is there a way to view clients connected to the router?
I read on a Cisco PDF to enable ip finger - what does this do exactly?
I have an 857W wireless router and would like to see who is connecting to my network.
I know of the commands:
show ip nat translations - which give me all the forwarded port information
show users - however this only gives me clients connected to terminal applications
just as a sub question the output produced from show users is:
Line User Host(s) Idle Location
* 3 vty 1 admin idle 00:00:00 192.168.1.2
Interface User Mode Idle Peer Address
Vi2 PPPoATM 00:00:00 126.96.36.199
I don't understand the 2nd connection? After issuing the whois command on UNIX terminal the IP address is within my ISP range and Vi2 tells me that the interface is virtual2! Is this a potential security breach or is this normal?
Hi, If you have CDP enabled the router will identify all Cisco devices connected to it " show cdp neighbor" or "show cdp neighbor detail". You can also run the show IP route and get the IP addresses of all directly interfaces with IP address and then do an nslookup from your pc command prompt.
bsmt#show cdp neighbor
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone
The "show ip arp" command will give you the ip addresses and mac-addresses of directly connected clients (directly means on the same layer 2 network), if they already provided their arp info to the router.
You can also ping the subnet to collect all the arp information like this:
Let's say you have a subnet 192.168.1.0 /24.
Then "ping 192.168.1.255" will do the job for you.
You can enable cdp with the "cdp run" command globally or the "cdp enable" command on an interface.
Ok, the virtual interface Vi2 is bound to the ATM0 layer:
#show interface Vi2
which my guess is that it binds the Dialer0 and ATM0 interfaces together. The IP address I got therefore must be my ISP broadcast or gateway address.
I also managed to monitor the full parameters of the hardware by creating an SNMP server and monitoring through a program called Cacti which has a Cisco template to get interface, user, processor, and other data, running from a mySQL server.
It also identifies the Vi2 as a sub-interface from the ATM layer as the maximum bandwidth on the graph illustrated is upto 1Mb consistantly. Which makes sense as I have a 2Mb connection!
Ping I wasn't so lucky with I don't think I set it up correctly as the data given to me is minimal and no IP addresses stated even though I am on the correct subnet: 192.168.1.0/24
Something I guess I'll have to look into.
But thank you for all your help and assistance, sincerely if it wasn't for this forum and everybody in it contributing that I would not have learned as much about IOS as I know now or been able to even get my router up and running!
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