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  • /etc/hosts.deny ignored in Ubuntu 14.04

    - by Matt
    I have Apache2 running on Ubuntu 14.04LTS. To begin securing network access to the machine, I want to start by blocking everything, then make specific allow statements for specific subnets to browse to sites hosted in Apache. The Ubuntu Server is installed with no packages selected during install, the only packages added after install are: apt-get update; apt-get install apache2, php5 (with additional php5-modules), openssh-server, mysql-client Following are my /etc/hosts.deny & /etc/hosts.allow settings: /etc/hosts.deny ALL:ALL /etc/hosts.allow has no allow entries at all. I would expect all network protocols to be denied. The symptom is that I can still web browse to sites hosted on the Apache web server even though there is a deny all statement in /etc/hosts.deny The system was rebooted after the deny entry was added. Why would /etc/hosts.deny with ALL:ALL be ignored and allow http browsing to sites hosted on the apache web server?

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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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  • port forwarding problem

    - by Claudiu
    I want to set up an svn server on my computer, so it's available from anywhere. I think I set up the repository correctly, using CollabSVN. If I go to Repo-Browser with TortoiseSVN and point it to svn://localhost:3690, it shows the proper repository. The problem now is that I'm behind a router. My local IP is 192.168.1.45 . Doing svn://192.168.1.45:3690 also works. My global IP is, say, x.x.x.x. Just doing svn://x.x.x.x:3690 doesn't work, which makes sense, since I have to set up port forwarding. I'm using a Verizon router. Using their web interface (on 192.168.1.1) I added the following port forwarding rule: IP Address forward to: 192.168.1.45 Source Ports: Any Dest Ports: 3690 Forward to: 3690 Protocol: TCP However, even after applying this rule, going to svn://x.x.x.x:3690 doesn't work. It takes a few seconds to fail, then says that the connection couldn't be established because the server connected to didn't respond properly after a period of time. What's interesting is that a random port, like svn://x.x.x.x:36904 fails immediately, saying that the target machine actively refused the connection. So I figure that the forwarding rule did something, but not fully what was necessary. Any ideas on how to get this working? The router model is MI424-WR and the firmware version is 4.0.16.1.56.0.10.12.3. UPDATE: I also tried setting destination port to 45000, and still forwarding to 3690, in case something was wrong w/ the lower-numbered ports, but to no avail. I also tried port 80 to port 3690, still all in vain.

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  • How to get wireless working (properly) with Sitecom Wireless USB micro adapter 300N on Windows 7?

    - by Timo
    The question says it all, but more detail follows ;) I've got a new computer that runs Windows 7 64-bits (Home Edition) and I'd like to connect it to my wireless home network (Sitecom wireless gigabit router 300N wl-352 v1 002) with a Sitecom wireless USB micro adaptapter 300 wl-352 V2 001. After installing the router (i.e. connected to the modem and power) and ensuring that wireless is indeed enabled, I've installed the driver of the USB adapter on the new computer described above. After the installation (drivers and utility on CD) completes successfull I rebooted my computer and inserted the USB adapter. After discovering the right network and connecting to it using the network key, a connection is succesfully made. (Using the Sitecom 300N USB Wireless LAN utility). In the LAN utility I can see that the signal strength is approximately 50% and connection quality is approximately 80%. Judging from these numbers I assumed that all was fine and started to use the connection (reading news on nu.nl, a dutch news site), but noticed that the connection was lost several times in a very short time span, but each time the connections was resumed, resulting in the 50/80 percent numbers described above. However, the website was not loaded completely and often a timeout would be reported. When inspecting the drivers through Device Management (Windows' Apparaatbeheer in dutch) there were no errors/warnings; everything seemed to be in order. In an attempt to solve this, I downloaded the latest drivers for the USB adapter, but the problems remained. Finally I tried to connect the computer with a Siemens Gigaset USB Adapter 108. This process was a troublesome since I had to download a driver (from the site above) and tell Windows (7) to use the Windows Vista driver when installing the new hardware, since there is (was) no Windows 7 driver available. This resulted in a usable connection, although not very stable when reconfiguring the router. Which took the form of selecting a different wireless channel on the router, even using the Sitecom utility mentioned above to check if there were other networks communicating on that channel (and thus picking a channel that was not used by other networks). Again no result when changing back to the Sitecom USB adapter. Note that this means (I think) that I could use the internet connection with the Siemens adapter, meaning the problem was not in the router. So: How to get wireless working (properly) with Sitecom Wireless USB micro adapter 300N on Windows 7? PS Sorry, but should be able to post one link, while I had links in place for the USB adapter, router and the siemens adapter in place as well, but I'm not (yet) allowed to post these... (The site says I can post one link, but only when no links are present will it allow me to post the question...)

