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  • Running multiple services on Port 443, Tunnel SSH over HTTPS

    - by lajuette
    Situation: I want to tunnel SSH sessions through HTTPS. I have a very restrictive firewall/proxy which only allows HTTP, FTP and HTTPS traffic. What works: Setting up a tunnel through the proxy to a remote linux box that has a sshd listening at port 443 The problem: I have to have a web server (lighty) running at port 443. HTTPS traffic to other ports is forbidden by the proxy. Ideas so far: Set up a virtual host and proxy all incoming requests to localhost: (e.g. 22) $HTTP["host"] == "tunnel.mylinux.box" { proxy.server = ( "" => (("host" => "127.0.0.1", "port" => 22)) ) } Unfortunately this won't work. Am i doing something wrong, or is there a reason, that this won't work?

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  • Where do SATA drives get their power when using a PCI SATA controller on oler PCs?

    - by Sukima
    I've been looking into PCI SATA controller cards online for an older PC and noticed that the ports only have the SATA cable connector and the Power supply does not have the SATA power connectors. I also had a few external eSATA drives which don't power up unless I also plugin the USB cable. Therefore I realize that SATA and eSATA do not carry power and need power else where. When converting older PCs to use a PCI SATA controller how do you provide power to the SATA drives? Anticipating the answer to be some kind of converter cable (which I was unable to search for) then can older power supplies handle added drives? (Assuming a 4 port SATA controller means 4 more drives the power supply has to endure). Or do you have to get a second poer supply and kinda jerry-rig it into an old case?

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  • Installing Windows XP sp3 into USB 2.0 WD 320Gb Hard Drive

    - by NetKabuki
    I have a HP laptop with support for 3 USB 2.0 ports. I also have a clean 320Gb WD USB 2.0 drive. The HP can boot from USB (Bios options). I used the install disk (XP SP3 bootable) and after a few stutters, was actually able to load up a partition on the 320Gb drive with Windows. I cannot consistently get the system to boot up off the USB drive. I am able to drop Ubuntu on that same WD drive and boot up. I can even get Grub2 on Ubuntu to recognize the Win OS. But booting the Win OS is an impossible task. What can I do differently - if anything?

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  • Why are they putting "processors" on hard drives?

    - by Celeritas
    What does it mean when they have a processor on the hard drive, how does it work, and what benfit does it have? I don't understand - the CPU is the processor and the hard drive transfers it's contents to RAM. Do have additional processors, preprocess the data some how? Here's some examples Western Digital WD Black WD1002FAEX 1TB "Dual processor speed" NETGEAR ReadyNAS 312 2-Bay Diskless Network Attached Storage "Dual-core Intel 2.1GHz processor and 2GB on-board memory" and routers now have processors too, why's that nescecary? I guess it sort of makes sense - some logic needs to happen for the packets to be read in to know which ports to send them out on, but why did old routers not need them? Example or wireless router with processor: "Dual-core processor"

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  • DHCP reply packets do not make it into KVM instance in OpenStack

