router security

frustratedIam · 09-21-2005, 01:30 PM

I have a d-link broadband router. I wanted to check its security so went to sheilds up and just about ALL ports showed open. Help me please

johnwill · 09-21-2005, 05:15 PM

It sounds like you have configured your machine to be in the DMZ, or you have the router installed incorrectly. Do you have the broadband modem running to the WAN port of the router, and your machine connected to one of the LAN ports?

frustratedIam · 09-21-2005, 05:20 PM

I have a always on satelite connection to the net and configed it to be a dynamic ip in the router and my pc in the lan port

johnwill · 09-22-2005, 03:12 PM

It the satellite connection plugged into the WAN port?

frustratedIam · 09-22-2005, 05:48 PM

yes, it is plugged into the wan port

johnwill · 09-22-2005, 06:02 PM

How about the model of the router, the version and patch level of Windows, and the output of this:

Open a DOS window and type:

IPCONFIG /ALL >C:\RESULT.TXT

Open C:\RESULT.TXT with Notepad and copy/paste the entire results here.

frustratedIam · 09-22-2005, 07:29 PM

router is a d-link DI-604 v.3.51 windows xp media center sp 2

results

Windows IP Configuration

Host Name . . . . . . . . . . . . : SUSIEQ

Primary Dns Suffix . . . . . . . :

Node Type . . . . . . . . . . . . : Mixed

IP Routing Enabled. . . . . . . . : No

WINS Proxy Enabled. . . . . . . . : No

DNS Suffix Search List. . . . . . : anikast.ca

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : anikast.ca

Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Ethernet NIC

Physical Address. . . . . . . . . : 00-11-2F-D6-F9-2F

Dhcp Enabled. . . . . . . . . . . : Yes

Autoconfiguration Enabled . . . . : Yes

IP Address. . . . . . . . . . . . : 192.168.0.100

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . : 192.168.0.1

DHCP Server . . . . . . . . . . . : 192.168.0.1

DNS Servers . . . . . . . . . . . : 192.168.0.1

Lease Obtained. . . . . . . . . . : September 22, 2005 5:55:05 PM

Lease Expires . . . . . . . . . . : September 29, 2005 5:55:05 PM

frustratedIam · 09-23-2005, 03:16 PM

I removed the router and connected straight through to the internet. I get the same results as I did with the router. I am so confused. When I had dialup and checked gibsons sheilds up all ports were in stealth. I am using zonealarm pro

johnwill · 09-23-2005, 04:52 PM

Well, it makes no sense to me. The only way I can see the router allowing all the ports is that you have the machine in the DMZ, or you have connected the router incorrectly. Have you reset it to factory defaults and tried it?

frustratedIam · 09-23-2005, 06:45 PM

I have reset it to factory defaults and am not in dmz. I am going to unhook everything and try again. The funny thing is that when I bypassed the router I didn't have to change how I connect to the internet.

**Resolution** · 09-23-2005, 07:01 PM

Does that router allow you to set firewall rules such as this...

http://support.dlink.com/emulators/d..._firewall.html

frustratedIam · 09-23-2005, 08:05 PM

yes, I can do that. I was trying to figure that out

johnwill · 09-24-2005, 12:04 PM

The router in it's default configuration should allow very few ports through, 113 is sometimes visible, but little else.

Exactly what ports show up open when you're using the router after a factory reset and do the port scan?

frustratedIam · 09-24-2005, 01:38 PM

I rese the router and did a all service ports scan and everyone was open except 20,21,80,137,138,139,443 and 445 are all in stealth. I got the same results from my other computer on the network

frustratedIam · 09-24-2005, 02:18 PM

take note as stated in a previous post I get the same results when I bypass the router

johnwill · 09-24-2005, 03:57 PM

This is apparently one I'd have to see. I have an SMC and a D-Link router here, and they work as I'd expect, and my ports are all invisible, except for the FTP port, which I have open for my server. Please post your report here when using the router.

GRC Port Authority Report created on UTC: 2005-09-24 at 22:55:58

Results from scan of ports: 0, 21-23, 25, 79, 80, 110, 113,
119, 135, 139, 143, 389, 443, 445,
1002, 1024-1030, 1720, 5000

0 Ports Open
1 Ports Closed
25 Ports Stealth
---------------------
26 Ports Tested

NO PORTS were found to be OPEN.

