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At the moment whois lookups trigger reboots on Alpine 3.1 & 3.2 so
I don't think it's related to the new OpenRC version. Have raised an
issue on github.
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psad-2.4.1 (05/13/2015):
- Bug fix to honor the IGNORE_PROTOCOLS configuration variable for
non-tcp/udp/icmp protocols. This bug was reported by Paul Versloot.
Also extended the IGNORE_PROTOCOLS feature to match on both protocol
name and number as well regardless of what iptables reports within log
messages. This is so the user does not have to know what iptables will
report (which can be inconsistent, e.g. 'TCP' vs. '2' for IGMP).
- Added two configuration variables ENABLE_WHOIS_LOOKUPS and
ENABLE_DNS_LOOKUPS (set to 'Y' by default) to allow whois and reverse
DNS lookups to be controlled from the command line.
- Bug fix for an uninitialized variable in 'psad -L' mode when auto
blocking is enabled. This bug was reported via github issue #19 by
gihub user 'itoffshore'.
(the last bug was also fixed by updating the dependent perl modules which we
have already done).
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The 2.2.4 PSAD package in the repos has no files (only folders) if
you examine the apk.
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Version bump to PSAD 2.2.3
ChangeLog
psad-2.2.3 (03/01/2014):
- Added compatibility with 'upstart' init daemons with assistance from Tim
Kramer. This change adds a new config variable 'ENABLE_PSADWATCHD' that
can be used to disable psadwatchd when deployed with upstart since it
has built-in process monitoring and restarting capabilities. By default
psadwatchd is not enabled anymore since this variable is set to "N". The
reason for this change is that psad is extremely stable and so almost
never needs to be restarted in practice, and process monitoring is
better provided via other solutions (like upstart) anyway. In addition,
a new init script located at init-scripts/upstart/psad.conf has been
added that is compatible with upstart - this script is meant to be copied
to the /etc/init/ directory.
- (Wolfgang Breyha) Bug fix to allow VLAN interfaces and interface aliases
in IGNORE_INTERFACES. This fixes issue #8 on github.
- Bug fix to not modify /etc/hosts.deny permissions when removing
tcpwrappers auto-block rules. This issue was reported as Debian bug
#724267 (http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=724267) and
relayed via Franck Joncourt. Closes issue #7 on github.
psad-2.2.2 (01/13/2014):
- Added detection for Errata Security's "Masscan" port scanner that was
used in an Internet-wide scan for port 22 on Sept. 12, 2013 (see:
http://blog.erratasec.com/2013/09/we-scanned-internet-for-port-22.html).
The detection strategy used by psad relies on the fact that masscan does
not appear to set the options portion of the TCP header, and if the
iptables LOG rules that generate log data for psad are built with the
--log-tcp-options switch, then no options in a SYN scan can be seen.
This is not to say that other scanning software always sets TCP options -
Scapy seems to not set options by default when issuing a SYN scan like
this either: http://www.secdev.org/projects/scapy/doc/usage.html#syn-scans
There is a new psad.conf variable "EXPECT_TCP_OPTIONS" to assist with
Masscan detection as well. When looking for Masscan SYN scans, psad
requires at least one TCP options field to be populated within a LOG
message (so that it knows --log-tcp-options has been set for at least
some logged traffic), and after seeing this then SYN packets with no
options are attributed to Masscan traffic. All usual psad threshold
variables continue to apply however, so (by default) a single Masscan
SYN packet will not trigger a psad alert. Masscan detection can be
disabled altogether by setting EXPECT_TCP_OPTIONS to "N", and this will
not affect any other psad detection techniques such as passive OS
fingerprinting, etc.
- RPM bug fix to include the protocols file.
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Added start() to /etc/init.d/psad - it was not starting without it.
Added a dependency for mailx to APKBUILD & fixed /etc/psad/psad.conf setting for mail (ssmtp on it's own was not enough - mail was
incorrectly formed).
Tested on a live server - scans are detected, blocked & email notifications sent.
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Corrected patch for PSAD - the APKBUILD now provides the answers
required by install.pl so the package will build unattended. I looked
at building the package the Redhat way but the perl install script also
preserves configuration settings on upgrades.
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