-s $LAN_SUBNET -d $RSS -m pkttype --pkt-type unicast -m addrtype --dst-type LOCAL\ - DNS cache/server to speed up DNS requests and filter out bad DNS queries I couldn't believe to get this running at first. # Block & Log everything else SNORT_CONF="/etc/snort/snort.conf" DNS_SERVER1="8.8.8.8" ############################################################################################## Below, you will find a very restrictive firewall script. Isn't that a bottle neck? %wheel ALL=(ALL) ALL Download the Logstash Debian package from Elastic’s repository. The Raspberry Pi is an amazing little inexpensive Linux-based computer. Ensure you have java 1.8 installed. Tras esto cambié la configuración del escritorio, para que se mostrasen los elementos, como por ejemplo los lanzadores. -m state --state NEW,ESTABLISHED,RELATED -j GATEWAY_LAN LAN="eth0" If everything is ok, comment your test rule : In my last post, I demonstrated how easy it is to create fake accounts on the major social networks. "[IPTABLES: ICMP REDIRECT]" --src-range $DHCP_RANGE ! Unpack the TAR and move the content to the. iptables -t filter -X # (you may add a check for the remote OS) Alternate Job Titles for Exploitation analyst or penetration tester? ############################################################################################## if this account gets compromized, we've got some serious problems. $ cd opt $ wget https://downloads.graylog.org/releases/graylog/graylog-3.0.0-beta.2.tgz -O graylog-server.tar.gz$ sudo tar -xf graylog-server.tar.gz$ sudo mv /opt/graylog-3.0.0-beta.2 /opt/graylog-server$ sudo rm graylog-server.tar.gz. preprocessor ftp_telnet: global inspection_type stateful encrypted_traffic no ! max_encrypted_packets 20 \ Another functionality would be to send the DNS logs to Graylog as well. - Win32DiskManager software ftp_cmds { EPSV ESTA ESTP FEAT HELP LANG LIST LPRT } \ # pacman -Syu ## TOTAL FILES = 21 files to load LogLevel INFO iptables -t nat -F After the boot sequence you are prompted to enter a login. StackOverflow posts and GitHub issues were particularly helpful for that – I listed the two I used in the References at the end of this article. -m state ! I've worked for startups and big enterprises in Europe and US, and have delivered software to millions if not billions of devices. You can chose between firewall.advanced or firewall.simple, and then customise it. Remove from startup the unneeded daemons : If you wish to do so, follow what is below. $ sudo vi /etc/fstab iptables -A FORWARD_IN -m limit --limit 1/s -j LOG --log-prefix "[IPTABLES: FORWARD_IN]" iptables -A FORWARD_OUT -p tcp --dport 139 -m recent --name bad_traffic --set -j LOGDROP_BADPORT In this article I’ll be providing a basic walkthrough of how to setup an Arm64/Aarch64 device such as the Rock64 as a secure Wifi AP with Pi-Hole DNS and an IDS. We need to add our Snort output to the Graylog. # Reputation preprocessor. client_flow_depth 0 \ Would it then just hand on a Switch with Modem configured to only communicate with the RPi and an existing WLAN-router also configured only communicating with the RPi? u_encode yes \ -s $LAN_SUBNET -d $RSS -p icmp -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A FORWARD_OUT -p tcp --sport $UNPRIV_PORTS --dport $UNPRIV_PORTS -m state --state \ This subreddit also lists tutorials and guides for the newbies to make the best use of their Raspberry Pi for learning and understanding about computers and software. # iptables -A INPUT -p icmp -m icmp --icmp-type echo-request -s $LAN_SUBNET -d $RSS -j ACCEPT # include $SO_RULE_PATH/icmp.rules -d $LAN_SUBNET -m state --state NEW,ESTABLISHED,RELATED \ iptables -A LOGDROP_BADPORT -j DROP -m state --state NEW,ESTABLISHED,RELATED -j GATEWAY_INTERNET It’s a rather beefy device for its small factor size and perfectly able to manage the AP and IDS. iptables -A CHECK_TCP_FLAGS -p tcp --tcp-flags SYN,FIN SYN,FIN -j LOGDROP_TCP_FLAGS -d $LAN_SUBNET -m pkttype --pkt-type unicast -m addrtype --dst-type UNICAST\ LOGDROP_MALWARE Last night I had some free time to play with my network, and I ran  tcpdump out of curiosity. ##############################################################################################

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