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  • Linux/hostapd: AP can ping clients, clients can access internet, can't access www@wlan1 with more than 5-6 packets at once

    - by mhambra
    Please edit the title, can't make it sound better. -- OP. Hi all, I have a Wifi USB dongle in a PC, that serves as an AP for laptop. wlan1: 192.168.2.1, netmask 255.255.255.0, routed: route add -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.2.1 ping 192.168.2.2 (laptop): ping was ok for lot of packets. Now, I try to access 192.168.2.1:80/myindex.html (apache) from laptop, and can see that own 1kb test page. But, trying to access 192.168.2.1:80/my.jpg, I see the following: GET /my.jpg HTTP/1.1 200 OK <jpg header, about a kilobyte> <TCP packet retransmisson> <TCP packet retransmisson> <end of stream> It seems to be a hostapd's problem (networked stuff worked fine with Ad-Hoc), but it may be also forwarding/routing problem too. What to google for? Even more strange, SSH to that host works fine.

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  • ipconfig /release not working, why?

    - by barlop
    ipconfig /release is not working, why is that? here is a sequence where I put my cable in get an IP, try ipconfig /release and it tells me it can't release wireless, but there is no wireless connection. i'm just trying to release the wired one. C:\>ipconfig Windows IP Configuration Ethernet adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Ethernet adapter Local Area Connection: Media State . . . . . . . . . . . : Media disconnected Fine so I plug my cable in C:\>ipconfig Windows IP Configuration Ethernet adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 0.0.0.0 Subnet Mask . . . . . . . . . . . : 0.0.0.0 Default Gateway . . . . . . . . . : C:\>ipconfig Windows IP Configuration Ethernet adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 192.168.1.8 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.1.254 Fine so from above, it clearly has an iP C:\>ipconfig /release Windows IP Configuration No operation can be performed on Wireless Network Connection while it has its me dia disconnected. C:\>

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  • Unable to connect via NetBIOS Name

    - by grom
    I can't connect to machines/shares by NetBIOS names. Below is console output showing the problem. C:\>nbtstat -n Local Area Connection: Node IpAddress: [192.168.1.100] Scope Id: [] NetBIOS Local Name Table Name Type Status --------------------------------------------- BEAST <00> UNIQUE Registered WORKGROUP <00> GROUP Registered BEAST <20> UNIQUE Registered WORKGROUP <1E> GROUP Registered WORKGROUP <1D> UNIQUE Registered ..__MSBROWSE__.<01> GROUP Registered C:\>nbtstat -A 192.168.1.3 Local Area Connection: Node IpAddress: [192.168.1.100] Scope Id: [] NetBIOS Remote Machine Name Table Name Type Status --------------------------------------------- BRCLAPTOP <00> UNIQUE Registered WORKGROUP <00> GROUP Registered BRCLAPTOP <20> UNIQUE Registered WORKGROUP <1E> GROUP Registered MAC Address = 00-1C-BF-14-B8-6E C:\>ping beast Pinging beast [fe80::59b8:179f:b90b:a63f%11] with 32 bytes of data: Reply from fe80::59b8:179f:b90b:a63f%11: time<1ms Reply from fe80::59b8:179f:b90b:a63f%11: time<1ms Reply from fe80::59b8:179f:b90b:a63f%11: time<1ms Reply from fe80::59b8:179f:b90b:a63f%11: time<1ms Ping statistics for fe80::59b8:179f:b90b:a63f%11: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms C:\>ping brclaptop Ping request could not find host brclaptop. Please check the name and try again. C:\>nbtstat -a brclaptop Local Area Connection: Node IpAddress: [192.168.1.100] Scope Id: [] Host not found.

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  • VM can't connect to outside in bridged mode

    - by Kamal
    Hi Guys, I am not able to ping any machine(not even the host) from Guest VM in bridged mode. But I got an IP which is on the same subnet as host. I can ping my guest VM from the host and can use ssh to connect to the guest. I am using Vmware workstation 6.5. Guest VM is a centos VM and host is windows xp. Every thing works fine in NAT mode. Any clues as to what could be happening. I tried disabling all the firewalls I have.

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  • iptables question

    - by RubyFreak
    i have a small network, with one valid IP and a firewall with 3 network interfaces (LAN, WAN, DMZ). I want to enable PAT on this valid IP to redirect http traffic to a server in my DMZ. (done) I want to enable MASQ on this ip from traffic that comes from my LAN (done) I want from my LAN as well to access my http server at DMZ. (partially) Question: in the above scenario, i cannot from my LAN, to access my http server in the DMZ, since it has the IP used by the MASQ (the only valid ip that i have). What would be the best option to solve this problem? network interfaces: eth0 (WAN) eth1 (DMZ) eth2 (LAN) /sbin/iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE /sbin/iptables -A FORWARD --o eth1 -d 2.2.2.2 -p tcp --dport 80 -j ACCEPT /sbin/iptables -t nat -A PREROUTING -i eth0 -d 1.1.1.1 -p tcp --dport 80 -j DNAT --to 2.2.2.2 /sbin/iptables -A FORWARD -i eth0 -o eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT /sbin/iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT /sbin/iptables -A FORWARD -i eth2 -o eth0 -j ACCEPT

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  • How to address an EC2 instance from both inside and outside datacenter?

    - by Alexandr Kurilin
    I'm trying to find a good way of being able to address my EC2 database instance from both inside and outside of the datacenter. Other EC2 instances need to be able to call into it, and other clients like pgAdmin might need to connect to it from the outside world as well. It's my understanding that using the internal and external DNS names is sustainable long term as each reboot leads to a change. I'm thinking of associating an Elastic IP with the instance and giving it an A record (say db1.mydomain.com) which I then will use both within and outside the datacenter. Further instances in the same role will get the same treatment and a DNS record of db2.mydomain.com etc. Now, is there a cleaner and more stable way of achieving this result? Am going about this the wrong way? Suggestions?

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  • if an outdated, vulnerable but clean Windows machine is connected to network behind router, can it be detected and attacked?

    - by EndangeringSpecies
    suppose the machine is clean of all malware but not in any sense updated, patched, secured etc. Suppose I connect it to the internet from behind wireless router with the intent of using it only on a few trusted sites and only there. Or, for the sake of argument, maybe I wouldn't do any browsing at all, just let it sit there connected to the network. This is all happening in a residential situation with cable internet. In this situation can a remote attacker somehow detect the fact that the machine is connected to the internet and try connecting to do an exploit?

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  • Speed up file access on home network

    - by kurasa
    I have 2 PCs (Windows 7 Ultimate) and a Mac running Windows 7 using vmware fusion on my home network tied together using WRN1000 NETGEAR Router On one of the PC's I have a set of file (MYOB .myo). These use a data source to access the data in the files. Operations (reading,writing) to the .myo on the PC which hosts the files is fine but the other 2 it is painfully slow/unreliable and I am wondering what I can do to speed this up. Some ideas I have are 1. Turn off the Windows firewall on all the windows installations on the home network 2. Buy another router. Specifically a router which I can connect a USB flash drive on the back where I can put the .myo files and all the PC can access the files from the USB flash drive on the router (does this speed things up?) Any advice greatly appreciated on how I can speed up this access to data

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  • Ubuntu getting wrong hostname from DHCP

    - by sam
    When provisioning new Ubuntu Precise (12.04) servers, the hostname they're getting seems to be generated from the DNS search path, not a reverse lookup on the hostname. Take the following configuration BIND is configured with the hostname, and reverse name Normal zone $TTL 600 $ORIGIN srv.local.net. @ IN SOA ns0.local.net. hostmaster.local.net. ( 2014082101 10800 3600 604800 600 ) @ IN NS ns0.local.net. @ IN MX 5 mail.local.net. my-new-server IN A 10.32.2.30 And reverse @ IN SOA ns0.local.net. hostmaster.local.net. ( 2014082101 10800 3600 604800 600 ) @ IN NS ns0.local.net. $ORIGIN 32.10.in-addr.arpa. 30.2 IN PTR my-new-server.srv.local.net. Then DHCPD is configured to hand out static leases based on mac addresses like so subnet 10.32.2.0 netmask 255.255.254.0 { option subnet-mask 255.255.254.0; option routers 10.32.2.1; option domain-name-servers 10.32.2.1; option domain-name "util.of1.local.net of1.local.net srv.local.net"; site-option-space "pxelinux"; option pxelinux.magic f1:00:74:7e; if exists dhcp-parameter-request-list { option dhcp-parameter-request-list = concat(option dhcp-parameter-request-list,d0,d1,d2,d3); } group { option pxelinux.configfile "pxelinux.cfg/pxeboot"; host my-new-server { fixed-address my-new-server.srv.local.net; hardware ethernet aa:aa:aa:bb:bb:bb; } } } So the hostname should be my-new-server.srv.local.net, however when building a Ubuntu 12.04 node, the hostname ends up as my-new-server.util.of1.local.net When building Lucid (10.04) hosts, the hostname will be correct, it's only on Precise/12.04 nodes we have the problem. Doing a normal and reverse lookup on the host and IP returns the correct result Sams-MacBook-Pro:~ sam$ host my-new-server my-new-server.srv.local.net has address 10.32.2.30 Sams-MacBook-Pro:~ sam$ host my-new-server.srv.local.net my-new-server.srv.local.net has address 10.32.2.30 Sams-MacBook-Pro:~ sam$ host 10.32.2.30 30.2.32.10.in-addr.arpa domain name pointer my-new-server.srv.local.net. The contents of the hosts file is incorrect too 127.0.0.1 localhost 127.0.1.1 my-new-server.util.of1.local.net of1.local.net srv.local.net my-new-server So it looks like when it creates the hosts file, it puts the entire contents of the DNS search path into the local address so the FQDN according to the server is the short hostname as defined, then the first domain in the search path. Is there a way to get around this behaviour, or fix this so it gets the hostname correctly? It's picking up the first part of the hostname, then the rest is wrong.

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  • TCP video streaming: TCP throughput(rate) and RTT

    - by misteryes
    we know that a rough estimation of TCP rate is: WINDOW/RTT, where WINDOW is the min(CWIN, RWIN), CWIN is the congestion window size of the sender, while RWIN is the receiving window. nowadays, the encoding rate of videos may be 1000KB/s(8000kbit/s), if RTT is 500ms, it needs the window size to be 2000KB. But we know that usually the receiving window size is below 64KB, there is a big gap. so if RTT is too large, TCP streaming is not possible? Is my understanding right? thanks!

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  • Untangle VPN setup, how to see internal addresses?

    - by NFS user
    So Untangle is setup as the default gateway at 192.168.100.1/24, it is the authorative DHCP server issuing addresses from 192.168.100.100 to 192.168.100.200 and is successfully connected to the Internet. Untangle uses OpenVPN for remote access. Accessing the VPN gives me the address 192.168.40.5. However, I cannot ping any machines on the internal 192.168.100.x network remotely. Clearly, there is something basic that I am missing. What is it and how is it solved? Update: The VPN was not setup with the internal network. Since Untangle only allows editing the VPN setup once, the VPN had to be removed and reinstalled with the internal network exported. Now it works. The lesson is that the internal network must be setup before configuring the VPN.

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  • use network drives as mount points during installation?

    - by ajsie
    is it possible to use network storage locations as mount points during installation? cause i want to separate system (ubuntu) with data (personal files). eg. if i have 5 computers i don't want to recreate /home/david 5 times. so i want to mount networkdrive/home to /home in local ubuntu server. so ALL users home folders could be used and maybe also networkdrive/projects to /projects. in that way its ok if i by accident repartitioned the local ubuntu server cause all data is not there on that server, but in the data server. is separating "data" from "logic" good in this case? and is it possible? what protocol should i use for the mapping over internet? (maybe the server is in Sweden, and the data is in Norway). thanks.

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  • How do I get detailed information about what happens during logon

    - by Funky Si
    Due to my IT department leaving I am now responsible for all our IT systems. I now have several problems to get my head around and fix. I run Active Directory on windows server 2003 and use group policy to apply settings etc. Recently we have had some windows 7 clients added to our network, these are having awful problems with our logon scripts and drive mappings. For the most part my XP clients are working without a problem. What I want to know is what is going on during logon, as running the logon scripts after I have logged on often works. Does anyone know of a way to get detailed log information of what is happening before and during logon. Thanks for your help and any suggestions you have for tracking down the source of these problems.

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  • Why does 1GBit card have output limited to 80 MiB ?

    - by Gallus
    I'm trying to utilize maximal bandwidth provided by my 1GiB network card, but it's always limited to 80MiB (real megabytes). What can be the reason? Card description (lshw output): description: Ethernet interface product: DGE-530T Gigabit Ethernet Adapter (rev 11) vendor: D-Link System Inc physical id: 0 bus info: pci@0000:03:00.0 logical name: eth1 version: 11 serial: 00:22:b0:68:70:41 size: 1GB/s capacity: 1GB/s width: 32 bits clock: 66MHz capabilities: pm vpd bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation The card is placed in following PCI slot: *-pci:2 description: PCI bridge product: 82801 PCI Bridge vendor: Intel Corporation physical id: 1e bus info: pci@0000:00:1e.0 version: 92 width: 32 bits clock: 33MHz capabilities: pci subtractive_decode bus_master cap_list The PCI isn't any PCI Express right? It's a legacy PCI slot? So maybe this is the reason? OS is a linux.

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  • Setup windows 2012 AD in Hyper-V for a Test environment

    - by hub
    Im trying to setup a Windos 2012 R2 test environment on my work computer (a laptop). I have a AD, DHCP and DNS server on server A, and a client connecting to the doman and that works. The client can ping the AD server and gets a valid IP adress. If I ping google.com from the client I get the IP adress but I dont get any responses (request time out). If i ping google.com from server A it works as it should. Server A have a connection to the Internet through a "external network switch" in hyper-v, which gets its internet from a router and the client is connected to a "internal network switch". May the poblem be that server A is behind a router? Can I make this solution to work regadless the network my laptop is connected to? At home i have one IP adress, at work its a totally different range. What I would like is to use my laptops internet connection, regardless wifi or wired, to act as incomming internet, is this possible?

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  • Gmail outage only on one computer

    - by user123079
    Problem: Gmail (and only Gmail) quits working for a period of 5-10 mins only on one computer. Problem occurs several times daily Does not appear to be any "triggering event" - user is simply using Gmail normally when the problem arises User can access their Gmail from other computers on same LAN User can access all other sites, including other Google sites, from affected computer After several mins of outage, Gmail will spontaneously resume normal operation on affected computer The problem occurs in all browsers (Chrome, FF, Safari) Computer: MacBook Pro, OSX 10.7.3, latest browsers I find this very baffling. Any advice welcome.

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  • Configuring network route between two routers on home network

    - by Paul
    I have a home network - the main router connected to the internet (and has wifi) is a Netopia box. Connected to it is a Linksys router. Everything currently works - I can connect via the wireless network and get to the internet. Machines connected to the Linksys can connect with each other and connect to the internet. Both routers are configured to serve addresses via DHCP (Netopia 192.168.1.1 - 192.168.1.99), Linksys (192.168.0.1 - 192.168.0.100). Here's how they are connected: Internet <-> Netopia w/wifi (192.168.1.254) <-> Linksys (192.168.0.1) I decided I really need to allow wireless connections to also communicate with machines behind the Linksys router. Currently the Linksys is configured to obtain an IP address via DHCP. I thought this would be straightforward. I configured the Linksys to have a static IP address: IP: 192.168.1.100 Mask: 255.255.255.0 GW: 192.168.1.254 Then I configured a static route on the Netopia: Network: 192.168.0.0 Mask: 255.255.255.0 GW: 192.168.1.100 So it should now look like this: Internet <-> Netopia w/wifi (192.168.1.254) <-> (192.168.1.100) Linksys (192.168.0.1) I reset both routers. I cannot ping the Netopia (192.168.1.254) from inside the Linksys network, and if I attempt to ping 192.168.0.1 from a wifi connection I get a "Destination host not available" error. Obviously I'm missing something, but I'm not sure where. Any ideas on what I'm missing?

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  • Trouble Connecting to Virtual Machine after IP address Change

    - by David
    I have a VMware image running a copy of Fedora 11 which is hosted on a remote server. The remote server recently had its IP address change. I'm now unable to connect to my virtual machine. The server admin assures me that my virtual machine is running and assigned the new IP address. I have checked the firewalls and had the remote admin restart the VM instance. Neither of these fixed the problem. How do I troubleshoot a remote server which I am unable to SSH to? I'm actually even unable to ping the remote IP (connection timed out).

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  • How can I determine what is killing my network adapter win7 or vista?

    - by datatoo
    I thought this issue was like another person here, and that downloading the nvidia chipset drivers was the solution. However that is not all that is going on. This machine had Vista 64bit and is now Win7. Same issue with both. I have explicitly been denying network driver updates since getting things working again and when a Windows updates occurs on seemingly benign Office updates the adapter fails to work. Is the update process somehow protecting this machine by turning off things and it fails to recover connectivity after a restart? All that seems to ever work is a system restore. Which does work. Since there are 25 pending updates asking to do there thing, I hate to think this is a one by one update test to find the culprit. Any ideas? This has an integrated nic, video, and I guess audio on the motherboard. ES5200 intel cpu on a gateway 4800-05e I am not quite sure how to determine the actual network adapter. This is a wired adapter. I suppose worst case I can try another adapter if this keeps happening.

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  • dnsmasq local network works for some but hostnames are not resolving for others

    - by prggmr
    I have set up a local network and it seems that some of us can use it properly while others can't. The problem seems to be that the local hostnames I setup don't get resolved for everyone. To overview how the network is setup: I am running an Ubuntu 10.01 server using dnsmasq, this server is setup to act as our primary DNS server, configured via our router. dnsmasq is configured using the options of domain-needed bogus-priv I use the /etc/hosts file to determain the hostnames 192.168.1.10 ra.xsi 192.168.1.10 test.xsi From my machine: If I dig the hostnames they resolve properly ; <<>> DiG 9.4.3-P1 <<>> ra.xsi ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61671 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;ra.xsi. IN A ;; ANSWER SECTION: ra.xsi. 0 IN A 192.168.1.10 ;; Query time: 9 msec ;; SERVER: 192.168.1.10#53(192.168.1.10) ;; WHEN: Wed Nov 9 12:28:34 2011 ;; MSG SIZE rcvd: 40 Ping also works: PING ra.xsi (192.168.1.10): 56 data bytes 64 bytes from 192.168.1.10: icmp_seq=0 ttl=64 time=0.834 ms 64 bytes from 192.168.1.10: icmp_seq=1 ttl=64 time=0.699 ms ^C --- ra.xsi ping statistics --- 2 packets transmitted, 2 packets received, 0% packet loss round-trip min/avg/max/stddev = 0.699/0.766/0.834/0.068 ms And login via SSH works using the hostname. For those that cannot connect using hostnames, if I dig from their machine it appears the name is being resolved, but they cannot ping, SSH or http access the hostname. ; <<>> DiG 9.6.0-APPLE-P2 <<>> ra ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12554 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;ra.xsi. IN A ;; ANSWER SECTION: ra.xsi. 0 IN A 192.168.1.10 ;; Query time: 8 msec ;; SERVER: 192.168.1.10#53(192.168.1.10) ;; WHEN: Wed Nov 9 12:05:50 2011 ;; MSG SIZE rcvd: 36 I've been banging my head at this and just can't seem to figure it out.

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  • Configure Wireless Network Card

    - by Skizz
    I recently upgraded the wireless network card in my Ubuntu PC from an 802.11g to an 802.11n. Now, it can't see my router. It doesn't appear in the list of networks that is displayed when you click on the NetworkManager icon in Gnome. Other networks are listed and I have connected to them (no password required!). I'm using the Windows driver through ndiswrapper and it can see the card. I tested the card in a Windows PC and everything worked. The router's log doesn't show any messages coming from the wireless card. What have I done wrong? If you need any more information, just leave a comment and I'll get add it to the question.

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  • Windows Server 2003 port forwarding

    - by Vitor Braga
    Using the "netsh interface portproxy" I added a port forwarding to a Windows Server 2k3. The command "netsh interface portproxy show all" shows the added forwarding. On the other hand, any client connecting to the incoming port will receive a "connection refused" message. netstat also doesn't show the incoming port as listening. The machine firewall is disabled. There is any other way to setup port forwarding on Windows or debugging tips?

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