The port found to be CLOSED was: 21

Other than what is listed above, all ports are STEALTH.

TruStealth: FAILED - NOT all tested ports were STEALTH,
- NO unsolicited packets were received,
- NO Ping reply (ICMP Echo) was received.

frustratedIam · 09-24-2005, 04:35 PM

shields up report

----------------------------------------------------------------------

GRC Port Authority Report created on UTC: 2005-09-24 at 23:34:02

Results from scan of ports: 0-1055

1048 Ports Open
0 Ports Closed
8 Ports Stealth
---------------------
1056 Ports Tested

NO PORTS were found to be CLOSED.

Ports found to be STEALTH were: 20, 21, 80, 137, 138, 139, 443,
445

Other than what is listed above, all ports are OPEN.

TruStealth: FAILED - NOT all tested ports were STEALTH,
- NO unsolicited packets were received,
- NO Ping reply (ICMP Echo) was received.

**Resolution** · 09-24-2005, 04:51 PM

First off, I have never seen a router automagically block ports that are notorious for being hacker targets, and then somehow leave everything else open. Turn off ZoneAlarm and then run the test. See if they differ when using the router and without it.

frustratedIam · 09-24-2005, 05:03 PM

zonealarm shut off

----------------------------------------------------------------------

GRC Port Authority Report created on UTC: 2005-09-25 at 00:01:58

Results from scan of ports: 0-1055

1048 Ports Open
0 Ports Closed
8 Ports Stealth
---------------------
1056 Ports Tested

NO PORTS were found to be CLOSED.

Ports found to be STEALTH were: 20, 21, 80, 137, 138, 139, 443,
445

Other than what is listed above, all ports are OPEN.

TruStealth: FAILED - NOT all tested ports were STEALTH,
- NO unsolicited packets were received,
- NO Ping reply (ICMP Echo) was received.

frustratedIam · 09-24-2005, 05:57 PM

I used zonealarm to block all the ports that are open and I still get the same results. Is it possiible shields up is not testing the correct ip?

09-21-2005, 01:30 PM	#1 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	router security I have a d-link broadband router. I wanted to check its security so went to sheilds up and just about ALL ports showed open. Help me please

09-21-2005, 05:15 PM	#2 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 29,735 OS: XP-Pro, Vista, Linux Blog Entries: 1	It sounds like you have configured your machine to be in the DMZ, or you have the router installed incorrectly. Do you have the broadband modem running to the WAN port of the router, and your machine connected to one of the LAN ports? __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

09-22-2005, 03:12 PM	#4 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 29,735 OS: XP-Pro, Vista, Linux Blog Entries: 1	It the satellite connection plugged into the WAN port? __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

09-22-2005, 06:02 PM	#6 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 29,735 OS: XP-Pro, Vista, Linux Blog Entries: 1	How about the model of the router, the version and patch level of Windows, and the output of this: Open a DOS window and type: IPCONFIG /ALL >C:\RESULT.TXT Open C:\RESULT.TXT with Notepad and copy/paste the entire results here. __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

09-23-2005, 03:16 PM	#8 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	tearing my hair out! I removed the router and connected straight through to the internet. I get the same results as I did with the router. I am so confused. When I had dialup and checked gibsons sheilds up all ports were in stealth. I am using zonealarm pro

09-21-2005, 05:20 PM	#3 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	I have a always on satelite connection to the net and configed it to be a dynamic ip in the router and my pc in the lan port

09-22-2005, 05:48 PM	#5 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	yes, it is plugged into the wan port

09-22-2005, 07:29 PM	#7 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	router is a d-link DI-604 v.3.51 windows xp media center sp 2 results Windows IP Configuration Host Name . . . . . . . . . . . . : SUSIEQ Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Mixed IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : anikast.ca Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : anikast.ca Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Ethernet NIC Physical Address. . . . . . . . . : 00-11-2F-D6-F9-2F Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 192.168.0.100 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.0.1 DHCP Server . . . . . . . . . . . : 192.168.0.1 DNS Servers . . . . . . . . . . . : 192.168.0.1 Lease Obtained. . . . . . . . . . : September 22, 2005 5:55:05 PM Lease Expires . . . . . . . . . . : September 29, 2005 5:55:05 PM

09-23-2005, 04:52 PM	#9 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 29,735 OS: XP-Pro, Vista, Linux Blog Entries: 1	Well, it makes no sense to me. The only way I can see the router allowing all the ports is that you have the machine in the DMZ, or you have connected the router incorrectly. Have you reset it to factory defaults and tried it? __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

09-23-2005, 06:45 PM	#10 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	I have reset it to factory defaults and am not in dmz. I am going to unhook everything and try again. The funny thing is that when I bypassed the router I didn't have to change how I connect to the internet.

