WRT54GL constant UDP activity on Port 138

I'm using the WRT54GL as an access point behind a firewall. Netbios ports, including 138, are blocked to isolate clients.
On the WRT I've disabled uPnP and set wireless to isolate users. (Assuming this blocks NetBIOS also)
My firewall log shows activity originating with the WRT54GL at 192.168.10.2 every thirty seconds or so directed to 192.168.10.255
The WRT is connected via LAN port, DHCP server is off and connection is via DHCP on the firewall. Not that it should make a difference, but I'm using Monowall.
Any solution would be appreciated. The redundant log is useless.
Thanks

try upgrading / reflashing the router's firmware .. after the upgrade , reset and reconfigure it ..

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Hi:
I have a question. As we know, scanning TCP ports is a lot eaiser than UDP ports because active UDP ports don't respond and there are other reasons as well.
try{
Socket soc= new Scoket(address, portnumber);
catch(Throwable e){ System.out.println(e)}
look at the code above, it can only tell you active TCP ports for the Throwable e tells you nothing about UDP ports. An active UDP port doesn' respond to the connection call "soc". Therefore it will throw an exception(connection refused) after trying to connect an active UDP port. This exception is just like those of closed TCP ports.
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Hi
I wondered what process was causing HD activity every 5 seconds on my system.
File Monitor from Sysinternals reported that the servicelayer.exe performs a series of disk operations every 5 seconds, continuously. It tries to create a directory, fails because directory exists, opens PCCSConfig.dat, does an query on the file, performs three read operations, one query, one read etc ... until after 9 information queries and 32 reads the file is closed - and after 5 seconds the whole process is repeated. A File Monitor log file is attached showing the constant disk access.
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PC Suite: Version 6.83.14.1
Connectivity Cable Drivers: Version 6.83.9.0
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Hi,
I think that it is "functionality", anyway open Nokia Connection Manager and turn off "Serial Port cable"....
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First, please understand I am highly geek-i-ly challenged.
I've noticed that there is constant internet activity (connection icons blinking) when I am running NM.
If I shut NM down, there is no activity.
Question: What kind of activity could this be? Is NM just sending and receiving "confirmed connection" packets or what????
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I have a WRT600N connected to a Scientific Atlanta Model DPX110 cable modem and I'm seeing constant "internet" activity between my router and the cable modem. The intenet activity light is banging like crazy on the router and the "PC/LAN" light on the cable modem is also banging like mad. Have disabled all wrieless interfaces and disconnected every network connection from the router except that of the cable modem. Have also cycled power on both the cable modem and router a number of times just to make sure nothing is stuck in a wierd state. Basically, nothing I have done seems to get rid of this constant activity between the router and modem. I'm pretty sure the activity is not coming in from the WAN side of the modem as I'm not seeing any comparable activity on the modems "Cable/WAN" activity light. Not sure exactly when the behavior began, but I'm pretty sure this was not happening in the past. Also upgraded to the latest WRT600N firmware to see if that helps, but it did not. Any suggestions on how to diagnose what this traffic is between my cable modem and WRT600N short of a network sniffer? Is there some way to make the router log this activity for me to view? I initially assumed the activity was being caused by the router, but now am beginning to wonder if if might be the cable modem doing it... Anyway, any suggestions appreciated. Thanks!

Yeah, I had considered doing that and may still do so shortly. Was just a bit concerned with bypassing the hardware firewall in case the cable modem has somehow been compromised. Thought there might be a way to see what the "internet" traffic is before allowing the cable modem direct access to my PC. Paranoid, I know...
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Constant disk activity; who is doing that?

Hello there,
I pimped my G5 with two new internal drives (WD 1TB Caviar Black) and copied onto them clones of other disks and volumes (with SuperDuper), including my old system. Seems to be quite succesful operation; nearly all works as usual again.
Of course I expected mdimport to do some heavy indexing, with constant disk activity as a result.
But, after a couple of days, there is still constant disk activity: every second or so some 5,99MB is being written to disk, according to Activity Monitor.
I do not understand which app is doing this, for no one seems to be very busy at all.
Any ideas out there?
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I just dealt with this problem effectively on my Mac Pro (Snow Leopard 10.6.4), after considerable mucking around. Hard drive noise, flashing lights, system slow-downs, all driving me nuts (admittedly, a short drive).
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Levi,
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Why is there now unusually high, constant disk activity on my Mac?

Firefox 9.0.1 on Mac OS X 10.6.8 is churning my HD and then must be force quit. It seems to run but there's definately something new and unusual happening here.

