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FELIPE FERREIRA

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Category: Security

Security

By : Felipe Ferreira16/04/2013
Linux, Security Leave a Comment on How to fix mod_ssl CRIME attack

How to fix mod_ssl CRIME attack

More detailed information on what and how the attack works is here
I will focus only on fixing the problem. On RHEL server 5.x and 6.x the easy way is …

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Tags: apache, attack, compression, crime, fix, HowTo, httpd, Linux, mod_ssl, redhat
By : Felipe Ferreira15/10/2012
HowTo, Security Leave a Comment on Pass-the-hash from memory

Pass-the-hash from memory

This is the most impressive and scariest hack I ever seen.
The tool called WCE, Windows Credential Editor can get any password
from a Windows box, from memory! So even …

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Tags: admin, domain, hack, local, memory, ntlm, Pass-the-hash, wce, windows
By : Felipe Ferreira29/12/2011
HowTo, Linux, Security Leave a Comment on reset redhat 5 password

reset redhat 5 password

reset redhat 5 password +boot
When you lost your root password in a RedHat Linux Based systems you should first have access to the console, (the machine itself).
Power on, …

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Tags: grub, Linux, lost, passwd, password, recover, redhat
By : Felipe Ferreira21/07/2011
HowTo, Linux, Security Leave a Comment on How to Install iftop

How to Install iftop

How to Install iftop on RedHat 6 64 bits, CentOS.
iftop is a very very cool tool. It displays what connections are made and their usage etc…

Script to Install…

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Tags: HOW, HowTo, iftop, install, network, setup, to, tool
By : Felipe Ferreira12/07/2011
HowTo, Linux, Security 2 Comments on How to setup sshguard

How to setup sshguard

How to setup sshguard
Using Iptables and centos or redhat
(another option is to use fail2ban, checkout my howto here )
1.Download sshguard source and compile it (could also …

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Tags: 5.5, 6, 64, centos, HowTo, Iptables, redhat, setup, sshguard
By : Felipe Ferreira29/03/2011
HowTo, Linux, Security Leave a Comment on NETFILTER PACKET FLOW

NETFILTER PACKET FLOW

NETFILTER PACKET FLOW (kernel):

DROP   will not warn
REJECT will let them know its closed
example:
(RULE CHECK CHAIN)  (THE RULE, WHAT TO DO)
iptables -t filter -A INPUT -s …

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Tags: basic, configuration, FLOW, HowTo, Iptables, netfilter, PACKET, setup
By : Felipe Ferreira06/05/2010
HowTo, Security Leave a Comment on NTFS ACL Behaviour

NTFS ACL Behaviour

NTFS ACL Behaviour
If propagate from parent is checked
the original folder permissions will totally be replaced by the new parent settings.
example:
Directory c:tempjoe
permissions: joe RW , smith …

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Tags: ACL, Behaviour, HowTo, NTFS, permission, security, sets

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