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Question : Suddenly can't connect to Web - Can't Debug
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On 10/15 - the power suddenly went out to my entire house. Then I started having internet connection problems on my cable internet service. I also noticed I'm getting hit by "Backdoor/Seven Trojan Horse" - but as far as I can tell - it has been blocked from reaching my PCs. (I have turned off my firewall to debug - but I'm afraid to keep turning it off while I'm getting hit by these trojans.)
I use the following set up:
Ethernet Cable to Cable Modem to Router to Desktop PC and LapTop
I am running XP Home on desktop and XP Professional on laptop. All my virus definitions and Windows Update are up-to-date.
I've tried to debug the problem by removing the router and linking straight from the cable to the modem to the desktop PC. I received errors saying I couldn't register an IP address. So I did an ipcong /all - ipconfig /release and ipconfig /renew - as instruced by my cable company documentation. Still couldn't get an IP address. I called my cable company tech support and they indicated that everything was working through to my modem.
So I decided to check the original set-up. I connected my router and and registered the device with my cable company.
I was able to get back online for a few minutes -- but then I'd get the 404 error if I tried to click through to another page. It doesn't seem to matter if Firewall is on or off. I can see in my connection log that I am getting connected to the web initially.
-my laptop says the signal from the router is excellent
-my desktop and laptop have the same IP, DNS, etc. config.
-my cable modem indicatates that the power is on; the ethernet connection is on; and the Internet transmit light is blinking rapidly; but does go solid periodically.
-my router indicateds that the power is on; the ethernet connection is on; the Wireless B is working, the Internet transmit light is blinking rapidly;but does go solid periodically
-I have turned off my firewall to debug still can't get web asccess - I'm afraid to keep turning it off while I'm getting hit by trojans.
-I've replaced all my Ethernet cables with new cables.
-I've run a full system virus scan and a scan disk on both Lap Top and PC.
I'm wondering if my Ethernet card could have gotten fried from the power outage - although I have an APC surge protection devise that is grounded and protected.
Any idea what I should try next.
I can send you all kinds of documentation on this.
########## DeskTop #############
Issue - I have a 1394 Net Adaptor that my cable company put on my desk top last year. I'm no longer using the adaptor and I'm plugged into the Ethernet Port directly. I've tried to delete the 1394 Net Adaptor; but as soon as I reboot - it reinstalls even though I don't have it connected.
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\Owner>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : your-w92p4bhlzg
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : insightbb.com
Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connecti
on #2
Physical Address. . . . . . . . . : 00-E0-18-51-A7-EB
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.1.101
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 63.240.76.4
204.127.198.4
Lease Obtained. . . . . . . . . . : Thursday, October 16, 2003 8:37:14 A
M
Lease Expires . . . . . . . . . . : Friday, October 17, 2003 8:37:14 AM
C:\Documents and Settings\Owner>
###########LapTop##############
C:\Documents and Settings\April Lougheed>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : iGuideInc
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Wireless Network Connection:
Connection-specific DNS Suffix . : insightbb.com
Description . . . . . . . . . . . : Toshiba Wireless LAN Mini PCI Card
Physical Address. . . . . . . . . : 00-02-2D-7E-5F-64
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.1.102
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 63.240.76.4
204.127.198.4
Lease Obtained. . . . . . . . . . : Thursday, October 16, 2003 9:25:28 AM
Lease Expires . . . . . . . . . . : Friday, October 17, 2003 9:25:28 AM
PPP adapter {75797F69-4A9A-4391-A96F-656679F5C292}: ----###--- Don't recall this.
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
Physical Address. . . . . . . . . : 00-53-45-00-00-00
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 172.149.24.167
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 172.149.24.167
DNS Servers . . . . . . . . . . . : 152.163.242.134
NetBIOS over Tcpip. . . . . . . . : Disabled
C:\Documents and Settings\April Lougheed>
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Answer : Suddenly can't connect to Web - Can't Debug
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April,
I don;t see anything obvious here, but if you are having the problem on both machines, I would not suspect the NIC in your desktop and I wouldn;t suspect a TCP/IP issue to have manifested itself on both machines. Here's my best educated guess at this point:
1. You hooked the desktop directly to the modem and still had problems ==> problem may be isolated to (desktop or modem)
2. Laptop had problem connected wirelessly through router to modem ==> problem may be isolated to (laptop, router, or modem)
The fact that 1 and 2 are true (if I followed your detailed description accurately) implies the problem to be isolated to the modem (the only comon device in each). The cable company verified from their end and you are having intermittent behavior. Based on this, I would try one simple thing you did not mention: Tighten all coaxial connections with a wrench (just beyond "finger-tight"). I have had similar behavior before due to a loose coax connection. If this fixes your problem, I suspect that in the process of troubleshooting, if the modem was moved at all, because of the bulky nature of coax, if it is not torqued tight with a wrench, it tends to loosen on its own. Also, whether or not this turns out to be correlated to the electrical outage you had, you may want to further protect your system with surge protection of the coax line.
Hope this helps!
mrdtn
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