Thanks for taking the time to reply.
You are right in that there are a lot of guides around to creating "fake" RAC clusters, however Hunter's guide appears to be one of the best and I found it while browsing around the Oracle website. Of course Oracle stress that it is entirely unsupported and for "education purposes" :)
Well education is what I'm after and I accept that it would perform nowhere near a real cluster. Still the performance issues I'm having appear abnormal.
The background to this is that one the applications I manage at work (Vmware) has a backend DB hosted on RAC. There is an entire database team who look after this area. For my own personal edification I'd like to learn a bit more about RAC (and Oracle in general) and get my hands dirty, though I currently have no long term aspirations to become a full fledged DBA. I'm working through a text on Safari and I thought it would be useful to create a "fake" as you put it cluster at home and play around a bit. Unfortunately the resources to create a "proper" environment are currently not within my means:(
With regards to my problem I was hoping someone here has played around with a similar setup and could advise whether they had similar issues. The 3 days or so I spent labouring through the 60 page guide was far more educational than just reading a text.
I've found that the excessive disk activity appears to be down to my server and Vmware ESXi rather than Oracle. I stopped all instances and CRS and the constant disk activity still continued. I had taken number of snapshots of each linux node during my installation and I'm currently deleting these to see whether this improves things. My hard disk could well be the bottleneck as ESXi is really meant for SCSI controllers and disks if using local datastores.
I'll take your advice and have a trawl through Ebay. I will also install standalone oracle on a seperate box and have a play with that.
Peter

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Ok But when i try disabling the numbers in the forwarding field i run out of spaces in the field to be able to disable them Is there an advanced firewall settings that i dont know about? I put in all of the range forwarding and put the range forwarding start for example 80 originally (TCP ports: 80, 6667, 28910, 29900, 29920
UDP ports: 4321, 27900) The ones i try to disable i run out of fields to disable them in the forwarding for example there are 10 slots for disabling and Im trying to disable them on two numbers 192.168.1.101. and 192.168.1.100 So i need to disable them for both ip numbers I got 10 fields to enter it into them and 10 x 2 is more than the numbers..... You get me?? and on top of that i dont know if what i did was enough Linksys doesnt want to help me without paying 30 dollars so im just thinking i should buy a new router....... i mean they charge 39 dollars for a new router and they want me to pay 39 dollars for tech support it just doesnt make any sense........

T520 Constant disk activity

T520, 4 GB RAM, 500 GB hard drive, Win 7 Pro 64 bit,
Do any fellow T520 users see constant, about one flash per second, hard disk activity. I've turned off the usual suspects, including Windows Indexing Service and all the Intel security and management services and uninstalled Symantec Endpoint Protection 12, which has also been mentioned in certain articles about disk thrashing.
The side effects of this constant disk activity is that the computer will not enter sleep or hibernate due to inactivity, although I can force it manually.I'm also worried about premature disk wear.
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Constant disk activity on 2 node RAC 11g cluster - Can anyone help?

Hi Folks,
My first post on the forum so I hope you go easy with me.
I'm new to Oracle, and thought that the best way to get into it would be to dive in and build an experimental RAC cluster on my home network. To this end I used Jeff Hunter's "Build Your Own Oracle RAC Cluster on Oracle Enterprise Linux and iSCSI" guide.
My only departures from the guide is that I've modelled the architecture entirely within Vmware ESXi on a single quad core Opteron server (HP ML115 G5) with 8Gb RAM and a 1 Tb SATA hard disk. I've also used Openfiler 2.3 for the iSCSI storage rather than the deprecated 2.2. I therefore have 2 Virtual Machines running Oracle Enterprise Linux 5.1, and a 3rd VM running Openfiler 2.3. Each VM has a second virtual NIC connected to an isolated vswitch which functions as the RAC interconnect network.
I've completed the configuration of the cluster and all the checks (as per the article) report that everything is a-OK.
However I've noticed that there is a high rate of disk activity on my server, which continues constantly. I've left the server running overnight and the continuous disk activity is still there! :(
I also noticed yesterday that I could not stop the first instance using either the instance specifc srvctl stop instance -d orcl -i orcl1
or the global srvctl stop database -d orcl. In both cases the command appeared to hang. I had no problems stopping the second instance on the other node though. Not sure whether this is related.
So - does anyone else run a similar "single box" setup, and if you do are you noticing similar constant disk activity? If not could you recommend any troublehooting steps I can take to determine the root cause? While the disk activity is contant, the "bursts" appear random, so it looks like something is going on. Not sure what though! :)
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Peter

Thanks for taking the time to reply.
You are right in that there are a lot of guides around to creating "fake" RAC clusters, however Hunter's guide appears to be one of the best and I found it while browsing around the Oracle website. Of course Oracle stress that it is entirely unsupported and for "education purposes" :)
Well education is what I'm after and I accept that it would perform nowhere near a real cluster. Still the performance issues I'm having appear abnormal.
The background to this is that one the applications I manage at work (Vmware) has a backend DB hosted on RAC. There is an entire database team who look after this area. For my own personal edification I'd like to learn a bit more about RAC (and Oracle in general) and get my hands dirty, though I currently have no long term aspirations to become a full fledged DBA. I'm working through a text on Safari and I thought it would be useful to create a "fake" as you put it cluster at home and play around a bit. Unfortunately the resources to create a "proper" environment are currently not within my means:(
With regards to my problem I was hoping someone here has played around with a similar setup and could advise whether they had similar issues. The 3 days or so I spent labouring through the 60 page guide was far more educational than just reading a text.
I've found that the excessive disk activity appears to be down to my server and Vmware ESXi rather than Oracle. I stopped all instances and CRS and the constant disk activity still continued. I had taken number of snapshots of each linux node during my installation and I'm currently deleting these to see whether this improves things. My hard disk could well be the bottleneck as ESXi is really meant for SCSI controllers and disks if using local datastores.
I'll take your advice and have a trawl through Ebay. I will also install standalone oracle on a seperate box and have a play with that.
Peter

