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Debugging
The router provides some useful troubleshooting tools.
Ping
The Tool PING is a diagnosis tool for testing the reachability of a certain host in an IPv4 network. The host is entered in form of an IP address or a domain name as Parameter. A click on Execute command executes the command immediately and outputs the response.
Example for a ping to the host insys-icom.com:
PING insys-icom.com (172.67.1.194) 56(84) bytes of data.
64 bytes from 172.67.1.194 (172.67.1.194): icmp_seq=1 ttl=58 time=8.36 ms
--- insys-icom.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 8.363/8.363/8.363/0.000 ms
The Tool PING6 is a diagnosis tool for testing the reachability of a certain host in IPv6 network. The host is entered in form of an IP address or a domain name as Parameter. A click on Execute command executes the command immediately and outputs the response.
Example for a ping6 to the host insys-icom.com:
PING insys-icom.com(2606:4700:10::ac43:1c2 (2606:4700:10::ac43:1c2)) 56 data bytes
64 bytes from 2606:4700:10::ac43:1c2 (2606:4700:10::ac43:1c2): icmp_seq=1 ttl=59 time=29.10 ms
--- insys-icom.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 29.982/29.982/29.982/0.000 ms
Traceroute
The Tool TRACEROUTE is a routine that displays the routers and Internet nodes over which IPv4 data packets get to the queried host. The host is entered in form of an IP address or a domain name as Parameter. A click on Execute command executes the command immediately and outputs the response.
Example for Traceroute to the host insys-icom.com:
traceroute to insys-icom.com (104.20.13.95), 3 hops max, 38 byte packets
1 192.168.200.2 (192.168.200.2) 0.436 ms 0.266 ms 0.274 ms
2 hsir1.rz1.r-kom.net (95.130.160.1) 3.124 ms 3.491 ms 1.726 ms
3 cr1-be4.rz1.r-kom.net (212.77.160.81) 1.488 ms 3.324 ms 1.605 ms
The Tool TRACEROUTE6 is a routine that displays the routers and Internet nodes over which IPv6 data packets get to the queried host. The host is entered in form of an IP address or a domain name as Parameter. A click on Execute command executes the command immediately and outputs the response.
Example for Traceroute to the host insys-icom.com:
traceroute to insys-icom.com (2606:4700:10::6814:e5f), 3 hops max, 64 byte packets
1 p200300e1270f56010000000000000001.dip0.t-ipconnect.de (2003:e1:270f:5601::1) 1.092 ms 0.448 ms 0.345 ms
2 2003:0:8803:5800::1 (2003:0:8803:5800::1) 17.421 ms 17.569 ms 17.051 ms
3 2003:0:1203:8015::2 (2003:0:1203:8015::2) 30.157 ms 29.923 ms 34.580 ms
DNS lookup
The Tool DNS LOOKUP is a routine for querying an entry from a domain name system server. It is usually used to determine the IP address for a certain domain name. The domain name is handed over as Parameter here. A click on Execute command executes the command immediately and outputs the response.
Example for a DNS lookup for the domain name insys-icom.com:
14:08:55.468410 ec:b1:d7:13:1e:82 > 09:00:09:09:13:a6, ethertype Unknown (0x88b7), length 66:
0x0000: 00ca 62a9 0000 ecb1 d713 1e80 8648 fd4b ..b..........H.K
0x0010: a667 5c83 4176 1df8 7b20 8aca 77f4 5519 .g\.Av..{...w.U.
0x0020: 0800 0900 0302 0000 0000 0000 0000 0000 ................
0x0030: 8deb ace3 ....
14:08:55.607495 ARP, Request who-has 192.168.200.143 tell 192.168.201.226, length 46
14:08:55.677773 ARP, Request who-has 192.168.200.114 tell 192.168.200.111, length 46
14:08:55.874924 ARP, Request who-has 192.168.201.111 tell 192.168.201.29, length 46
tcpdump
The Tool TCPDUMP permits to record network traffic. The Parameters to be handed over are described in detail under www.tcpdump.org. A click on Execute command starts the recording. The recording is stopped after a click on Stop TCPDUMP recording and the recorded network traffic is displayed. The last recording can be downloaded from the router with a click on TCPDUMP recording after the recording.
Example for the recording of the network traffic on the router interface IP net 3 (net3) using -i net3 as parameter:
14:08:55.468410 ec:b1:d7:13:1e:82 > 09:00:09:09:13:a6, ethertype Unknown (0x88b7), length 66:
0x0000: 00ca 62a9 0000 ecb1 d713 1e80 8648 fd4b ..b..........H.K
0x0010: a667 5c83 4176 1df8 7b20 8aca 77f4 5519 .g\.Av..{...w.U.
0x0020: 0800 0900 0302 0000 0000 0000 0000 0000 ................
0x0030: 8deb ace3 ....
14:08:55.607495 ARP, Request who-has 192.168.200.143 tell 192.168.201.226, length 46
14:08:55.677773 ARP, Request who-has 192.168.200.114 tell 192.168.200.111, length 46
14:08:55.874924 ARP, Request who-has 192.168.201.111 tell 192.168.201.29, length 46
The recording can be restricted further to increase clarity:
Only record packets with a certain protocol, here TCP: -i net3 tcp
Only record packets with a certain protocol and port, here TCP on port 502 (only Modbus): -i net3 tcp port 502
Record all packets except a certain protocol and port, here UDP on port 1194 (everything except OpenVPN): -i net3 not udp port 1194
Record all packets from and to a certain IP address: -i net3 host 192.168.100.35
AT command
The Tool AT command may only be used upon consultation with the Technical Support of INSYS icom and permits to transmit AT commands to the selected Modem. The command is handed over as Parameter here. A click on Execute command executes the command immediately and outputs the response. An improper use of this function may affect the function of the router beyond a reset!
Port mirroring
The Tool Port mirroring permits to mirror the data traffic on the Source port to the Destination port (sniffer port). The data traffic can then be read on the destination port for analysis purposes. The term port does not only refer to Ethernet ports here. it is also possible to select router interfaces as a port.