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2018-019-50 good ways to protect your network, brakesec summer reading program

By Brian Boettcher, Amanda Berlin, and Bryan Brake

Ms. Berlin’s mega tweet on protecting your network   Utica College CYB617     I tweeted “utica university” many pardons   Mr. Childress’ high school class Laurens, South Carolina   Probably spent as much as a daily coffee at Starbucks… makes all the difference.   CTF Club, and book club (summer reading series)   Patreon SeaSec East   Showmecon Area41con bsidescleveland Here are 50 FREE things you can do to improve the security of most environments:   Segmentation/Networking: Access control lists are your friend (deny all first) Disable ports that are unused, & setup port security DMZ behind separate firewall Egress Filtering (should be just as strict as Ingress) Geoblocking Segment with Vlans Restrict access to backups Role based servers only! DNS servers/DCs are just that Network device backups Windows: AD delegation of rights Best practice GPO (NIST GPO templates) Disable LLMNR/NetBios EMET (when OSes prior to 10 are present) Get rid of open shares MSBSA WSUS ** run as a standard user ** no ‘localadmin’ Endpoints: App Whitelisting Block browsing from servers. Not all machines need internet access Change ilo settings/passwords Use Bitlocker/encryption Patch *nix boxes Remove unneeded software Upgrade firmware MFA/Auth: Diff. local admin passwords (LAPS) Setup centralized logins for network devices. Use TACACS+ or radius Least privileges EVERYWHERE Separation of rights - Domain Admin use should be sparse & audited Logging Monitoring: Force advanced file auditing (ransomware detection) Log successful and unsuccessful logins - Windows/Linux logging cheatsheets Web: Fail2ban For the love of god implement TLS 1.2/3 URLscan Ensure web logins use HTTPS Mod security   Other: Block Dns zone transfers Close open mail relays Disable telnet & other insecure protocols or alert on use DNS servers should not be openly recursive Don't forget your printers (saved creds aren't good) Locate and destroy plain text passwords No open wi-fi, use WPA2 + AES Password safes IR: Incident Response drills Incident Response Runbook & Bugout bag Incident Response tabletops   Purple Team: Internal & OSINT honeypots User Education exercises MITRE ATT&CK Matrix is your friend Vulnerability Scanner   Join our #Slack Channel! Email us at or DM us on Twitter @brakesec #Spotify: #RSS: #Youtube Channel: #iTunes Store Link: #Google Play Store: Our main site: #iHeartRadio App: #SoundCloud: Comments, Questions, Feedback: Support Brakeing Down Security Podcast by using our #Paypal: OR our #Patreon #Twitter: @brakesec @boettcherpwned @bryanbrake @infosystir #Player.FM : #Stitcher Network: #TuneIn Radio App:

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