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# 1  
Old 09-19-2010
ipfw and dhcp

I have a little problem with my server configuration.
So: I have two PC's with DHCP enable and both of them have two NIC's.

PC1 - le0 ADSL
PC1 - le1

PC2 - le0
PC2 - le1

One NIC on PC1 is connected to ADSL, another one have IP address
PC2 have on the 1st NIC, and on the 2nd.
When someone want to connect and his MAC is not configured in PC1 ( to take IP from network ) he take IP address from DHCP from PC2 -
The problem is that, when I type: /release /renew somethimes PC take IP address from ADSL - How can I restrict/deny this range - don't wana my PC's to take IP's from there.
I try with: ipfw add 2 deny all from to any;ipfw add 3 deny all from any to;ipfw add 4 deny all from any to and many, many, but nothing works Smilie
And the second question is: when I ping from to ( another PC ), ping is < 1ms, but when I ping ( another interface ), ping is too high ( like 2ms,8ms, 20ms and etc. ).It's not hardware problem in lan card, becouse interfaces are virtual.
# 2  
Old 09-19-2010
Are you running two DHCP servers? use static DHCP entries - eg: configure their MAC addresses to get the same IP each time. I have done this with ISC DHCP.

where is PC2:le1 plugged into physically?
# 3  
Old 09-19-2010
Yes I have two DHCP servers and also use fixed-address ( on the 1st one ).
On the 1st PC in dhcp.conf I have: range;
so when PC with no fixed-address connect, it's redirected to dhcp on PC2.

PC1 and PC2 are part of my VMWare Infrastructure.
PC2 le0 is definite like VM Nework Public, le1 is VM Network Private.

P.S. Something for packet filter for ADSL network?How to restrict this network?

Last edited by mrowcp; 09-19-2010 at 07:35 PM..
# 4  
Old 09-26-2010
Ok, lets ask something else.

1) How to config my dhcp server ( or put some rule in ipfw ) to deny to be distributed/used from PC's in my network?

2) When 1 laptop is connetced to my wireless network, its take IP ( becouse laptop MACs is not configured in dhcp server to take ip from network ).So I run: ipconfig /release and ipconfig /renew
Now laptop wana take IP, but I put this IP manualy like 2nd in my network adapter, so laptop can take it and in cmd I have this msg:

C:\Documents and Settings\PC_User>ipconfig /renew

Windows IP Configuration

No operation can be performed on Local Area Connection while it has its media di
An error occurred while renewing interface Wireless Network Connection : The DHC
P client has obtained an IP address that is already in use on the network. The l
ocal interface will be disabled until the DHCP client can obtain a new address.
Wireless adapter continue to reconnecting and after 1.40min he take IP
Why my dhcp server say: "IP address that is already in use on the network" This IP is released and no one use it.Is there any options in dhcp.conf for releasing time?

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