NTA Monitor

Latest News

Who's listening in on your corporate network?

20th October 2008 VoIP systems putting companies at risk says NTA Monitor Read More

Finance industry faces serious IT security issues

23rd June 2008 The finance industry needs to keep its eye on the small change as well as the bigger picture of its security vulnerabilities Read More

Retail sector faces serious IT security issues

23rd June 2008 The retail sector needs to set out its stall and ring the changes in its security vulnerabilities if it is to avoid the potential for hackers to gain unauthorised system access and disrupt service availability Read More

IT managers have more security headaches to deal with

11th May 2008 NTA Monitor's 2008 Annual Security Report has revealed that the average number of vulnerabilities found per test have increased to 21 compared with 19 in 2007 Read More

Annotated tcpdump packet trace on hacker system

# Hacker -< Server:21 TCP Handshake

15:29:27.515279 195.102.196.156.1035 > 194.217.26.147.21: S 2701514772:2701514772(0)
15:29:27.701995 194.217.26.147.21 > 195.102.196.156.1035: S 895641944:895641944(0) ack 2701514773
15:29:27.702015 195.102.196.156.1035 > 194.217.26.147.21: . ack 1

# Server:21 -< Hacker "220 FTP server ready."

15:29:27.871904 194.217.26.147.21 > 195.102.196.156.1035: P 1:24(23) ack 1 15:29:27.871939 195.102.196.156.1035 > 194.217.26.147.21: . ack 24

# Hacker -< Server:21 "USER anonymous"

15:29:40.236820 195.102.196.156.1035 > 194.217.26.147.21: P 1:17(16) ack 24 15:29:40.445613 194.217.26.147.21 > 195.102.196.156.1035: . ack 17

# Server:21 -< Hacker "331 Guest login ok, send your complete e-mail..."

15:29:40.465603 194.217.26.147.21 > 195.102.196.156.1035: P 24:92(68) ack 17 15:29:40.485595 195.102.196.156.1035 > 194.217.26.147.21: . ack 92

# Hacker -< Server:21 "PASS rsh@"

15:29:47.540744 195.102.196.156.1035 > 194.217.26.147.21: P 17:28(11) ack 92

# Server:21 -< Hacker "230 Guest login ok, access restrictions apply"

15:29:47.701986 194.217.26.147.21 > 195.102.196.156.1035: P 92:140(48) ack 28 15:29:47.721976 195.102.196.156.1035 > 194.217.26.147.21: . ack 140

# Hacker -< Server:21 "PORT 195,102,193,28,38,148"

(195.102.193.28:9876) 15:30:13.461336 195.102.196.156.1035 > 194.217.26.147.21: P 28:56(28) ack 140

# Server:21 -< Hacker "200 PORT command successful."

15:30:13.609038 194.217.26.147.21 > 195.102.196.156.1035: P 140:170(30) ack 56 15:30:13.629016 195.102.196.156.1035 > 194.217.26.147.21: . ack 170

# Hacker -< Server:21 "LIST"

15:30:19.304577 195.102.196.156.1035 > 194.217.26.147.21: P 56:62(6) ack 170

# Server:21 -< Hacker "150 Opening ASCII mode data connection for..."

15:30:19.536058 194.217.26.147.21 > 195.102.196.156.1035: P 170:233(63) ack 62 15:30:19.556049 195.102.196.156.1035 > 194.217.26.147.21: . ack 233

# Server:21 -< Hacker "226 Transfer complete."

15:30:19.895884 194.217.26.147.21 > 195.102.196.156.1035: P 233:257(24) ack 62 15:30:19.915869 195.102.196.156.1035 > 194.217.26.147.21: . ack 257

# Hacker -< Server:21 "QUIT"

15:30:25.742806 195.102.196.156.1035 > 194.217.26.147.21: P 62:68(6) ack 257

# Server:21 -< Hacker "221-You have transferred..."

15:30:25.932862 194.217.26.147.21 > 195.102.196.156.1035: P 257:441(184) ack 68

# TCP Connection Shutdown

15:30:25.942866 194.217.26.147.21 > 195.102.196.156.1035: F 441:441(0) ack 68 15:30:25.942890 195.102.196.156.1035 > 194.217.26.147.21: . ack 442 15:30:25.943188 195.102.196.156.1035 > 194.217.26.147.21: F 68:68(0) ack 442 15:30:26.092781 194.217.26.147.21 > 195.102.196.156.1035: . ack 69