Unix tools track hackers
News When you execute the command tcpdump > outputfile on a shared network that is not switched and dumping to an output file, you'll see a timestamp, a source socket, a destination socket, a TCP flag, a sequence number and offset, and a maximum...
[October 1, 2002, 8:51]
Secure your DNS - replace BIND
News For me, the command is cd /home/slowe since the package is in my home directory.Expand the distribution with gunzip -dc ucspi-tcp-0.88.tar.gz | tar xvf -.Change to the expanded directory with cd ucspi-tcp-0.88.Compile the source code by typing...
[February 5, 2003, 9:32]
Improve Linux security
News And like other commonly used TCP/IP applications, telnet has a standard defined port number, 23, which is also the address of the running telnet server application. One of the attractions of Linux is its native support for a wide range of TCP/IP...
[October 8, 2002, 10:39]
PacketForward
Downloads It is a command line tool that listens on one network interface for UDP and TCP packets and then injects them on the same or another network interface. PakcetForward is an IP packet capture and forward application based on libpcap and libnet.
[March 12, 2009, 21:42]
NetScanTools Pro
Downloads Probe Ports on a target computer(s) for TCP services. Diagnose network connectivity problems with Ping, Traceroute, TCP Term, Echo and Chargen. Use TCP Term to test services on both standard and non-standard TCP ports.
[November 17, 2008, 8:46]
Improve TCP/IP performance in W2K registry
News Windows 2000 Server's TCP/IP Properties Sheet is a little deceptive in giving the impression that basic information, such as an IP address, subnet mask, default gateway, or DNS server, is all that's required to create connections.
[October 8, 2002, 14:24]
Samba flaw opens up root access attack
News In addition, the notice reports that Samba uses ports UDP/137 (nmbd), UDP/138 (nmbd), TCP/139 (smbd), and TCP/445 (smbd), which can be blocked at a firewall to protect servers against these vulnerabilities.
[April 7, 2003, 9:49]
Troubleshoot Windows 2000 DHCP server
News Reboot the failing workstation.Reinstall the TCP/IP stack on the failing workstation. If you get an address in the range 169.254.x.x on a Windows 2000 client, you'll know that the client was unable to obtain an IP address from the DHCP server.Try...
[January 21, 2003, 10:01]
Solve Windows 2000 DNS server problems
News At the user's workstation, you should run IPCONFIG /ALL from a command line to see whether the TCP/IP stack on the local machine is responding correctly. NSLOOKUP is a command line utility that allows you to query DNS server zone files.
[May 19, 2003, 13:03]
Mac OS X 10.2 Jaguar review
Reviews Plug in two Jaguar Macs to an Ethernet cable, for instance, and the systems configure their own TCP/IP addresses and locate each other in seconds. Windows servers now show up by name in the Connect To Server command of the Go menu.
[August 23, 2002, 11:43]
Troubleshooting the WLAN
News You should also verify the access point's TCP/IP configuration. Open a Command Prompt window on a PC on your wired network and ping your wireless access point's IP address. If you right-click on the wireless networking icon in the taskbar and...
[November 19, 2002, 11:02]
WS_FTP Professional 9.0 review
Reviews Similar to HTTP for transferring Web pages from a server to your browser, and SMTP for transferring email across the Internet, FTP uses TCP/IP protocols to enable data transfer. Additional security includes SFTP over SSH 2.0 for securing your data...
[August 4, 2004, 8:55]
Wiping the slate clean for Windows
News For example, how many home computer users really need to have NetBIOS enabled by default and accessible over TCP/IP? In fact, Microsoft just layered early Windows versions on top of MS-DOS and even OS/2 was more of a command-line operating system...
[November 25, 2005, 8:20]
