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• SSL Proxy: Forwarding without the encryption

  - by John

  I have a python application listening on port 9001 for HTTP traffic. I'm trying to configure Apache (or anything, really) to listen on port 443 for HTTPS connections, and then forward the connection, sans encryption, to port 9001 on the same machine. My application would then reply via the proxy, where the encryption would be reapplied, and returned to the client transparently. I'm not doing anything crazy with the site names and SSL certs, I have one public IP, one hostname, and one SSL cert. Stripping the encryption at the proxy doesn't seem to be a common requirement. Is what I'm asking for a normal requirement? Are there other concerns with this sort of configuration?

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• Add power over Ethernet without new switches?

  - by dannymcc

  I need to power 16 IP phones over their Ethernet connections. I am in the process of changing our switches and only the phones need PoE, everything else is powered by mains cables. I have contacted the supplier of the phones and for 16 mains leads it will be close to £300. I know it's possible to get a PoE injector that goes between the mains and the phone but I would like to do this as tidily as possible and ideally in bulk. I imagine something that looks like a switch but doesn't actually 'switch' if that makes sense. Basically I want to inject power to 16 devices at once.

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• Detecting man-in-the-middle attacks?

  - by Ilari Kajaste

  There seem to be many possible ways to create man-in-the-middle attacks on public access points, by stealing the access point's local IP address with ARP spoofing. The possible attacks range from forging password request fields, to changing HTTPS connections to HTTP, and even the recently discovered possibilit of injecting malicious headers in the beginning of secure TLS connections. However, it seems to be claimed that these attacks are not very common. It would be interesting to see for myself. What ways are there to detect if such an attack is being attempted by someone on the network? I guess getting served a plain HTTP login page would be an obvious clue, and of course you could run Wireshark and keep reading all the interesting ARP traffic... But an automated solution would be a tiny bit more handy. Something that analyzes stuff on the background and alerts if an attack is detected on the network. It would be interesting to see for myself if these attack are actually going on somewhere.

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• Where to begin with IPv6 [closed]

  - by Willem de Vries

  I am fairly familiar with setting-up IPv4 networks for bigger server configurations, only now I wanted to start familiarizing myself with doing the same for IPv6. I have been Googling for the second night in a row for things like: IPv6 network design, IPv6 for dummies, etc. So far most things you find go on about why IPv6 and the amazing amount of numbers that we have now. Yet I am looking for practical stuff, for example: what would be a good way to assign IP-number, as I understand it DHCP shouldn't be the default course of action. How do other assignment methods work with DNS configuration? what would be a good or standard way of dividing the network in to sub-nets? (database, application, web servers spread over multiple domains/applications and some what intertwined) In short I would like to find good resources with practical information books, webpages, etc.

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• DYNDNS setup with TightVNC on Windows Server 2008 R2

  - by StealthRT

  Hey all, i seem to be having a problem with getting ports to forward on my Windows Server 2008 R2 PC. I already set all my port forwarding for 5900/5800 on my router for my PC's IP address (192.168.1.22) but when i try to use the TightVNC PFPortChecker on port 5900 it tells me its not opened! I can not even connect to my DYNDNS server name (xxxxxxx.dyndns.org). As a side note, i am running Windows XP SP3 within a VirtaulBox inside Windows Server 2008 R2 but running the PFPortChecker in Windows 2008 R2 brings the same results as it does in the VM. I also added them to the Windows Firewall Advanced Security form to add those inbound ports for full access. What could i possibly be missing? Thanks for your time! David

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• cassandra node discovery

  - by eQuiNoX__

  I just set up a 3 node system with ip addresses "192.168.0.101", "192.168.0.102", "192.168.0.103". I have set the seeds value on the configuration of all three machines as seeds: "192.168.0.101,192.168.0.102,192.168.0.103" However, on running nodetool on any of them, only the 103 machine gets discovered. node101:/opt/cassandra/apache-cassandra-0.8.5/bin# ./nodetool ring -h 192.168.0.101 Address DC Rack Status State Load Owns Token 192.168.0.103 datacenter1 rack1 Up Normal 151.96 KB 100.00% 38174485210079977599903748344879358256 Could someone tell me where the problem lies?

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• How to gain admin privileges on D-Link router if my isp is not allowing me to do so?

