How to determine radio's IP address and UDP/TCP ports needed?

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  • Updated 5 years ago
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Can anyone tell me how to determine what the IP address is that my 6500 is using as well as which UDP/TCP ports are needed?
Tnx es 73 de Arnie W8DU
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Posted 5 years ago

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Dave - WB5NHL

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Click on Settings in SmartSDR->Radio Setup->General tab will show the IP assigned from your DHCP server (assuming a network connection). Otherwise it will show the IP being used for a direct connection. Regarding ports being used you'd need to do a port scan on the IP.

However, this is all automatic using DHCP so I don't understand "needed"?
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Tim - W4TME, Customer Experience Manager

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You can do a "netstat -n" from the Windows command prompt to see what UDP/TCP ports are open when the radio is running.
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Thanks for the info. I am not at the radio presently, but can you tell me if I can set a static IP address for the radio or is it always necessary to have DHCP assign the address?
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Tim - W4TME, Customer Experience Manager

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Currently there is no way to set a fixed IP address on the radio itself.
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Dudley - WA5QPZ

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For now you will need the DHCP to assign a IP address for the radio.
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Richard Clafton W4/G7EIX, Elmer

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Most DHCP Servers in most routers will allow you to assign a fixed IP on lease if you tell the DHCP Server the MAC address of the radio. That way you can be sure that the radio will always have the same IP. Then if you wish to pursue the narrowing down of which ports the radio uses you can utilize something like WireShark to do a capture from that IP address.

The MAC on a Flex 6000 starts with 50:56:63, so you can find the complete MAC address by using ARP from a command prompt.

Simply look up the IP that has been assigned in the SmartSDR Radio Information Panel and then enter the following command in a Command (DOS for you oldies) Prompt.

arp -a

C:\>arp -a

Interface: --- 0xd
Internet Address Physical Address Type 50-56-63-a8-ba-e6 dynamic

So the MAC is "50-56-63-a8-ba-e6"

if you are doing this from another machine on the network and get the response of "No ARP entries found." then simply do a quick PING of the IP address to make communication:


Pinging with 32 bytes of data:
Reply from bytes=32 time<1ms TTL=64

Ping statistics for
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

and then redo the ARP request.

You can then add the MAC address and assign an IP in your router DHCP server.
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Also, if you happen to have an iPad or iPhone there is a really great free App called Fing from Overlook Soft that will scan your whole network including any 6000's. The utility will also perform a scan for ports on the 6000 as well.

A wireless connection to your network is needed of course. I use this App often for troubleshooting networks.