Lan connection issue

[diogen]

There re DNS issues in parts of USA
Comcast internet down in the midwest, DNS servers to blame again -- Engadget

But it does sound strange. Especially the last bit. How old and what brand/model is your router?

Diogen.

 

[rockymtnhigh]

There re DNS issues in parts of USA
Comcast internet down in the midwest, DNS servers to blame again -- Engadget

But it does sound strange. Especially the last bit. How old and what brand/model is your router?

Diogen.

Well good to know Comcast was having problems.... the router is one year old. Belkin WIreless N router (F5D8235-4 v2000).

All seems normal this morning..... for desktops and laptop, but it makes no sense why I'd have DNS service on the laptop but not on the wired machines. I double-checked to make sure the laptop wasn't on google's public dns (it wasn't).

I am wondering if I'd be better off just putting the whole network on google's public dns. Not certain what the speed impact would be.

 

[rockymtnhigh]

Also looks like comcast's IPs are getting hit with a bunch of persistent port scanning...

=>Found attack from 58.218.199.147.
Source port is 12200 and destination port is 2479 which use the TCP protocol.
Mon Dec 6 01:30:56 2010
=>Found attack from 188.134.42.209.
Use the ICMP protocol.
Mon Dec 6 01:46:56 2010
=>Found attack from 125.45.109.166.
Source port is 12200 and destination port is 27977 which use the TCP protocol.
Mon Dec 6 01:46:56 2010
=>Found attack from 125.45.109.166.
Source port is 12200 and destination port is 8000 which use the TCP protocol.
Mon Dec 6 01:46:56 2010
=>Found attack from 125.45.109.166.
Source port is 12200 and destination port is 3246 which use the TCP protocol.
Mon Dec 6 01:52:36 2010
=>Found attack from 184.106.252.5.
Source port is 65279 and destination port is 27977 which use the TCP protocol.
Mon Dec 6 02:01:23 2010
=>Found attack from 58.218.204.110.

This is just a sample of the security report from the router's admin page.

 

[Foxbat]

Also looks like comcast's IPs are getting hit with a bunch of persistent port scanning...

=>Found attack from 58.218.199.147.
Source port is 12200 and destination port is 2479 which use the TCP protocol.
Mon Dec 6 01:30:56 2010
=>Found attack from 188.134.42.209.
Use the ICMP protocol.
Mon Dec 6 01:46:56 2010
=>Found attack from 125.45.109.166.
Source port is 12200 and destination port is 27977 which use the TCP protocol.
Mon Dec 6 01:46:56 2010
=>Found attack from 125.45.109.166.
Source port is 12200 and destination port is 8000 which use the TCP protocol.
Mon Dec 6 01:46:56 2010
=>Found attack from 125.45.109.166.
Source port is 12200 and destination port is 3246 which use the TCP protocol.
Mon Dec 6 01:52:36 2010
=>Found attack from 184.106.252.5.
Source port is 65279 and destination port is 27977 which use the TCP protocol.
Mon Dec 6 02:01:23 2010
=>Found attack from 58.218.204.110.

This is just a sample of the security report from the router's admin page.

I think you'll find that's the "background radiation" of the Internet. I'm willing to bet that every IP address that's exposed to the Evil "I" (as one of my MCSE instructors called it) sees the same traffic, not just Comcast customers. Pity the poor people whose PCs are sitting on their ISP's connection without a Router running blocking.

 

[rockymtnhigh]

I think you'll find that's the "background radiation" of the Internet. I'm willing to bet that every IP address that's exposed to the Evil "I" (as one of my MCSE instructors called it) sees the same traffic, not just Comcast customers. Pity the poor people whose PCs are sitting on their ISP's connection without a Router running blocking.

Yeah, I kind of figured that. You are totally right. No router/no firewall = a disaster waiting to happen.

 

[Ramy]

Yeah, I kind of figured that. You are totally right. No router/no firewall = a disaster waiting to happen.

I tell people this all the time and they just don't understand.

 

[Kevinw]

I use OpenDNS ever since I had a DNS failure using ATT DSL. I have Comcast cable net now and no issues at all.

 

[Foxbat]

I use OpenDNS ever since I had a DNS failure using ATT DSL. I have Comcast cable net now and no issues at all.

I started using OpenDNS a couple of weeks ago. I'm using the free version set up to block known phishing and malicious web sites. I like that I can review DNS requests and add sites to the blacklist if I see something I don't like.

 

[Foxbat]

Boy, Rocky, what did you start??? I come home from work and get hit with "The Internet's down, I can't get into Facebook.". Not, "Hi Dad, how was your day?" or "Hi Dad, I missed you…" Nope, it was time to put on my LAN management hat. The first thing I did was whip out my iPhone and check my WiFi. That was up and running, so I figured it was him.

That's when I found that the PC downstairs was dead. Hmmm, the plot thickens… I went upstairs and uh, oh: my Mac can't see the Internet, nor can it see anything outside of the bedroom.

So, I am now troubleshooting my LAN. I thought it might be my Netgear Ethernet switch, but when I plugged stuff directly into the Airport, I still can't see the Airport. But I couldn't see other PCs through the Netgear switch, either. Double Hmmm...

Now my Folders are shutting down, so I'm going to have a few bad days until I get my computers back online. At least the iPhone SatelliteGuys App allows me to post this!

 

[Foxbat]

Well, that was bizarre. After reseting my Airport (both my main unit and my Airport Express in the family room) and cycling power on both of my Netgear Ethernet switches (again, one in the family room) I still wasn't able to ping from one PC to another. I finally pulled the power to my two Sling Ethernet-over-Powerline boxes and that seems to have fixed the problem. I'm not sure what was going on, as the only thing the Slings should be doing is connect the basement network hub to the upstairs bedroom switch (I'm still debating on how best to run the CAT 6 cable from upstairs and down two stories to the basement.) But I'm back for now.

