[SOLVED] DHCP problem on Server 2003

sostrow28 · 04-23-2008, 08:51 AM

I having some issues with clients receiving incorrect ip addresses. I have found that the clients connecting through ethernet cable are using our firewall as a default gateway while those with wireless adapters are using the Windows server as the default gateway(This is correct). Clients that are connecting through the firewall have default one day leases(should be 8 days) and have an ip address on a differest subnet. I have also found that some clients in this group do not report to the DHCP server while others do. In addition leases expiration dates for some clients are listed different in the DHCP server then what is shown in ipconfig /all. These computers can all be pinged and I have already tried ipconfig/release and ipconfig/renew. I only have about 55 clients and we have about 155 addresses set aside for lease.

**XtabbedoutX** · 04-23-2008, 11:26 AM

It sounds like your firewall's DHCP function is turned on. Make sure you only have 1 Server or Firewall functioning as a DHCP server.

What brand is your firewall?

How many servers do you have?

sostrow28 · 04-23-2008, 12:03 PM

Thats exactly what it was. Our firewall is a Sonic Wall and it had the DHCP enabled with a larger address range. This explains all the obscure addresses. I appreciate the message as it confirms what I found.

**XtabbedoutX** · 04-23-2008, 01:50 PM

That's what we are here for.

04-23-2008, 08:51 AM	#1 (permalink)
sostrow28 Registered User Join Date: Mar 2008 Posts: 14 OS: xp sp2	[SOLVED] DHCP problem on Server 2003 I having some issues with clients receiving incorrect ip addresses. I have found that the clients connecting through ethernet cable are using our firewall as a default gateway while those with wireless adapters are using the Windows server as the default gateway(This is correct). Clients that are connecting through the firewall have default one day leases(should be 8 days) and have an ip address on a differest subnet. I have also found that some clients in this group do not report to the DHCP server while others do. In addition leases expiration dates for some clients are listed different in the DHCP server then what is shown in ipconfig /all. These computers can all be pinged and I have already tried ipconfig/release and ipconfig/renew. I only have about 55 clients and we have about 155 addresses set aside for lease.

04-23-2008, 11:26 AM	#2 (permalink)
XtabbedoutX TSF Enthusiast Join Date: Sep 2007 Location: Oklahoma City Posts: 1,189 OS: Server 2K3 R2 SP 2, Server 2K SP4, XP PRO SP 3, Mac OS X 10.5, iPhone My System	Re: DHCP problem on Server 2003 It sounds like your firewall's DHCP function is turned on. Make sure you only have 1 Server or Firewall functioning as a DHCP server. What brand is your firewall? How many servers do you have?

04-23-2008, 12:03 PM	#3 (permalink)
sostrow28 Registered User Join Date: Mar 2008 Posts: 14 OS: xp sp2	Re: DHCP problem on Server 2003 Thats exactly what it was. Our firewall is a Sonic Wall and it had the DHCP enabled with a larger address range. This explains all the obscure addresses. I appreciate the message as it confirms what I found.

04-23-2008, 01:50 PM	#4 (permalink)
XtabbedoutX TSF Enthusiast Join Date: Sep 2007 Location: Oklahoma City Posts: 1,189 OS: Server 2K3 R2 SP 2, Server 2K SP4, XP PRO SP 3, Mac OS X 10.5, iPhone My System	Re: DHCP problem on Server 2003 That's what we are here for.