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Questions tagged [snort]

Snort is an open source intrusion prevention system which capable of real-time traffic analysis and packet logging.

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SNORT Conf File MACOS

I installed SNORT using brew install snort . However, there is no configuration file installed (snort.conf). Is this normal? How do I manage rules then? Also, when I run SNORT, there is the error ...
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Snort causing DHCP ACK spam in VirtualBox internal network

I have an internal network (10.10.0.0/24) in VirtualBox which has been configured with a DHCP server using VBoxManage. There are 3 VMs on the network, Ubuntu 16 (10.10.0.2 & 10.10.0.5), Ubuntu 18 (...
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Snort IPS Inline mode not all blocking traffic

I did configure Snort to work as an IPS Inline mode. I have set a rule to drop the ICMP traffic using the following rulemphasized texte: reject icmp any any <> any $HTTP_PORT ( msg:"ICMP"; sid:...
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Is there a possibility for snort to detect port scans and to log them via a standard output format?

I know about the sfportscan preprocessor module, but the output format is really unconvinient for me. Is there a way I can make sfportscan work with a standard output format and with the syslog output ...
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140 views

Snort error: Unknown rule option: 'established'

I'm trying to configure snort so that I'll get mail notifications when snort suspects there is an attack ongoing. I'm following this guide and under "Prioritizing with classification.config" it says ...
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1answer
160 views

Decrypt HTTPS traffic for IDS and encrypt it and send it again

so I have this architecture in VirtualBox : Client <--> IDS <--> server where all of the machines are implemented in Kali Linux and I am currently hosting a website on the Server which is ...
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1answer
234 views

Using Gateway's Link-Local v6 Address for LAN Client's IPv6 Gateway Setting… What Is The Source IP For Packets From Clients As Seen By The Gateway?

I'm still wrapping my head around the finer points of IPv6. It just hasn't been a priority to mess with it much and I didn't have the personal interest until my latest little project. However, one ...
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2answers
847 views

Snort 2.9.13 Error: Cant start DAQ (-1) --> Fatal Error quiting

I have installed Snort 2.9.13 on Windows 10. When I try to check the interfaces with Snort -W, it doesn't show any. However, using Windows' ipconfig they are visible. When I test Snort using snort -i ...
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1k views

Snort installed but no pre-processors configured for policy 0

Hi I have installed snort 2.9.11.1 using home-brew for Mac however I received a warning that there are no pre-processors configured for policy 0. How should I continue to configure my install for ...
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1answer
345 views

Manjaro Linux snort installation : ERROR! dnet header not found

I want to install snort on Manjaro Linux. snort is not available on pacman and I tried to install via code below. pamac build snort I am getting this error ERROR! dnet header not found, go get it ...
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901 views

Snort can’t start and says it failed to parse the IP address: 8.0.0.0/8.0.0.0

I need to use Snort in Windows. I've done the configuration several times but no luck. Snort always returns output like this The Snort configuration file can be found here on Google Drive.
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248 views

Custom Snort rule prevent me from starting the WAN interface

I'm having an issue where when I add a custom rule to my WAN interface(SNORT), I can't start the interface, not even the simplest ping rules work now despite having worked just fine all day. Trouble ...
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1answer
591 views

Configuring virtual network interface as sniffing interface

I have a Snort IDS running Ubuntu Server 16.04 with one physical ethernet interface (eno1). I have configured two virtual network interfaces using the eno1 interface: eno1:0 for the sniffing interface ...
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89 views

Configuring virtual network interface as sniffing interface

I have a Snort IDS running Ubuntu Server 16.04 with one physical ethernet interface (eno1). I have configured two virtual network interfaces using the eno1 interface: eno1:0 for the sniffing interface ...
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1answer
4k views

Snort finding the alert file DATA with snort.logs.xxxxxxx

I'am working on task where my security team is asking me to provide a pcap file under the folder /var/log/snort. They have picked up a source IPADDRESS from an alert file and they need to do more ...
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97 views

Snort Cannot send alert to database

I have some problem with Snort on Ubuntu server 14.04 I don't know why, if my server going down because the electricity going down and if Iam add some table or add privilages on Snort database(mysql), ...
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570 views

fwsnort won't apply rules in iptables

I'm using Debian 8, and I want to update fwsnort rules through this command: fwsnort --update-rules Though after downloading 9.4 MB of rules in '/etc/fwsnort/snort_rules/emerging-all.rules' file, it ...
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1k views

