Functions
MoRoS ADSL 2.1 PRO
13.9.10
Debugging
Various tools of the MoRoS ADSL 2.1 PRO enable to analyse problems with
network 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
allows to request DNS information via an IP address or a domain name. The
"TCPDUMP" tool allows to record network packets.
Configuration via the web interface
In order to send a ping packet, select in the menu "System" on the page
"Debugging" the tool "PING" for IPv4 pings or "PING6" for IPv6 pings in
the drop-down list field, 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 route of an IP packet, select in the menu "System"
on the page "Debugging" the tool "TRACEROUTE" for IPv4 packets or
"TRACEROUTE6" for IPv6 packets in the drop-down list field, enter 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
increase 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 displayed 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 field,
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
"System" on the page "Debugging" the tool "TCPDUMP" in the drop-
down list field, 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 machine using "tcpdump" or "wireshark".
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