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• Win 7 Netbook refuses to ping JetDirect card (all other PCs work)

  - by Luke Puplett

  I have an odd thing occuring here. From a Windows 7 netbook, I cannot ping an HP printer on the network, while all other machines (Win7/Vista) can. And the netbook can also ping everything else on the LAN. Example showing that the netbook can ping 192.168.3.4 but not 3.6. C:\Users\backdoor>ping w7ue1m Pinging w7ue1m.corp.biz.co.uk [192.168.3.4] with 32 bytes of data: Reply from 192.168.3.4: bytes=32 time=7ms TTL=128 Reply from 192.168.3.4: bytes=32 time=4ms TTL=128 Reply from 192.168.3.4: bytes=32 time=2ms TTL=128 Reply from 192.168.3.4: bytes=32 time=2ms TTL=128 Ping statistics for 192.168.3.4: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 2ms, Maximum = 7ms, Average = 3ms C:\Users\backdoor>ping uktnprint1 Pinging uktnprint1.corp.biz.co.uk [192.168.3.6] with 32 bytes of data: Reply from 192.168.3.0: Destination host unreachable. Reply from 192.168.3.0: Destination host unreachable. Reply from 192.168.3.0: Destination host unreachable. Reply from 192.168.3.0: Destination host unreachable. Ping statistics for 192.168.3.6: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),`enter code here` The IPCONFIG result for the netbook is fine. IPv4 Address. . . . . . . . . . . : 192.168.3.0 Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : 192.168.1.1 Most unusual network thing I've seen in years. I must reiterate that only this netbook is having trouble pinging/printing. Thanks, Luke ** UPDATE ** Am now on a Vista box, and here's the IPCONFIG: IPv4 Address. . . . . . . . . . . : 192.168.3.3 Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : 192.168.1.1 Pinging uktnprint1.corp.biz.co.uk [192.168.3.6] with 32 bytes of data: Reply from 192.168.3.6: bytes=32 time=2ms TTL=60 Firewall is off. I'll look into the chance of an IP conflict because it's the only thing I can think of - compare arp caches of each machine. Cheers!

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• Multiple network connections on a Windows 2008 domain controller (private network for NAS)

  - by Sysadminicus

  I have a Windows 2008 server connecting to an iSCSI target on an OpenSolaris box (yay ZFS!). I'd like to create a private network between the 2 boxes that is totally separate of my Windows domain. What is the best way to configure the additional network adapter on the Windows machine so it doesn't think the new subnet is part of the Windows domain? I want to make sure Windows doesn't magically start spewing active directory communications over the private wire and that it doesn't start poisoning the DNS with IPs from the private network.

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• public key infrastructure - distribute bad root certificates

  - by iamrohitbanga

  Suppose a hacker launches a new Linux distro with firefox provided with it. Now a browser contains the certificates of the root certification authorities of PKI. Because firefox is a free browser anyone can package it with fake root certificates. Can this be used to authenticate some websites. How? Many existing linux distros are mirrored by people. They can easily package software containing certificates that can lead to such attacks. Is the above possible? Has such an attack taken place before?

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• What's the best solution for file sharing in my case? DAS or NAS?

  - by jakub

  I want to have in my network small, cheap and energy efficient server with will be fully customizable (Gnu/Linux, OpenBSD). What is more I want to have big, redundant storage in my network and access to it via server. I have already small terminal without hard drive (no SATA/PATA, one drive on USB) which works fine. I don't want to buy big server, or to use regular computer for that. It's not cheap. I thought about a small case (ITX?), and cheap computer in this with SATA ports, but I cannot find anything interesting :( I thought about NAS in network and server independently and booting server from NAS, I'm not sure which technologies will be good for that, and I don't know what with performance. Direct connection to NAS through network from workstation is next pro for that. What do you think about DAS? It will be good for that?

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• Anyone love/hate the PowerConnect line of switches from Dell?

  - by Rob Bergin

  I am looking at replacing some unmanaged 16 port store bought GB switches and wanted to go with Cisco but it may be cost prohibitive. Instead I am looking at ProCurve or Dell's PowerConnect line up. I am looking for SNMP, Management, VLANs, and SFLOW would icing on the switch cupcake. I would get the 6224 or the 6248 and then maybe add the RPS-600 to it for redundant power. I think the RPS-600 supports multiple switches. Rackspace is also a little challenge so I am trying to do it with as little Rack Units as possible. Ideally I would go with two 6224's or a single 6248 and then do two VLANs. Thanks for any feedback. Rob

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• How to fix massive lag on ZyXEL HomePlug AV powerline adapters?

