New DoS

If you have not already seen it, experiences it, or read about it, working to head off another reflection DOS vector. This time it is memcached on port 11211 UDP & TCP. There are active exploits using these ports. Reflection attacks and the memcached is not new. We know how reflection attacks work (send a spoofed packet to a device and have it reflected back (yes please deploy source address validation and BCP 38).

Operators are asked to review their networks and consider updating their Exploitable Port Filters (Infrastructure ACLs) to track or block UDP/TCP port 11211 for all ingress and egress traffic. If you do not know about iACLs or Explorable port filters, you can use this white paper details and examples from peers on Exploitable Port Filters:

http://www.senki.org/operators-security-toolkit/filtering-exploitable-ports-and-minimizing-risk-to-and-from-your-customers/

Enterprises are also asked to update their iACLs, Exploitable Port Filters, and Firewalls to track or block UDP/TCP port 11211 for all ingress and egress traffic.

Deploying these filters will help protect your network, your organization, your customers, and the Internet.

This should help protect you if you add this to your firewall.

# new port 11211 DoS
/sbin/iptables -t filter -I INPUT -s 0.0.0.0/0 -p tcp --dport 11211 -j DROP
/sbin/iptables -t filter -I OUTPUT -s 0.0.0.0/0 -p tcp --dport 11211 -j DROP
/sbin/iptables -t filter -I FORWARD -s 0.0.0.0/0 -p tcp --dport 11211 -j DROP
/sbin/iptables -t filter -I INPUT -s 0.0.0.0/0 -p udp --dport 11211 -j DROP
/sbin/iptables -t filter -I OUTPUT -s 0.0.0.0/0 -p udp --dport 11211 -j DROP
/sbin/iptables -t filter -I FORWARD -s 0.0.0.0/0 -p udp --dport 11211 -j DROP

 

Freedos

Ron PD1ACF wees me op deze website. Ziet er goed uit, het is zeker de moeite waard om even op de website te kijken. http://www.freedos.org

FreeDOS is a complete, free, DOS-compatible operating system that you can use to play classic DOS games, run legacy business software, or develop embedded systems. Any program that works on MS-DOS should also run on FreeDOS. (bron http://www.freedos.org)

MS-Dos 6.22 Files

MS-DOS 6.22

Hier kan je het complete MS-Dos 6.22 besturingssysteem downloaden.
Verder nog de Bootdisks.
Dos6.22 Bootdisk iso > DOS6.22_bootdisk.iso
Dos6.22 automatic bootdisk > Dos6.22.exe
Dos6.22 IMG > Dos6.22.img

ATTRIB.EXE 11,208 Application 05/31/1994 06:22:00 AM
AUTOEXEC.BAT 45 MS-DOS Batch File 05/26/1999 04:45:20 PM
C.BAT 34 MS-DOS Batch File 07/20/1998 10:11:42 AM
CD1.SYS 34,262 System file 09/26/1996 05:13:04 PM
CD2.SYS 16,504 System file 11/21/1996 01:54:00 AM
CD3.SYS 19,984 System file 08/13/1996 01:03:02 AM
CD4.SYS 41,302 System file 05/11/1998 08:01:00 PM
CHKDSK.EXE 12,241 Application 05/31/1994 06:22:00 AM
COMMAND.COM 54,645 MS-DOS Application 05/31/1994 06:22:00 AM
CONFIG.SYS 377 System file 05/29/1999 12:20:38 PM
DELTREE.EXE 11,111 Application 05/31/1994 06:22:00 AM
DOSKEY.COM 5,861 MS-DOS Application 05/31/1994 06:22:00 AM
DRVSPACE.BIN 66,294 BIN File 05/31/1994 06:22:00 AM
EDIT.EXE 69,662 Application 10/17/1994 00:00:00 AM
EDIT.HLP 17,898 Help File 05/31/1994 06:22:00 AM
EDIT.INI 192 Configuration Settings 03/12/1995 05:57:26 PM
EMM386.EXE 120,926 Application 05/31/1994 06:22:00 AM
FDISK.EXE 29,336 Application 05/31/1994 06:22:00 AM
FIND.EXE 6,770 Application 05/31/1994 06:22:00 AM
FORMAT.COM 22,974 MS-DOS Application 05/31/1994 06:22:00 AM
HIMEM.SYS 29,136 System file 05/31/1994 06:22:00 AM
IO.SYS 40,774 System file 05/31/1994 06:22:00 AM
LABEL.EXE 9,390 Application 05/31/1994 06:22:00 AM
MEM.EXE 32,502 Application 05/31/1994 06:22:00 AM
MOUSE.@@@ 7 @@@ File 07/06/1997 06:51:06 PM
MOUSE.COM 56,408 MS-DOS Application 03/10/1993 06:00:00 AM
MOUSE.INI 28 Configuration Settings 04/11/1997 01:50:40 AM
MOUSE.SYS 31,701 System file 05/01/1990 03:00:00 AM
MSCDEX.EXE 25,361 Application 05/31/1994 06:22:00 AM
MSDOS.SYS 38,138 System file 05/31/1994 06:22:00 AM
QBASIC.EXE 194,309 Application 05/31/1994 06:22:00 AM
QBASIC.HLP 130,881 Help File 05/31/1994 06:22:00 AM
RESTORE.EXE 38,342 Application 05/31/1994 06:22:00 AM
SCANDISK.EXE 124,262 Application 05/31/1994 06:22:00 AM
SCANDISK.INI 6,920 Configuration Settings 05/31/1994 06:22:00 AM
SETVER.EXE 12,015 Application 05/31/1994 06:22:00 AM
SHARE.EXE 10,912 Application 05/31/1994 06:22:00 AM
SYS.COM 9,432 MS-DOS Application 05/31/1994 06:22:00 AM
TREE.COM 6,945 MS-DOS Application 05/31/1994 06:22:00 AM
UNDELETE.EXE 26,416 Application 05/31/1994 06:22:00 AM
UNDELETE.INI 235 Configuration Settings 02/23/1995 07:36:44 AM
UNFORMAT.COM 12,738 MS-DOS Application 05/31/1994 06:22:00 AM
XCOPY.EXE 16,930 Application 05/31/1994 06:22:00 AM