closing open ports Post: 7556

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firewall vs. closing ports

This may be kind of a stupid question, but here goes: Say I'm running a FreeBSD webserver (w/apache). I've managed to close ALL open ports (including SSH/telnet and portmapper), excepting '80' that apache is listening on. A netstat -a shows me nothing open. Discounting DoS/DDoS or holes in...

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i have a text file i.e file1.txt which shows open ports on particular system. i have another text file i.e file2.txt which shows a list of allowed ports on a system. for eg: file2.txt 22/tcp ssh 23/tcp telnet. can i have a script which would compare these text files ,file1 and file2 ...

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Closing open file descriptors from /proc/pid/fd

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LEARN ABOUT CENTOS

tapset::tcp

tapset::tcp(3stap)														tapset::tcp(3stap)

NAME

       tapset::tcp - systemtap tcp tapset

DESCRIPTION

	This family of probe points is used to probe events that occur in the TCP layer,

       tcp.sendmsg
	      Sending a tcp message

	       See probe::tcp.sendmsg(3stap)
	       for details.

       tcp.sendmsg.return
	       Sending TCP message is done

	       See probe::tcp.sendmsg.return(3stap)
	       for details.

       tcp.recvmsg
	      Receiving TCP message

	       See probe::tcp.recvmsg(3stap)
	       for details.

       tcp.recvmsg.return
	      Receiving TCP message complete

	       See probe::tcp.recvmsg.return(3stap)
	       for details.

       tcp.disconnect
	      TCP socket disconnection

	       See probe::tcp.disconnect(3stap)
	       for details.

       tcp.disconnect.return
	      TCP socket disconnection complete

	       See probe::tcp.disconnect.return(3stap)
	       for details.

       tcp.setsockopt
	      Call to setsockopt()

	       See probe::tcp.setsockopt(3stap)
	       for details.

       tcp.setsockopt.return
	       Return from setsockopt()

	       See probe::tcp.setsockopt.return(3stap)
	       for details.

       tcp.receive
	      Called when a TCP packet is received

	       See probe::tcp.receive(3stap)
	       for details.

SEE ALSO

	  probe::tcp.sendmsg(3stap),	  probe::tcp.sendmsg.return(3stap),	 probe::tcp.recvmsg(3stap),    probe::tcp.recvmsg.return(3stap),
       probe::tcp.disconnect(3stap),  probe::tcp.disconnect.return(3stap),  probe::tcp.setsockopt(3stap),   probe::tcp.setsockopt.return(3stap),
       probe::tcp.receive(3stap),  stap(1), stapprobes(3stap)

IBM
									---							tapset::tcp(3stap)