Snort 'make install' error on Linux

I'm trying to install Snort on Debian and I get this error after 'make install': make[6]: Nothing to be done for 'install-exec-am'. /bin/mkdir -p '/usr/local/lib/snort_dynamicengine' /bin/bash ../....
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1answer
579 views

Snort running with pfSense

First of all, I am sorry about my English skill. I have a topology and I want to integrate the Snort with pfSense. Can pfSense auto add firewall rules when Snort alert? Does pfSense have function to ...
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1answer
195 views

snort installation on windows : missing database config line in snort.conf

I installed Snort on windows 7, and added all the rules and everything works fine for me. The thing that I want to add, is to save alerts in mysql database, in my case, in some tutorials that I found ...
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34 views

How can I autonomously dump/push the AP logs from the assortment of devices without logging into each?

I am running an AWS OpenVPN EC2 server providing a VPN for mobile devices. Additionally, I am managing an OpenWRT in my house, an ISP provided Linksys in another state, and a mid-grade Cisco Aironet ...
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1answer
67 views

Bash: I want to count letters and substitute text

OK so I'm extremely new to bash shell scripting and I've been pretty successful up until this point. I'm using BASH to fix a problem... I want to turn a basic domain name: Buddies.forlife.com into |...
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2answers
966 views

How can I type “Edit /etc/snort/snort.conf ” in Mac terminal?

Please help me with: Configuration: Copy the default configuration file from the package into the /etc/snort directory: cp ./etc/* /etc/snort/ Edit /etc/snort/snort.conf and make the ...
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928 views

How to Edit /etc/snort/snort.conf on Mac os x

Configuration 1-Copy the default configuration file from the package into the /etc/snort directory: cp ./etc/* /etc/snort/ 2-Edit /etc/snort/snort.conf and make the following changes: var ...
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334 views

How to detect and alert automatically ARP Poisoning on OSX?

As the Title, I seen various tool with function to detect the Arp Poisoning but nothing of them alerts with message popup or other on OSX. What is the tool that programmatically, every X minute, ...
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1answer
821 views

Snort/Barnyard2 Wont compile on Raspberry Pi with Ubuntu

I've been following this Guide to install snort and barnyard. When I try to configure barnyard I get this error. /usr/local/include/dnet.h:22:23: fatal error: dnet/sctp.h: No such file or directory ...
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1answer
240 views

Snort wont trigger alert from tap interface eth0

I have snort set up on a raspberry pi running a modified Ubuntu. Between my modem and router I have a switch that mirrors all the traffic to a port that is connected to the eth0 interface on my ...
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1answer
502 views

Compiling Snort for OpenWRT

I'm trying to install Snort on an OpenWRT VM. I followed the instructions on the Snort homepage and it looks like it requires the make tool for compiling the code: ./configure --enable-sourcefire; ...
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2answers
4k views

Home Network Setup to Monitor Traffic via Snort

I have a decent background in linux, however, I severely misunderstand networking fundamentals. I am trying to set up a home environment where my Virtual Box RedHat box monitors all the traffic on my ...
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1answer
1k views

Snort installed on Ubuntu not sending alerts to syslog

I have a Magento website setup on a Linux machine that is based on a Bitnami ready-made image. The main goal is to be notified by email whenever there might be a potential attack on the site. My ...
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1answer
913 views

openwrt using iptables with tee seems broken

I've been trying to set up port mirroring on openwrt version 14.07 following this guide: however the command: $iptables -t mangle -A POSTROUTING -o br-lan ! -s 192.168.0.0/16 -j TEE --gateway 192....
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1answer
243 views

Are these Snort rules redundant?

I was looking through the community.rules made available on the Snort web page, and noticed these two rules: Rule @ line 2643: alert udp $HOME_NET any -> any 53 (msg:"BLACKLIST DNS request for ...
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1answer
546 views

Snort Failing to start on Ubuntu 9.04

EDIT: Hey! To anyone stumbling across this question who followed this guide: https://help.ubuntu.com/community/SnortIDS It's too old and WILL NOT work! Find a different one! I'm trying to get Snort ...
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1answer
164 views

How to get details- like Remote ip- about alert genrated by suricata after scanning pcap file

I wanted to test security of my android phone so I leaved it for one day running tcpdump in the background. Then I send resulting pcap to virustotal.com. They are scanning pcap file using snort and ...
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1answer
300 views

Retaining origin when using Snort with a loadbalancer? Or why it's a bad idea?