    - by Lorin Hochstein
    I'm running a KVM instance inside of OpenStack, and it isn't getting an IP address from the DHCP server. Using tcpdump, I can see the request and reply packets on vnet0 of the compute host: # tcpdump -i vnet0 -n port 67 or port 68 tcpdump: WARNING: vnet0: no IPv4 address assigned tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on vnet0, link-type EN10MB (Ethernet), capture size 65535 bytes 19:44:56.176727 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from fa:16:3e:46:f6:11, length 300 19:44:56.176785 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from fa:16:3e:46:f6:11, length 300 19:44:56.177315 IP 10.40.0.1.67 > 10.40.0.3.68: BOOTP/DHCP, Reply, length 319 19:45:02.179834 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from fa:16:3e:46:f6:11, length 300 19:45:02.179904 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from fa:16:3e:46:f6:11, length 300 19:45:02.180375 IP 10.40.0.1.67 > 10.40.0.3.68: BOOTP/DHCP, Reply, length 319 However, if I do the same thing on eth0 inside the KVM instance, I only see the request packets, not the reply packets. What would prevent the packets from making it from vnet0 of the host to eth0 of the guest? My host is running Ubuntu 12.04 and my guest is running CentOS 6.3. Note that I have added this rule in my iptables, but it doesn't resolve the issue: -A POSTROUTING -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill The instance corresponds to vnet0 and is connected via br100: # brctl show bridge name bridge id STP enabled interfaces br100 8000.54781a8605f2 no eth1 vnet0 vnet1 virbr0 8000.000000000000 yes Here's the full iptables-save: # Generated by iptables-save v1.4.12 on Tue Apr 2 19:47:27 2013 *nat :PREROUTING ACCEPT [8323:2553683] :INPUT ACCEPT [7993:2494942] :OUTPUT ACCEPT [6158:461050] :POSTROUTING ACCEPT [6455:511595] :nova-compute-OUTPUT - [0:0] :nova-compute-POSTROUTING - [0:0] :nova-compute-PREROUTING - [0:0] :nova-compute-float-snat - [0:0] :nova-compute-snat - [0:0] :nova-postrouting-bottom - [0:0] -A PREROUTING -j nova-compute-PREROUTING -A OUTPUT -j nova-compute-OUTPUT -A POSTROUTING -j nova-compute-POSTROUTING -A POSTROUTING -j nova-postrouting-bottom -A POSTROUTING -s 192.168.122.0/24 ! -d 192.168.122.0/24 -p tcp -j MASQUERADE --to-ports 1024-65535 -A POSTROUTING -s 192.168.122.0/24 ! -d 192.168.122.0/24 -p udp -j MASQUERADE --to-ports 1024-65535 -A POSTROUTING -s 192.168.122.0/24 ! -d 192.168.122.0/24 -j MASQUERADE -A nova-compute-snat -j nova-compute-float-snat -A nova-postrouting-bottom -j nova-compute-snat COMMIT # Completed on Tue Apr 2 19:47:27 2013 # Generated by iptables-save v1.4.12 on Tue Apr 2 19:47:27 2013 *mangle :PREROUTING ACCEPT [7969:5385812] :INPUT ACCEPT [7905:5363718] :FORWARD ACCEPT [158:48190] :OUTPUT ACCEPT [6877:8647975] :POSTROUTING ACCEPT [7035:8696165] -A POSTROUTING -o virbr0 -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill -A POSTROUTING -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill COMMIT # Completed on Tue Apr 2 19:47:27 2013 # Generated by iptables-save v1.4.12 on Tue Apr 2 19:47:27 2013 *filter :INPUT ACCEPT [2196774:15856921923] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [2447201:1170227646] :nova-compute-FORWARD - [0:0] :nova-compute-INPUT - [0:0] :nova-compute-OUTPUT - [0:0] :nova-compute-inst-19 - [0:0] :nova-compute-inst-20 - [0:0] :nova-compute-local - [0:0] :nova-compute-provider - [0:0] :nova-compute-sg-fallback - [0:0] :nova-filter-top - [0:0] -A INPUT -j nova-compute-INPUT -A INPUT -i virbr0 -p udp -m udp --dport 53 -j ACCEPT -A INPUT -i virbr0 -p tcp -m tcp --dport 53 -j ACCEPT -A INPUT -i virbr0 -p udp -m udp --dport 67 -j ACCEPT -A INPUT -i virbr0 -p tcp -m tcp --dport 67 -j ACCEPT -A FORWARD -j nova-filter-top -A FORWARD -j nova-compute-FORWARD -A FORWARD -d 192.168.122.0/24 -o virbr0 -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -s 192.168.122.0/24 -i virbr0 -j ACCEPT -A FORWARD -i virbr0 -o virbr0 -j ACCEPT -A FORWARD -o virbr0 -j REJECT --reject-with icmp-port-unreachable -A FORWARD -i virbr0 -j REJECT --reject-with icmp-port-unreachable -A OUTPUT -j nova-filter-top -A OUTPUT -j nova-compute-OUTPUT -A nova-compute-FORWARD -i br100 -j ACCEPT -A nova-compute-FORWARD -o br100 -j ACCEPT -A nova-compute-inst-19 -m state --state INVALID -j DROP -A nova-compute-inst-19 -m state --state RELATED,ESTABLISHED -j ACCEPT -A nova-compute-inst-19 -j nova-compute-provider -A nova-compute-inst-19 -s 10.40.0.1/32 -p udp -m udp --sport 67 --dport 68 -j ACCEPT -A nova-compute-inst-19 -s 10.40.0.0/16 -j ACCEPT -A nova-compute-inst-19 -p tcp -m tcp --dport 22 -j ACCEPT -A nova-compute-inst-19 -p icmp -j ACCEPT -A nova-compute-inst-19 -j nova-compute-sg-fallback -A nova-compute-inst-20 -m state --state INVALID -j DROP -A nova-compute-inst-20 -m state --state RELATED,ESTABLISHED -j ACCEPT -A nova-compute-inst-20 -j nova-compute-provider -A nova-compute-inst-20 -s 10.40.0.1/32 -p udp -m udp --sport 67 --dport 68 -j ACCEPT -A nova-compute-inst-20 -s 10.40.0.0/16 -j ACCEPT -A nova-compute-inst-20 -p tcp -m tcp --dport 22 -j ACCEPT -A nova-compute-inst-20 -p icmp -j ACCEPT -A nova-compute-inst-20 -j nova-compute-sg-fallback -A nova-compute-local -d 10.40.0.3/32 -j nova-compute-inst-19 -A nova-compute-local -d 10.40.0.4/32 -j nova-compute-inst-20 -A nova-compute-sg-fallback -j DROP -A nova-filter-top -j nova-compute-local COMMIT # Completed on Tue Apr 2 19:47:27 2013