Constant Wireless Activity with L7780

I have an Officejet Pro L7780 All-in-One connected wirelessly via WPA2 to my Linksys router. My computers runs Windows XP Pro SP3 and is hard-wired to the router.
I can print, etc. just fine but there seems to be almost constant communication activity between my computer and printer -- even when I am not printing. I can see the lights flashing on my router which tell me that my PC is talking to the printer every few seconds. I can see corresponding activity on my PC's Ethernet connection as well.
I have the HP Digital Imaging Monitor running in my notofication area.
My question is: Is this almost constant communication activity between my PC and the printer normal? I have never seen anything like it with hard-wired printers or any other printer that I can get to through the router like a shared network printer. If the activity is not normal, how do I go about getting it to settle down and only communicate when I am printing something?
Thanks.
This question was solved.
View Solution.

the Digital Imaging Monitor(DIM) does query the printer regularly for updating the status of the printer. this way it can give you notifications if the printer is disconnected, or if the printer has any problems. if this is affecting the performance of your computer of your internet speed, then it is something to be worried about, though no such issues have been reported before.
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Constant "network activity" in Lion, with NO internet connection

Hey all,
I had searched and read a number of entries similar to this, but never a solution from anyone yet and unsure if someone has experienced this specifically.
I was doing some computer house cleaning and noticed that I had this constant Network Activity happening to the sum of 3-4KB/sec, all day long, regardless.
Switched off wifi...still there.
Rebooted.....still there.
Disconnected all devices, no wifi, no nothing....still there.
No programs running....still there.
Repaired permissions...still there.
Checked Firewall....still there.
Sharing turned off....still there.
Printer sharing off....still there.
Checked and eliminated any start-up programs....still there.
Booted with Snow Leopard drive,(it is only the OS), and noticed NO network activity.
Installed Little Snitch, and honestly have no idea what it is telling me.
So, with a totally cut off Macbook Pro, with no programs running at all, and nothing I can see running in the back ground, no LAN or other sharing or networks....why would there be an unending 3-4KB/sec activity, but none at all in Snow Leopard? Somewhere I have something installed, or a malware program, or something hitting the network regardless of if it is accessible or not.
Anyone any guesses?
Running the last version of Lion, 10.7.5
Thanks all.

Can't believe no one has experienced this?
If anyone could, take a look at your own Activity Monitor and post if you are NOT having this issue in Lion.
Here is a screen shot of AM and the typical constant 3KB/sec in/out. I know it seems like nothing just idol chatter, but it is constant, as in all day long, no matter what. Something seems very not right about that function.
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Replication Active Directory, ports issues in firewall

Hi,
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I am not doing any Port based ACL in the firewall, and there is no static / dynamic NAT-ng used between the server ip ranges (nat 0).
1) what could be the possible issue in this?2) do i need to issue any command in the FWSM Module to make use / open the dynamic ports ?3) How can i make sure that these ports are not opend or not blocked on the firewall.
below are some of the ports used for this, based on the information from Microsoft Team.
tcp 5389
tcp 5722
tcp 5729
tcp3268
tcp 3269
tcp 445
udp 445
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udp 2535
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Sunny

Hi Bro
If you’re not doing any port based ACL in your FWSM, I can only assume you’re permitting the rules between both the AD by IP e.g. access-list inside permit ip host 1.1.1.1 host 2.2.2.2, am I right? I hope you can PING between both the AD, otherwise this could be a routing issue.
Listed below are some commands that you could type to investigate this issue further;
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Perhaps, what you need is to enable the “xlate-bypass” command. By default, the FWSM creates NAT sessions for all connections even if you do not use NAT. You can disable NAT sessions for untranslated network traffic, which is called xlate bypass, in order to avoid the maximum NAT session limit. The xlate-bypass command can be configured as shown:
hostname(config)#xlate-bypass
If the xlate-bypass doesn’t resolve your issue, please do ensure you’ve a static NAT or dedicated nat/global in place.
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FF 18.0.1 constant disk activity after 1 minute with no tabs open

FF 18.0.1 on Windows XP SP3.
Within 1 minute of starting FF I observe constant and excessive disk activity.
I am unable to use any other applications due to the response time.
I have closed all tabs and disabled all plugins.
I have just started a FF "reset to factory default", but pop-up window for "Please wait while Firefox cleans up your old data" has been running for 15 minutes.
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It sounds like you've got some other problems on your computer as well.
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WRT54GL constant UDP activity on Port 138

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