Sniffing MACs in a dynamic area? - Techwatch Support Forums: Digital & Satellite TV, FTA, Cable, Computers, Mobile Phones, Apple and General Tech Forums

BL4K3Y · 30-09-09, 01:01 AM

I have tried running DHCP Sniffer to get some MACs but I only get MACs (lots of them) and no configs. DHCP Force doesn't seem to bring any MACs back whatsoever. Is their a work-around for this?

Thanks.

TheCoder · 30-09-09, 02:21 AM

VM are starting to catch on now and are trying to make things difficult !

If you cant force (which you shouldn't really do anyway) then your mostly limited to trying Macs from different areas to see what you get.

To get high speed Macs (20Meg) its often better to passive sniff from a subbed modem in a different area. This is because a lot of the higher tier modems have now been moved to alternate channels which you dont see from the lower tier modems.

bassethound · 30-09-09, 10:56 AM

I have been sent two new modems from VM n the last 2 months and have been using the old macs from the old modems with no problem!

taylord1984 · 30-09-09, 02:32 PM

best thing to do is just try them untill you get online with 20mb bb. you don't need the names if its any thing like my area. just put what ever you like in the config name bit as the modem will get what it is given not what it asks for depending on mac used.

BL4K3Y · 30-09-09, 02:42 PM

I can autoserve configs so I don't need a 20MB MAC. I just want to know how I could scan MACs easier. My uncle has a modded SB5101e running on 20MB (which I modded for him). Could I use this to sniff for more 20MB MACs?

taylord1984 · 30-09-09, 04:25 PM

can't see why not as that is what i use.

xpn08 · 30-09-09, 06:12 PM

This is something that I have noticed while scanning for MACS. The usual 'DHCP OFFER' and 'DHCP ACK' that used to hold the config file no longer do, however the only DHCP messages that do are from ip addressed such as 10.X.X.X rather than the 8X.X.X.X addresses.

My belief is that the config file is only provided upon bootup of the modem (ie, when the modem is still using a local IP of 10.X.X.X). Once the public IP address is known (8X.X.X.X), there is no reason to include the config file.

Again because i am new to all this, any corrections would be appreciate

30-09-09, 01:01 AM	#1 (permalink)
BL4K3Y Senior Member Join Date: Apr 2008 Location: Colne, Lancashire Posts: 7,004 Thanks: 247 Thanked 1,319 Times in 1,211 Posts	Sniffing MACs in a dynamic area? I have tried running DHCP Sniffer to get some MACs but I only get MACs (lots of them) and no configs. DHCP Force doesn't seem to bring any MACs back whatsoever. Is their a work-around for this? Thanks.

30-09-09, 02:21 AM	#2 (permalink)
TheCoder Underground Crew Member Join Date: May 2009 Location: Undrground Posts: 2,149 Thanks: 15 Thanked 1,691 Times in 933 Posts	Re: Sniffing MACs in a dynamic area? VM are starting to catch on now and are trying to make things difficult ! If you cant force (which you shouldn't really do anyway) then your mostly limited to trying Macs from different areas to see what you get. To get high speed Macs (20Meg) its often better to passive sniff from a subbed modem in a different area. This is because a lot of the higher tier modems have now been moved to alternate channels which you dont see from the lower tier modems.

30-09-09, 10:56 AM	#3 (permalink)
bassethound Senior Member Join Date: Apr 2008 Posts: 138 Thanks: 43 Thanked 57 Times in 37 Posts	Re: Sniffing MACs in a dynamic area? I have been sent two new modems from VM n the last 2 months and have been using the old macs from the old modems with no problem!

30-09-09, 02:32 PM	#4 (permalink)
taylord1984 Senior Member Join Date: Aug 2009 Location: Bristol Posts: 100 Thanks: 20 Thanked 11 Times in 11 Posts	Re: Sniffing MACs in a dynamic area? best thing to do is just try them untill you get online with 20mb bb. you don't need the names if its any thing like my area. just put what ever you like in the config name bit as the modem will get what it is given not what it asks for depending on mac used. Last edited by taylord1984; 30-09-09 at 02:33 PM. Reason: typos

30-09-09, 02:42 PM	#5 (permalink)
BL4K3Y Senior Member Join Date: Apr 2008 Location: Colne, Lancashire Posts: 7,004 Thanks: 247 Thanked 1,319 Times in 1,211 Posts	Re: Sniffing MACs in a dynamic area? I can autoserve configs so I don't need a 20MB MAC. I just want to know how I could scan MACs easier. My uncle has a modded SB5101e running on 20MB (which I modded for him). Could I use this to sniff for more 20MB MACs?

30-09-09, 04:25 PM	#6 (permalink)
taylord1984 Senior Member Join Date: Aug 2009 Location: Bristol Posts: 100 Thanks: 20 Thanked 11 Times in 11 Posts	Re: Sniffing MACs in a dynamic area? can't see why not as that is what i use.

30-09-09, 06:12 PM	#7 (permalink)
xpn08 Member Join Date: Mar 2009 Posts: 30 Thanks: 4 Thanked 0 Times in 0 Posts	Re: Sniffing MACs in a dynamic area? This is something that I have noticed while scanning for MACS. The usual 'DHCP OFFER' and 'DHCP ACK' that used to hold the config file no longer do, however the only DHCP messages that do are from ip addressed such as 10.X.X.X rather than the 8X.X.X.X addresses. My belief is that the config file is only provided upon bootup of the modem (ie, when the modem is still using a local IP of 10.X.X.X). Once the public IP address is known (8X.X.X.X), there is no reason to include the config file. Again because i am new to all this, any corrections would be appreciate

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