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  • How can we connect TP-link Access Point- TL-WA5210G with Wifi Lan card?

    - by PPS
    I would like to know that, We have a small Wireless Network that covers 40 mtrs indoor. Now we plan to expand our Network Coverage area apporx. 200 Mtrs (Outdoor). Due to our requirement we used TP- Link Access Point TL-WA5210G Outdoor(This AP covers 15Km area). We have 3 blocks between 200 mtrs, We like to connect all the laptops Lan Card directly with required Access-point. What should we do to achieve this, right now we are not getting the full strength signal, when we cross the 80 mtrs. So please suggest me proper configuration for implementing this TP-Link access point. Thanks PPS

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  • Loading guest OS's (Windows) localhost through my host's (Mountain Lion) browsers

    - by Jonah Goldstein
    For work, I have to develop in Visual Studio, which I run via VMware's fusion 5. I really want to test via my mac's native browsers for a multitude of reasons. that is, view the IIs web stuffs that my windows VM should expose, in my mac's own native Firefox, Chrome... etc. if i could expose a pretty url, that would be even better, but i would certainly settle for an ugly IP :) I got a decent number of views but no response when I asked in VMware's own boards. Everyone seems to want to go the other direction (developing in sublimetext/textmate serving up through MAMP and exposing it to windows browsers to test) and there seems to be tried a true solutions for this. unfortunately (or fortunately depending on your preference) my startup is pretty entrenched in the visual studio development tools. I'm really hoping that someone knows the answer to this. Thanks :)

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  • How to bypass vpn talking to VMWare Guest?

    - by marc esher
    Greetings. Network/VPN n00b question here. I'm running VMWare Workstation with a Guest Windows 2003 Server. It has SQL Server 2000 installed. The sole purpose for this Guest is to house SQL Server... it needn't have internet access or access to any other resources on the network other than the host. When launch Check Point VPN software, the host routes through the company network before it connects to the guest ... i.e. it's no longer a direct connection. I assume this is just how things are supposed to work. However, what's happening is that the connection between my host and the SQL Server instance on the guest intermittently drops. It's not consistent, and some databases on the server will be responsive while others aren't. It appears that the databases with the most traffic on the guest (the ones I'm hitting with load tests) are the ones that become intermittently unresponsive. This problem only manifests when VPN is on; when it's off, I can pound away on this database with no troubles. Thanks for any advice!

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  • Monitor mode 802.11 captures on OSX

