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Firewall Questions:
Trace Report Questions:
Firewall Questions: A: This depends upon how your firewall
/ NAT server is configured. Please ask your network
administrator if your firewall (or NAT server)
is configured to allow PING and TRACERT to work
(which use ICMP ECHO, ECHO REPLY, and TTL EXPIRED
packets). You can test this yourself by running
these programs on your computer (For example,
try "tracert www.visualware.com"). If
these programs work, VisualRoute should work
just fine on your computer. otherwise, your firewall
(or NAT server) will have to be reconfigured
by your network administrator to allow PING and
TRACERT to work before you can use VisualRoute. A: Most likely because you are running a personal firewall product, such as ZoneAlarm, McAfee Firewall, or Norton Internet Security (NIS FAQ), which is preventing VisualRoute from accessing the Internet. Please make sure that your security software is configured to allow VisualRoute access to the Internet. The VisualRoute components that need Internet access are:
Alternatively, changing the network properties
to point to an outside DNS server will resolve
the problem in some instances. A: Yes. In most cases NIS will prompt you to allow access for the programs below. If not you will need to allow access for the following VisualRoute program components.
A: Yes, although you will need to allow ICMP packets as described below. This is not necessary in v12 as this option was enabled by default.
Description: ICMP A: If you know that your Internet connection is working, the most likely problem is that personal firewall software installed on your computer, or a company wide firewall is blocking VisualRoute from access the Internet. For help with your personal firewall, look for the product name in bold after the questions above. For help on a company firewall, review the company firewall FAQ. A: Due to a problem in recent firmware
patches on some Linksys routers, VisualRoute
does not work correctly. The problem can be resolved
in most cased by flashing the router to an older
firmware. Many Linksys firmware versions may
be downloaded from ftp://ftp.linksys.com/pub/network/.
VisualRoute does work fine on the models/firmware
versions below: Java Questions: A: Visit the Java Support web page for complete details. If you need additional information please contact support. Trace Report Questions: A: Locations that are shown in regular type known locations, locations in italics indicate an estimate was made. Estimated locations are derived from network provider (ISP) information. A: For VisualRoute to work correctly you have have to set any firewall or proxy you have to accept all incoming/outgoing ICMP and open outgoing TCP port 43. Once this has been done VisualRoute should give a full list of locations and plot them on the map. On some occasions the location appears in purple which means VisualRoute is essentially guessing the location as it is not 100% sure. These locations will not be plotted on the map. There is an option in the preferences that states if the start/end A: Depending on the accuracy of the system clock, 'ms' numbers can be correct to 5ms - that applies to all programs. But there is a big difference between pinging an address, and having that address appear in the middle of a trace route. The difference is: a router which is being pinged has to directly respond to an ICMP packet (ICMP Echo Reply). A router which appears in the middle of a trace route is simply sending an error packet back, telling the sender the packet didn't get through (ICMP TTL Expired in Transit). The latter is considered low priority and so the router put it to the bottom of its 'to-do' list, ensuring that higher-priority tasks are completed first. That is the cause of the extra delay. General: A: Try resetting Internet Explorer integration. Exit Internet Explorer and then run VisualRoute. Under Options / Preferences, uncheck "Internet Explorer Integration". Exit VisualRoute. Go back into VisualRoute and check the option. Exit and restart VisualRoute. Run Internet Explorer. A: Links drawn in blue indicate known locations. Links drawn in purple indicate that a 'guess' was made. Guess locations are derived from network provider (ISP) information. A: TTL stands for Time To Live. All IP packets have a TTL field and as IP packets get passed around the Internet, this TTL value is decreased, usually by one at every hop. If this field ever gets down to zero, the IP packet is discarded and does not reach its destination. What this means to you is that if you ever try to connect to a site on the Internet that is at a hop level greater than your TTL, your connection will fail. The ICMP TTL Bug occurs in a TCP/IP stack when the incoming TTL value of a packet is not reset and sent out as the outgoing value (it should be initialized to some default value). A: Private Use networks incorporate IP addresses that are reserved for internal use. When a traceroute is run, the IP address will go through a IP management utility which will change the IP address to enable it to be used externally. In VisualRoute, for any hops on a private use network the geographical location will not be shown, as these use pseudo IP addresses. All the other hops should work, if there are no firewall's or proxy servers in place. A: Yes. Use ctrl-c for copy and ctrl-v on for paste. A: VisualRoute uses
ICMP which is not a protocol
that can be proxied so VisualRoute
will coexist and not interfere
with a proxy. In order for
VisualRoute to work through
a firewall VisualRoute will
require that ICMP the following
outbound and corresponding
inbound message types to be
enabled. A: Simply submit a Support Request and we will be pleased to help you implement VisualRoute or answer any questions you may have. A: VisualRoute will work under a Windows 2000/XP 'limited' account if the user is given read/write privileges to the install directory. A: This means that another server is awaiting incoming connections on the port that has been selected (default 80). This maybe be caused by another copy of VisualRoute being run, possibly as a service. |
