Drop connections from specific hosts/nets

Hi all.
I'd like to completely drop connections coming from some specific die-hard UCE mass mailers who keep hammering my mail system.
I blocked their IP ranges in my RAT with connection behavior set to either Reject or TCP refuse, but they keep trying anyway.
Both my boxes get about 50 connections/min night and day from these companies (even if they get rejected on the first box with a 554 error code, i.e. permanent failure, they try on the next box anyway, and try and try again...)
So, is there a way to do this with AsyncOS at the IP or TCP layer ?
Or do I need to do this on my firewall ?
TIA.
PS: I miss Ironportnation. It was so much better than this...

Yeah? OK, I guess I'll block them at the firewall level.
Since I'll end-up droping the connection anyway, it somewhat makes sense to drop it as early as possible.
It would have been nice to keep all mail-related configuration in the same place though.

Similar Messages

Limiting connections from specific host to vips Ace 4710

Hello,
Do you guys know if its possible in the ace to limit connections from a specific host?
For example. if host X does Y connections to one of the vips on the ace, it will be blocked.

Hi Stefan,
That is not possible on ACE. You can define the limits on servers in serverfarm itself but for a particular HOST there is no such provision.
Regards,
Kanwal

Dropping connection from inbound mail

About 2 days ago our server stopped being willing to receive messages from one of our client's outbound servers. Sometimes they receive a message bounceback immediately, other times in several hours or overnight. No changes were made to our server or mail configuration and we are successfully receiving messages from numerous other folks to the same address without issue.
Included below is an excerpt of the mail.log file showing an attempted connect to our server and then "immediate" loss of connection. I have tried restarting the mail service and rebooting the server (10.5.4). Does this look like an issue at our end or their's? If ours, any thoughts on cause and cure? Note also that we're behind a Cisco Pix, but no changes have been there for a considerable period either and the "no fixup protocol smtp 25" is set. We are not running spam filtering.
Any help or suggestions would be much appreciated!
Thanks,
Brian
Sep 10 10:50:33 myserver postfix/smtpd[24513]: connect from bean.electric.net[72.35.23.29]
Sep 10 10:50:33 myserver postfix/smtpd[24513]: lost connection after CONNECT from bean.electric.net[72.35.23.29]
Sep 10 10:50:33 myserver postfix/smtpd[24513]: disconnect from bean.electric.net[72.35.23.29]
Sep 10 10:50:42 myserver postfix/smtpd[24515]: connect from bean.electric.net[72.35.23.29]
Sep 10 10:50:42 myserver postfix/smtpd[24515]: lost connection after CONNECT from bean.electric.net[72.35.23.29]
Sep 10 10:50:42 myserver postfix/smtpd[24515]: disconnect from bean.electric.net[72.35.23.29]
Sep 10 10:54:02 myserver postfix/anvil[24466]: statistics: max connection rate 4/60s for (smtp:72.35.23.29) at Sep 10 10:50:42
Sep 10 10:54:02 myserver postfix/anvil[24466]: statistics: max connection count 2 for (smtp:72.35.23.29) at Sep 10 10:50:32
Sep 10 10:54:02 myserver postfix/anvil[24466]: statistics: max cache size 1 at Sep 10 10:46:27
Here's a bounceback message as forwarded by the client to a different account...if this helps.
Subject: Mail delivery failed: returning message to sender
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
[email protected]
retry timeout exceeded
------ This is a copy of the message, including all the headers. ------
------ The body of the message is 18682 characters long; only the first
------ 16384 or so are included here.
Return-path: <[email protected]>
Received: from 1Kd7Hz-0008HS-T4 by worden.electric.net with emc1-ok (Exim 4.69)
(envelope-from <[email protected]>)
id 1Kd7Hz-0008J3-Un
for [email protected]; Tue, 09 Sep 2008 10:46:07 -0700
Received: by emcmailer; Tue, 09 Sep 2008 10:46:07 -0700
Received: from [66.38.130.1] (helo=cgaowa2.cga-canada.org)
by worden.electric.net with esmtps (TLSv1:RC4-MD5:128)
(Exim 4.69)
(envelope-from <[email protected]>)
id 1Kd7Hz-0008HS-T4
for [email protected]; Tue, 09 Sep 2008 10:46:07 -0700
Received: from CGAEXCH.cga-canada.net ([10.1.10.151]) by
cgaowa2.cga-canada.net ([10.1.10.155]) with mapi; Tue, 9 Sep 2008 10:46:06
-0700
Content-Type: multipart/mixed;
boundary="000_035F790236EE4A418923913476257A9801D869F7DBCGAEXCHcgacan"
From: Cleint <[email protected]>
To: "[email protected]"
Date: Tue, 9 Sep 2008 10:46:05 -0700
Subject: FW: New Notices for You
Thread-Topic: New Notices for You
Thread-Index: AckSGnOB27CoC/P/TSOWwemQb6Es9wAiVymA
Message-ID: <[email protected]>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator: <[email protected]>
acceptlanguage: en-US
MIME-Version: 1.0
X-Outbound-IP: 66.38.130.1
X-Env-From: [email protected]
X-Virus-Status: Scanned by VirusSMART (c)
X-Virus-Status: Scanned by VirusSMART (s)
--000_035F790236EE4A418923913476257A9801D869F7DBCGAEXCHcgacan
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
Message was edited by: Brian Friedrich

