UCE DOS ( )

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1 Linux Linux (JLA)

2 UCE DOS ( )

3

4 Linux Linux

5 Linux? OS Intel PC Sparc PowerPC.. PC note

6 Linux Linux : :

7 ? update Trinux

8 (?)

9 X X canna,wnn,..

10 (2) svgalib,fb,gtk,qt... NFS,RPC,NIS portmapper(/sbin/portmap) inetd finger talkd

11 Linux bash static link sash static link

12 history XFS (from SGI)? ext3,afs.. NFS knfsd

13 Vine Linux Plamo Linux redhat Debian GNU/Linux Securityfocus

14 linux

15 40 SCSI NFS SMB NCP CDROM,ISDN

16 SCSI CDROM NIC a.out NFS SMB NCP appletalk CONFIG_FIREWALL

17 /proc /proc/sys/kernel/file-max /proc/sys/kernel/inode-max /proc/sys/vm/freepages

18 TCP syn flood TCP hand shake CONFIG_SYN_COOKIES=y /proc/sys/net/ipv4/tcp_syncookies 1

19 (kernel traffic) (Alan Cox s Diary)

20

21 ?.. /file

22 ident /etc/rc3.d

23 login

24 (/etc/passwd) /etc/shadow DES MD5,SHA1 PAM

25 promisc mode NIC OTP

26 telnet ftp POP IMAP

27 telnet r login login.rhosts

28 OTP( ) OPIE telnet,ftp OTP /etc/opiekeys MD5

29 APOP OTP POP

30 SSH(Secure Shell) RSA f-secure OpenSSH

31 OTP SSH OTP: OTP windows mac PDA OTP SSH: r

32 OTP SSH OTP: SSH:?

33 tcp-wrapper(libwrap) ipchains

34 tcp-wrapper /usr/sbin/tcpd /etc/hosts.allow /etc/hosts.deny libwrap man 5 hosts_access safe_finger

35 /etc/hosts.allow ALL: ALL: ALLOW ALL: / : ALLOW ALL: ALL: DENY imapd: / : ALLOW in.ftpd: ALL: ALLOW ALL: ALL: DENY

36 ( ) tftp,finger,portmapper,nbt,snmp,exec,login,shell,x

37 ipchains? input,output,forward source,dist.,protocol,interface IP

38 ipchains filtering router NAPT tcp_wrapper NAPT+cipe VPN

39 ipchains IP ( )

40 /file inetd.conf, nobody www : skkserv stream tcp nowait nobody /usr/sbin/tcpd /usr/sbin/dbskkd-cdb

41 chroot directory wu-ftpd

42

43 root root world writable? umask immutable

44 (2) nodev,nosuid,noexec setuid setuid?

45 (3) shell /etc/inittab ctl-alt-del

46 sudo root root : web apache restart :

47 PAM : DES login /etc/pam.d/ chfn chsh kbdrate linuxconf login other passwd ssh su sudo wu-ftpd

48 DoS /* */

49 Linux? PC PC Linux

50 ( ) Linux UPS APC(apcupsd ) (FREQUPS )

51 UCE Linux Mail DOS network scan

52 ? RFC2142 abuse,postmaster,hostmaster,... JPCERT/CC ISP

53

54 Disk

55 ps top df

56 init-+-apmd -atd -bash---startx---xinit-+-xf86_svga -sawmill-+-kterm---bash-+-bash---emacs -gqmpeg---mpg123---mpg123 -mgp2ps---pstree -xv -cardmgr -cron -dhcpcd -5*[getty] -inetd---dbskkd-cdb -kflushd -klogd -kpiod -kswapd -kupdate -lockd -master-+-pickup -qmgr -named pstree

57 mon DNS,www,ping,ntp... SNMP uptime,...

58 mon(2) www

59 /

60 syslog /etc/syslog.conf cyclog : syslog

61 log web ftp log log iplogger TCP, UDP, ICMP

62 port

63 syslog-summary Xlogmaster GNU tool, GTK+ /proc syslog

64 swatch /authentication failure/ echo,mail swatch -c /etc/swatch/auth -t /var/log/auth.log

65 log MTA : sendmail -- syslog_stats.pl postfix -- pflogsumm.pl qmail -- qmailanalog www : analog webalizer ftpd : xferstats

66 tripwire DB

67 network promisc / iptraf tcpdump

68 network (2) NFR(Network Fright Recorder) ( ) JAVA

69 CD-R MO( ) HDD

70 /etc /home

71 /

72 (2)

73

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