I have an application, a solar power plant, where communication cables (Cat.6 UTP) are run close to power cables. We've had a lot of failures in the past due to multiple reasons, electrical noise, surge, etc so we decided to change to Cat.6 SFTP. The problem is that now , even with proper termination of the shielding at either one or both ends, the noise is so bad that packet loss is above 90%.
View 8 RepliesComparing my brand new linksys x3000 (Firmware Version:v1.0.03) with my old zyxel p660hw I see that the linksys is running a downstream noise margin of 8.2dB while the old zyxel is running a downstream noise margin of 15dB. Needless to say, I am very disappointed. why the linksys value should be so much lower?
View 5 Replies View RelatedThis has been driving me absolutely crazy but I am glad to have found the source of it. Over the past 4-5 weeks ever since i built my new computer, my computer has always had this wierd high pitch noise. I dont know if its coil whine or not, but the sound signature is def not the same as the coil whine that comes from my 7970 card. It sounds more digital.
What could be the cause of this? And what would the remedy be? My ethernet cable is approx 60 ft so it will be a pain in the ass to replace. Or buy another NIC?
edit: forgot to mention....the noise is constant. Not intermittent with usage. No amount of load or idle on the network changes the noise.
Obviously you do not want your cat6 lines running too close to your power lines especially when in parallel. The question though is how close can it be without causing interference?In my situation the wall I want to connect my main router to has a power outlet in the middle of it which honestly is where I would have preferred my network ports. Will I be OK if I run my cat6 in the wall channel directly next to the channel that contains the power line? It would be a standard U.S. interior wall residential power line. I should be able to get from 12 to 24 inches of distance between my cat6 and power line while still keeping my network outlet in a semi-central location.
View 1 Replies View RelatedIn official information for SG300-28p noise level is 40.6 dB, but in fact its too noisy. Is it possible to change speed of fans? I use only 8 PoE ports.
View 1 Replies View RelatedThe WAG120N makes a cracking noise on the conventional telephone.
View 1 Replies View RelatedThe WRP-400 router has two phone ports - does it support direct calls between them?
View 1 Replies View RelatedI have noticed that in my router log that the router opes a port automatically without any human interaction and after some the time router closes the port again.Here is the log file of my router that opens the port and close it after a couple of hours.
LOG------------------------------
Tue, 2010-02-09 10:02:16 - AddPortMapping: external NULL:3658 to 10.1.1.253:3658 protocol UDP for: 10.1.1.253:3658 to 3658 (UDP) with timeout:0Tue, 2010-02-09 10:02:16 - no permission rule matched : accept by default (n_perms=0)Tue, 2010-02-09 10:02:16 - redirecting port 3658 to 10.1.1.253:3658 protocol UDP for: 10.1.1.253:3658 to 3658 (UDP)Tue, 2010-02-09 10:02:16 - creating pass rule to 10.1.1.253:3658 protocol UDP for: 10.1.1.253:3658 to 3658 (UDP)
.....
Tue, 2010-02-09 12:52:59 - DeletePortMapping: external port: 3658, protocol: UDPTue, 2010-02-09 12:52:59 - removing redirect rule port 3658 UDPTue, 2010-02-09 12:52:59 - Trying to delete rules at index 0
I have a small network of 4 x 3750s running routing (OSPF) which contain all company firewalls. It bridges internal trusted corporate networks (depots etc) to external untrusted networks (Internet/Datacenter networks). It sees a fairly high level of traffic running through it (it gets forwarded to firewalls at gig speed).OSPF is costed to remove asymetric routing so one 3750 is acting as primary and does most of the work. The 3750s are in area 0, and all other areas are summarised to some degree. However, CPU is running high on the 3750 when looking at the history at times: [code]
although the average is around 26% the 72hour picture would suggest that CPU is running at 100% at times. Is this an imminent concern that needs re-designing, or is this normal behaviour (SPF running for instance) that is manageable?