Always fun to answer your own question. It turns out that the application of the "no fixup protocol smtp 25" to the Pix seems to have resolved this issue. Very odd I must say, because the "fixup" had been active since setting the unit up years ago... Nonetheless, mail from this client is coming through now (including the backlog...oh joy).

Drop connection from AP1550 - WLC8500

Hi everyone
I´m hopping you can help with a problem I´m experimenting with a wireless lan. I´m working with the WLC 8500 and 7 AP 1550; we already setup this equipments since last year, working without a problem, because there was not much traffic (This WLAN is working on a university). a few months ago we began to experiment a few drop connections from one AP, but 2 days ago, all AP are having drop connection all the time, with latency of more than one thousand miliseconds.
We checked the setup again, and all seens fine, the only thing that we are not sure is about the "load profile" from the 2.4Ghz frecuency, is changing continiously from passed to failed.
All the AP are working as root (no mesh network), all of them are in local mode, they are working at 2.4Ghz, all AP are using the same VLAN (just one).
What can we do with this issue?
Thanks and best regards
Alvaro Rugama

Hello Alvaro ,
As per your query i can suggest you -
Check the vlan settings as well as log-profile logging is turned on.
For more information refer to the link-
https://supportforums.cisco.com/docs/DOC-1176#Access_Points__20xxx_
http://www.cisco.com/en/US/docs/wireless/controller/7.0/configuration/guide/c70rrm.html

Error "421 #4.4.5 Too many connections from your host"

We have deployed a Java application using JavaMail which enables people to send email to their contact lists. It has been in use for a few years, various updates being applied over that time. Most of our customers have no problem. But a couple of weeks ago, two of them suddenly could no longer send emails.
The connection to the SMTP server works but when the application sends email, it gets an error 421. A debugging dump is reproduced below: the target email address is changed to protect the uninvolved; messages starting with **** come from my program, other come from JavaMail.
Can anyone solve this problem? suggest where to look? Thanks.
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp10.bellnet.ca", port 25, isSSL false
220 toip35-bus.srvr.bell.ca ESMTP
DEBUG SMTP: connected to host "smtp10.bellnet.ca", port: 25
EHLO Communications
250-toip35-bus.srvr.bell.ca
250-8BITMIME
250 SIZE 20971520
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "SIZE", arg "20971520"
**** transport connect worked
NOOP
250 ok
**** about to send message to [email protected]
NOOP
250 ok
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
**** cEmailAuthenticator.getPasswordAuthentication() called
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp10.bellnet.ca", port 25, isSSL false
421 #4.4.5 Too many connections from your host.
DEBUG SMTP: could not connect to host "smtp10.bellnet.ca", port: 25, response: 4

Looks like the server keeps track of the number of connections from each machine, and when the number of connections in a certain period exceeds some number, that machine is deemed to be a potential spammer. At any rate it is something you should discuss with the manager of that server.

