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ÕûÀíÈË: williamlong(2001-11-27 15:31:35), Õ¾ÄÚÐżþ
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I. ½éÉÜ  

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2  ??.kpnbelgium.be (194.119.225.185)  129.111 ms  138.566 ms  118.877 ms  
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...  
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20  fddi0-0.chw1.sydney.telstra.net (139.130.36.227)  509.930 ms  519.879 ms    
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IV. ÓÃPerlʵÏÖÔ¶³ÌϵͳµÄ̽²âµÄ·½·¨  



1. Telnetd »á»°Ð­ÉÌ(TSN)ºÍTelnetÑ¡Ïî¡£  

ÕâÏî¼¼ÊõÉæ¼°µ½Ô¶³ÌϵͳÉÏÔËÐеÄtelnetd£¬ÔÊÐíÄãÈ¥Á¬½Ó¡£µ±ÓëtelnetdµÄ  
socketÁ¬½Ó³õʼ»¯Íê³Éºó£¬ÎÒÃÇÖ´ÐÐsysread()²Ù×÷À´ÊÕ¼¯telnet»á»°µÄЭÉÌ  
Ö¸ÎÆÐÅÏ¢¡£Õâ¸öÖ¸ÎÆ¿´ÆðÀ´»áÊÇÕâÑùµÄ£º  


Linux <= 2.2.16 : ÿý^Xÿ?ÿ?ÿ?


ΪÁËʹÓÃtelnetÊØ»¤½ø³ÌÀ´È·¶¨²Ù×÷ϵͳ£¬ÎÒÃÇÐèÒªÖªµÀÔÚtelnet.hÖж¨Òå
µÄTELOPT£¨TelnetÑ¡ÏµÄ˳Ðò¡£³ýÁ˸ö±ðÀý´¦£¬Ã¿¸ö²Ù×÷ϵͳÓÐËü×Ô¼ºµÄ
˳Ðò¡£

Ò»µ©ÎÒÃǵõ½ÎÒÃǵÄÖ¸ÎÆÐÅÏ¢£¬ÎÒÃDZØÐëÊ×ÏȰÑËüת»»ÎªÊ®½øÖƵÄÊý£¨£±£­
£²£µ£µ£©£¬È»ºó¸÷×ԵذÑÊ®½øÖÆÖµºÍËüÏàÓ¦µÄTELOPTÖµÏëÆ¥Åä¡£


Ascii Öµ : ÿý^Xÿ?ÿ?ÿ?
Ê®½øÖÆÖµ : 255 253 24 255 253 32 255 253 35 255 253 39
Telopts Öµ : IAC DO TELOPT_TTYPE IAC DO TELOPT_LINEMODE IAC DO TELOPT_XDISPLOC IAC DO

TELOPT_NEW_ENVIRON


ËäÈ»ÕâЩTELOPTÖµ¿ÉÒÔÔÚ /usr/include/arpa/telnet.h ÖÐÕÒµ½£¬µ«ÎÒÒ²°Ñ
ËüÃǷŵ½ÁËÏÂÃæ£¬ÕâÑùÈç¹ûÄãÏë×öһЩ telnetdÖ¸ÎÆ¼ì²éµÄʱºò¿ÉÒÔÓõ½£º


/* telnet protocol definitions */

255 IAC /* interpret as command: */
254 DONT /* you are not to use option */
253 DO /* please, you use option */
252 WONT /* I won't use option */
251 WILL /* I will use option */
250 SB /* interpret as subnegotiation */
249 GA /* you may reverse the line */
248 EL /* erase the current line */
247 EC /* erase the current character */
246 AYT /* are you there */
245 AO /* abort output--but let prog finish */
244 IP /* interrupt process--permanently */
243 BREAK /* break */
242 DM /* data mark--for connect. cleaning */
241 NOP /* nop */
240 SE /* end sub negotiation */
239 EOR /* end of record (transparent mode) */
238 ABORT /* Abort process */
237 SUSP /* Suspend process */
236 xEOF /* End of file: EOF is already used... */


/* telnet options */

0 TELOPT_BINARY /* 8-bit data path */
1 TELOPT_ECHO /* echo */
2 TELOPT_RCP /* prepare to reconnect */
3 TELOPT_SGA /* suppress go ahead */
4 TELOPT_NAMS /* approximate message size */
5 TELOPT_STATUS /* give status */
6 TELOPT_TM /* timing mark */
7 TELOPT_RCTE /* remote controlled transmission and echo */
8 TELOPT_NAOL /* negotiate about output line width */
9 TELOPT_NAOP /* negotiate about output page size */
10 TELOPT_NAOCRD /* negotiate about CR disposition */
11 TELOPT_NAOHTS /* negotiate about horizontal tabstops */
12 TELOPT_NAOHTD /* negotiate about horizontal tab disposition */
13 TELOPT_NAOFFD /* negotiate about formfeed disposition */
14 TELOPT_NAOVTS /* negotiate about vertical tab stops */
15 TELOPT_NAOVTD /* negotiate about vertical tab disposition */
16 TELOPT_NAOLFD /* negotiate about output LF disposition */
17 TELOPT_XASCII /* extended ascii character set */
18 TELOPT_LOGOUT /* force logout */
19 TELOPT_BM /* byte macro */
20 TELOPT_DET /* data entry terminal */
21 TELOPT_SUPDUP /* supdup protocol */
22 TELOPT_SUPDUPOUTPUT /* supdup output */
23 TELOPT_SNDLOC /* send location */
24 TELOPT_TTYPE /* terminal type */
25 TELOPT_EOR /* end of record */
26 TELOPT_TUID /* TACACS user identification */
27 TELOPT_OUTMRK /* output marking */
28 TELOPT_TTYLOC /* terminal location number */
29 TELOPT_3270REGIME /* 3270 regime */
30 TELOPT_X3PAD /* X.3 PAD */
31 TELOPT_NAWS /* window size */
32 TELOPT_TSPEED /* terminal speed */
33 TELOPT_LFLOW /* remote flow control */
34 TELOPT_LINEMODE /* Linemode option */
35 TELOPT_XDISPLOC /* X Display location */
36 TELOPT_OLD_ENVIRON /* Old - Environmental variables */
37 TELOPT_AUTHENTICATION /* Authenticate */
38 TELOPT_ENCRYPT /* Encryption option */
39 TELOPT_NEW_ENVIRON /* New - Environmental variables */
255 TELOPT_EXOPL /* extended options list */