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  • How to setup separate MySQL and PHP VPS servers

    - by Fazal
    Someone recommended I should have my MySQL server separate from my Apache/PHP server in case of hacking and such. By visiting linode, slicehost and various articles here on serverfault I've managed to cobble together a decent set of instructions on how to do the Apache/PHP bit. I'm using Rackspace VPS and they provide an internal IP for each server. If I setup a MySQL VPS, should I assume that I would just add the internal IP for the database host? And I guess that I would only need to open up my default ssh port and mysql ports and install phpmyadmin on there? Ideally I would have webserver.mydomain.com and dbserver.mydomain.com (two 256mb VPS's) with servermin on webserver.mydomain.com and phpmyadmin on dbserver.mydomain.com. If anyone has any guides or advice on how to setup this type of solution I'd be more then grateful!

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  • FTP timeout only the first time

    - by user1474681
    I'm using PureFTPd on MacOSX (Snow Leopard, not server version). When trying to access the FTP account from the outside via dyndns (e.g. using https://www.wormly.com/test_ftp_server) the connection always times out the FIRST time. When I try AGAIN in the next few seconds it works. What is this about? I have forwarded the ports to my apple router and tried disabling the OSX firewall as well. Thanks for any advice. Dennis

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  • What version of SCO Open Server are guys using out there and on what hardware?

    - by Gath
    I have some old applications which are running on SCO Open Server 5.0.5, and i would love to move them to SCO Open Server 5.0.7 and on modern hardware(servers), currently am running SCO on old IBM PL 300 personal computer, on 92MB Memory, one processor, and it has been serving the clients pretty well. Now i have New Modern IBM xseries Servers and i would love to migrate the same applications to those new servers. Problem is, SCO 5.0.5 is unable to detect some of the hardware components in the new servers. I read somewhere that SCO 5.0.7 is able to detect the newer hardware even the USB ports etc. Is there anyone running SCO Openserver out there, and on what hardware architecture are they running on? Gath

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  • how to connect only ethernet and only wireless hosts together

    - by Ashok Das
    Here is my problem. I have an android tablet that have only WiFi for network connectivity and I have a windows server that have only Ethernet ports for network connection. Now I want to telnet to my server from my tablet. I think some wireless to Ethernet converter required in between. I am planning to use Buffalo Air Station WCR-GN or TP-LINK TL-WR740N or TL-WR702N. The connection setup should be like this: [server]<---Ethernet---[WIFI router]<---wireless---[Tablet]. Now I am in doubt will this setup work? Anybody please help me with this. Regards Ashok

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  • How do I receive email sent to postmaster?