  - by Tim Abell

  I have 3 ZyXEL Homeplug AV powerline adapters as per the one in the review below. I have two plugged in currently, one into my Be / Thompson wireless router, and one into my desktop pc (box1). every now and then the link indicator on the adapters (the mains link, not the ethernet link) goes nutty, and performance falls off a cliff (see below). http://www.gadgetspeak.com/gadget/article.rhtm/753/479266/ZyXEL_PowerLine_HomePlug_AV_PLA401.html 64 bytes from box1 (192.168.1.101): icmp_seq=1064 ttl=64 time=996 ms 64 bytes from box1 (192.168.1.101): icmp_seq=1065 ttl=64 time=549 ms 64 bytes from box1 (192.168.1.101): icmp_seq=1066 ttl=64 time=6.15 ms 64 bytes from box1 (192.168.1.101): icmp_seq=1067 ttl=64 time=1400 ms 64 bytes from box1 (192.168.1.101): icmp_seq=1068 ttl=64 time=812 ms 64 bytes from box1 (192.168.1.101): icmp_seq=1069 ttl=64 time=11.1 ms 64 bytes from box1 (192.168.1.101): icmp_seq=1070 ttl=64 time=1185 ms 64 bytes from box1 (192.168.1.101): icmp_seq=1071 ttl=64 time=501 ms 64 bytes from box1 (192.168.1.101): icmp_seq=1072 ttl=64 time=1975 ms 64 bytes from box1 (192.168.1.101): icmp_seq=1073 ttl=64 time=970 ms ^C --- box1 ping statistics --- 1074 packets transmitted, 394 received, +487 errors, 63% packet loss, time 1082497ms rtt min/avg/max/mdev = 5.945/598.452/3526.454/639.768 ms, pipe 4 Any idea how to diagnose/fix? I'm on linux so installing the windoze software that came with them is not something I'm terribly keen to do.

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• How to access web server of any machine of my network from the outside

  - by Luc

  Hello, I have an ip like username.dyndns.org, this is the external IP of my router. On my lan, I have several machine (m1, m2, ...) , each running a dedicated web server. Is it possible to reach each machine from the outside with something like: http://m1.username.dyndns.org http://m2.username.dyndns.org ? Do you know what needs to be configured in my router for NAT ? Also, is there a special directive in Apache to do so ? Thanks a lot, Regards, Luc

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• "Automatically Connect" option for Mobile Broadband crashes GNOME Shell, how to remove network configurations?

  - by Kush

  I'm using Fedora 15, in GNOME Shell, my mobile broadband connection was working absolutely fine, until I set the connection type to Connect Automatically using nm-connection-manager. Now, when I start the Fedora, the Top panel network icon shows red exclamation symbol and when I click it, instead of showing me available networks' list, it shows only "Network Settings", and when I open it, it shows GNOME 3's new Network Manager app, and it pops out the dialog saying that, "Current network settings service is incompatible with this version". And after a few seconds of log in, the shell freezes and all I can do is log out using Ctrl+Alt+BackSpace. I'm facing this problem since I opened old network manager app using nm-connection-manager in the run dialog, and editing my connection to connect automatically. After logging in to the shell I somehow managed to delete that connection from the same app and created a new one, but the problem still exists. How can I delete all network preferences (by deleting its configuration files from my home directory or something like that) and reset the GNOME 3's network manager to its default state?

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• subnetting a class c on a cisco 3825

  - by Adeodatus

  I have a class C that I want to better understand before I implement a change. Right now, ip address 192.168.0.1 255.255.255.192 ip address 192.168.0.65 255.255.255.240 secondary So, where is the 192.168.0.64 address in that mix? 192.168.0.63 should be the broadcast for the first one, and 192.168.0.65 should be the cisco secondary ip. And ... How then do I add a /28 (255.255.255.240) right before this segment: ip address 192.168.0.249 255.255.255.248 secondary In fact, I'll probably want to add it as a subinterface Can anyone help me to better understand whats going on and then how to do it?

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• Spoof user agent for GoGo Inflight Internet?

  - by AndyL

  Is it possible to trick the GoGo Inflight WiFi on airlines into thinking that you have a mobile device instead of a laptop? It seems like most airlines that offer in flight wireless these days use GoGo. They offer different pricing for mobile and laptops. It seems like they are checking the browser's user agent. Out of curiosity, is it possible to use a Firefox extension like this one to spoof the user-agent and allow a laptop to access the internet under a GoGo mobile plan? How would GoGo handle something like an IMAP email client, like Thunderbird. Do IMAP clients have a user-agent field as well that would normally identify whether the mail client is running on a laptop or mobile device?