09-23-2005, 07:01 PM	#11 (permalink)
Resolution TSF Enthusiast Join Date: Sep 2005 Location: Louisiana Posts: 1,091 OS: FreeBSD/Win98/2000/XP	Does that router allow you to set firewall rules such as this... http://support.dlink.com/emulators/d..._firewall.html

09-23-2005, 08:05 PM	#12 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	yes, I can do that. I was trying to figure that out

09-24-2005, 12:04 PM	#13 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 29,735 OS: XP-Pro, Vista, Linux Blog Entries: 1	The router in it's default configuration should allow very few ports through, 113 is sometimes visible, but little else. Exactly what ports show up open when you're using the router after a factory reset and do the port scan? __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

09-24-2005, 01:38 PM	#14 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	I rese the router and did a all service ports scan and everyone was open except 20,21,80,137,138,139,443 and 445 are all in stealth. I got the same results from my other computer on the network

09-24-2005, 02:18 PM	#15 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	take note as stated in a previous post I get the same results when I bypass the router

09-24-2005, 03:57 PM	#16 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 29,735 OS: XP-Pro, Vista, Linux Blog Entries: 1	This is apparently one I'd have to see. I have an SMC and a D-Link router here, and they work as I'd expect, and my ports are all invisible, except for the FTP port, which I have open for my server. Please post your report here when using the router. GRC Port Authority Report created on UTC: 2005-09-24 at 22:55:58 Results from scan of ports: 0, 21-23, 25, 79, 80, 110, 113, 119, 135, 139, 143, 389, 443, 445, 1002, 1024-1030, 1720, 5000 0 Ports Open 1 Ports Closed 25 Ports Stealth --------------------- 26 Ports Tested NO PORTS were found to be OPEN. The port found to be CLOSED was: 21 Other than what is listed above, all ports are STEALTH. TruStealth: FAILED - NOT all tested ports were STEALTH, - NO unsolicited packets were received, - NO Ping reply (ICMP Echo) was received. __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

09-24-2005, 04:35 PM	#17 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	shields up report ---------------------------------------------------------------------- GRC Port Authority Report created on UTC: 2005-09-24 at 23:34:02 Results from scan of ports: 0-1055 1048 Ports Open 0 Ports Closed 8 Ports Stealth --------------------- 1056 Ports Tested NO PORTS were found to be CLOSED. Ports found to be STEALTH were: 20, 21, 80, 137, 138, 139, 443, 445 Other than what is listed above, all ports are OPEN. TruStealth: FAILED - NOT all tested ports were STEALTH, - NO unsolicited packets were received, - NO Ping reply (ICMP Echo) was received.

09-24-2005, 04:51 PM	#18 (permalink)
Resolution TSF Enthusiast Join Date: Sep 2005 Location: Louisiana Posts: 1,091 OS: FreeBSD/Win98/2000/XP	First off, I have never seen a router automagically block ports that are notorious for being hacker targets, and then somehow leave everything else open. Turn off ZoneAlarm and then run the test. See if they differ when using the router and without it.

09-24-2005, 05:03 PM	#19 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	zonealarm shut off ---------------------------------------------------------------------- GRC Port Authority Report created on UTC: 2005-09-25 at 00:01:58 Results from scan of ports: 0-1055 1048 Ports Open 0 Ports Closed 8 Ports Stealth --------------------- 1056 Ports Tested NO PORTS were found to be CLOSED. Ports found to be STEALTH were: 20, 21, 80, 137, 138, 139, 443, 445 Other than what is listed above, all ports are OPEN. TruStealth: FAILED - NOT all tested ports were STEALTH, - NO unsolicited packets were received, - NO Ping reply (ICMP Echo) was received.

09-24-2005, 05:57 PM	#20 (permalink)
frustratedIam Registered User Join Date: Apr 2005 Posts: 111 OS: xp	I used zonealarm to block all the ports that are open and I still get the same results. Is it possiible shields up is not testing the correct ip?