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

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Snort Error: Unable to open rules file: Permission denied

Attempting to configure Snort for the first time. Keep getting the error Unable to open rules file "C:\directoryname\Snort\rules": Permission denied. I have directed snort to the directory containing ...
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Why does Snort say “Unable to open rules file: Invalid argument” when I try to start it?

I get the following error while trying to run Snort with the following Command Arguments. This is my first time setting up Snort so not sure what I'm doing wrong... CMD LINE ARGS: snort -A console -c ...
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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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15 views

Snort packet drop rate measuring

I am running 12 instances of Snort (1 instance per core) with PF_RING enabled in inline mode on Ubuntu 12.04 x64. How can I measure total packet drop rate? ifconfig shows 0 dropped packets which is ...
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1answer
21 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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14 views

How to detect packet with specific “Total Length” or “Header Length” using Snort?

I'm using Snort to tutorial purposes. As you may know, it brings different rules available for the user to detect different types of transmission packets. The question is that I don't find any ...
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1answer
43 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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52 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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1k views

Snort email rule to alert about any email from a specific user

I am new to snort rules and need a rule that will alert any email from a specific user.. For example: alert tcp any any -> any 25 (msg:"Target Email Detected"; content:"email@thatemail.com"; ...
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70 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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227 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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45 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
94 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
355 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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47 views

Run script after Suricata drops or alarms

I have a Suricata IPS. I want after droping some packets, block their IP in my other servers. I have the command needed to block them. I just don't know how to parse new lines at fast.log and drop.log,...
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1answer
178 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
54 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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179 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
92 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
86 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
176 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] ...
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1answer
88 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
774 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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4k 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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99 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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88 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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1k 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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381 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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5k 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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157 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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245 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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3answers
253 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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1answer
735 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 -...
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2answers
4k views

Blocking Skype using snort and iptables

I am trying to block Skype using snort and iptables. I read a lot of papers and blocked the port, keywords and patterns which Skype uses. But it is still not blocked. My question is: if Skype uses ...
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2answers
2k 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
159 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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705 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 ...