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Full Discussion: Blocking a Single IP
Top Forums UNIX for Dummies Questions & Answers Blocking a Single IP Post 70111 by Phobos on Tuesday 26th of April 2005 12:23:37 AM
Old 04-26-2005
Blocking a Single IP
Hello,
My problem thus follows:
I am running a server which allows users to connect on UDP, not TCP.
There is a certain hacker, whom I have the IP of, who keeps crashing the server. I simply want to block him from accessing my box at all. I added him to the hosts.deny file, but am not sure if this will do the trick. (Since it seems that hosts.deny,allow is for NFS) Is there a better way to accomplish this?

Thank you,
Robert
 

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LEARN ABOUT DEBIAN

gnunet-nat-server

GNUNET-NAT-SERVER(1)					      General Commands Manual					      GNUNET-NAT-SERVER(1)

NAME

       gnunet-nat-server - help GNUnet setup test network setup with NAT

SYNOPSIS

       gnunet-nat-server [options] PORT

DESCRIPTION

       Normal  GNUnet end-users should not concern themselves with gnunet-nat-server.  In fact, distributions are encouraged to consider not ship-
       ping it at all.	Running gnunet-nat-server's is similar to running hostlist servers: it is a special service to the community with  special
       requirements and no benefit to those running the service.

       This  program  will listen on the specified PORT for incoming requests to test a peer's network connectivity.  Incoming requests can ask it
       to connect to a given IPv4 address (and port) using TCP or UDP and to send a 2-byte test message using the specified address.  The  program
       can  also  be asked to send a "fake" ICMP response message to a given IPv4 address (for autonomous NAT traversal --- see the description in
       the respective research paper).

       The idea is that gnunet-nat-server will be run on some trusted hosts with unrestricted connectivity to allow GNUnet  users  to  test  their
       network	configuration.	 As  written, the code allows any user on the Internet to cause the gnunet-nat-server to send 2-bytes of arbitrary
       data to any TCP or UDP port at any address.  We believe that this is generally harmless.

       When running gnunet-nat-server, make sure to use a configuration that disables most NAT options but enables  'enable_nat_client'  and  sets
       'internal_address'  to  the  global  IP address of your local host.  Also, the gnunet-helper-nat-client should be installed locally and run
       with root privileges (SUID), otherwise the gnunet-nat-server will not work properly.

       Note that gnunet-nat-server could be run via gnunet-arm but typically is not.  Also, the name of the host and port  that  gnunet-nat-server
       is  run on should be specified in the NATSERVER option in the [setup] section of the configuration file of hosts that are supposed to auto-
       configure with this server.

OPTIONS

       -c FILENAME,  --config=FILENAME
	      Use the configuration file FILENAME.

BUGS

       Report bugs by using Mantis <https://gnunet.org/bugs/> or by sending electronic mail to <gnunet-developers@gnu.org>

SEE ALSO

       gnunet-transport(1)

GNUnet								    25 Feb 2012 					      GNUNET-NAT-SERVER(1)
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