Richard Davis 13Cubed
13Cubed
/ dns-sniffer.sh
Last active
March 2, 2017 16:21
A Bash script to call tcpdump for DNS traffic capture.
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| #!/bin/bash | |
| # Note: Do not run this script as root. You know better than that. Allow the standard user under which it runs the ability to execute /usr/sbin/tcpdump. | |
| # Example: setcap 'CAP_NET_RAW+eip CAP_NET_ADMIN+eip' /usr/sbin/dumpcap | |
| /usr/sbin/tcpdump -i [INTERFACE] -s0 -G 300 -w '/capture/dns_%Y-%m-%d_%H:%M:%S.pcap' 'port 53' |
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| # .conkyrc | |
| background yes | |
| use_xft yes | |
| xftfont Droid:normal:size=10 | |
| xftalpha 1 | |
| update_interval 1.0 | |
| top_cpu_separate true | |
| total_run_times 0 | |
| own_window yes |
13Cubed
/ update_aws.sh
Last active
March 30, 2020 09:43
Update AWS Route 53 and EC2 Security Group upon change in dynamic IP address. Roll your own dynamic DNS service, and update associated security groups by adding the new IP and cleaning up the previous IP to prevent unauthorized access to EC2 instances. Note: calls AWS CLI, and cli53 to make Route 53 changes (https://github.com/barnybug/cli53).
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| #!/bin/bash | |
| ZONE="example.com" | |
| HOSTNAME="test" | |
| SGROUP="my_security_group" | |
| CURRENT_IP=$(dig @resolver1.opendns.com myip.opendns.com +short) | |
| OLD_IP=$(dig @resolver1.opendns.com $HOSTNAME.$ZONE +short) | |
| if [[ $CURRENT_IP =~ [0-9]+\.[0-9]+\.[0-9]+\.[0-9]+ ]] ; then |
13Cubed
/ update_dnsbl.sh
Last active
October 23, 2020 06:55
Download DNS adware and malware blacklists in BIND format and add them to a blacklist zone file. This is a modified version of the script from Paul's Security Weekly (http://wiki.securityweekly.com/wiki/index.php/Episode472).
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| #!/bin/bash | |
| HOME=/var/named | |
| ADLISTURL="https://pgl.yoyo.org/adservers/serverlist.php?hostformat=bindconfig;showintro=0;mimetype=plaintext" | |
| MWLISTURL="http://mirror1.malwaredomains.com/files/spywaredomains.zones" | |
| ADLISTFILE=/tmp/adlistfile | |
| MWLISTFILE=/tmp/mwlistfile | |
| # Download newest blacklists | |
| curl -s -o $ADLISTFILE $ADLISTURL |
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