NTA Monitor

Latest News

New version of network scanning tool arp-scan released

15th March 2011 A new version of a respected and popular network scanning tool has been released. Read More

Tests show rise in number of vulnerabilities affecting web applications with SQL Injection and XSS most common flaws

1st March 2011 SQL injection and cross-site scripting (XSS) were the most common flaws found in web applications in 2010 according to results from tests carried out by NTA Monitor. Read More

Assess risk to manage effects of budget cuts

9th February 2011 Signs of economic recovery may be appearing in some industries, but for most organisations - particularly in the public sector - budget cuts and cost savings are here to stay for the foreseeable future. Read More

"Basic security threats not changed in 15 years"

1st February 2011 There may have been significant technological advances to the hardware and software organisations use, but according to Roy Hills, who co-founded NTA Monitor in 1996, the basic security threats have not changed in the last 15 years. 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