we have 2 catalyst 4507 Switches (Catalyst 4507-R running 15.1.2.release) configured in VRRP and vlans are distributed across both the switches.For few vlans core1 is master and for remaining vlans core2 is master.Both cores showing different CPU utilization.when we did our troubleshooting,we realized that the server vlan on core1 (Core1 is master for this vlan) is creating high utilization.when we switched this server vlan to core2 the core1 utilization came down and core2 utilization increased.we identified that server vlan is culprit in this issue. i would like to know weather any method is available in core switch wherein i can check which server in this vlan is contributing for this utilization.(To identify the server which contribute this utilization,we can actually shut 1 server each at time to see weather utilization is going down.with this kind of testing ideally we should be able to identify the server but this will disturb the server environment which we don't want in live environment)
View 8 Replies View RelatedI am looking to upgrade my home wifi from a Linksys WRT54G running DD-WRT to something that will handle .11n. I've been looking at the Unifi PoE APs. Their base model support N, but only on 2.4GHz, and only has a 100Mb port. I was concerned about that being a limiting factor. They've recently released a new line that supports Dual Band and has a Gig port, but it cost about 4 times as much. Here are my goals:
1.) PoE if possible. Currently the AP is my rack in the basement. I'l thinking of running an additional cable to somewhere central on the first floor and putting the AP there for better coverage/signal. Running just a CAT 5e cable is much easier than having to supply power as well. Second thought was to get two Unifi APs and setup a mesh with roaming, which it looks like they support, for best coverage. In that case I'd put one in a top floor room that already has CAT 5e.
2.) I'd really prefer access points to a router. I already have a pfsense box that does the routing. If this means getting something that will run DD-WRT, Tomato, or the like and turning it into an AP fine.
3.) I would like something that is dual band .11n.
4.) Something that support RADIUS
5.) Multiple SSID support and VLAN support. I want to be able to offer at least 2 separate networks.
So am I stuck buying the Unifi dual band AP? Or should I get something like the Asus RT-N66U and put Tomato on it?Does anyone have acutal expreience with the Unifi products?
The modem checked out and was all good, the splitters are brand new and the line is apparently fine.This left the router as the issue. We had a Netgear router and attempted to replace it with a Linksys router.The firmware on both routers have been tested both old and new firmware.This happens to all computers/laptops connect to the network I do not receive a message stating that I was disconnected from the network, the internet simple cuts out for a little while and then comes back in.Cox says that they are 100% certain it is not on their end, nor is it the modem.The disconnects occur at random (there is no specific intervals). They last anywhere from 30 seconds to 10 minutes.
View 8 Replies View RelatedIt's exactly the same situation like was described in link below in... 2008 on different forum.PS3 doesn't see the NAS in Wi FI.
1. X3000 Annex A with latest firmware v1.0.01 build 002 Nov 22,2011
2. NAS Zyxel NSA310 with latest firmware 4.50(AFK.0)D0_20120405 running Twonky Media Server (TMS) Twonky 7.0.5 Special connected to X3000 via network cable.
3. Sony Playstation 3 (PS3) with latest firmware 4.11 connected to X3000 via WIFI.
When PS3 is connected via WIFI to X3000, TMS is not visible in PS3. When PS3 is connected via network cable to X3000, TMS is visible and working as hell. No static IP's, whole network based on DHCP. UPnP is ON.Problem mentioned on that different forum was solved by firmware update. Can I expect firmware update also here?
I set up my new WAG320N yesterday. I have no problems connecting with my notebook running windows 7 or my IPad. My Mac Mini running Mac OS x version 10.6.6 simply won't connect.
View 1 Replies View RelatedI have a ADSL modem with a wi-fi router connected to the internet. I want to connect my Belkin F5D8233-4v3 to the router wirelessly and use it as an Access Point to extend the range of my home wi-fi setup. How do I configure the Belkin to connect to the adsl router over wi-fi without running the cable?
View 1 Replies View RelatedI have a situation where my Cisco 5508 did not come with SFP by default.