New Airport Extreme (6th Gen) Dropping Connection from Time to Time.

Problem:
6th Generation Airport Extreme drops connection intermittently at random times.
Set Up:
6th Generation Airport Extreme (main router - no hard drive/not a time capsule) located center of house on the main floor. 2 Range extenders each approximately 30+ feet away from main router. First range extender (Airport Express - newest generation) located on the third floor parallel to main. Second range extender (Airport Express - new generation) is located at the end of the kitchen (main floor).
Main Router is connected straight from a Motorolla Surfboard modem on a foyer table at the center of the house.
Range extenders connected to Main Router wirelessly and at wall outlett height.
Previous Setup:
Same setup as above but, with the 5th Generation Airport Extreme instead of the 6th Generation.
Firmware:
All current versions.
Devices:
1 SONY VAIO VGN-FW490J
HP Notebook G60
Several WEMO outlets
1 iPad Mini
1 iPad 2
1 iPhone 5
1 Motorolla RAZR MAXX
Macbook Pro
iMac (wired from main router on foyer table)
Note: All of these routers/range extenders/modem/computers are plugged into surge protected outlets.
Notes:
With the new Airport Extreme my family and I have been experiencing intermettent connection drops. The amber light on the main router turns on and within a few minutes turns green and connection resumes again. This has been happening for a few days now ever since I purchased the new router. This has not happened before with the 5th generation router, which I donated to our church.
I have not exchanged the product yet. I will be initiating a Complete Power Recycle after some suggested solutions in a bit. I have contacted my Internet Service Provider (Comcast) for a line check and found no problems.
Has anyone found any solutions to resolve the intermittent connection drops? Is reverting to the previous firmware going to solve this?
I would like some insights before trying to do all this. Thank you all for your time.
P.s.
I've done a detailed post since posts like these is frequently asked questions on set-up, devices, connections, etc:

Update:
Before I went to exchange my 6th Gen Extreme, I ran through all possible solutions from complete power recycle to no devices connected. I even went out of my way to my cousin's house to test it out. The same problem still kept coming.
I was able to exchange my 6th Gen Airprt Extreme with another 6th Gen Extreme the other day. I set it up how the instructions told me and within an hour it did the exact same problem as the previous 6th Gen Extreme. I gave up and decided to get the ASUS RT-AC66R (ASUS RT-AC66U is the same, just the 'R' is Best Buy's model.)
The ASUS router is just as great as the 6th Gen Router. You can actually get it down to $180 by price matching to Amazon. The ASUS router has 3 antennas that you can adjust according to where the signal is used more. I pointed them more towards the backyard, upstairs, and the living room. The range is by far better than the Extreme because of this. I was able to drive down a good block (3-4 houses down) and still connected to my router. Also it has 2 USB ports which was fantastic for me so I can plug in my external hard drive and a non-wireless printer. It has many more features that I really liked that I didn't even know was possible. The router utility interface is a bit confusing at first but, it's pretty easy once you get the hang of it.
Some features that I liked with the ASUS was the ability to have multiple guest network with time limits. 3 for 2.4gHz and 3 for 5gHz. I think that Airport guest accounts are only allowed 2.4gHz but not a 5gHz. Though I only needed 1 for each but, I can see this working well for businesses.
Another feature is traffic manager. I am able to set specific bandwith for different types of use such as, high priority 80%-100% bandwith for gaming, medium priority badwith 70%-90% for HD media streaming/data transfer, and 50%-80% low bandwith for casual web surfing. It also has it's own "beamforming" so that data isn't free roamed.
Lastly it has AiCloud sync which is basically like having a hard drive into your router but, much like having a Dropbox at the same time.
More or less I think I'll stick with the ASUS router rather than going with the new Airport Extreme. I think that it's more on firmware issue than it is hardware. If you are not willing to switch to another brand and want to keep staying with Apple, I recommend going back to the 5th generation until a new firmware or rebuilt 6th gen extreme is out.
I have not found any problem with the ASUS router and no intermittent connectivity issues.
Now I am not trying to make you buy the ASUS router. I'm merely expressing how great the product is.
I do have 60 days from Best Buy return policy to try out the ASUS (and report of any malfuntions) and if within that time a new firmware is out for the Extreme. I highly doubt I'll go back to the extreme though.
Hope this helped!!

