Removed some hyperlinks and cleaned up a few codeblocks
This commit is contained in:
ganome
parent
57d07f1f13
commit
ecced9e5bb
GPG Key ID:
944DE53336D81B83
@ -17,18 +17,14 @@ Key features:
|
||||
|
||||
On most Linux distributions, eCryptfs can be installed using the package manager:
|
||||
|
||||
```bash
|
||||
# For Ubuntu/Debian:
|
||||
sudo apt-get install ecryptfs-utils
|
||||
```
|
||||
```bash
|
||||
# For Fedora:
|
||||
sudo dnf install ecryptfs-utils
|
||||
```
|
||||
```bash
|
||||
# For Arch Linux:
|
||||
sudo pacman -S ecryptfs-utils
|
||||
```
|
||||
For Ubuntu/Debian:
|
||||
`sudo apt-get install ecryptfs-utils`
|
||||
|
||||
For Fedora:
|
||||
`sudo dnf install ecryptfs-utils`
|
||||
|
||||
For Arch Linux:
|
||||
`sudo pacman -S ecryptfs-utils`
|
||||
|
||||
## 3. Setting up eCryptfs
|
||||
|
||||
@ -66,15 +62,11 @@ mount -t ecryptfs ~/encrypted ~/encrypted
|
||||
|
||||
### - Unmounting:
|
||||
|
||||
```bash
|
||||
umount ~/encrypted
|
||||
```
|
||||
`umount ~/encrypted`
|
||||
|
||||
### - Checking mount status:
|
||||
|
||||
```bash
|
||||
mount | grep ecryptfs
|
||||
```
|
||||
`mount | grep ecryptfs`
|
||||
|
||||
## 5. Key Management
|
||||
|
||||
@ -82,15 +74,11 @@ eCryptfs uses a passphrase to derive the encryption key. This passphrase is stor
|
||||
|
||||
### - Adding a key to the keyring:
|
||||
|
||||
```bash
|
||||
ecryptfs-add-passphrase
|
||||
```
|
||||
`ecryptfs-add-passphrase`
|
||||
|
||||
### - Removing a key from the keyring:
|
||||
|
||||
```bash
|
||||
keyctl purge user ecryptfs
|
||||
```
|
||||
`keyctl purge user ecryptfs`
|
||||
|
||||
## 6. Advanced Features
|
||||
|
||||
@ -98,15 +86,11 @@ keyctl purge user ecryptfs
|
||||
|
||||
Create a file containing your mount options:
|
||||
|
||||
```bash
|
||||
echo "passphrase_passwd=your_passphrase" > ~/.ecryptfsrc
|
||||
```
|
||||
`echo "passphrase_passwd=your_passphrase" > ~/.ecryptfsrc`
|
||||
|
||||
Then mount using:
|
||||
|
||||
```bash
|
||||
mount -t ecryptfs -o conf=~/.ecryptfsrc ~/encrypted ~/encrypted
|
||||
```
|
||||
`mount -t ecryptfs -o conf=~/.ecryptfsrc ~/encrypted ~/encrypted`
|
||||
|
||||
### - Using different encryption for different directories:
|
||||
|
||||
@ -125,15 +109,11 @@ You can mount multiple eCryptfs directories with different encryption settings b
|
||||
|
||||
If you can't mount the filesystem, check if the required kernel modules are loaded:
|
||||
|
||||
```bash
|
||||
lsmod | grep ecryptfs
|
||||
```
|
||||
`lsmod | grep ecryptfs`
|
||||
|
||||
If not present, load them:
|
||||
|
||||
```bash
|
||||
sudo modprobe ecryptfs
|
||||
```
|
||||
`sudo modprobe ecryptfs`
|
||||
|
||||
## !!!If you forget your passphrase, there's no way to recover the data. Always keep secure backups!!!
|
||||
|
||||
|
||||
@ -16,36 +16,28 @@ OpenSSL is a robust, full-featured open-source toolkit that implements the Secur
|
||||
OpenSSL is available for various operating systems. Here are basic installation instructions:
|
||||
|
||||
- Linux: Most distributions come with OpenSSL pre-installed. If not, use package managers:
|
||||
```bash
|
||||
sudo apt-get install openssl libssl-dev # For Debian/Ubuntu
|
||||
```
|
||||
```bash
|
||||
sudo yum install openssl openssl-devel # For CentOS/RHEL
|
||||
```
|
||||
`sudo apt-get install openssl libssl-dev # For Debian/Ubuntu`
|
||||
|
||||
`sudo yum install openssl openssl-devel # For CentOS/RHEL`
|
||||
|
||||
- macOS: Use Homebrew:
|
||||
```
|
||||
brew install openssl
|
||||
```
|
||||
`brew install openssl`
|
||||
|
||||
- Windows: Download the installer from the official OpenSSL website.
|
||||
|
||||
## 4. Basic OpenSSL Commands
|
||||
|
||||
- Generate a private key:
|
||||
```bash
|
||||
openssl genrsa -out private.key 2048
|
||||
```
|
||||
|
||||
`openssl genrsa -out private.key 2048`
|
||||
|
||||
- Create a Certificate Signing Request (CSR):
|
||||
```bash
|
||||
openssl req -new -key private.key -out certificate.csr
|
||||
```
|
||||
|
||||
`openssl req -new -key private.key -out certificate.csr`
|
||||
|
||||
- Generate a self-signed certificate:
|
||||
```bash
|
||||
openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365
|
||||
```
|
||||
|
||||
`openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365`
|
||||
|
||||
## 5. Implementing SSL/TLS in Network Applications
|
||||
|
||||
|
||||
@ -11,10 +11,7 @@ Fail2Ban is an intrusion prevention software framework that protects Linux syste
|
||||
- Updates firewall rules to block banned IPs
|
||||
|
||||
### Installation:
|
||||
```bash
|
||||
sudo apt-get update
|
||||
sudo apt-get install fail2ban
|
||||
```
|
||||
`sudo apt-get update && sudo apt-get install fail2ban`
|
||||
|
||||
### Configuration:
|
||||
- Main configuration file: `/etc/fail2ban/jail.conf`
|
||||
@ -56,10 +53,7 @@ AIDE is a file and directory integrity checker that detects unauthorized changes
|
||||
- Reports any discrepancies, indicating potential security breaches
|
||||
|
||||
### Installation:
|
||||
```bash
|
||||
sudo apt-get update
|
||||
sudo apt-get install aide
|
||||
```
|
||||
`sudo apt-get update && sudo apt-get install aide`
|
||||
|
||||
### Configuration:
|
||||
- Main configuration file: /etc/aide/aide.conf
|
||||
|
||||
@ -18,17 +18,13 @@ SELinux operates in three modes:
|
||||
- Disabled: SELinux is turned off
|
||||
|
||||
To check the current mode:
|
||||
```
|
||||
getenforce
|
||||
```
|
||||
`getenforce`
|
||||
|
||||
To change modes temporarily:
|
||||
```bash
|
||||
setenforce 0 # Set to permissive
|
||||
```
|
||||
```bash
|
||||
setenforce 1 # Set to enforcing
|
||||
```
|
||||
|
||||
`setenforce 0` # Set to permissive
|
||||
|
||||
`setenforce 1` # Set to enforcing
|
||||
|
||||
To change modes permanently, edit /etc/selinux/config and reboot.
|
||||
|
||||
@ -43,10 +39,11 @@ system_u:object_r:httpd_sys_content_t:s0
|
||||
```
|
||||
|
||||
To view contexts:
|
||||
```
|
||||
ls -Z # For files
|
||||
ps auxZ # For processes
|
||||
```
|
||||
|
||||
`ls -Z` # For files
|
||||
|
||||
`ps auxZ` # For processes
|
||||
|
||||
|
||||
## 4. SELinux Policies
|
||||
|
||||
@ -59,84 +56,56 @@ SELinux uses policies to define allowed actions. Two main policy types:
|
||||
Booleans are on/off switches that allow runtime customization of SELinux policies.