    - by jonescb
    I have a VPS server that I would like to get an SSL certificate for, and the CA needs an email address to verify that I own the domain. The options are: [email protected], [email protected], [email protected], and an address to @whoisguard.com. The server runs CentOS 5, and all I have set up for email is sendmail. I don't have POP3 or IMAP. According to this Wikipedia article on Postmaster, it says that all SMTP servers support postmaster and it cites RFC 5321. Does sendmail conform to this? I tried sending a test mail to [email protected], but I don't know how to receive it on my server. Do I need to open up any ports? I haven't gotten a message back saying that my test mail failed to send, so my server must have gotten it.

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  • `which python` points to the python I want, but `python` runs the wrong version

    - by tramdas
    I want to use python24 provided by ports, so I've installed it, and python_select -s shows that the version I want is indeed selected. Running which python gives /opt/local/bin/python, and running /opt/local/bin/python gives me the version I want. However when I run python from the shell, I get the /usr/bin/python version instead. I don't have a python alias. Here's the situation in a nutshell: I believe the path is set up sensibly, and which python seems to confirm this. alias only returns 1 entry, which is something unrelated to this. Nevertheless, running python from the bash shell gives me the wrong python! I'm kind of stumped! What am I overlooking?

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  • Bring internet connection to ssh target machine via tunnel?

    - by Calvin
    I have a CentOS 5 machine deep inside firewalls that's only reachable via ssh on an unconventional port, let's say 98765. I normally connect to this machine like this: ssh -P 98765 user@ip -L5900:localhost:5900 I need to run yum to install some packages on this machine, but it's not possible since the outbound ports are all closed on this machine. I want to do something like this to "bring my internet connection" to this machine: ssh -P 98765 user@ip -L5900:localhost:5900 -R80:localhost:80 -R21:localhost:21 My intention is that, when I run yum on the machine, yum will use port 80 and 21 through my originating machine. Is something like this even possible?

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  • Syn_Recievd on port 80 , IIS 7.5

    - by Ashian
    Hi I have a trouble on my windows 2008 server. I host several web site on it. From some days ago, my web sites stop responding on port 80 after a while. In this time I can't access web sites from local machine and from remote. I can also browse websites on other ports ( custom port that I set) I find that I have many Syn_Received status on netstat. And when web sites stop, I got only syn_received on port 80. I have to restart server because when I try to restart IIS , it takes a long time to stop W3SVC and many times it doesn’t stop at all. Would anyone please tell me : - How can I manage Syn Attack ? Thanks

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  • esxi VM will not connect to virual switch

    - by NitroxDM
    I have a exsi box with a VM (Windows 2003) that will not connect to any of the switches. The switch shows the VM connected but I can not ping anything on the network. I have double checked the VM's IP. No dice. There are a ton of messages in the log: [DATE 'VmMisc' NNNNN warning] Failed to validate VM IP address: unknown Update: There are 3 other VMs. Each vSwitch has 56 ports. I can ping from one nic to the other. Each vSwitch shows that the new VM is connect. VMware ESX Server 3i V 3.5.9 Build 123629 Update 2: Out of the blue it just started working. I didn't change anything. I think it has something to do with RRAS.