    - by Mike A
    I'm trying to determine the difference between capturing 802.11 frames in the following ways on OSX (10.8.5). It's a bit esoteric, but I use "Option 2" to capture frames for later analysis, and am wondering if I'm missing something. Option 1: use "airportd": $sudo /usr/libexec/airportd en0 sniff Option 2: use "airport" followed by tcpdump: sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport --channel= sudo tcpdump -I -P -i en0 -w /tmp/capture.pcap (or alternatvely eliminate the -w and watch packets real-time). From what I can tell: Both commands, according to the wifi icon on OSX, put the interface into 'monitor' mode. Both commands output a pcap file that is readable in both wireshark/tcpdump & Eye PA. Both commands appear to capture management, control and data frames. The rub: Option 1 disconnects you from the network. This is expected, when putting an interface into 'monitor' mode. Option 2 does NOT disconnect you, provided you've set the channel to the same channel your currently connected to. This has a distinct advantage of keeping your connection up while capturing in monitor mode. My question: Option 2 does not seem like it should work, or more specifically, it does not seem like I should be able to remain connected while also capturing frames in monitor mode. On a wired NIC, you can be 'promiscuous' and still send frames, though I didn't think the same was true for wireless NIC. I'm questioning the validity of capturing frames w/ Option 2?

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  • Routing and Remote Access Port Mapping not applied to localhost

    - by Computer Guru
    Hi, I've set up Routing and Remote Access (Windows Server 2003) to forward publicip:80 to a server on the private internal network, and that's working great. Incoming requests from the internet to port 80 are correctly forwarded to our internal web server and everything is fine. However, requests on the server itself are not being forwarded. That is, if I open a console window and type "telnet publicip 80" from the server on publicip, the request is not forwarded to the private server. I understand that in RRAS I've mapped port 80 on the public interface to the private server and that's why it's not working; but I don't know how to configure it so that requests from the local PC are also forwarded to the private server. I'd appreciate any help or feedback on the matter. Thanks!

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  • Only 192.168.0.3 can request most files, but anyone can request /public/file.html

    - by mattalexx
    I have the following virtual host on my development server: <VirtualHost *:80> ServerName example.com DocumentRoot /srv/web/example.com/pub <Directory /srv/web/example.com/pub> Order Deny,Allow Deny from all Allow from 192.168.0.3 </Directory> </VirtualHost> The Allow from 192.168.0.3 part is to only allow requests from my workstation machine. I want to tweak this to allow anyone to request a certain URL: http://example.com/public/file.html How do I change this to allow /public/file.html requests to get through from anyone? Note: /public/file.html doesn't actually exist as a file on the server. I redirect all incoming requests through a single index file using mod_rewrite.

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  • Dual-WAN router

    - by aix
    I am looking for a router that would fit the following requirements: Two WAN interfaces: the primary is PPPoE, the secondary will link to a GigE port on another router (a 100Mbps link will suffice); Two (ideally four) GigE LAN ports; No requirement for a firewall; No requirement for Wi-Fi; Inexpensive. The plan for the two WAN interfaces is as follows. All outbound traffic will go to the primary, with exceptions based on destination IP/subnet or possibly on src+dest IPs/subnets. Such exceptions should be routed to the secondary. It would be very nice if, should the primary go down, the secondary would automatically take over for all outbound traffic. I am reasonably sure that I can put something together based on dd-wrt. However, I'd like to hear from you what alternatives are out there (especially something easier to set up for my use case, even if it means paying more for the hardware.)

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  • stunnel: SSL-to-SSL? (for smtp/imap)

    - by nonot1
    Hello, How can I configure stunnel to accpet SSL connections, and connect then to an SSL port on a different server? Here is my setup: Our ISP's server, "Mail Server", supports smtp/imap over SSL. (Not starttls. Just over ssl.) But, I have a bunch of client machines that will only trust a specific, internal, root certificate. Thus, they can not connect to "Mail Server". For these client machines, I'd like to make a dedicated "Mail Tunnel" host that uses stunnel to listen with an in-house signed SSL certificate, and just forward data to "Mail Server" using a 2nd SSL connection. Can this be done? What would be the specific steps for Ubuntu Server 10.10? (I'm not too familiar with persistent service configuration.) Thank you