Apple TV3 dropping connection from iTunes...

Hi there,
I've read a lot of issues on the same thing but I wonder if anyone is having the same issue as me.
Thinking it was a hardware problem I secured a replacement from the store but I'm having the same issue.
I have a PC, Windows 8
BT Infinity (with their home hub, I'm UK based)
My Apple TV is wired directly to the hub (I have also adjusted the settings to give the Apple static IP addresses, I've also tried it with automatic IP)
If I boot everything up from scratch the Apple TV will play both music and my movies (both my DVD rips and those purchased from iTunes store and downloaded to the PC).
However, let's say when I've done the above I decide to watch a movie that is on the PC, it works and I can watch the full film or even a TV program. Then I decide I want to watch another film after viewing that one, that's when I get the spinning wheel. The Apple TV will recognise my iTunes library and display the movies but unless I watch something on the cloud I cannot view what's on my PC hard drive. Then after a bit the Apple is telling me to turn on home sharing. It already is on and my PC has no sleep settings activated, I turned them all off so unless I power down nothing will enter sleep mode or even powersave.
I then have to reboot the PC and open iTunes again.
Like I mentioned I've taken the first one back for an exchange, the same problem persists. I've also been on the phone to Apple who advised to power everything down for 5 minutes then turn the router back on followed by the Apple then the PC. That worked, so I then left it for 5 minutes and then the problem happened again when I decided to watch a film that I put on my PC hard drive. It seems that I have to choose what I want to do quickly but it wont work with further requests after something is played.
I am using the inbuilt virus checker that comes with Win 8 (Elements I think it's called) and I use Windows Firewall. I have tried creating a rule to allow iTunes to connect out on the firewall settings but this did nothing. I've tired automatic IP addresses and now trying static ones but again, no joy. Bonjour has been uninstalled, reinstalled, opened up connections in the firewall, basically everything I've read on this issue I've done.
I read somewhere about turning off the Dolby Stereo, and yes, you guessed it, nothing corrected it.
Has anyone had this problem exactly and any idea how to overcome it. Apple have suggested a clean reinstall of my PC, so I tried it, wiped everything and started again. Nothing, so I tried it on my laptop which has Windows 7 and it seems it's not localised to just one specific version of Windows.
Getting a bit fed up now!
As a last ditch attempt I also checked the serial number to see if it was an old unit that needed to be replaced but it's not. Oh, and I have also tried wireless and wired. That didn't change anything.
One interesting thing though, when looking at the settings for the BT Home Hub and looking at devices, when I know the Apple TV is connected it's showing as not connected. It appears as though it is dropping connection after it has perhaps synced the whole film from the PC. I can't think of a way to force it to stay connected.
Any suggestions?

