ups4
join:2001-09-10
Sunrise, FL
 ·Comcast
| [Connectivity] DHCP Server Denying IP Lease Extension?
I have been regularly getting an error message in my Windows System Event Log stating that the DHCP server denied the lease extension for the IP address on my NIC.
I lose connection for about 30 seconds or so when this happens. Comes right back and everything is normal.
I'm using the Toshiba PCX1100 cable modem with a Linksys BEFSR41 wired router connected to one other desktop system.
Both computers running XP Home.
Generally speaking there are no other problems surfing or with download speeds. I do get some slow page loading at times...as if there is a "hiccup" or something...maybe packet loss? The Tweak Test here at BBR always shows all packets received, though.
Could someone shed some light on this error message, and is there anything that can be corrected to eliminate it?
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my get-up-and-go musta got up and went..... |
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Morty
Premium
join:2004-09-18 | It wouldn't be a problem with Comcast if you're getting that error while using your router. Most likely the issue is with your router or computer. Maybe try updating your router firmware, swapping network cables and NICs if required. |
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ups4
join:2001-09-10
Sunrise, FL
·Comcast
| Thanks Joebob.
Router firmware is up-to-date.
I wasn't necessarily blaming Comcast on this one, just curious as to why it keeps occurring.
NIC is new with current drivers also, so I doubt this is an issue.
Paul
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my get-up-and-go musta got up and went..... |
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Morty
Premium
join:2004-09-18
1 edit | Yeah, I understand you weren't blaming Comcast, only ruling it out. Could just be an issue with the router? I had my original linksys go down south, I currently use a D-Link router. Given the cheap price of routers these days, perhaps you could pick a new one up from best buy, hook it up, see if the problem goes away? If it does, keep it. If it doesn't just return it 
Second good question, since you have the router -- do you have multiple PCs? If so, do they all have the same issue, or only this one? |
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ups4
join:2001-09-10
Sunrise, FL
·Comcast
| Hmmmmm, didn't think to check the other desktop. I'll look into that today.
Router is also brand new...just swapped it at Best Buy cause the power converter died.
I think I'll try running without the router for a day or so and see if the error message still appears.
Thanks again,
Paul
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my get-up-and-go musta got up and went..... |
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Morty
Premium
join:2004-09-18
| Make sure you use a software firewall! Otherwise you'll be reformatting your machine if your computer isn't up to date in patches and then some.
(my recommendation is just to download the McAfee firewall from Comcast, if you don't want it on your box after, it's easy to uninstall) |
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ups4
join:2001-09-10
Sunrise, FL | I've been using Zone Alarm Pro for years now...no problems there.
Paul
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my get-up-and-go musta got up and went..... |
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kpatz
MY HEAD A SPLODE
Premium
join:2003-06-13
Manchester, NH
| reply to ups4
If you're having DHCP issues that manifest as errors in the event log, AND you're using a router, than the problem exists somewhere between the router and the PC. Comcast would have nothing to do with this, as the router acquires IPs from Comcast separately, and issues there wouldn't cause event log errors in XP.
Does the other computer have issues getting IPs from the router as well, or is it just one system?
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SMTP: Spam and Malware Transfer Protocol. Also used on rare occasion to transmit e-mail messages. |
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ups4
join:2001-09-10
Sunrise, FL
·Comcast
| Thanks for the reply kpatz.
I haven't had a chance to check the other computer yet.
It belongs to my son, and he logs on with a password.
He has been out of town and will be back tomorrow.
I'll look into it then.
Paul
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my get-up-and-go musta got up and went..... |
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NormanS
Premium,MVM
join:2001-02-14
San Jose, CA
 ·Pacific Bell - SBC
| reply to ups4
said by ups4  :I've been using Zone Alarm Pro for years now...no problems there. ZAP configured to trust the LAN IP address? To allow DHCP requests (UDP ports 67, 68 on both ends)?
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Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum |
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ups4
join:2001-09-10
Sunrise, FL
·Comcast
| Yep, LAN IP is in trusted zone, but I have never allowed DHCP requests.
Although DHCP server IP is in trusted zone as well. Not sure if this would effectively be the same.
Update: In looking at the System Log in Event Viewer, there hasn't been a lease extension denial in two days now 
Go figure?
Paul
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my get-up-and-go musta got up and went..... |
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NormanS
Premium,MVM
join:2001-02-14
San Jose, CA
·Pacific Bell - SBC
| said by ups4 :Yep, LAN IP is in trusted zone, but I have never allowed DHCP requests. Although DHCP server IP is in trusted zone as well. Not sure if this would effectively be the same. Update: In looking at the System Log in Event Viewer, there hasn't been a lease extension denial in two days now Go figure? How do you get a DHCP lease when you deny DHCP requests?
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Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum |
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ups4
join:2001-09-10
Sunrise, FL
·Comcast
| I shouldn't say "I've never allowed"....what I meant was the "Allow outgoing DHCP requests" has never been checked.
This is the default setting in ZAP, as far as I know, and I have never changed it. 
Would you suggest that this setting be changed?
Paul
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my get-up-and-go musta got up and went..... |
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NormanS
Premium,MVM
join:2001-02-14
San Jose, CA
·Pacific Bell - SBC
| I know nothing about how ZAP works. OTOH, if DHCP requests are blocked, you wouldn't be able to lease an IP address.
This wouldn't affect your modem, I suspect; DHCP request from your modem to Comcast is outside the ZAP border.
Within the LAN it is probably covered by trusting the LAN IP address.
I use Kerio Personal Firewall 2.1.5. I have to specifically configure the LAN IP address in a "Custom Address" menu. After that, I have to specify that DHCP requests be allowed; I just point the IP address to the "Custom Address" entry.
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Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum |
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ups4
join:2001-09-10
Sunrise, FL
·Comcast
| said by NormanS :I use Kerio Personal Firewall 2.1.5. I have to specifically configure the LAN IP address in a "Custom Address" menu. After that, I have to specify that DHCP requests be allowed; I just point the IP address to the "Custom Address" entry. I understand now.
ZA has a similar feature to allow custom address's in the Security area for both Internet and Trusted Zones.
I did notice, however, that there is only a "Allow outgoing DHCP (UDP port 67) and nothing about incoming DHCP.
I'm going to look into this further with the ZA help area and see if I can find out more.
Thanks for your input.
Paul
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my get-up-and-go musta got up and went..... |
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