Can i use the SERVICE PORT to connect the WLC to the Switch
1. the controller has 8-SFP Slots
2. one service Port
3. On redundant Port
How can i connect my PC with laptop with LAN cable for high speed file transfer?
View 2 Replies View RelatedI set up a connection from a laptop (Windows 7) that goes through a LAN proxy server to a secure ftp server (Windows Server 2003).The sftp server is assigned a public ip address.I opened the firewall at the destination and allowed port 22 traffic to the sftp server. Well, the connection is failing.I know for a fact the connection from the client laptop is making it to the sftp server.If I issue this command on the client laptop:
telnet sftpserver 22
The DOS screen clears and tells me the type of SSH server I'm connecting to. While this connection is still active, I logged into the destination sftp server and did a netstat command. I can see the address of the proxy server in the "Foreign Address" column of the netstat results. I also can see the proxy server address when I look at the Application Log on the sftp server, so I know the connection is making it to the sftp server.
I beleive the problem is the control port (return traffic) from the server back to the client. Something is being blocked or is misconfigured. I always thought the router negotiated the control port, and that the control port didn't need to be put into any firewalls.
There are many software available for this but the issues is how they all function. Example: One software Synchronized FTP allows you to set a local/remote folder and sync files between them. What was never disclosed is that you need Windows Task Scheduler to run the synchronization, and you do not see a progress indicator. I also tried TurboFTP but it felt like landing a space shuttle.
View 8 Replies View Relatedhow to actually run a .bat on a remote computer through ssh/sftp in a GUI. My problem is that I havent been using command lines for 15 years, I litterally have never used a command line besides using stuff like ipconfig in command prompt.I have a ssh server on my home server using FreeSSH'd and The only ssh program i can find with a gui is winscp. Though theres no option to connect through ssh everyone says it does and theres even options for it.
Though when i try to run the bat file i get this error"Current sftp -3 session does not support command you request" then something about a seperate shell session. if i click ok it goes down to starting the session then just sits there and says host is not communication for more than 15 seconds still waiting and only option is to abort.
Any problem while using SFTP option in ACS5.3.I am trying ot use host-key sync command but giving below error.
ACS/admin(config-Repository)# host-key sync
% Error: First character must be a letter
% Error: Invalid ip address or hostnameSOK-S12-ACS-1/admin(config-Repository)# host-key sync% Error: First character must be a letter% Error: Invalid ip address or hostname
As per documentation this command needs to be added directly.
i am running windows server 2008 with the hyper V role installed.i have installed windows 7 Professional as a guest OS. assigned 2 GB of Ram to the machine. the point behind the VM is to virtualize my FTP server and incase a format is required i have the VM file on my 2nd partition, host OS on another. i use Cerberus FTP Server on the Win7 OS. i configured the server to accept SFTP and TLS connections. on the host OS i installed Fire FTP and File Zilla, both Clients will at max download a 4 MB file at 64 KB/Sec .. i have seen both jump to about 80 KB but was only a split second and never held.. however if i login without SFTP and transfer over standard protocol, i download at 1 MB/sec. which is my normal speeds. would this be only to the encryption process?, in the Cerberus Server there are options to adjust download speeds, i have left it default, and altered it to allow its max configuration. My ISP is not limiting any connections that shouldnt be.
View 1 Replies View RelatedWe have ACS 5.3, and trying to set up sftp backup on freesshd server. SSH connection works, but ACS cannot copy backup file to sftp server, we get following errors:
Acs.MGMT.ACSVIEW Backup failed: CARS_XM_SSH_CONNECT : -306 : SSH connect error
FTP backup works fine.
I am not able to backup ACS 5.x server by means of SFTP protocol. We use ACS 5-2-0-26-2. My configuration of repository is:
repository SFTP
url sftp://x.x.x.x/home/user
user user password hash 455ad
command 'backup acs01 repository SFTP' does not work and I receive the following error message on ACS server:
%SSH connect error
On my sftp server I can find the following error messages:
Apr 6 06:57:46 CR01 sshd[8561]: Accepted password for user from 10.20.86.72 port 47924 ssh2Apr 6 06:57:46 CR01 sshd[8563]: Received disconnect from 10.20.86.72: 11: disconnected by user
How to successfully performed backup by means of SFTP protocol? Do I need any other configuration settings except repository? Do I need to store my SSHD RSA key to ACS? I am able to copy files using SFTP from other computers, so it seems that SFTP server is set correctly.