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• LXC container can only access host via bridge

  - by vitaut

  I have an LXC container with i686 Ubuntu 12.04 running on a x86_64 Ubuntu 12.04 host. I've set up a bridge using instructions here. However the ping from the container only goes through to the host and not to other machines on the local network. Similarly only the host and not the other machines see the container OS. The host's /etc/network/interfaces file looks as follows: auto lo iface lo inet loopback iface eth0 inet manual auto br0 iface br0 inet dhcp bridge_ports eth0 bridge_fd 0 bridge_maxwait 0 The container's /etc/network/interfaces file looks as follows: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp And here's the relevant part of the container's config: lxc.network.type=veth lxc.network.link=br0 lxc.network.flags=up Any ideas what I'm doing wrong? Additional info: The output of iptables-save on host: $ sudo iptables-save # Generated by iptables-save v1.4.12 on Sat Oct 26 06:06:48 2013 *filter :INPUT ACCEPT [6854:721708] :FORWARD ACCEPT [4067:538895] :OUTPUT ACCEPT [4967:522405] COMMIT # Completed on Sat Oct 26 06:06:48 2013 # Generated by iptables-save v1.4.12 on Sat Oct 26 06:06:48 2013 *nat :PREROUTING ACCEPT [82235:21547307] :INPUT ACCEPT [16:1070] :OUTPUT ACCEPT [9386:583359] :POSTROUTING ACCEPT [14693:1291952] -A POSTROUTING -s 10.0.3.0/24 ! -d 10.0.3.0/24 -j MASQUERADE COMMIT # Completed on Sat Oct 26 06:06:48 2013 The output of brctl show on host: $ brctl show bridge name bridge id STP enabled interfaces br0 8000.080027409684 no eth0 vethBkwWyV The output of ifconfig br0 on host: $ ifconfig br0 br0 Link encap:Ethernet HWaddr 08:00:27:40:96:84 inet addr:192.168.1.11 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fe40:9684/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:232863 errors:0 dropped:0 overruns:0 frame:0 TX packets:59518 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:34437354 (34.4 MB) TX bytes:198492871 (198.4 MB) The output of ifconfig eth0 on host: $ ifconfig eth0 eth0 Link encap:Ethernet HWaddr 08:00:27:40:96:84 inet6 addr: fe80::a00:27ff:fe40:9684/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:299419 errors:0 dropped:0 overruns:0 frame:0 TX packets:203569 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:59077446 (59.0 MB) TX bytes:372056540 (372.0 MB) The output of ifconfig eth0 on container: $ ifconfig eth0 eth0 Link encap:Ethernet HWaddr 00:16:3e:74:08:2b inet addr:192.168.1.12 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::216:3eff:fe74:82b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:81 errors:0 dropped:0 overruns:0 frame:0 TX packets:113 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:8506 (8.5 KB) TX bytes:9021 (9.0 KB)

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• Very low throughput on 10GbE network

  - by aix

  I have two Linux machines, each equipped with a Solarflare SFN5122F 10GbE NIC. The two NICs are connected together with an SFP+ Direct Attach cable. I am using netperf to measure TCP throughput between the two machines. On one box, I run: netserver and on the other: netperf -t TCP_STREAM -H 192.168.x.x -- -m 32768 I get: MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.x.x (192.168.x.x) port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 32768 10.02 1321.34 The measured throughput is 1.3Gb/s. This is 7.5x below the theoretical maximum, and only 30% faster than 1GbE. What steps can I take to troubleshoot this?

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• Windows XP unknown location popup annoyance

  - by mcgyver5

  I'm plagued by a popup from Windows XP when I use wireless. It says, "You are in an Unknown Location..." It always pops above whatever window I'm using, but does not take focus, so while it does not interrupt my typing, it gets in the way and I can't dismiss it with a keystroke. I'd like to find a way to disable this popup. I've searched in control panel -- Network Connections. I'm not referring to "balloon tips" that appear related to the wireless connection in a new location.

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• Social network for internal company use

  - by khelll

  I'm seeking a social network app for employees in the company that can do the following: allows people to communicate within a company or across everyone on the social network (they can have access to a group or to everyone) post and archive interesting links, documents, etc. start a thread that goes to a group or to everyone lookup people’s info (profile) integrate w email so I can know if someone posts something new or responds to a questions Open source + customized deployment is a plus.

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• Ruckus wireless AP and Dell PowerConnect configuration problems

  - by DanielJay

  We are working on trying to get some Ruckus Access Points to work correctly on our network. Currently our network is as follows: VLAN 10 - Servers VLAN 11 – Computers/DHCP VLAN 12 – Voice VLAN 13 – Guest We use Dell PowerConnect 6248P switches for our switches. Port settings are as follows: ZoneDirector 1100 is plugged into this port. Should be accessing the server VLAN and then allowing all other traffic. interface ethernet 1/g2 classofservice trust ip-dscp description 'Ruckus ZoneDirector 1100' switchport mode general switchport general pvid 10 switchport general allowed vlan add 10 switchport general allowed vlan add 11-13 tagged exit Access point is plugged into this port. The port has to be on VLAN 11 in order to get DHCP. interface ethernet 1/g16 classofservice trust ip-dscp description 'Ruckus - IT' switchport mode general switchport general pvid 11 switchport general allowed vlan add 10-12 switchport general allowed vlan add 13 tagged exit If we tag the traffic from the SSID as VLAN 11 data fails. If we leave the SSID tagged as 1 the data flows correctly. Are there problems with passing tagged traffic to untagged ports? We are looking to see what we can do to get the SSID tagged as 11 instead of 1. Any suggestions?

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• How to get Tenda W322U V2.0 Wireless adapter running on Windows 7?

  - by dircowander

  My Tenda W322U V2.0 Wireless USB Adapter used to work with Ralink drivers and I can't make it work on the new Windows 7. Every time the network adapter is booted, it keeps looking for a driver update and after updating, no wireless connection shows in the launcher in the panel. I was wondering whether the adaptor uses the Ralink chipset at all. Is there a version available with a wider choice of drivers?

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• collectd:Monitoring server not showing clients

  - by Quintin Par

  I have setup a monitoring server with the following setup. <Plugin network> Listen "0.0.0.0" "25826" </Plugin> Now my clients are sending data to the monitoring server(verified through tcpdump). Even the collection folder shows that the data is being dumped /var/lib/collectd/rrd [ec2-user at x rrd]$ ll total 4 drwxr-xr-x 11 root root 4096 Nov 20 17:53 x-web-1.y.com [ec2-user at x rrd]$ I have also verified with find . -mmin 1 to see if its being constantly updated. [ec2-user@x rrd]$ find . -mmin 1 ./x-web-1.y.com/interface-eth0/if_errors.rrd ./x-web-1.y.com/interface-eth0/if_packets.rrd ./x-web-1.y.com/interface-eth0/if_octets.rrd ./x-web-1.y.com/disk-xvda1/disk_time.rrd ./x-web-1.y.com/disk-xvda1/disk_ops.rrd ./x-web-1.y.com/disk-xvda1/disk_octets.rrd ./x-web-1.y.com/disk-xvda1/disk_merged.rrd But when i look it up through collectd-web, I don't see the clients What might be wrong in my setup?

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• How to change 802.1x settings for Wireless in Windows XP SP3?

  - by mspoerr

  Hello, I want to configure EAP-TLS with Machine Authentication ONLY for a wireless network. The supplicant is the bulit-in supplicant in Windows XP SP3. I found the following document: http://support.microsoft.com/kb/929847 - How to enable computer-only authentication for a 802.1X-based network in Windows Vista, in Windows Server 2008, and in Windows XP Service Pack 3 But unforunately the needed command "netsh wlan" is not available in Windows XP - "Note Windows XP SP3 and earlier versions of Windows XP do not support the netsh wlan command." How can I change the settings without the "netsh wlan" command? Thanks, mspoerr

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• Internet doesn't work when enable local Lan

  - by rakesh yadav

  We have the following network setup: A) Router IP 192.168.51.49 B) Windows Server 2008 R2 with dual NIC: B1) WAN interface (192.168.0.2) ( Used for internet) B2) LAN interface (192.168.1.2) ( used for local connectivity) when i keep both LAN Enabled than my internet doesn't work, but if I disabled my local Lan than internet working fine. so please help me how can resolved this issue or should i need to do routing on my server Please find the below attached route print result C:\Users\Administrator>route print =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.51.49 192.168.51.50 276 0.0.0.0 0.0.0.0 192.168.30.227 192.168.30.228 266 192.168.30.224 255.255.255.240 On-link 192.168.30.228 266 192.168.30.228 255.255.255.255 On-link 192.168.30.228 266 192.168.30.239 255.255.255.255 On-link 192.168.30.228 266 192.168.51.48 255.255.255.240 On-link 192.168.51.50 276 192.168.51.50 255.255.255.255 On-link 192.168.51.50 276 192.168.51.63 255.255.255.255 On-link 192.168.51.50 276 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 202.56.230.5 255.255.255.255 192.168.51.49 192.168.51.50 21 202.56.230.6 255.255.255.255 192.168.51.49 192.168.51.50 21 192.168.26.124 255.255.255.255 192.168.51.49 192.168.51.50 21 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 192.168.51.50 276 224.0.0.0 240.0.0.0 On-link 192.168.30.228 266 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 192.168.51.50 276 255.255.255.255 255.255.255.255 On-link 192.168.30.228 266 =========================================================================== Persistent Routes: Network Address Netmask Gateway Address Metric 0.0.0.0 0.0.0.0 192.168.30.227 Default 0.0.0.0 0.0.0.0 192.168.51.49 Default ===========================================================================

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• MSI netbook refuses to connect to home wireless network with Windows XP

  - by sa125

  I'm trying to connect my girlfriend's MSI netbook to the wireless network in my house, and failing repeatedly. It's not a hardware issue, b/c it connects to other networks successfully, and, it's not a network issue, because I have another mac and linux laptops that have no problem detecting and connecting to the same network. When I open windows' network connections box, I can see the network available, and when I try to connect to it (using a password), I get a "network no longer in range.." error (the router is 2 ft away). This has been the case for the past 6 months, and I'm about to give up. I've reset the router, erased all saved network preferences and pretty much all I could think of short of re-installing XP. Any idea what else could be done? thanks.

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• Pros/cons to turning off cable modem

  - by Jay

  A little off the wall perhaps, but ... I have a cable modem and a router for a wireless home network. Is it a good or a bad idea to turn it off at night and during the day when we're all at work or school? Or should I leave it on 24/7. I was thinking that leaving it on constantly makes me more vulnerable to hackers, not to mention wasting electricity. (Though I'd guess the amount of electricity used by a cable modem and a router is probably pretty trivial. Still, every little bit helps.) When I have turned it off and turned it on again, it takes several minutes for it to go through its little dialog with the cable company and get me connected to the Internet again, which is annoying but not a big deal. Anyone know any good reasons one way or the other?

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• Does Guest WiFi on an Access Point make any sense?

  - by uos??

  I have a Belkin WiFi Router which offers a feature of a secondary Guest Access WiFi network. Of course, the idea is that the Guest network doesn't have access to the computers/devices on the main network. I also have a Comcast-issues Cable Modem/Router device with mutliple wired ports, but no WiFi-capabilities. I prefer to only run one router/DHCP/NAT instead of both the Comcast Router and the Belkin Router, so I can disable the Routing functions of the Belkin and allow the Comcast Router to But if I disable the Routing functions of the Belkin device, the Guest WiFi network is still available. Is this configuration just as secure as when the Belkin acts as a Router? I guess the question comes down to this: Do Guest WiFi's provide security by 1) only allowing requests to IPs found in-front of the device, or do they work by 2) disallowing requests to IPs on the same subnet? 1) Would mean that Guest WiFi on an access point provides no benefit 2) Would mean that the Guest WiFi functionality can work even if the device is just an access point. Or maybe something else entirely?

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• disable IPV6 on specific interface with redhat on vmware

  - by DoronS

  I tried to disable IPv6 on specific interface using IPV6INIT=no on the interface script. its working great on all server accept ones that run on Vmware. any idea? im using redhat 5.2, on vmware ESX

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• iPod Touch G4 disconnects from Belkin N+ Router at random intervals

  - by leeand00

  I have an iPod Touch G4 and a Belkin N+ Router F5D8235-4 v2, and for some reason the iPod Touch disconnects from the router at random intervals. Checking the settings in the iPod, it will read that it is still connected to the router, but before I can access the internet again, I have to turn on Airplane mode and then turn it off again to get any program to work with the Internet again. I've tried upgrading the firmware in the router, but that also doesn't seem to help. I'm using the wiresless mode 802.11b&802.11g&802.11n in the 20/40MHz frequency. Is there any way of fixing this issue? It doesn't happen with any of the other devices that are connected to the router. This post has been cross-posted here

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• Open mysql only to localhost and a particular address

  - by Rodrigo Asensio

  My config: ubuntu server 9 and msyql 5 my.cnf = bind-address = 0.0.0.0 my iptables script = iptables -A INPUT -i eth0 -s 99.88.77.66 -p tcp --destination-port 3306 -j ACCEPT I can connect from any place to mysql, not only that IP. I made a iptables-save , /etc/init.d/netwokring restart... but I still can connect from any IP, any clue ?

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