very cool – I could not find anything on that…
Christian
Hi, I have the same problem.
This is my output.
snortd.service – LSB: Start up the Snort Intrusion Detection System daemon
Loaded: loaded (/etc/rc.d/init.d/snortd; bad; vendor preset: disabled)
Active: failed (Result: resources) since mar 2019-05-21 11:35:35 EDT; 17s ago
Docs: man:systemd-sysv-generator(8)
Process: 14781 ExecStart=/etc/rc.d/init.d/snortd start (code=exited, status=0/SUCCESS)
may 21 11:35:35 localhost.localdomain snortd[14781]: Daemon parent exiting (0)
may 21 11:35:35 localhost.localdomain snortd[14781]: [17B blob data]
may 21 11:35:35 localhost.localdomain snort[14797]: Daemon initialized, signaled parent pid: 14792
may 21 11:35:35 localhost.localdomain snort[14797]: Reload thread starting…
may 21 11:35:35 localhost.localdomain snort[14797]: Reload thread started, thread 0x7fd2a7235700 (14798)
may 21 11:35:35 localhost.localdomain systemd[1]: PID file /var/run/snort_eth0.pid not readable (yet?) after start.
may 21 11:35:35 localhost.localdomain systemd[1]: snortd.service never wrote its PID file. Failing.
may 21 11:35:35 localhost.localdomain systemd[1]: Failed to start LSB: Start up the Snort Intrusion Detection System daemon.
may 21 11:35:35 localhost.localdomain systemd[1]: Unit snortd.service entered failed state.
may 21 11:35:35 localhost.localdomain systemd[1]: snortd.service failed.
[[email protected] system]#
I followed the guide stop by step. My interface is eth0
houda
Whats wrong ?
Running in Test mode
–== Initializing Snort ==–
Initializing Output Plugins!
Initializing Preprocessors!
Initializing Plug-ins!
Parsing Rules file “/root/community-rules/snort.conf”
PortVar ‘HTTP_PORTS’ defined : [ 36 80:90 311 383 555 591 593 631 801 808 818 901 972 1158 1220 1414 1533 1741 1830 1942 2231 2301 2381 2578 2809 2980 3029 3037 3057 3128 3443 3702 4000 4343 4848 5000 5117 5250 5450 5600 5814 6080 6173 6988 7000:7001 7005 7071 7144:7145 7510 7770 7777:7779 8000:8001 8008 8014:8015 8020 8028 8040 8080:8082 8085 8088 8090 8118 8123 8180:8182 8222 8243 8280 8300 8333 8344 8400 8443 8500 8509 8787 8800 8888 8899 8983 9000 9002 9060 9080 9090:9091 9111 9290 9443 9447 9710 9788 9999:10000 11371 12601 13014 15489 19980 29991 33300 34412 34443:34444 40007 41080 44449 50000 50002 51423 53331 55252 55555 56712 ]
PortVar ‘SHELLCODE_PORTS’ defined : [ 0:79 81:65535 ]
PortVar ‘ORACLE_PORTS’ defined : [ 1024:65535 ]
PortVar ‘SSH_PORTS’ defined : [ 22 ]
PortVar ‘FTP_PORTS’ defined : [ 21 2100 3535 ]
PortVar ‘SIP_PORTS’ defined : [ 5060:5061 5600 ]
PortVar ‘FILE_DATA_PORTS’ defined : [ 36 80:90 110 143 311 383 555 591 593 631 801 808 818 901 972 1158 1220 1414 1533 1741 1830 1942 2231 2301 2381 2578 2809 2980 3029 3037 3057 3128 3443 3702 4000 4343 4848 5000 5117 5250 5450 5600 5814 6080 6173 6988 7000:7001 7005 7071 7144:7145 7510 7770 7777:7779 8000:8001 8008 8014:8015 8020 8028 8040 8080:8082 8085 8088 8090 8118 8123 8180:8182 8222 8243 8280 8300 8333 8344 8400 8443 8500 8509 8787 8800 8888 8899 8983 9000 9002 9060 9080 9090:9091 9111 9290 9443 9447 9710 9788 9999:10000 11371 12601 13014 15489 19980 29991 33300 34412 34443:34444 40007 41080 44449 50000 50002 51423 53331 55252 55555 56712 ]
PortVar ‘GTP_PORTS’ defined : [ 2123 2152 3386 ]
Detection:
Search-Method = AC-Full-Q
Split Any/Any group = enabled
Search-Method-Optimizations = enabled
Maximum pattern length = 20
ERROR: /root/community-rules/classification.config(0) Unable to open rules file “/root/community-rules/classification.config”: No such file or directory.