  - by Fischer

  So I switched to new ISP yesterday, they gave me a D-Link router, can't use my old router. I want to change the wireless password, went to 192.168.1.1, I can login with the the username and password user user, but not as admin. On the catalog it says that the default username and password are admin admin, tried that didn't work. Tried admin and no pass, tried many combinations, none worked. I asked some other users and they said that the isp is blocking the users from logging in as admins, and blocking the reset button, and said that there's a hack where you do something like: cmd telnet "router ip" and do something like dumpcfg. Could you please give a better explanation on how to gain admin privileges on your own router if your isp is not letting you do so by default?

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• Connected 2 routers, but they won't talk

  - by ekolis

  I'm trying to set up a second WLAN at home (since the Nintendo DS firmware won't connect to my WPA-encrypted main WLAN), but when I connect my second router's WAN port to one of my main router's LAN ports, the routers won't talk, and I can't connect wirelessly to the second router. I can still see the second router's WLAN - I am just unable to connect to it. And it seems that even the main router can't see the second router, despite being plugged directly into it - I went to the main router's admin console and pinged the second router (which is receiving an IP address), but it was unable to reach it! Does anyone know what might be wrong? Thanks!

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• does heartbeat v3 support same resource agent types of pacemaker?

  - by Emre He

  As we know, Pacemaker supports three types of Resource Agents, ? LSB Resource Agents, ? OCF Resource Agents, ? legacy Heartbeat Resource Agents http://www.linux-ha.org/wiki/Resource_Agents does heartbeat v3 support above 3 types resource agent? or it only support LSB and legacy heartbeat resource agents? because we have only virtual ip and one service need to switch in ha cluster, so we decide not involve pacemaker, so we come to this question, for example we cannot monitor the application service by heartbeat, heartbeat only can handle to start it on active node. thanks, Emre

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• Mass change Microsoft DNS & IIS server settings

  - by Antonius Bloch

  I need to change about 100 DNS records and IIS configurations on a Windows 2003 web server. The gui doesn't accommodate it and the MS command line tools seem incomplete (for example: dnscmd cannot edit a record, only create). Is there a third party tool out there I can use? Basically I just need to change one IP address to another. <vent It's frustrating that what would take a simple search and replace in Linux is this massive exercise under Windows. I mean IIS 6 wasn't Microsoft's first web platform! What were they thinking??? </vent

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• Failed pinging a LAN card of the server from the client using shared internet connection

  - by bobo

  The server (Windows XP Pro SP3) has two LAN cards (LAN card A and B) and is connected to the internet using ADSL. The ADSL connection is shared to LAN card B using Internet Connection Sharing. The client (Windows XP Pro SP3) has one LAN card, and is connected to LAN card B of the server so that it has access to the internet. The IP address on the LAN cards are defined as follows: Server: LAN card A: 192.168.0.3/24 (manually defined by me) LAN card B: 192.168.0.1/24 (manually defined by Internet Connection Sharing) Client: LAN card: 192.168.0.123/24 (assigned by DHCP) Default gateway: 192.168.0.1 From the server, I can ping 192.168.0.123 successfully. From the client, it can access the internet without any problem. I can also ping 192.168.0.1 successfully but for 192.168.0.3, it failed with the Request Timeout error message. Why did the ping fail, and what should be done to make the ping possible? (all firewalls have been turned off.)

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• What is the best way to configure Apache or AWS to support a Rails multi tenancy application that allows each customer to have their own domain name?

  - by Ryan Arneson

  I'm building a Rails 3 SaaS site that allows for multi-tenancy. When a customer signs up they put in their own domain name, e.g. example.com. I need example.com to point to my SaaS application and serve them their content. My questions are as follows: Do I need to create an Apache vhost for each customer using their own domain? Is there an easier way with CNAME's to just have the customer point to the IP address of my server(s) that then forwards the request onto my application through some catch all vhost? Would I be able to create the CNAME record for the customer so they don't have to do any setup? Would this be a case better suited to Amazon Web Services? Any help or explanation or corrections on my understanding of dns would be appreciated. I'm a developer so the server ops portion of this is a bit cloudy.