|
||||
|
||||
To list all booleans:
|
||||
```
|
||||
getsebool -a
|
||||
```
|
||||
`getsebool -a`
|
||||
|
||||
To change a boolean:
|
||||
```bash
|
||||
setsebool httpd_can_network_connect on
|
||||
```
|
||||
`setsebool httpd_can_network_connect on`
|
||||
|
||||
To make the change persistent:
|
||||
```bash
|
||||
setsebool -P httpd_can_network_connect on
|
||||
```
|
||||
`setsebool -P httpd_can_network_connect on`
|
||||
|
||||
## 6. Troubleshooting SELinux
|
||||
|
||||
- Check for denials:
|
||||
```
|
||||
ausearch -m AVC,USER_AVC,SELINUX_ERR -ts recent
|
||||
```
|
||||
`ausearch -m AVC,USER_AVC,SELINUX_ERR -ts recent`
|
||||
|
||||
- Use SELinux troubleshooter:
|
||||
```
|
||||
sealert -a /var/log/audit/audit.log
|
||||
```
|
||||
`sealert -a /var/log/audit/audit.log`
|
||||
|
||||
- Analyze SELinux logs:
|
||||
```
|
||||
grep "SELinux" /var/log/messages
|
||||
```
|
||||
`grep "SELinux" /var/log/messages`
|
||||
|
||||
## 7. File and Directory Labeling
|
||||
|
||||
To change the SELinux context of a file or directory:
|
||||
```
|
||||
chcon -t httpd_sys_content_t /path/to/file
|
||||
```
|
||||
`chcon -t httpd_sys_content_t /path/to/file`
|
||||
|
||||
To restore the default context:
|
||||
```
|
||||
restorecon -v /path/to/file
|
||||
```
|
||||
`restorecon -v /path/to/file`
|
||||
|
||||
## 8. Managing SELinux Modules
|
||||
|
||||
List available modules:
|
||||
```
|
||||
semodule -l
|
||||
```
|
||||
`semodule -l`
|
||||
|
||||
Enable a module:
|
||||
```
|
||||
semodule -e modulename
|
||||
```
|
||||
`semodule -e modulename`
|
||||
|
||||
Disable a module:
|
||||
```
|
||||
semodule -d modulename
|
||||
```
|
||||
`semodule -d modulename`
|
||||
|
||||
## 9. Creating Custom SELinux Policies
|
||||
|
||||
For complex environments, you may need to create custom policies:
|
||||
|
||||
- Install policy development tools:
|
||||
```
|
||||
yum install selinux-policy-devel
|
||||
```
|
||||
`yum install selinux-policy-devel`
|
||||
|
||||
- Write a policy module (.te file)
|
||||
- Compile and package the module:
|
||||
```
|
||||
make -f /usr/share/selinux/devel/Makefile
|
||||
```
|
||||
`make -f /usr/share/selinux/devel/Makefile`
|
||||
- Install the module:
|
||||
```
|
||||
semodule -i mymodule.pp
|
||||
```
|
||||
`semodule -i mymodule.pp`
|
||||
|
||||
## 10. SELinux and Containers
|
||||
|
||||
@ -145,9 +114,7 @@ SELinux provides strong isolation for containers:
|
||||
- Prevents container processes from accessing host resources
|
||||
|
||||
To run a container with a specific SELinux context:
|
||||
```
|
||||
docker run --security-opt label=type:svirt_lxc_net_t my_image
|
||||
```
|
||||
`docker run --security-opt label=type:svirt_lxc_net_t my_image`
|
||||
|
||||
## 11. Best Practices
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user