Fatal Error, Quitting..
Narendra
hi
i need steps to install in RHEL linux
koxega
Hi , Snort gets me this error saying daq static library not found
./configure: line 16264 daq-modules-config: command not found
checking for daq_load_modules in idaq_static… no
Error! daq_static_library not found , go get it from snort.com
What could be the problem ?
jo
To save you the deep digging. If you are running selinux, follow that link to start snort in background or at all.
https://seclists.org/snort/2018/q4/338
Ryan
Hello, I am getting a fatal error permission denied. I checked permissions and everything is correct.
snortd.service – SYSV: snort is a lightweight network intrusion detection tool that currently detects more than 1100 host and network vulnerabilities, portscans, backdoors, and more.
Loaded: loaded (/etc/rc.d/init.d/snortd; generated)
Active: active (exited) since Sun 2019-09-08 23:24:48 UTC; 9min ago
Docs: man:systemd-sysv-generator(8)
Process: 21917 ExecStop=/etc/rc.d/init.d/snortd stop (code=exited, status=0/SUCCESS)
Process: 21932 ExecStart=/etc/rc.d/init.d/snortd start (code=exited, status=0/SUCCESS)
Sep 08 23:24:48 ip-172-31-14-159.us-east-2.compute.internal snort[21943]: Running in IDS mode
Sep 08 23:24:48 ip-172-31-14-159.us-east-2.compute.internal snort[21943]:
Sep 08 23:24:48 ip-172-31-14-159.us-east-2.compute.internal snort[21943]: –== Initializing Snort ==–
Sep 08 23:24:48 ip-172-31-14-159.us-east-2.compute.internal snort[21943]: Initializing Output Plugins!
Sep 08 23:24:48 ip-172-31-14-159.us-east-2.compute.internal snort[21943]: Initializing Preprocessors!
Sep 08 23:24:48 ip-172-31-14-159.us-east-2.compute.internal snort[21943]: Initializing Plug-ins!
Sep 08 23:24:48 ip-172-31-14-159.us-east-2.compute.internal snort[21943]: Parsing Rules file “/etc/snort/snort.conf”
Sep 08 23:24:48 ip-172-31-14-159.us-east-2.compute.internal snort[21943]: FATAL ERROR: /etc/snort/snort.conf(0) Unable to open rules file “/etc/snort/snort.conf”: Permission denied.
Sep 08 23:24:48 ip-172-31-14-159.us-east-2.compute.internal snortd[21932]: [29B blob data]
Sep 08 23:24:48 ip-172-31-14-159.us-east-2.compute.internal systemd[1]: Started SYSV: snort is a lightweight network intrusion detection tool that currently detects more than 1100 host and network vulnerabilities, p>
tamil
Can’t initialize DAQ afpacket (-1) – afpacket_daq_initialize: Invalid interface specification: ”!
i am getting the error in snort installtion
run this command means
[[email protected] daq-2.0.6]# sudo snort -T -c /etc/snort/snort.conf
Rule application order: pass->drop->sdrop->reject->alert->log
Verifying Preprocessor Configurations!
[ Port Based Pattern Matching Memory ]
[ Number of patterns truncated to 20 bytes: 0 ]
afpacket DAQ configured to inline.
ERROR: Can’t initialize DAQ afpacket (-1) – afpacket_daq_initialize: Invalid interface specification: ”!
Fatal Error, Quitting..
Tamil
Hii all i want some custom rules any body give example
Queenie
Hi, thank you for making this very detail! I would like to try snort inline mode with my centos 7, unfortunately it doesn’t work well. Is it possible that you can give me some help? Such as how to set up inline mode.
I have follow the steps from this link already.
http://brianshowto.com/?p=78
Patricio
Excellent documento, thank you!
Ravinno
I’m going nuts.. have tried and re tried this many times on a VM with Centos 7, always getting this error:
+++++++++++++++++++++++++++++++++++++++++++++++++++
Initializing rule chains…
ERROR: /etc/snort/rules/app-detect.rules(33) Unknown ClassType: web-application-attack
Fatal Error, Quitting..
Please help.. I beg help!!! not even google has an explanation for this :/
Ravinno
Nevermind I see now it’s because I did not have a classification file, I guess it would have been very nice if who wrote this guy added that in the tutorial!!
Claudiu
Hello,
Can someone help me to solve the following issue.
