Solved

Router Chokes-Requires Restart

Posted on 2008-06-17
2
619 Views
Last Modified: 2010-05-18
I have a Netgear FVS-318 v3 router with the latest firmware update. It runs a LAN with five computers, including a Win2k3 server running Mailtraq Mail Server software. This server naturally has the most traffic incoming, with hundreds of mesages per day( need I say, mostly spam). The servers and workstations all function fine, but sometimes at night, usually between 11pm and 2am, the router will choke( freeze). The WAN light works, indicating incoming traffic, but the LAN lights blink in unison, and not in response to the WAN traffic. Of course, the incoming mail stops and Internet access stops also. The only solution so far is to power cycle the router. But, that means that nothing is being received until the morning when I come in and discover the problem.  Any ideas why this is happening and how to prevent or fix it in a  more timely fashion?
Thanks for your help.
0
Comment
Question by:PCGenieLA
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 2

Accepted Solution

by:
karampelas earned 250 total points
ID: 21826331
It sounds that some program is opening connections to too many hosts.
i seems like the connection tracking tables tend to overflow at which point the router no longer knows how to NAT the incoming packets...
Have you tried to check what the logs are saying??
It would also be a good Idea to run any traffic monitoring program on your router to see what is happening.
0
 

Author Comment

by:PCGenieLA
ID: 21953580
I discovered that there actually were two problems; the routers choking and the Mailtraq service stopping. Magically, the router problem seems to have gone away, because for three days now it has not frozen. Maybe it was what I call a "shit storm", a swarm of spam emails that comes and goes and usually trashes everything. As for the Mailtraq. I used Wireshark to monitor the Maitraq server's NIC. I found that after a certain point Mailtraq stopped recognizing the incoming traffic as SMTP traffic. It would also deny connections because of socket limit. On a whim, I increased the number of simultaneous connections allowed and lowered the amount of time reserved for file maintenance to 30 minutes a day at 3am. So far, all has worked flawlessly.
0

Featured Post

Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This solves the problem of diagnosing why an internet connection is no longer working. It also helps identify the likely cause of the lost connection if the procedure fails to re-establish your internet connection. It helps to pinpoint the likely co…
Hello , This is a short article on how would you go about enabling traceoptions on a Juniper router . Traceoptions are similar to Cisco debug commands but these traceoptions are implemented in Juniper networks router . The following demonstr…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question