Initially I deployed HAProxy so that it would be possible to notice bad traffic going into my web server (rather than it being obscured by TLS), but now I noticed the rather obvious problem that once ...
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1answer
436 views

Snorby with PostgreSQL installation issue in Mac OS X 10.10.2 (Yosemite)

Trying to setup Snorby for Snort with PostgreSQL on Mac OS X 10.10.2 (Yosemite) Snort 2.9.7.2 GRE (Build 177) PostgreSQL 9.4.1 ruby 1.9.3p551 (2014-11-13 revision 48407) [x86_64-darwin14.1.0] Here ...
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2answers
19k views

OSX: Snort: ERROR: /etc/snort/../rules/local.rules(0) Unable to open rules file “/etc/snort/../rules/local.rules”: No such file or directory

I'm trying to setup and run Snort IDS on mac using this kinda tutorial: https://discussions.apple.com/thread/3370709?start=0&tstart=0 OSX Yosemite (10.10.2); PostgreSQL 9.4.1 (installed with ...
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1answer
4k views

OSX: Postgresql port 5432 is closed. How to open?

Mac OS X Yosemite (10.10.2) Postgresql 9.4.1 (installed with Homebrew) Snort 2.9.7.0 (installed with Homebrew) I can't connect to psql - port 5432 seem to be closed: $ psql postgres psql: could ...
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307 views

Snort IDS Network Toplogy

I have a network at work, running a domain controller for several workstations and a NAS. All this is behind a Fortigate 100D which has some IPS functionality and is a solid firewall. But I want to ...
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1answer
223 views

SNORT -Unknown command line checksum option: ascii

snort -vde -l /var/log/snort -k ascii when i tried this command it gives me the error Unknown command line checksum option: ascii. I don't know why,coz i hve installed snort successfully, and also ...
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1answer
2k views

Barnyard2 error on start

Been setting up a snort box with barnyard2, run into the error below. Can someone please help? $Starting Snort Output Processor (barnyard2): ./barnyard2: 35: ./barnyard2: barnyard2: not found /etc/...
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1answer
662 views

barnyard2 dead but subsys locked - error

I installed snort and barnyard. When I start the snort service and barnyard service, initially they work. After a while barnyard service give an error. Initially: [root@- snort]# service barnyard2 ...
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1answer
907 views

How to start the Snort service with logging enabled?

I setup snort on Centos server and add as a service. When I use service snortd start command, the log file is created but it is empty. If I use snort -q -l /var/log/snort command, the log file created ...
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13k views

Error configuring Snort

I am setting up snort on Windows 8 machine and having trouble with it. I am following the instructions mentioned here: http://www.snort.org/assets/151/Installing_Snort_2.8.6.1_on_Windows_7.pdf On ...
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1answer
359 views

Snort 2.9.6 doesn't alert with VRT ruleset but with ETOpen

I have subscribed to Snort VRT and received the latest rule set (snortrules-snapshot-2956.tar.gz), I installed snort from source using (http://www.snort.org/assets/158/snortinstallguide293.pdf) guide ...
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2answers
506 views

Monitoring network traffic via switch access

I'd like to experiment with monitoring my home network traffic and wondering if a particular solution I have in mind will work. I have a pretty standard setup, Verizon FIOS coming in to my house and ...
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3answers
2k views

Snort error on FreeBSD-9: Unknown preprocessor “ftp_telnet”

I've installed "Snort" on FreeBSD-9.1 (32-bit) from the standard ports using: pkg_add -r snort After configuring and running with: snort -c /etc/snort/snort.conf -A full -u snort -g snort -i em1 -T ...
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2answers
259 views

wifi router is masking ip addresses

I have a rookie question regarding routing and wifi access points. Background I have a main switch (cisco catalyst 2950) that sits behind my router/firewall. On that switch I have an IDS (snort) ...
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2answers
4k views

Error While Running Snort

I have been trying to get snort IDS to work, but I having some difficulty. When I run snort -c /etc/snort/snort.conf -l /var/log/snort I keep getting this error. Initializing rule chains... Warning: ...
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2answers
2k views

Snort install issue on debian 6 with libpcre - libpcre library not found

I've read the manual on snort.org for installing snort on Debian but am still having an issue. Does anyone know how to resolve this? I've tried installing the libpcre3 amd libpcre3-dev packages by ...