UPDATE
This is now resolved, not with the use of the Homehub though.
After another conversation with Apple they asked me if the Youtube app on the TV works, which it does then there's a problem elsewhere! Therefore Apple think there's an issue with the hub or the home network. They also asked me to try something on the hub called Port Forwarding. However, because that the hub isn't an Apple product they are not allowed to advise me on tinkering with the settings. But did suggest to Google a website called port forwarding.
Having a look at that I tried what it suggested by connecting to the BT Homehub, you guessed it, that didn't work either. I called BT who advised that their technical help team that would deal with this has been disbanded and the person I spoke to gave me the port forwarding suggestion on Google.
At this stage I had had enough and after reading a few more bits of feedback I then looked at replacing the hub with something I could buy myself. This led me to Amazon where I purchased the ASUS RT-N56U and a modem to go with it. I ripped out the hub and linked the modem to the line in the wall and the router to the modem, I had to bridge the router to the modem and after that was done I set up the wireless.
I'm now very pleased to say that it works, everything is syncing as it should do and the speeds of my downloads have also increased. So far no issues at all. I also have a constant connection to the PC and can view as many films as I want that are downloaded to the PC. No lagging, no problems at all.
Bit of an expensive solution but the modem and router I bought can also replace a Virgin one should I change suppliers in the future.
If you follow this solution and are doing it the same with BT just Google the username for the hubs as it's the same for everyone, you can get that username from the hub if you connect to it but if you're like me and didn't think of that all the solutions you can google. I used the CD's that came with the items and I had it all set up and running in 5 minutes. If you do purchase the RT-N56U don't forget you need a modem, as that bit I forgot about and then had to order that via Amazon as well.
That's really all you need!

Is this possible without PBR - Routing from Specific Host to Any

Hi,
I have an issue where I don't currently have PBR options on my core switch. Now I know I can amend the SDM template and enable the routing one then reboot (I'm also runing ipservices). At the moment though this is not an option.
I have a host - 10.44.129.34 /24 which is a VM.
Current Gateway is 10.44.129.1 which is SVI on our Core.
On the Core I'm looking to say - anything from this specific host going to any remote network - use gateway 10.44.157.6. Is there a way for me to achieve this without PBR?
I cannot amend the IP of the host IP either due to licensing issues with the software I can;t think of a way to do this without PBR.

You can identify the traffic with an extended access list. But I can not think of anything you could do with that to achieve your objective other than PBR.
HTH
Rick

Excluding connections from certain hosts in log file

Is it possible to exclude connections from certain IP addresses from
getting written into the log on a 5.0 server?
I have monitoring systems that do frequent health checks by binding to
the server and it adds lots of lines to my logs (about 14 MB per day)
that I don't need or care about. I'd like to exclude these connections
from showing up.
thanks,
Gary LaVoy
[email protected]

Gary LaVoy wrote:
Is it possible to exclude connections from certain IP addresses from
getting written into the log on a 5.0 server?
I have monitoring systems that do frequent health checks by binding to
the server and it adds lots of lines to my logs (about 14 MB per day)
that I don't need or care about. I'd like to exclude these connections
from showing up.
No, this is not possible
What you can potentially do is to use the log file rotation and do something like a grep -v to supress the lines that you don't want in the rotated file that won't be used anymore by the server.
Regards
Daniel

Getting error in TNS connection from Oracle hosted on LINUX machine

Hello,
We moved our databases from Solaris to Linux servers. I am running one multithreaded process which creates a pool of db connection which are shared by threads. On moving to Linx db I am getting below error message
[SERVERERROR] ORA-12520: TNS:listener could not find available handler for requested type of server
My first port of call to resolve this error was to check TNS_ADMIN and tnsnames.ora but they are fine and then I checked DB in db some of threads got connected and did insert data error usually occured when thread release control of connection and another thread picks up.
Later I changed configuration to run only one single thread and then it works fine without any error. I also tried running same process with configured to create one thread from two different sessions and then one session got this error but other continued.
Here is sqlnet.log file generated
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:09
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=SchedulerDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:10
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:10
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:11
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:11
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:15
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:16
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:16
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:16
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:16
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:16
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:21
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:22
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:22
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:22
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:29
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Fatal NI connect error 12520, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MD1SILNXDB03)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=TRO10G1)(CID=(PROGRAM=HBFCalcImputedObservationsDebug64)(HOST=md1sisun26)(USER=TROBat01))))
VERSION INFORMATION:
     TNS for Solaris: Version 10.2.0.4.0 - Production
     TCP/IP NT Protocol Adapter for Solaris: Version 10.2.0.4.0 - Production
Time: 07-FEB-2012 07:50:29
Tracing not turned on.
Tns error struct:
ns main err code: 12564
TNS-12564: TNS:connection refused
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
ns secondary err code: 0
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Can anybody help me here in resolving this error.
Thanks
Niraj Rathi