What size fans these are and/or had experience replacing them with something quieter?
View 15 Replies View RelatedI need opening up some ports for a sftp client at work. software version 8.0 (3) device manager version 6.1 (1)
View 4 Replies View RelatedI just purchased a Netgear router and installed it like it said on the directions. I have internet through Time Warner Cable. I did have a crappy phone before I got the router and it made a popping noise on it too, but I got a new phone and it was fine. But after I installed the router the phone makes a popping/clicking noise and it will also disconnect the wi-fi signal and I have to restart the router.
View 4 Replies View RelatedEvery 30 minutes we get a constant beeping noise from our router that lasts about a minute.
View 2 Replies View RelatedI installed a wireless adapter on my pc and since then when I play a game online or watch something online there will be times when the sound will be weird and noisy for a slight second along with the slowed visual. Also I noticed that it awakes the wireless printer from sleep mode. Could it the wireless adapter be interfering with the wireless printer? I tried to adjust wireless antenna but it didn't do anything.
View 2 Replies View RelatedI've bought a new Cisco 886VA and want to set the noise-margin value. With my old 876 I had to set "service internal" and then I was able to configure the value unter ATM inter config.
But with the new 886VA I can't find a way to configure it.
Have cisco ASA5520 on place and i want to configure it to access my webserver outside of my network throught sftp/ftp with filezila what command to add so as port/service associate to it should be able to run?
View 1 Replies View RelatedAfter we have installed patch 5 on several ACS 5.2 server they aren't able anymore to write their backups to the sftp servers. I tried to search on the bug tool kit, but it seems to be broken when searching for the keyword "sftp". It's the same when I try to do a "copy logs" with sftp as destination.running a debug I can see,
acs/admin# copy logs sftp://10.1.115.11/,Collecting logs...,Username: backupuser,Password: ,6 [16376]: transfer: cars_xfer.c[301] [admin]: sftp copy out of /var/tmp/ADElogs.tar.gz requested,6 [16376]: transfer: cars_xfer_util.c[412] [admin]: resolved server to 10.1.115.11,7 [16383]: transfer: sftp_copy.c[75] [daemon]: Executing SFTP command: /usr/bin/scp -o StrictHostKeyChecking=no /var/tmp/ADElogs.tabackupuser@10.1.115.11://ADElogs.tar.gz,% Error: Transfer failed3 [16376]: transfer: sftp_copy.c[230] [admin]: sftp_copy ERROR: command execution failed,3 [16376]: copy: cm_copy.c[1226] [admin]: Logs archive transfer to url sftp://10.1.115.11/ failed retcode=-306,acs/admin#
I have just replaced my 54Mbps Wireless-G router (Sky Broadband/Netgear - black, looks like a SkyHD box) with a 300Mbps Wireless-N TP-Link TD-W8960N router, I have also upgraded the the standard 3dBi antennas with a pair of TP-Link ANT2408CL 8dBi high-gain anetnnas.
However when using various WiFi analysis apps I'm getting a signal strength averaging -35dBm and noise of -96dBm when in the same room as the router. But the main bit confusing me is that this is in ALL configurations - with my old Wireless-G router, with the new Wireless-N w/ 3dBi antennas, and with the new Wireless-N w/ 8dBi antennas.
Am I misunderstanding the signal/noise thing or is this Wireless-N router not giving me a better signal at all? I plan on installing an identical setup in a property with patchy Wireless-G coverage next week and I was hoping this exact kit would be the solution.I have tested with two laptops and I am getting 130Mbps link with both, but I understand this is typical of laptop hardware. I don't have any devices with a certified 300Mbps card installed to test with.