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RXN Communications offers Internet Access to RXN Customers. The following are answers to Frequently Asked Questions (FAQ) about the Internet and Internet Access. Please direct any additional questions you may have to support@rxn.com .
RXN Internet FAQ - Q uestion and A nswer Table of Contents:
| Q | 1. What is the Internet? |
| A |
"The Internet is a collection of thousands of networks linked by a common
set of technical protocols which make it possible for users of any one of
the networks to communicate with or use the services located on any of the
other networks." -- from
RFC
1594 FYI Q/A - for New Internet Users
.
$Id: 1,v 1.2 2000/01/05 03:24:37 rjd Exp $ |
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| Q | 2. How can I learn more about the Internet? |
| A |
Although the best way to learn about the Internet may be to explore it
first-hand, the following documents can provide a good overview:
$Id: 2,v 1.3 2000/01/05 05:16:38 rjd Exp $ |
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| Q | 3. Who organizes the Internet? |
| A |
Everybody and nobody could both be the correct answer! The following
organizations attempt to organize various aspects of the Internet:
$Id: 3,v 1.2 2000/07/21 03:19:57 rjd Exp $ |
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| Q | 4. What does the Internet look like? |
| A |
Several attempts have been made to visually represent the Internet by
graphing various performance attributes or measures.
$Id: 4,v 1.1 2000/01/05 03:26:35 rjd Exp $ |
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| Q | 5. How busy is the Internet today? |
| A |
Several attempts have been made to measure the instantaneous latency, or
delay, on the internet.
$Id: 5,v 1.1 2000/01/05 03:27:08 rjd Exp $ |
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| Q | 6. How can I learn more about Site Security on the Internet? |
| A |
Site Security has, unfortunately, become an important concern on the
internet. The following documents review basic security concerns:
The following sites offer additional Security information:
$Id: 6,v 1.2 2000/01/05 05:06:03 rjd Exp $ |
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| Q | 7. How can I learn more about Security Policies on the Internet? |
| A |
Sites on the internet need to create a coherent Internet-specific
information security policy. The
NIST Computer Security Resource Clearinghouse
provides an
Internet Security Policy: A Technical Guide
as a starting point.
$Id: 7,v 1.1 2000/01/05 04:27:24 rjd Exp $ |
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| Q | 8. How can I learn more about Computer Viruses on the Internet? |
| A |
Computer Viruses have, unfortunately, become an important concern on the
internet. The following sites offer additional information:
$Id: 8,v 1.3 2000/07/28 04:29:42 rjd Exp $ |
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| Q | 9. How can I learn more about Cryptography on the Internet? |
| A |
Cryptography has many applications on the internet today, from the
protection of documents to the securing of online transactions. The
following sites offer additional information:
$Id: 9,v 1.1 2000/06/25 12:35:02 rjd Exp $ |
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| Q | 10. How can I learn more about Smurf or Fraggle Amplifier Defense? |
| A |
A good
summary
can be found at the
Internet Security Systems
site, cached here on 14 mar 2004:
Additionally, the following approaches can be used:Amplifier Defense In order to prevent your site from "bouncing" smurf/fraggle packets, you must turn off "directed broadcasts" on the router leading to the target subnet. A directed broadcast looks something like 192.0.2.255, which would tell the router leading to the 192.0.2.x subnet to broadcast the packet to all devices on that subnet. Cisco Use the command "no ip directed-broadcast" Proteon Configure "disable directed-broadcast" Nortel/Bay Configure an incorrect static ARP address for broadcast address WinNT Configure an incorrect static ARP address for the broadcast address. Example: arp -s 192.0.2.255 00-00-00-00-00-00 Linux Configure an incorrect static ARP address for the broadcast address. Example: arp -s 192.0.2.255 00:00:00:00:00:00 If using a host as a router, then the simplest method is to create a static mapping for the ARP table that forces packets directed at the broadcast address to be sent to a non-existent MAC address (such as 000000000000). Most routers today allow for firewall-style packet filters. These can also be used to deny access to the broadcast address. Another defense would be to disable response by hosts. According to the host requirements RFC, an ICMP Echo Request sent to the a broadcast address MAY be discarded. WinNT, Win98, Win2k By default, these do not respond to pings sent to the broadcast address. FreeBSD After 2.2.5, it does not respond NetBSD sysctl -w net.inet.ip.directed-broadcast=0 AIX 4.x no -o bcastping=0 # disable bcast ping responses (default) Solaris Add to /etc/rc2.d/S69inet.startup the line ndd -set /dev/ip ip_respond_to_echo_broadcast 0 ipfw ipfwadm -I -a deny -P icmp -D 192.0.2.255 -S 0/0 0 8 BSD/OS 4.1 within /etc/rc.local: echo -n "icmp broadcast: "; sysctl -w net.inet.icmp.bmcastecho=0 Catalyst 2950T-24 enable $Id: 1,v 1.2 2000/01/05 03:24:37 rjd Exp $ |
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| Q | 11. How can I keep my own computer safe on the internet? |
| A |
Sadly, today, it takes work and diligence to keep your computer safe on
the internet. Here are some basic steps...
Anti-Virus Software: It is important to have a current, updated, anti-virus software scanner running. Many anti-virus software solutions are available. All attempt to prevent virial scripts and programs from doing damage to your computer and files. One example is Grisoft AVG Anti-Virus. Anti-Spybot Software: It is important to have a current, updated, anti-spybot software scanner running. Many anti-spybot software solutions are available. One example is Spybot Search and Destroy. Firewall: It is important to have a current, updated firewall in place. Many hardware and software firewalls are available. If a hardware firewall is not available through your router, use a software firewall frequently bundled with your OS. Current Operating System Patches: It is important to have a current, updated patches applied to your operating system. Stay up to date with all patches and updates! $Id: 11,v 1.1 2007/07/21 22:19:04 rjd Exp $ |
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DISCLAIMER: This FAQ is provided as is without any expressed or implied warranties. While every effort has been taken to ensure the accuracy of the information contained in this FAQ, the maintainer assumes no responsibility for errors or omissions, or for damages resulting from the use, or misuse, of the information contained herein.
