INSYS MoRoS GPRS 2.1 PRO, Руководство пользователя

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Functions MoRoS GPRS 2.1 PRO
12.13.10 Debugging
Several tools of the MoRoS GPRS 2.1 PRO allow for analysing problems with net-
work connections.
The "PING" tool allows to send ICMP pings (ping packets). This enables to test,
whether a specific machine is available in the network, easily. The "TRACEROUTE"
tool shows the route of an IP packet to its destination. The "DNS LOOKUP" tool al-
lows to request DNS information via an IP address or a domain name. The
"TCPDUMP" tool allows to record network packets.
Configuration with the web interface
In order to send a ping packet, select in the menu "System" on the page
"Debugging" the tool "PING" in the drop-down list, enter the IP address,
to which you want to send the ping packet, or the domain name into the
field "Parameter" and click on "OK". Optionally, you may enter additional
parameters before, like -s 300 (sends 300 bytes as payload in ICMP ping)
or -c 3 (sends subsequent 3 pings) for example. The reply will be displayed
on the bottom of the page.
In order to trace the rout of an IP packet, select in the menu "System" on
the page "Debugging" the tool "TRACEROUTE" in the drop-down list, en-
ter the IP address, to which you want to send the IP packet, or the domain
name into the field "Parameter" and click on "OK". Optionally, you may in-
crease the standard number of 3 hops by increasing the number of hops
to 5 for example using the parameter "-m 5" before. The reply will be dis-
played on the bottom of the page.
In order to query DNS information, select in the menu "System" on the
page "Debugging" the tool "DNS LOOKUP" in the drop-down list, enter
the IP address or domain name to be queried into the field "Parameter"
and click on "OK". If no DNS server has been configured or assigned by
an external provider or router, this query may take up to 40 seconds.
In order to start recording of network packets, select in the menu "Sys-
tem" on the page "Debugging" the tool "TCPDUMP" in the drop-down list,
specify at least the network device using the parameter "-i" in the field
"Parameter" (e.g. "-i br0" for the LAN interface) and click on "OK". The
available network devices can be identified by selecting the link "Show
current system state" in the menu "System" on the page "System data".
After starting, the recording will continue until it is stopped manually or
has reached a size of 1 MB. The recording will be displayed immediately
after stopping and can be downloaded as a file using the link "TCPDUMP
recording"that will then be displayed. It can be viewed on an external ma-
chine using "tcpdump" or "wireshark".
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