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  • VLAN setup on my PC

    - by Surjya Narayana Padhi
    Hi Geeks, I am bit new to VLAN. I want my two computers communicate through VLAN. I have following queries. As I am new to it my queries may be somewhat vague in some points. But i would like to hear from experts for my basic queries. I have two PCs Computer A and Computer B in two different IP networks Network A and Network B Both my PC has windows OS installed. How to send a VLAN(#Number) tagged packet from Computer A to Computer B and how to detect and untag the packet at Computer B? (Please provide the steps for windows OS) For this action do I need to check if my ethernet card supports VLAN tagging/untagging? If yes how can I know if my card supports it or not? Is the VLAN applied for Wireless ethernet controllers also? Do I need any switch or router for this action? Experts please given your inputs so that I can have a strong basic. If anyone can give some inputs how i can detect those VLAN in wireshirk, it will be helpful me also. Thanks in advance.

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  • NTOP gives warnings on startup

    - by FR6
    I just installed ntop 1.4.4 and when I start it, it give me infinite warnings "packet truncated": ... RRD_DEBUG: umask 0066 RRD_DEBUG: DirPerms 0700 THREADMGMT: RRD: Started thread (t2992630672) for data collection THREADMGMT[t2992630672]: RRD: Data collection thread starting [p30923] INIT: Created pid file (/var/run/ntop.pid) THREADMGMT[t3086329552]: ntop RUNSTATE: INITNONROOT(3) Now running as requested user 'nobody' (99:99) Note: Reporting device initally set to 0 [eth0] (merged) THREADMGMT[t3086329552]: ntop RUNSTATE: RUN(4) THREADMGMT[t2982140816]: NPS(1): Started thread for network packet sniffing [eth0] THREADMGMT[t2982140816]: NPS(eth0): pcapDispatch thread starting [p30923] THREADMGMT[t2982140816]: NPS(eth0): pcapDispatch thread running [p30923] THREADMGMT[t3047009168]: SIH: Idle host scan thread running [p30923] THREADMGMT[t3057499024]: SFP: Fingerprint scan thread running [p30923] **WARNING** packet truncated (8814->8232) **WARNING** packet truncated (10274->8232) **WARNING** packet truncated (8814->8232) **WARNING** packet truncated (8814->8232) ... Do I need to configure something? I tried to access the web interface (http://localhost:3000) but it does not work. Note: I'm on CentOS. EDIT: Not sure if it helps but there is my "ifconfig": eth0 Link encap:Ethernet HWaddr 00:16:76:BC:7E:77 inet addr:192.168.0.221 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::216:76ff:febc:7e77/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:15496640 errors:0 dropped:0 overruns:0 frame:0 TX packets:19256813 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:836230629 (797.4 MiB) TX bytes:608496148 (580.3 MiB) Memory:dffe0000-e0000000

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  • Windows - Force Wi-Fi to N mode

    - by Frederick Marcoux
    I bought a month ago the D-Link DWA-160 Xtreme N Dual Band USB Adapter and I wonder about the speed. I have a 60Mbps but the speed is never above 300Kbps when I browse Internet or download something. Even from Microsoft or Apple (the fastest server I found). Now on Windows 8, we can see the Wi-Fi stats in Task Manager, there they are: Notice the red rectangle. The signal is 3/5 and I'm about 5 meters far from my router. An Apple Time-Capsule. Also, the connection type is 802.11g, I want N. I made this config in my Device Properties: Does anyone figured out to force the 802.11n in Windows? (Windows 8 preferably)

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  • How do I get the IP Adress of my vpn server

    - by kashif
    I Connect to internet using PPTP connection type from my computer using following setting internet address: blue.connect.net.pk user id: myusername password: mypassword my problem: my dwr-112 router doesn't support internet address name, it rather supports only ip address of the server i.e I'm not able to type blue.connect.net.pk as it only supports server's ip adress. my question: How can I know the ip address of vpn server so that I can configure my dwr-112 router to connect to internet using pptp connection type

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  • How to increase signal/range of your Wi-Fi antenna-less repeater/booster over the network?