µ±¶Ôtelnetd ½øÐÐÖ¸ÎÆÌ½²âµÄʱºò£¬Ó¦¸Ã¼ÇסÕâЩ¼ì²â·Ç³£ÒÀÀµÓÚÔÚÖ÷»úÉÏ
ĬÈϵÄtelnetd°²×°·½Ê½¡£Èç¹ûÄã²»ÊÇÔÚLinux»úÆ÷ÉÏÔËÐÐin.telnetd£¬ÄÇô
ÕâÖÖ·½·¨¿ÉÄÜ»áʹÄã¾õµÃÔËÐÐÁ˱ðµÄ²Ù×÷ϵͳ¶ø²»ÊÇʵ¼ÊµÄÔËÐеġ£

ÕâÊÇÎÒtelnetdÖ¸ÎÆÎļþµÄÒ»²¿·Ý£º


# daemon, daemon version, os, os version, architecture, fingerprint

# 3Com SuperStack_II Switch
,,3Com,,SuperStack_II Switch,ÿý^C,

# HP-UX B.10.20
,,HP-UX,B.10.20,HP 9000,ÿ?,

# Linux 2.2.9
,,Linux,2.2.9,x86,ÿý^Xÿ?ÿ?ÿ?,

# Cobalt Linux 3.0
,,Cobalt Linux,3.0,mips,ÿý^Xÿ?ÿ?ÿ?,


ÔÚÓÐЩʱºò£¬ÓÃÕâÖÖÖ¸ÎÆÌ½²â·½·¨ÎÒÃÇ¿ÉÄÜÅöÉÏÎÊÌ⣬¼¸¸ö²Ù×÷ϵͳ¿ÉÒÔÓÐ
ÏàͬÀàÐ͵ÄÖ¸ÎÆ£¬»áʹ²Ù×÷ϵͳµÄÇø·Ö±äµÃÀ§ÄÑ¡£µ±È»£¬ÓÐÎÊÌâ¾Í»áÓнâ¾ö
µÄ·½·¨¡£

³ýÁËÖ»ÊǶÔtelnetdÓÃsysread()ÊÕ¼¯ÐÅÏ¢£¬ÎÒÃÇ¿ÉÒÔ·¢ËÍtelnetÑ¡Ïî¸øÄ¿±ê
Ö÷»ú£¬ÊÕ¼¯ËüµÄ»ØÓ¦£¬ÓëÒ»¸öÖ¸ÎÆÊý¾Ý¿â½øÐбȶԡ£Í¨¹ý·¢ËÍÖîÈ磺
IAC/DO/DONT/WILL/WONT µÄÃüÁÎÒÃǾͻá¶Ôÿ¸ö²Ù×÷ϵͳÈçºÎ¶ÔÃüÁî×÷³ö
·´Ó¦ÓÐÒ»¸öÇå³þµÄÈÏʶ£¬Òò¶ø¶Ô¿ÉÄܵIJÙ×÷ϵͳÓÐÒ»¸ö±È½Ï׼ȷµÄ²Â²â¡£


½øÐÐTSNÖ¸ÎÆÌ½²âµÄÒ»¸öʾÀý´úÂ룺

--cut--


#!/usr/bin/perl
#
# TSN fingerprint example (by f0bic)
# usage: ./tsn <host> (telnetd-port)  
        # It is also possible to check for the DONT's  
        # instead of for the DO's.  
          
        use Socket;  
        $h=$ARGV[0];  
        $p="23" unless $ARGV[1];  
        socket(S, PF_INET, SOCK_STREAM, 6);  
        $iaddr=inet_aton($h);$paddr=sockaddr_in($p,$iaddr);  
        if(connect(S, $paddr)) {  
          sysread(S, $fprint, 200); # gathering telnetd fingerprint  
          print "\n[$h - connected]\n\nfingerprint: $fprint\n";  
          @ords = split(//, $fprint);print "ordinal: ";  
      foreach $tval (@ords){print ord($tval);print " ";} # ordinal  
      print "\n\n";  
        } else {  
        print "$host: cant connect!\n\n";  
        }  
      

--cut--  

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