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• Confusion about TCP packet analysis terms

  - by Berkay

  I'm analyzing our network and have some confusion about the terms: this is the 2-packet output from source to destination. from these i have to get some features as describe, pls make me clear... packets with at least a bytes of TCP data payload: it seems tcp.len0; The minimum segment size (confusion is headers are included or or not) The average segment size observed during the lifetime of the connection, the definition: is calculated as the value reported in the actual data bytes divided by the actual data pkts reported. Total bytes in IP packets, should be ip_len value. Total bytes in (Ethernet) The total number of bytes sent probably related to frame.len and frame.cap_len these two terms are describes as, also make me clear about these two terms. frame.cap_len: Frame length stored into the capture file frame.len: Frame length on the wire

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• System 67 error scheduled task to transfer files

  - by grom

  Running directly on command line the batch script works. But when scheduled to run (Windows 2003 R2 server) as the local administrator, I get the following error: D:\ScadaExport\exported>ping 192.168.10.78 Pinging 192.168.10.78 with 32 bytes of data: Reply from 192.168.10.78: bytes=32 time=11ms TTL=61 Reply from 192.168.10.78: bytes=32 time=15ms TTL=61 Reply from 192.168.10.78: bytes=32 time=29ms TTL=61 Reply from 192.168.10.78: bytes=32 time=10ms TTL=61 Ping statistics for 192.168.10.78: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 10ms, Maximum = 29ms, Average = 16ms D:\ScadaExport\exported>net use Z: \\192.168.10.78\bar-pccommon\scada\ System error 67 has occurred. The network name cannot be found. Any ideas? Google is turning up nothing useful, just keep finding results relating to DNS etc, but using IP address here.

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• Configure apache to reverse proxy for specific name

  - by Phrogz

  I have a working intranet server that: Properly serves some content from http://hqmktgwb01/ Is currently properly configured to reverse proxy from http://hqmktgwb01/dashstats to a round-robin of localhost:3000 - localhost:3003 Also has the DNS name dashstats (going to the same IP) The current working configuration file can be found here: http://pastie.org/1426082 I would like to modify the configuration so that:    4. http://dashstats/ performs the same reverse proxying http://hqmktgwb01/dashstats. I (naively) modified the config like this: http://pastie.org/1426047 (added lines 90-98) but this is not a valid Apache config. Please help me to modify the original config file to accomplish 1-4 above.

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• OpenVPN bandwith restrictrictions and cpu power needed

  - by user197664

  In Open VPN is there a way to set a maximum limit of data and speed per user? Say user "reptar' is abusing the VPN and I wanted to limit his/her speeds and/or data how would one go about doing this? Would I need to know the IP address of the abuser? Also, I have seen articles around the internet about turing a Rasberry PI in to a VPN server. If I did such a thing how many users would this device be able to handle at a given time? I believe it runs at 512 gb and clocks at around 700 mhz.

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• DNS server failure when forwarding

  - by Abraham Katz

  I run Bind 9 on a Ubuntu 12.04 server. I want this server to be a sort of a "wrapper" over my default server, so that it will respond to "domain_name.My_TLD" itself and forward requests to any other request. The server resides in a domain (Disconnected from the internet), so I configured it to zone "company_domain."{ type forward; forwarders { 1.2.3.4 }; #the DC's ip }; When i query it about sommething.company_domain. it sends a query to the DC and gets a response, but it returns "server failure". What can cause that? Cheers, Abraham

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• OpenDNS servers initial response is very slow

  - by Ben Collins

  I've got a Time Warner cable ISP package (RoadRunner), and the modem they gave me doesn't allow me to specify which DNS servers to use; it always uses whatever the upstream dhcp server gives it. I prefer to use OpenDNS on my home network, so i've configured a couple of my PCs manually in the Windows adapter settings for IPv4 such that their IP addresses are obtained via DHCP, but the DNS server settings are fixed to the OpenDNS server IPs. Now, when I startup Windows on these PCs, it always takes 2-3 minutes to start receiving responses from the DNS servers; any request before that times out. While not debilitating, this is quite annoying. Any ideas why this might be happening?

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• Find DNS server automatically

  - by jdickson

  I've got a Windows 2012 server set up as a domain controller and DNS server in my basement. On my laptop, if I set it to use the IP address of my server as the DNS server, then it works as expected. The problem with that is that I use my laptop outside my home network and I need to switch it back to automatic. Setup is like this: ISP Router running DD-WRT Win 2012 DC/DNS and other network computers How can I have my laptop find the DNS server automatically instead of using my ISP's DNS servers?