    - by kenorb
    I've BT Home Hub in the upper flat (2-3 walls behind) and I'm using WPS Wireless-N Wifi Range Router Repeater Extender in my flat where I'm using my laptop. These are antenna-less devices. Are there any life-hack tricks to increase signal/range of my repeater without buying the new more powerful repeater? I've tried already to move my repeater closer to the ceiling or putting the aluminium foil underneath, but it didn't help. Are there any methods, specific plates or materials which can boost the signal? Specification: Model: WN518W2 Frequency range: 2.4-2.4835GHz Wireless transmit power: 14 ~17 dBm (Typical) Wireless Signal Rates With Automatic Fallback: 11n: Up to 300Mbps(dynamic), 11g: Up to 54Mbps(dynamic), 11b: Up to 11Mbps(dynamic) Modulation Technology: DBPSK, DQPSK, CCK, OFDM, 16-QAM, 64-QAM Receiver Sensitivity: 300M: -68dBm@10% PER / 150M: -68dBm@10% PER / 108M: -68dBm@10% PER / 54M: -68dBm@10% PER / 11M: -85dBm@8% PER / 6M: -88dBm@10% PER / 1M: -90dBm@8% PER Product dimensions: 11 * 6 * 7cm

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  • How do I access my samba drive through several layers of network topology?

    - by stephenmm
    I have a new windows 7 Home Premium machine that is in a different room than my main computer area. As such I have to use a bridge and another router. Everything is working wonderfully except I cannot access the SAMBA drive with the new machine. I know that SAMBA is accessible as an older WinXP machine can access it. A picture of my network would probably be helpfull: To ISP | | +---------------------------+ | WAN | | Cable Modem | | (2WIRE678) | | | | | +---------------------------+ | +---------------------------+ | | (|) (|) +-----------+ | Belkin Router | | | | Wireless | | (F5D) |--+ +--| WinXP | | | |SAMBA USER | | | +-----------+ +---------------------------+ | | | | +------------+ | | Ubuntu | | | Apache + | | |SAMBA Server| | +------------+ | | +---------------------------+ | | | Netgear Bridge | | (XET1001) | | | +---------------------------+ # # +---------------------------+ | | | Netgear Bridge | | (XET1001) | | | +---------------------------+ | +---------------------------+ | | | D-Link Router | | (DI-524) | | | | | +---------------------------+ | | | | +-----------+ | | | Win7 | |SAMBA USER?| +-----------+ More interesting data points: 1. I can ping the SAMBA server from the Win7 machine locally (Ie. 192.168.2.2) 2. I can access the webserver from the Win7 machine locally (Ie. 192.168.2.2) 3. I followed the advice to get Win7 and SAMBA to play nice: http://www.tannerwilliamson.com/2009/09/windows-7-seven-network-file-sharing-fix-samba-smb/ Sorry for being so long winded but it is kind of complex and I am really at a loss as to how to fix it. If any of you have some suggestions I would love to hear it!

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  • How to get access to console to reset Cisco 3750?

    - by genehack
    I acquired two Cisco 3750 switches from another part of my organization. I was able to complete the standard password/config reset procedure on one without any issues -- boot it, put it into express config mode, telnet in, reset the passwords, etc. The second one doesn't ever boot to the point where it displays anything on the console. When power cycled, the 'SYST' light flashes green a few times, then comes on a solid green and stays lit. None of the other lights ever flash or light up. Holding down the 'MODE' button for up to 30 seconds produces no noticeable effects. Nothing ever comes out on the console. Since I was able to configure the first one without any problems, I know my connectinon is good -- console port configured right, good cable, etc. Is this just a hardware problem with the switch? Is there any way I can recover from this and get the switch back into a state where I can configure it?

