Aker SSH Gateway

What is Aker?

Aker is a security tool that helps you configure your own Linux ssh jump/bastion host. Named after an Egyptian mythology deity who guarded the borders, Aker would act as choke point through which all your sysadmins and support staff access Linux production servers. Aker SSH gateway includes a lot of security features that would help you manage and administer thousands of Linux servers at ease. For a detailed look check our Wiki

Motivation

I couldn't find an open source tool similar to CryptoAuditor and fudo, such tools are beneficial if you're seeking becoming PCI-DSS or HIPAA compliant for example, regardless of security standards compliance access to the server should be controlled and organized in a way convenient to both traditional and cloud workloads.

Current Featuers

Supports FreeIPA 4.2 , 4.3 and 4.4 (Optional)
Extensible, Write Your Own Module
Session Playback
Extract Session Commands
SIEM-Ready json Session Logs
Elasticsearch Integration

Roadmap

Phase 0
- Integration with an identity provider (FreeIPA)
- Extendable Modular structure, plugin your own module
- Integration with config management tools
- Parsable audit logs (json, shipped to Elasticsearch)
- Highly available setup
- Session playback
Phase 1
- Admin WebUI
- Live session monitoring
- Cloud support (AWS,OpenStack etc..) or On-premises deployments
- Command filtering (Prevent destructive commands like rm -rf)
- Encrypt sessions logs stored on disk.
Phase 2
- Support for graphical protocols (RDP, VNC, X11) monitoring
- User productivity dashboard

See it in action

Requirements

Software:

Linux (Tested on CentOS, Fedora and ubuntu)
Python (Tested on 2.7)
(Optional) FreeIPA, Tested on FreeIPA 4.2 & 4.3
redis

Python Modules:

configparser
urwid
paramiko
wcwidth
pyte
redis

Installation

Automated :
- Use this ansible playbook
Manually:

Aker can be setup on a FreeIPA client or indepentantly using json config file.

Common Steps (FreeIPA or Json):

Clone the repo

 git clone https://github.com/aker-gateway/Aker.git /usr/bin/aker/

Install dependencies (adapt for Ubuntu)

 yum -y install epel-release 
 yum -y install python2-paramiko python-configparser python-redis python-urwid python2-wcwidth redis

Set files executable perms

chmod 755 /usr/bin/aker/aker.py
chmod 755 /usr/bin/aker/akerctl.py

Setup logdir and perms

mkdir /var/log/aker
chmod 777 /var/log/aker
touch /var/log/aker/aker.log
chmod 777 /var/log/aker/aker.log

Enforce aker on all users but root, edit sshd_config

Match Group *,!root
ForceCommand /usr/bin/aker/aker.py

Restart ssh
Restart redis

Choosing FreeIPA:

Assumptions:
- Aker server already enrolled to FreeIPA domain

Create /etc/aker and copy /usr/bin/aker/aker.ini in it and edit it like below :

```
[General]
log_level = INFO
ssh_port = 22

# Identity Provider to determine the list of available hosts
# options shipped are IPA, Json. Default is IPA
idp = IPA
hosts_file = /etc/aker/hosts.json

# FreeIPA hostgroup name contatining Aker gateways
# to be excluded from hosts presented to user
gateway_group = gateways
```

Choosing Json: