[PPNL-Techteam] csf firewall

[Bob Sikkema | DigitalForce.eu]

Zie onder

On 18-07-12 00:09, Casper Gielen wrote:
> On 07/17/12 21:14, Bob Sikkema | Piratenpartij.nl wrote:
>> Hier een stukje over de installatie van csf;
>> http://mccsrv.com/redmine/projects/ppnl-techteam/wiki/Csf_Firewall
> 
> Ah, documentatie, leuk :)
> 
> Een paar opmerkingen.
> - hoe (un)block ik een poort?
aangepast in docu. csf op de commandline geeft je alle opties.

> - is er een manier om de configuratie te testen voor hij actief wordt?
ja, aangepast in documentatie. zit de varaiable test in de configfile.
Deze zorgt dat alle rules na 5 minuten vervallen./

> - moeten we niet wat adressen whitelisten voor het geval er iets mis gaat?
kan altijd enteren via console. Dit is tunen, dus moeten we met elkaar
afstemmen hoe/wat

> - ik verwachte eigenlijk allerlei scans en checks op mislukte inlogpogingen
>   enzo, daar zie ik niks van terug
Staat op de frontpage van csf; http://configserver.com/cp/csf.html
'k Ga deze neit copy-pasten op de redmine. Maar hier eventjes dan;

    Straight-forward SPI iptables firewall script
    Daemon process that checks for login authentication failures for:
        Courier imap, Dovecot, uw-imap, Kerio
        openSSH
        cPanel, WHM, Webmail (cPanel servers only)
        Pure-ftpd, vsftpd, Proftpd
        Password protected web pages (htpasswd)
        Mod_security failures (v1 and v2)
        Suhosin failures
        Exim SMTP AUTH
        Custom login failures with separate log file and regular
expression matching
    POP3/IMAP login tracking to enforce logins per hour
    SSH login notification
    SU login notification
    Excessive connection blocking
    UI Integration for cPanel, DirectAdmin and Webmin
    Easy upgrade between versions from within cPanel/WHM, DirectAdmin or
Webmin
    Easy upgrade between versions from shell
    Pre-configured to work on a cPanel server with all the standard
cPanel ports open
    Pre-configured to work on a DirectAdmin server with all the standard
DirectAdmin ports open
    Auto-configures the SSH port if it's non-standard on installation
    Block traffic on unused server IP addresses - helps reduce the risk
to your server
    Alert when end-user scripts sending excessive emails per hour - for
identifying spamming scripts
    Suspicious process reporting - reports potential exploits running on
the server
    Excessive user processes reporting
    Excessive user process usage reporting and optional termination
    Suspicious file reporting - reports potential exploit files in /tmp
and similar directories
    Directory and file watching - reports if a watched directory or a
file changes
    Block traffic on the DShield Block List and the Spamhaus DROP List
    BOGON packet protection
    Pre-configured settings for Low, Medium or High firewall security
(cPanel servers only)
    Works with multiple ethernet devices
    Server Security Check - Performs a basic security and settings check
on the server (via cPanel/DirectAdmin/Webmin UI)
    Allow Dynamic DNS IP addresses - always allow your IP address even
if it changes whenever you connect to the internet
    Alert sent if server load average remains high for a specified
length of time
    mod_security log reporting (if installed)
    Email relay tracking - tracks all email sent through the server and
issues alerts for excessive usage (cPanel servers only)
    IDS (Intrusion Detection System) - the last line of detection alerts
you to changes to system and application binaries
    SYN Flood protection
    Ping of death protection
    Port Scan tracking and blocking
    Permanent and Temporary (with TTL) IP blocking
    Exploit checks
    Account modification tracking - sends alerts if an account entry is
modified, e.g. if the password is changed or the login shell
    Shared syslog aware
    Messenger Service - Allows you to redirect connection requests from
blocked IP addresses to preconfigured text and html pages to inform the
visitor that they have been blocked in the firewall. This can be
particularly useful for those with a large user base and help process
support requests more efficiently
    Country Code blocking - Allows you to deny or allow access by ISO
Country Code
    Port Flooding Detection - Per IP, per Port connection flooding
detection and mitigation to help block DOS attacks
    DirectAdmin UI integration
    Updated Webmin UI integration
    WHM root access notification (cPanel servers only)
    New in v5: lfd Clustering - allows IP address blocks to be
automatically propagated around a group of servers running lfd. It
allows allows cluster-wide allows, removals and configuration changes
    New in v5: Quick start csf - deferred startup by lfd for servers
with large block and/or allow lists
    New in v5: Distributed Login Failure Attack detection
    New in v5: Temporary IP allows (with TTL)
    New in v5: IPv6 Support with ip6tables
    New in v5: Integrated UI - no need for a separate Control Panel or
Apache to use the csf configuration
    New in v5: Integrated support for cse within the Integrated UI
    New in v5: cPanel Reseller access to per reseller configurable
options Unblock, Deny, Allow and Search IP address blocks
    New in v5: System Statistics - Basic graphs showing the performance
of the server, e.g. Load Averages, CPU Usage, Memory Usage, etc
    ...lots more!

> 
> Sorry als ik wat kritisch over kom, maar ik ben heel tevreden met Shorewall en heb nog maar heel
> weinig gezien dat ik niet ook met Shorewall kan.
Hierboven zie je wat shrorewall allemaal NIET doet. Shorewall voldoet
niet voor bruteforeces etc, portscans etc.

> Kun je de installatie van CSF op Zimbra afmaken zodat we daar kunnen zien wat het doet?
Draait standaard config.

We kunnen de csf's clusteren, waardoor ze geblockte ip's sharen e.d.