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  • Router loses connection to internet randomly

    - by tvanover
    I have a Belkin wireless G plus Mimo router and it randomly loses the connection to the internet. It seems to happen for a second or two, not enough to impact day to day browsing. But enough to disconnect games, or stall videos I am watching. It happens whether I am plugged into the router or connecting via wifi. I am unsure if it is my router or Comcast that is causing this issue. If I connect a computer directly to the modem the problem never occurs, so that tells me it is probably the router. But I also had a Netgear wireless router WGR614, and it had the same problem. I don't know where to start looking for the source of the problem. What logs should I be combing through? All my machines are win 7 of varying versions.

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  • IPC between multiple processes on multiple servers

    - by z8000
    Let's say you have 2 servers each with 8 CPU cores each. The servers each run 8 network services that each host an arbitrary number of long-lived TCP/IP client connections. Clients send messages to the services. The services do something based on the messages, and potentially notify N1 of the clients of state changes. Sure, it sounds like a botnet but it isn't. Consider how IRC works with c2s and s2s connections and s2s message relaying. The servers are in the same data center. The servers can communicate over a private VLAN @1GigE. Messages are < 1KB in size. How would you coordinate which services on which host should receive and relay messages to connected clients for state change messages? There's an infinite number of ways to solve this problem efficiently. AMQP (RabbitMQ, ZeroMQ, etc.) Spread Toolkit N^2 connections between allservices (bad) Heck, even run IRC! ... I'm looking for a solution that: perhaps exploits the fact that there's only a small closed cluster is easy to admin scales well is "dumb" (no weird edge cases) What are your experiences? What do you recommend? Thanks!

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  • Router drops internet connection if I connect an additional pc

    - by BluePerry
    Hey, I'm using a SMC2804WBRP-G router connected to my ADSL-modem. Usually there are two computers connected to this router: a win7 ultimate desktop(wired) and a macbook air (wireless). Both working absolutely fine and never caused any connection drops as far as I know. A new room mate moved in last month and each time she starts up her win7 home laptop the router looses the internet connection. The laptop is on a wired connection. The first time she connected to my router, the connection dropped every 2 mins. To find out whats wrong with her machine I disabled all unnecessary services etc. besides the anti virus software. That helped to eliminate almost all of those periodic connection drops. But the start up drop remained and I've got the feeling that the router is still loosing connection from time to time. I haven't had the time to find out what service caused the periodic drops. But I'm more concerned about is that start up drop. Can anyone point me in the right direction to look for the problem? I would be very thankful for any hints or tips!

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  • Get the wireless adapter frequency-band mode in Windows 7

    - by Petr
    I have a dual-band 802.11n router operating in both frequency bands with the same SSID. My Windows 7 laptop has a dual-band wireless adapter. Is there a way to find out which frequency band is the one currently used by the client? Also, is there a way to set the preffered band? Thanks. EDIT1: The router is Linksys E4200 (V2) and I essentially want to keep the 2.4GHz band in the mixed-mode so that the legacy 802.11g devices can connect while allocating the 5.0GHz band for 802.11n devices. The laptop's adapter (Intel Centrino Ultimate-N 6300 ANG) can operate in both 802.11n modes. EDIT2: Related topic

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  • How to test/debug bad network wiring?

    - by Jack Lloyd
    I recently bought a place already wired with Cat 5E (8 ports, leading to a central closet). However attempting to get link, nothing works. On closer examination, it was obvious that the ends in the closet were wired backwards (brown on pin 1, etc). The jacks that I've pulled out of the wall do look to be correctly done. However, testing with a network cable tester shows zero link between any of the jacks and any of the ports in the closet - I had expected to just see a 1/8, 2/7, ... 8/1 mismatch, but instead get nothing at all. The runs are accessible and look neat, though they take some bends that seem quite sharp and are in some cases much longer than they need to be (the person who put this in was a professional electrician but I suspect this was the first time he ran network cabling). My best guess at this point is that he either bought bad cable, or put so much tension on it that he snapped wires. Though it seems surprising/unlikely that I wouldn't get at least one active wire on one of the 8 lines. So, my question: is there anything else I should try or test before I go ripping out everything and running new cable?

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