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• Losing WLAN connections but maintaining internet connections on WIndows 7 Workgroup

  - by Di

  I have 4 computers all running Windows 7 networked in a Work group through Billion 7404vgp-m wireless router.All drivers and firmware for wireless adapters and router are up to date. Windows Firewall and Defender disabled.Disconnected ipv6. Running Nod 32 anti virus software. All have own static IP address 192.XXX.X.XXX. When I Reset the router all computers have Internet and LAN access for about 1 hour and then they will lose the LAN connection but maintain Internet connection. Resetting wireless adapters or restarting computers does nothing to fix this but resetting router will. What is causing this and how do I fix it. Thanks Di

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• DNS error only in IE

  - by Le_Quack

  Our Intranet page has stopped working on some machines/some user accounts. The error I am getting points to a DNS issue but If I ping the site from the command line the it responds fine. The error I'm gettting on IE is Error: The web filter could not find the address for the requested site Why are you seeing this: The system is unable too determine the IP address of intranet.example.com I'm not quite sure why it mentions the web filter as there is a proxy exception for the intranet page and if I run a trace route it doesn't go via the web proxy (filtering system). Finally it isn't affecting everyone, just random users, also it doesn't affect the random users on all the client machines they use. I have one user where it happens on any client they log onto where most its just certian clients. It's even "fixed" itself for a few peoples. EDIT: hey Mikey thanks for the fast response. Proxies are correct and automatic configuration is off (both via GPO)

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• Googlebot cant access my site webmaster tools reply Unreachable robots.txt

  - by Ahmad Ahmadi

  When I try to fetch my site as a googlebot in webmaster tools it return Unreachable robots.txt, after investigate I understood google bot can see my server: tcpdump | grep google it return that google can access my server with IP 66.249.81.172 or 66.249.75.111. but there is not any think in access log or error log or other apache logs. cat access_log | grep google or cat error_log | grep 66.249.81.172 Other bot (bing,...) can access apache but google cant. there is not any problem in my robots.txt or its permissions because as you know robots.txt is not necessary so I delete it but again webmaster tools returned Unreachable robots.txt not 404 not found! information about server: Server OS : CentOS 6 Web Server : Apache 2.x Firewall : IPTables is stoped SELinux is Disabled There is not any think else for security on my server. how can I investigate the problem and is there any other command that can help me to find the problem.

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• mod_proxy security

  - by brad

  I'm on Debian Lenny using apache2. in my proxy.conf I tried adding Allow from localhost as suggested in some other forums to get proxying to work. Didn't work. It only worked if I say Allow from all My question is this. Are there any security implications to this Allow from all directive? Most people were saying to make this as limited as possible, but "all" is the client right? I want anyone regardless of their IP to be forwarded properly. Is there a better way to configure this?

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• Bridge virtual machines out WLAN interface

  - by Thomas

  It seems that my wlan card (intel 5100 AGN) firmware doesn't allow "spoofing" MAC addresses. This has the side effect of destroying the capability to bridge out my virtual machines on that interface. Apparently this is a common thing on wlan cards. I can see the incoming traffic just fine in my virtual machines, but their DHCP queries don't get bridged out of the WLAN card. It works perfectly well when using the wired ethernet port. Is there a workaround for this? MAC-NAT or something? I don't want to route my virtual machines out to the Internet because I don't want my host OS to even have an IP address. I'm using Linux and KVM for virtualization.

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• how can I effect DNS Caching on PHP/Memcache application

  - by Niro

  In a very high loaded Ubuntu/PHP web server I found that the PHP line: $memcache-connect("int-aws_ec2.memcached.myapp.net",11211); sometimes takes ~5 secs. Replacing the url with the ip address decreases the server load from ~20 to 0 My question is - where are the settings that effect the DNS caching for this? Is it in the server level or the memcache library ? How can I change it ? Additional info: Ubuntu 10.04 lucid PHP: 5.3.2-1ubuntu4.10 Apache/2.2.14 (Ubuntu) Amazon EC2 Even more info per Celada's comment: The DNS handling for the memcache server is done by scalr (the platform I use to manage the cloud resources). They have a client located on the instances and their own DNS servers. /etc/nsswitch.conf - hosts: files dns /etc/resolv.conf: nameserver 172.16.0.23 domain ec2.internal search ec2.internal The domain is not in hosts.conf To check if I run nscd I used /etc/init.d/nscd stop and received 'no such file' so i guess I dont run nscd. Thanks !

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