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  • MS Server 2008 R2: DNS Redirection on second server for website

    - by Alain
    We have a website on a secondary server that we want this website to be accessible from Internet, with www.mywebsite.com. In the domain name provider of www.mywebsite.com, we set our 2 dns names, dns1.company.ch, dns2.company.ch and our static ip address. System is set as following: MS Server 2008 R2 N°1: Main server, in AD With IP 192.168.1.100 With DNS zone dns1.company.ch With DNS secondary zone from server N°2: dns2.company.ch With DNS secondary zone from server N°2: mywebsite.com (zone transfer is on) MS Server 2008 R2 N°2: Secondary server, not in AD With IP 192.168.1.101 With DNS zone dns2.company.ch With DNS zone mywebsite.com with host: 192.168.1.101 With the website under ISS with bindings www.mywebsite.com:80, mywebsite.com:80 All traffics for ports 80 (http) and 53 (dns) from Internet goes to server N°1. How can we redirect all traffics for www.mywebsite.com from Internet to our secondary server so the corresponding website can be displayed in Internet ? Note: Under DNS of server N°1, we tried to use also a conditional redirector mywebsite.com (192.168.0.101), but it was working only for intranet. Thank you, Alain

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  • How can I switch between the HDMI and DVI outputs of my graphics card?

    - by Owen Melbourne
    I've got an Nvidia GTX 560ti card which currently I've got my 2 monitors hooked up to using the 2 DVI ports. However its got a mini-HDMI port which I've plugged a HDMI cable in (with mini adapter) and lead it into my TV which is across the room. I'm hoping to be able to toggle between the HDMI output and the DVI outputs, however I'm not sure how I'd go about this, Could somebody please point me in the right direction, I'm not really worried about having all 3 on at the same time so that isn't a problem, but if its possible then I'll do that.

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  • Sharing my broadband connection over a router

    - by user1004985
    I have a broadband connection which I can connect to my laptop's ethernet port. If I want to use the same connection on another machine I would have to do it via a router (I dont want to use ICS since it requires both machines to be ON). I have a router but its uplink is a 4p4c pin rather that an 8p8c(RJ45) so my broadband cable wont fit into it. The router I have is ZTE ZXDSL 531B. And the broadband connection I am talking about has an antenna on the rooftop from which an ethernet cable (CAT 5) runs to my PC's LAN port. Is there some way of utilising the LAN ports of the router to achieve what I mentioned above. Please Help

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  • Securing a Windows Server 2008 R2 Public Web Server

    - by Denny Ferrassoli
    I'm setting up a public web server: Windows Server 2008 R2, IIS7.5. Does anyone have a tutorial / walkthrough / tips on properly securing a public web server? I've seen a few tutorials but mostly focused on Windows Server 2003. What I've done so far: Created a specific user account for the website / app pool, Renamed Admin account, Installed FTPS, Configured firewall to block any non-public service (web / https), Configured firewall to allow access to management interfaces only from specific IP addresses (rdp, IIS management, ftp) Maybe a few other things but can't remember at the moment... ICMP is allowed... Should I disable all except ping? Port scan reveals only web and https ports. Any other suggestions? Thanks

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  • postfix specify limited relay domain while allowing sasl-auth relay

    - by tylerl
    I'm trying to set up postfix to allow relaying under a limited set of conditions: The destination domain is one of a pre-defined list -or- The client successfully logs in Here's the relevant bits o' config: smtpd_sasl_auth_enable=yes relay_domains=example.com smtpd_recipient_restrictions=permit_auth_destination,reject_unauth_destination smtpd_client_restrictions=permit_sasl_authenticated,reject The problem is that it requires that BOTH restrictions be satisfied, rather than either-or. Which is to say, it only allows relaying if the client is authenticated AND the recipient domain is @example.com. Instead, I need it to allow relaying if either one of the requirements is satisfied. How do I do this without resorting to running SMTP on two separate ports with different rules? Note: The context is an outbound-use-only (bound to 127.0.0.1) MTA on a shared web server which all site owners are allowed to relay mail to one of the "owned" domains (not server-local, though), and for which a limited set of "trusted" site owners are allowed to relay mail without restriction provided they have a valid SMTP login.