I have installed Snort Version 2.9.15.1 GRE (Build 15125) on Centos 7.
when I run it on the interface which has all the network traffic sniffed I got this message in every alert: WARNING: No preprocessors configured for policy 0
WARNING: No preprocessors configured for policy 0.
02/20-09:50:33.478603 10.xx.xx.xx -> 10.xx.xx.xx
ICMP TTL:253 TOS:0x0 ID:0 IpLen:20 DgmLen:56
Type:11 Code:0 TTL EXCEEDED IN TRANSIT
** ORIGINAL DATAGRAM DUMP:
10.xx.xx.xx -> 10.xx.xx.xx
ICMP TTL:1 TOS:0x0 ID:50625 IpLen:20 DgmLen:64
Type: 8 Code: 0 Csum: 21084 Id: 40215 SeqNo: 32403
** END OF DUMP
Can someone help me to solve this problem?
Sheng
I am getting this error. Any idea?
# snort -r /var/log/snort/snort.log.1583254619
Running in packet dump mode
–== Initializing Snort ==–
Initializing Output Plugins!
pcap DAQ configured to read-file.
ERROR: Can’t initialize DAQ pcap (-1) – unknown file format
Fatal Error, Quitting..
Suryalakshminarayana Dhulipudi
Hi I am getting below issue while installing snort, it used to work before on the same os.
[[email protected] ~]$ sudo yum install https://www.snort.org/downloads/snort/snort-2.9.16.1-1.centos8.x86_64.rpm
Loaded plugins: fastestmirror
Cannot open: https://www.snort.org/downloads/snort/snort-2.9.16.1-1.centos8.x86_64.rpm. Skipping.
Error: Nothing to do
Isyam
Hi,
Someone can help me? I am still new with Snort.
I following all step mention above. But Snort Rules not read.
Below is the outcome.
+++++++++++++++++++++++++++++++++++++++++++++++++++
Initializing rule chains…
0 Snort rules read
0 detection rules
0 decoder rules
0 preprocessor rules
0 Option Chains linked into 0 Chain Headers
+++++++++++++++++++++++++++++++++++++++++++++++++++
+——————-[Rule Port Counts]—————————————
| tcp udp icmp ip
| src 0 0 0 0
| dst 0 0 0 0
| any 0 0 0 0
| nc 0 0 0 0
| s+d 0 0 0 0
+—————————————————————————-
hocine
ERROR size 1432 != 1464
ERROR: Failed to initialize dynamic preprocessor: SF_REPUTATION version 1.1.1 (-2)
Fatal Error, Quitting..
would you help me please
Rudy
hi, went back and checked everything but i know i missed something.
i am getting “sudo: snort: command not found” error when i try and verify.
ran that as root user and still get the same error. what am i missing?
mian
ERROR! Libpcap library/headers (libpcap.a (or .so)/pcap.h)
not found, go get it from http://www.tcpdump.org
or use the –with-libpcap-* options, if you have it installed
in unusual place. Also check if your libpcap depends on another
shared library that may be installed in an unusual place
can someone help me please
Ronaldo
Hello! Can i use this tutorial for CentOS 8? Thanks before!
Ameen
I followed the same steps, but did not get any test alert:-
I am pinging from another machine and it is successful.
Note: the interface is IPv6.
All machines are centos-7
The below results is all I got and it stucks like this till I hit ctl+c
Preprocessor Object: SF_SIP Version 1.1
Preprocessor Object: SF_SDF Version 1.1
Preprocessor Object: SF_S7COMMPLUS Version 1.0
Preprocessor Object: SF_REPUTATION Version 1.1
Preprocessor Object: SF_POP Version 1.0
Preprocessor Object: SF_SSLPP Version 1.1
Preprocessor Object: SF_MODBUS Version 1.1
Preprocessor Object: SF_IMAP Version 1.0
Preprocessor Object: SF_GTP Version 1.1
Preprocessor Object: SF_SSH Version 1.1
Preprocessor Object: SF_FTPTELNET Version 1.2
Preprocessor Object: SF_DNS Version 1.1
Preprocessor Object: SF_DNP3 Version 1.1
Preprocessor Object: SF_DCERPC2 Version 1.0
Commencing packet processing (pid=1854)
Dmitriy
‘-=SystemD script for Snort=-
===========================
#nano /lib/systemd/system/snort.service
[Unit]
Description=Snort NIDS Daemon
After=syslog.target network.target
[Service]
Type=simple
ExecStart=/usr/sbin/snort -q -u snort -g snort -c /etc/snort/snort.conf -i ens1
[Install]
WantedBy=multi-user.target
_________________________
#systemctl daemon-reload
&&
#systemctl start snort