user13534563 wrote:
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=MD1SISUN26.jda.corp.local)(PORT=1521)))
Services Summary...
Service "TRO10G1" has 1 instance(s).
Instance "tm4", status READY, has 1 handler(s) for this service...
I dont have permission to check log file of listner running on DB server. I will try to get that. but I do have sysdba rights.Interesting ... you have permission to see the result of 'lsnrctl status', you have sysdba rights on the db .... but you don't have permission to look at a log file?

E4200 dropping connections

my e4200 updated with latest 1.00.1 firmware is constantly dropping connections from the outside to existant lan servers running low traffic services when my machine is using torrent or internet gaming.( call of duty modern warfare )
anyone else with that behavior ?
when will cisco fix this ?
cheers

lordgrinz,
I believe you. I just wanted to point out there are many users not experiencing issues (given their needs and the features they use). Given this, there are perhaps specific scenarios / setups under which the issues occur, some of which may not be Cisco's fault (software or hardware conflicts with equipment from other manufacturers).
For example, when I used my Rosewill wireless utlity (came with my 802.11n USB adapter), it conflicted with something that caused the E4200 to stop broadcasting wireless / lock up on the wireless side.
I stopped using the Rosewill utlity and the issue has not happened again in over a week (I reproduced the issue by reenabling the utlity at one point and within two days I experienced the same problem again).
It also did not happen the first few weeks when I was not using the Rosewill utlity and had occurred another time when I used it right after getting the router (i.e. during the 2 periods of time during which the utility was disabled I had zero issues and the two times I turned the utility back on, the problem occurred again.
(I only liked the Rosewill utility for it's advanced view of wireless networks in my area, including their exact signal strength, channel etc. I think SSIDer, as an alternative, provides this anyway).
That is just one example.
I am not saying the E4200 does not have flaws (I believe there are some documented DHCP issues that some have experienced etc.).
I am only saying that with my setup and the features I use, my E4200 has been rock solid.

WRT110 Drops connection

Good day to all!
My WRT110 drops connection from time to time, once or twice at random per evening + when one of my other PCs boot up.
I have a Synology DS209 NAS wired, a broadband internet connection (through a modem) and several PCs on wireless. In this situation the problem is reproducable: I have connection on PC 1, and when I boot any of the other PCs, the connection drops for 5 minutes (both internet and to my NAS) on all connected systems. After these 5 minutes, every system connects again. All systems have DHCP switched on, and all systems have different IPs just before this happens. I have done a "back to factory defaults" and power cycles, but the problem stays.
When I look with Vistumbler (or NetStumbler), I see drops from 90% signal to 0% once per -say- 5 minutes and irregular.
Do I have a defective router?
Thanks for an answer....
Drogreder
Solved!
Go to Solution.

Turn Off IPv6 Support in Vista
Go to Network Connections folder (click on Start button, then right click on Network, select Properties, then click on “Manager network connections” on Tasks pane).
You should see various LAN, wireless, Bluetooth, high speed Internet, and other network connections available on the Vista computer with the network adapter description. Right click on the network connection that you want to disable the IPv6 interface and select “Properties”.
Click “Continue” on User Access Control permission request prompt.
Clear the check box next to the Internet Protocol version 6 (TCP/IPv6) component in the list under “This connection uses the following items” box.
Click OK when done.
taken from http://www.mydigitallife.info/2007/09/09/disable-and-turn-off-ipv6-support-in-vista/
The Search Function is your friend.... and Google too.
How to Secure your Network
How to Upgrade Routers Firmware
Setting-Up a Router with DSL Internet Service
Setting-Up a Router with Cable Internet Service
How to Hard Reset or 30/30/30 your Router

On the subject of dropped connections..