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  • FreeBSD 8.2 + Apache 2.2 + mod_auth_pam2: unable to authenticate

    - by zneak
    I've installed Apache 2.2 and mod_auth_pam2 from ports, but I can't get local UNIX authentication to work. When I access the protected part of my local website, I do get the authentication request, and with pam_permit.so, it works. However, when I change pam_permit.so to the real thing, pam_unix.so, I get this message in httpd-error.log: [error] PAM: user 'foo' - not authenticated: authentication error This is the relevant part of my Apache config, though I don't think it's the problem as it works with pam_permit.so: <Location /foo> AuthBasicAuthoritative Off AuthPAM_Enabled on AuthPAM_FallThrough off AuthType Basic AuthName "Secret place" Require valid-user </Location> This is my /etc/pam.d/httpd, though I don't think it's the problem either, since it works with pam_permit.so: auth required pam_unix.so account required pam_unix.so So what am I missing? What does it take to have pam_unix.so work for httpd under FreeBSD?

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  • How to DNAT to different local IP based on what public IP was accessed with Shorewall?

    - by mikl
    My server has several public IPs, and is running a bunch of virtual machines with private IP adresses. As an example, I want to map ports 80, 443 and 8080 on 232.21.23.23 (public) to 192.168.122.12 (private). I have tried a couple of different NAT mappings, but none of them seem to work: # This doesn't work. DNAT net loc:192.168.122.12 tcp 80,443,8080 - 232.21.23.23 # Neither does this. DNAT $FW loc:192.168.122.12 tcp 80,443,8080 - 232.21.23.23 # Nor this. DNAT net:232.21.23.23 loc:192.168.122.12 tcp 80,443,8080 # I have no idea what I'm doing. DNAT $FW:232.21.23.23 loc:192.168.122.12 tcp 80,443,8080 Can anyone point me in the right direction?

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  • Connect iPad to windows 7 VPN

    - by Linuz
    My iPad keeps spitting out the error: "A connection could not be established to the PPP server." I am trying to connect it to a VPN I set up with Windows 7 as an incoming connection. On the iPad, I went into the VPN settings, added a new PPTP VPN with the following information Server: Windows 7 Computer's IP RSA SecurID: OFF Account: Account Username Password: Account Password Encryption Level: Auto Send All Traffic: ON Proxy: Off Now I know that it is making some connection to the Windows 7 Computer because whenever I intentionally put in the wrong VPN password on the iPad, it makes me put in the correct one before trying to connect again. All the ports are forwarded on my router for PPTP, and my Windows 7 Firewall is even off to try to get this to work. Any help would be greatly appreciated, thanks.

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  • Port binding conflicts with "switch user" on Windows 7

    - by C-dizzle
    We are using the switch user function within Windows 7 under an active directory network. We have one application in particular that gives us an error: Only one usage of each socket address (protocol/network address/port) is normally permitted. bind Port 10001 Are there any other ports that can only be used at one time that might have an adverse effect on the other user? We try to mentor our users to use the log off function instead of switch user, but that doesn't always happen. As an alternative, is it possible to disable the 'switch user' button on our machines?

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  • Is it common to have portable hard drive not recognize?

    - by lamwaiman1988
    I have a bad hard drive which could not be recognized by windows. If windows can recognize it, it could just be pure luck. There are better chance of it being recognize by plugging it at the usb back of the machine, rather than the front one. More interestingly, I have a usb cable which fork itself at one side ( i.e it has 2 heads at one side ). I can plug both heads to the machine and connect the portable hard drive on the other end of the usb cable? Can I get more voltage by doing this? I am guessing the front usb port doesn't have enough power. I am wondering if I buy a new portable usb hard drive, would it have easy read by plugging at the front usb port? I am not sure if I screw up the jumper connecting the front usb ports, but it is okay for other device such as usb stick and mouse.

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  • VPN authentication and MAC addresses

    - by zakk
    I have to set up a VPN (various clients connecting to a web service on a server, which is also the VPN server) and I want to make sure that no user will share his/her credentials with third parties. I know that this problem is not solvable completely, but I'd want to set up some additional security checks... Some idea I have: 1) An additional check on MAC address, but... are MAC addresses preserved thru VPN? 2) Some kind of extra identification of the client (User Agent, open ports, I want to make sure that is the very same client I authorized). 3) I would like to avoid commercial solutions like a security token... I realize it would be the perfect solution, but it will be to expensive, I suppose... Do you feel that these options are viable? Do you have any other ideas? Thanks in advance for your replies!

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