Got valid IP address but no working Internet connection
Hello experts,
today my neighbour brought me his laptop (guess the word is spreading around..haha).
Ok the thing is: he complained is not able to browse anymore, even though his internet connection seems to be fine. He said this happened after inserting a pendrive which was infected by god knows what.
What I did first:
1) Check his ethernet port.
2) Turn it on and use one of my connections (4th physical connection to my Router).
3) CMD console and check assigned IP .... I was able to PING my Router. No problems there.
4) Double checked by verifying the Connections Properties... TCP/IP shows normal configuration (DHCP automatically assigned , etc..) Looks ok.
5) PING WAN addresses and got ".....host couldn't be resolved etc.." not even a PING timeout.
6) Ran his Antivirus Software (NOD32 v4) which signatures were 10 days old. Not critical I suppose. No infections found.
7) Ran Malwarebytes (complete scan) and found 4 infections. Deleted them all.
Restart system
still no internet. ESET NOD32 was able to DL its latest signatures though. This kept me intrigued. It wont connect to any IP...not even resolve it... how the hell did it update his signatures? Only explanation I have, is that NOD32 has been compromised. (I should add that the copy he owns is a cracked version..hummm...)
Any ideas? I am no TCP/IP specialist and I really suspect it has something to do with this...
Important info:
Hardware:
HP Laptop OMNIBOOK XE2 (designed for Win98SE) ..yes it is very old!
550 Mhz AMD K6
256 RAM
NIC is external (PCMCIA)..but still working..
Software:
Windows XP (uE)
No Windows Updates installed yet
Office 2003
ESET NOD32 v4
Some other small apps but not too many
I know.... HW is not up to its SW. I will tell him this and suggest him to get legit or free antivirus.
Best regards,
Mauricio
today my neighbour brought me his laptop (guess the word is spreading around..haha).
Ok the thing is: he complained is not able to browse anymore, even though his internet connection seems to be fine. He said this happened after inserting a pendrive which was infected by god knows what.
What I did first:
1) Check his ethernet port.
2) Turn it on and use one of my connections (4th physical connection to my Router).
3) CMD console and check assigned IP .... I was able to PING my Router. No problems there.
4) Double checked by verifying the Connections Properties... TCP/IP shows normal configuration (DHCP automatically assigned , etc..) Looks ok.
5) PING WAN addresses and got ".....host couldn't be resolved etc.." not even a PING timeout.
6) Ran his Antivirus Software (NOD32 v4) which signatures were 10 days old. Not critical I suppose. No infections found.
7) Ran Malwarebytes (complete scan) and found 4 infections. Deleted them all.
Restart system
still no internet. ESET NOD32 was able to DL its latest signatures though. This kept me intrigued. It wont connect to any IP...not even resolve it... how the hell did it update his signatures? Only explanation I have, is that NOD32 has been compromised. (I should add that the copy he owns is a cracked version..hummm...)
Any ideas? I am no TCP/IP specialist and I really suspect it has something to do with this...
Important info:
Hardware:
HP Laptop OMNIBOOK XE2 (designed for Win98SE) ..yes it is very old!
550 Mhz AMD K6
256 RAM
NIC is external (PCMCIA)..but still working..
Software:
Windows XP (uE)
No Windows Updates installed yet
Office 2003
ESET NOD32 v4
Some other small apps but not too many
I know.... HW is not up to its SW. I will tell him this and suggest him to get legit or free antivirus.
Best regards,
Mauricio
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1) Make sure that gateway IP address is there.
2) Make sure that DNS IP address is set correctly (might be this one is the one make you can't resolve a site, DNS manage that and you don't have a correct DNS IP.
3) Once step1 and step2 is done. type whatismyip.com and see what it gives you, it should return your public IP address.
If 3 return something goos. then....... ROCK and ROLL.
DBA100.