 

[rockymtnhigh]

Well, that was bizarre. After reseting my Airport (both my main unit and my Airport Express in the family room) and cycling power on both of my Netgear Ethernet switches (again, one in the family room) I still wasn't able to ping from one PC to another. I finally pulled the power to my two Sling Ethernet-over-Powerline boxes and that seems to have fixed the problem. I'm not sure what was going on, as the only thing the Slings should be doing is connect the basement network hub to the upstairs bedroom switch (I'm still debating on how best to run the CAT 6 cable from upstairs and down two stories to the basement.) But I'm back for now.

Don't let the Bob's know, but Charlie was at fault.

Why, of course, is a totally different issue. My lan issues went away when Comcrap fixed their stuff, although I too remain baffled at how I had DNS service on the laptop but not the desktops....

 

[TheForce]

Hey Roland- I too have had to reset my Netgear N150 at least 3 times a week to get it to see the internet. I think Netgear has a problem with their routers. Glad I only paid $39 for it. My Linksys ( WRT 54G) had a weaker signal than the Netgear N150 but I had to replace it last August after a power surge fried it. Yes, I had it on a surge protector but it failed to protect! I plan to get an N router to replace it some day but for now, when I lose internet connection on my network, I just pull the power on the N150 and it resets in a minute.

 

[rockymtnhigh]

I started using OpenDNS a couple of weeks ago. I'm using the free version set up to block known phishing and malicious web sites. I like that I can review DNS requests and add sites to the blacklist if I see something I don't like.

I just switched over to OpenDNS; did the $10 deluxe home version; I like that I can lock my hormone-driven 13 year old out of stuff like youporn, without having to put NetNanny on his machine. And I get reports via email. Plus the anti-phishing and malware stuff will be useful given how he likes to go to find game cheats online, and those sites are fertile ground for that crap.

Still learning how to maximize use of it, in terms of adding sites to blacklist specific sites.

 

[Foxbat]

Mike,
You could always go into Whitelist mode with the paid OpenDNS, where everything is off-limits, except what you explicitly enable. It does require that you start with a set of "safe" websites and add to them as your family runs into roadblocks. I've debated that, but since I'm mostly interested in blocking the ads and malicious sites, I'm happy with what I've got so far.

Of course, if your son is even slightly tech-aware, and has admin access to the box, all he has to do is put in Google's free DNS servers to bypass all your clever Net sanitizing.

Don,
If you're looking for a good 802.11N router, check out the Airport Extreme Dual Simultaneous Band base station over at the Apple Refurbished store. Paying $179 for a new unit is crazy, but $129 is a little less insane. The units go through QA checks that make sure they are as good as new and they come with a one-year warranty, too. In fact, when I took my Airport Extreme that I had picked up through the refurb'd store in to the Apple store to ask them to check it out, I ended up walking out with a brand new one. +100 for Customer Service.

I'm impressed with the Extreme's coverage. Even though it's in my basement, I get a good signal out on the street in front of my house. I had a Netgear 600-series before this (54G) and I had dead zones one the first floor of my house, let alone outside.

You can also configure a Guest Wi-Fi network that can be firewalled from the Home LAN, plus you can specify that guest units can't see each other. I haven't tried that feature yet, but with Christmas coming up, it might be enabled for all the nieces and nephews and their Wi-Fi capable mobile devices.

 

[rockymtnhigh]

Thank GOD at this point he is NOT smart enough to know that I am blocking stuff via OpenDNS; or to even know what DNS is. But I am just going to see how it goes....

 

[digiblur]

The ASUS RT16 is a good router to get. Put the Tomato firmware on it and you get a ton of features. Great range and 300 N speeds.

 

[Foxbat]

Thank GOD at this point he is NOT smart enough to know that I am blocking stuff via OpenDNS; or to even know what DNS is. But I am just going to see how it goes....

You better check his browser history to make sure he isn't reading SatelliteGuys.US!

 

[dfergie]

Ok, strange problem.... I was sitting on my laptop merrily cruising the internet when my wife complains that her internet (wired on a desktop machine) is down. And sure enough, it is. But wifi was fine. I checked my desktop, no internet. I go to the router and reboot the modem and then the router. Nothing. Nada.

I reboot both machines, says it is connected, but no internet. I can connect to 192.168.2.1 (the router) from the desktop, but nothing else. Why would the wired ports of the Router not see the DNS servers, but the wifi connection does? On a whim I looked up the google public dns servers, and on my desktop I went into internet protocol properties and changed automatically detect DNS to use the google 8.8.8.8 and 8.8.4.4 settings. Bingo. Internet works.

So... any idea what is going on? Is there a problem with the belkin router?

Now to make me go even more insane, on the laptop, I can not find 192.168.2.1??? Grrr...

I was at freinds house yesterday, the desktop is hardwired to the router (Cisco - Linksys) but if they fire up more than 2 laptops it kicks one, including the desktop off... (went into router & tried several things)...

 

[Foxbat]

I was at freinds house yesterday, the desktop is hardwired to the router (Cisco - Linksys) but if they fire up more than 2 laptops it kicks one, including the desktop off... (went into router & tried several things)...

Does the router have the broadband modem built-in, or is there another box connected to the Linksys? The last DSL modem I bought could be run in a "standalone" mode where it provided connectivity to one, and exactly one, IP device. I had to set it to pass-thru mode so my router was able to do NAT and DHCP inside the home network. But it almost sounds like the address pool for DHCP isn't big enough, or maybe a firmware bug on the Linksys that needs to be upgraded.

 

[dfergie]

It's a wireless IP box, I have the same IP but use a Belkin and have had 3 devices going at once with no problems...