I have a MBpro 15" CD. I also have a Netgear WGT624 and two WG602v3 (access Points).
I use the 602's to bridge a connection to my living room which has almost no signal when connecting with the WGT624, due to distance issues. Furthermore, I needed a signal boost for my TIVO's USB Netgear wirless adaptor.
Here is what I have noticed:
When connected to the WGT624 I never drop a signal even when I have almost no signal left due to distance from router. However, when connecting to my WG602, the MB drops the signal every 10 min or so, even if i have full signal. My TIVO which is connected exclusively to the same WG602 does not experience dropped signal issues.
I had read about the sudden dropped connections from other MBpro users but I never experienced one untill recently because I almost never connected to the internet using my WG602.
From what I understand there is no solution for the sudden dropped connection. Changing routers will most probably solve your dropped signal issues. I think it's rather sad that one has to resort to that, but hey, if apple wont solve the problem, you have to....
MB Pro 15" CD Mac OS X (10.4.8)

Or there is Thunderbird, another free e-mail client which works very well.
https://www.mozilla.org/en-GB/thunderbird/
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.

Create db connection using specific port!!!

Hi all.
To the point. I need to create a connection to a database. As is required I need to specify the port that the database server listens to. That is done. If I understand correctly the connection created from my application to the database is done by the use of sockets. Is there a way to specify also which port my application will use to make this database connection? That is, specify the port of the database server and also specify the port that my application will use on the machine it is running on.
For security reasons I need to specify which port should be used so that my database machine can be configured to accept tcp/ip connections from specific ip address and port.
Thanks all,
in advance.

dcminter
You have a connection between two computers. That
means that for the communication the packets have a
source ip and source port and a destination ip and
destination port. Lets say that a packet leaves from
the computer were my application is being executed
and right to the database. So we have:
source ip: my computer
source port: unknown (for the moment)
destination ip: database server
destination port: database port
Now, source ip is predefined by the computer (netwrok
interface) but source port is probably randomly
chosen by I don't know who. In the connection url I
specify destination port and destination ip. I want
to specify the source port for security reasons. Is
it possible?Is it technically possible in Java? Yes.
Does your driver support it? I have no idea. Probably not. You'll have to consult the documentation for your driver.
There isn't any other answer to this.

Cannot connect to EM on ODD guest from Windows host

Hello,
I cannot connect to the Enterprise Manager in my guest VM from my host. From a IE v8.0 browser, the recommended link https://192.168.56.101:1158/em fails to connect.
I installed Oracle VM VirtualBox 4.0.4 on a Windows 7 laptop and imported the Oracle Developer Days (ODD) VM appliance. Within the ODD VM I started Enterprise Manager with the cmd "emctl start dbconsole". I confirmed the listener is up and running in the ODD VM.
I checked my Windows Firewall and the MS Telnet Client is allowed through on IP 192.168.56.101 on local port 1158.
Suggestions?
Cheers,
David

Apple Support could reproduce the problem, and provided the solution:
Assuming that VNC is configured in the sharing prefs (under Apple Remote Desktop), it is enough to disable ARD in the sharing prefs. Once you do this (presumably via Apple Remote Desktop) you'll obviously lose your connection.
To restart ARD again from the commandline, connect to your server with ssh and issue the following commands:
sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/k ickstart -activate
sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/k ickstart -restart -agent
now you should be able to connect to your server with ARD again....
.... and all connections with VNC should work as well!!
splendid, thanks apple support!

Drop connections from specific hosts/nets

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