DenyHosts
DenyHosts is a Python based security tool for SSH servers. It is intended to prevent brute force attacks on SSH servers by monitoring invalid login attempts in the authentication log and blocking the originating IP addresses. Denyhosts is developed by Phil Schwartz the developer of several other popular open source tools such as Kodos and ReleaseForge.
Fail2ban is a similar program that prevents SSH brute force attacks.
Operation
When run as a cron job, DenyHosts checks the end of the authentication log for recent failed login attempts. It records information about their originating IP addresses and compares the number of invalid attempts to a user-specified threshold. If there have been too many invalid attempts it assumes a dictionary attack is occurring and prevents the IP address from making any further attempts by adding it to /etc/hosts.deny on the server. DenyHosts 2.0 and above support centralized synchronization, so that repeat offenders are blocked from many computers.
Additionally, DenyHosts provides a daemon mode running from /etc/init.d or equivalent on unix-like operating systems.
See also
- TCP Wrappers
- OpenSSH
- lsh
- BlockHosts
External links
- DenyHosts website
- DenyHosts statistics and centrally blocked hosts
- The homepage of Phil Schwartz
- ReleaseForge is a GUI for SourceForge project administrators
- Kodos is a Regular Expression debugger
- Fail2ban website
- Travel Sentry® Four-Dial Combo Lock (pr) - Magellan's Travel Supplies With ordinary luggage locks, it's a 50-50 chance they will break off On our recent trip, my luggage was opened and inspected, and the lock put back on.
- What are TSA Approved Luggage Locks? Brief and Straightforward Guide: What are TSA Approved Luggage Locks?
- TSA Lock and Luggage Locks TSA Luggage Locks, baggage, luggage grips and accessories for Airport Security.
- Luggage Locks, Luggage Straps & Luggage Labels Luggage and suitcase accessories including luggage straps, locks and tags at ifsogo.com The Travel Accessories Superstore – UK online store.
- NewsChannel6 - LUGGAGE LOCKS But she does have new locks. Vermilye gave us new ones for her, along with a TSA-recognized locking luggage strap for her next trip.
- USA WEEKEND Magazine TravelSmart: "Legal" luggage locks MoneySmart: Little deductions Online extras Contact a columnist, THINK SMART Helpful tips for your everyday life
- Luggage Lock Travel Sentry, Inc., a company in the luggage lock business, has been sued for patent infringement by the inventor of US Patents 7021537 and 7036728.
- TSA Luggage Lock, TSA Locks, TSA, tsa approved lock, tsa padlocks TSA Luggage Lock, TSA Locks, TSA, tsa approved lock, tsa padlocks, searchalert, search alert, tsa approved luggage lock, tsa approved padlocks, tsa approved
- TSA 3-Dial Combination Indicator Luggage Lock in colors Feel confident that your valuables are safely locked inside your check-in bags. New airline screener friendly lock allows screeners access to your bags
- The Practical Nomad blog: "Key escrow" with TSA for airline Currently, the TSA claims it isn't liable to passengers for damage to locks or luggage when it breaks into bags. That's generally true, but that doesn't
- Travel Security Items - Luggage Locks luggage locks, luggage lock, lock luggage, locks luggage, bag lock, lock bag, lock bags, duffel bag lock, duffel bag locks, lock duffel bag, austin house,
