$fping 192.168.0.1 192.168.0.1 is alive $fping 192.168.0.2 ICMP Host Unreachable from 192.168.0.103 for ICMP Echo sent to 192.168.0.2 ICMP Host Unreachable from 192.168.0.103 for ICMP Echo sent to 192.168.0.2 ICMP Host Unreachable from 192.168.0.103 for ICMP Echo sent to 192.168.0.2 ICMP Host Unreachable from 192.168.0.103 for ICMP Echo sent to 192.168.0.2 192.168.0.2 is unreachable $fping …
Tag Archives: network
nmap – Network exploration tool and security / port scanner
commandline session $nmap –reason 127.0.0.1 Starting Nmap 6.00 ( http://nmap.org ) at 2013-09-06 21:58 IST Nmap scan report for localhost.localdomain (127.0.0.1) Host is up, received conn-refused (0.0013s latency). Not shown: 995 closed ports Reason: 995 conn-refused PORT STATE SERVICE REASON 22/tcp open ssh syn-ack 25/tcp open smtp syn-ack 111/tcp open rpcbind syn-ack 389/tcp open ldap …
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How to make tcpdump output without address to name conversion ?
ABOUT tcpdump tcpdump is a common packet analyzer that runs under the command line. It allows the user to display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.[3] Distributed under the BSD license,[4] tcpdump is free software. Tcpdump works on most Unix-like operating systems: Linux, Solaris, …
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IP Puzzles +
Amidst the traffic of the Internet is an enormous amount of undesirable communication. Currently there is no significant disincentive for clients who contribute to this flood of undesirable communication. A mechanism for punishing only the malicious is required in order to discourage clients from behaving badly. The standard response has been to disconnect clients exhibiting …
out-of order data…
$cat /proc/sys/net/ipv4/tcp_reordering 3 $ tcp_reordering – INTEGER Maximal reordering of packets in a TCP stream. Default: 3 proj-rep/kernel_code/tcp_ipv4.c 1921: tp->reordering = sysctl_tcp_reordering; 1922: nms.csail.mit.edu/~kandula/data/tcp-mult.tgz – Unknown – C irestarter-0.9.0/src/netfilter-script.c 271: fprintf (script, “# Set TCP Re-Ordering value in kernel to ‘5’\n”); 272: fprintf (script, “if [ -e /proc/sys/net/ipv4/tcp_reordering ]; then\n” 273: ” echo 5 > …