2009 August | News, Reviews, Gadget Database

09Sep

SMTP Check Port 25 with the Telnet Command

For Example, if we want to sent email to suroboy.com, frist, we must know about MX for this domain :
# host -t mx suroboy.com
suroboy.com mail is handled by 0 suroboy.com.

# telnet suroboy.com 25
Trying 72.233.78.218…
Connected to suroboy.com.
Escape character is ‘^]’.
220-usa2.neoserver.net ESMTP Exim 4.69 #1 Fri, 04 Sep 2009 08:37:58 +0700
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.

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08Sep

Accessing your POP mail through TELNET

For checking email of suroboy@suroboy.com , for example, just telnet the pop server (mail.suroboy.com) port 110:
# telnet mail.suroboy.com 110
Trying 72.233.78.218…
Connected to suroboy.com.
Escape character is ‘^]’.
+OK Hello there.

Then type the user email :
user suroboy@suroboy.com
+OK Password required.

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06Sep

Tutorial Netstat

Netstat (NETwork STATistics) is a command-line tool that provides information about your network configuration and activity.
- To display the routing table:
#netstat -rn
-> -r : Kernel routing tables.
-> -n : Shows numerical addresses instead of trying to determine hosts.

- To display the quick interfaces statistics:
#netstat -i
-> -i : Interface
Continue Reading Tutorial Netstat

04Sep

Tutorial TCPdump

TCPdump is a very powerful command line interface packet sniffer.
1. Install TCPDUMP
- To install TCPdump :
#apt-get install tcpdump

- To see the TCPdump dependencies:
#apt-cache depends tcpdump
tcpdump
Depends: libc6
Depends: libpcap0.8
Depends: libssl0.9.8

- To see the installed TCPdump version:
# apt-cache policy tcpdump
tcpdump:
Installed: 3.9.5-2etch1
Candidate: 3.9.5-2etch1
Version Table:
*** 3.9.5-2etch1 0
500 http://kambing.vlsm.org stable/main Packages
500 http://security.debian.org stable/updates/main Packages
100 /var/lib/dpkg/status
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21Aug

ipgrab Tutorial

Ipgrab is a network debugging utility not unlike tcpdump except that it prints out detailed header field information for data link, network and transport layers.

Install ipgrab in debian

#apt-get install ipgrab

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20Aug

jnettop Tutorial

jNettop captures traffic comming across the host it is running on and displays streams sorted by bandwidth they use. Result is a nice listing of communication on network by host and port, how many bytes went through this transport and the bandwidth it is consuming.

Install jnettop in debian

#apt-get install jnettop

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18Aug

Knocker Tutorial

Knocker is a new, simple, and easy to use TCP security port scanner written in C, using threads. It is able to analyze hosts and the network services which are running on them.

Install knocker