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• ATI Radeon 5850 I cant seem to get 3 monitors up at the same time. 2 Monitors and a HDTV but still.

  - by Jan

  Ive just bought the top end ATI Radeon card with 2 normal monitor ports and a HDMI. The idea was to continue using my dual screen setup as always and to use the last plug, the HDMI on my TV. I got a new 52 inch HD TV with all the necessary bits. This should work fine. But.. in Display Properties I still get only my 2 monitors up as options. Not the Digital TV. When I unplug 1 monitor and restart the computer, I get the TV and the other monitor. But never all 3 at the same time. Why is this ? Where can I go to tell it that I need all 3 screens at the same time. Also I get a message saying my gfx card also gives sound through the HDMI cable.. But the TV tells me its recieving a sound format that it does not understand. Any ideas on that too while were at it ?

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• Windows Server 2003 not automatically assigning drive letter to external drives

  - by Chris

  My newly rebuilt Windows Server 2003 doesn't automatically assign drive letters to external usb devices. I have to manually open the Disk Management Console and assign it a drive letter every time. It does this with two different drives in all USB ports. I have been doing some reading and I don't have any network drives, I have also already tried USBDLM and it doesn't seem to have made any difference. Specs: ProLiant ML150 G5 with Windows 2003 Enterprise and all updates installed. Any ideas on what I can try to resolve this problem would be greatly appreciated. Chris

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• Plesk 10 port 8443 connection timeout

  - by GriffinHeart

  I've installed plesk 10 on centOS and after installing to access the cp you need to go https::8443 I'm not being able to, and would like to find out why i can ssh to the server and i can, from the server telnet, to those ports. from another machine i can ping it but when i try to telnet or go to that address i get connection timeout, happens with port 80 and 8443 from my netstat netstat -nlp | grep 8443 tcp 0 0 :::8443 :::* LISTEN 25205/sw-cp-serverd How do i find out whats causing the problem? I also have a router but firewall is at the minimum and the server configured as DMZ, also tried to redirect 8443 to 8443 of the server.

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• How long do managed gigabit ethernet switches take to boot up?

  - by Warren P

  One critical drawback that I have found in researching managed-switches, and one that I have some past experience with is that anything with "lots" of firmware is going to have lots of issues associated with that firmware. We are in the middle of researching rackmount gigabit switches (48 port). It looks like for 48 ports, our only choice is managed switches (Dell, Cisco/Linksys,HP, etc). What I want to know, that I can not find out much about is the boot-time for various managed switches. If you own one, can you please answer with the model number, and the cold boot time in seconds. I have read online that Linksys (now Cisco) SRW series sometimes take almost 5 minutes before they are fully booted up, and that is an unacceptable cost for us. I particularly want to know about Dell PowerConnect managed switch bootup time (model 3548 and 5448), and would like to confirm the 5-minute boot time on the SRW2048 or similar model, and any HP ProCurve boot up times. The composite of all those figures ought to form an interesting overall performance picture.

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• How do I fix Nginx config to work with multiple hosts of Unicorn?

  - by fred deAlmeida

  I have no problem instantiating multiple instances of unicorn on different unix sockets and ports. Works fine if I do url:port. My problem comes in correctly formatting nginx.conf to allow multipe upstream conditions. Whatever i do does not seem to work. One instance is fine works fine. Multiple gives me a ""upstream" directive is not allowed here error I am using the base nginx sample from the unicorn site. and doubling up the upstream area with differing terms. each is part of the http set. Any help would be amazing!

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• Plesk 10 port 8443 connection timeout

  - by GriffinHeart

  I've installed plesk 10 on centOS and after installing to access the cp you need to go https::8443 I'm not being able to, and would like to find out why i can ssh to the server and i can, from the server telnet, to those ports. from another machine i can ping it but when i try to telnet or go to that address i get connection timeout, happens with port 80 and 8443 from my netstat netstat -nlp | grep 8443 tcp 0 0 :::8443 :::* LISTEN 25205/sw-cp-serverd How do i find out whats causing the problem? I also have a router but firewall is at the minimum and the server configured as DMZ, also tried to redirect 8443 to 8443 of the server.

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• Self-hosted browser-based remote desktop script?

  - by rlsaj

  I need a self-hosted browser based remote desktop script that will connect me from any PC to my work PC. I need to either host this script within my own dedicated hosting or on my work PC. The PC that I need to remote into is always the one PC (Win7) and the IP never changes, and I have access to the Router/Firewall within. I have tried many remote desktop services and applications - LogMeIn, Team Viewer, (Ultra/Tight) VNC, GoToMyPC and iTeleport Connect and even Windows Remote Desktop - and the web services (or ports) are blocked at whatever free wi-fi/hotel/coffee shop I am at. Note that I will need to be able to access this from any PC, so I won't be able to install any applications (or use any portable software) - hence my thinking that it will need to be browser based on a standard (not blocked) port. If I can set up a web based remote desktop application - really a homebrew LogMeIn - then I should solve my problem. What is the best option here?

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• Router 2wire, Slackware desktop in DMZ mode, iptables policy aginst ping, but still pingable

  - by skriatok

  I'm in DMZ mode, so I'm firewalling myself, stealthy all ok, but I get faulty test results from Shields Up that there are pings. Yesterday I couldn't make a connection to game servers work, because ping block was enabled (on the router). I disabled it, but this persists even due to my firewall. What is the connection between me and my router in DMZ mode (for my machine, there is bunch of others too behind router firewall)? When it allows router affecting if I'm pingable or not and if router has setting not blocking ping, rules in my iptables for this scenario do not work. Please ignore commented rules, I do uncomment them as I want. These two should do the job right? iptables -A INPUT -p icmp --icmp-type echo-request -j DROP echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all Here are my iptables: #!/bin/sh # Begin /bin/firewall-start # Insert connection-tracking modules (not needed if built into the kernel). #modprobe ip_tables #modprobe iptable_filter #modprobe ip_conntrack #modprobe ip_conntrack_ftp #modprobe ipt_state #modprobe ipt_LOG # allow local-only connections iptables -A INPUT -i lo -j ACCEPT # free output on any interface to any ip for any service # (equal to -P ACCEPT) iptables -A OUTPUT -j ACCEPT # permit answers on already established connections # and permit new connections related to established ones (eg active-ftp) iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT #Gamespy&NWN #iptables -A INPUT -p tcp -m tcp -m multiport --ports 5120:5129 -j ACCEPT #iptables -A INPUT -p tcp -m tcp --dport 6667 --tcp-flags SYN,RST,ACK SYN -j ACCEPT #iptables -A INPUT -p tcp -m tcp --dport 28910 --tcp-flags SYN,RST,ACK SYN -j ACCEPT #iptables -A INPUT -p tcp -m tcp --dport 29900 --tcp-flags SYN,RST,ACK SYN -j ACCEPT #iptables -A INPUT -p tcp -m tcp --dport 29901 --tcp-flags SYN,RST,ACK SYN -j ACCEPT #iptables -A INPUT -p tcp -m tcp --dport 29920 --tcp-flags SYN,RST,ACK SYN -j ACCEPT #iptables -A INPUT -p udp -m udp -m multiport --ports 5120:5129 -j ACCEPT #iptables -A INPUT -p udp -m udp --dport 6500 -j ACCEPT #iptables -A INPUT -p udp -m udp --dport 27900 -j ACCEPT #iptables -A INPUT -p udp -m udp --dport 27901 -j ACCEPT #iptables -A INPUT -p udp -m udp --dport 29910 -j ACCEPT # Log everything else: What's Windows' latest exploitable vulnerability? iptables -A INPUT -j LOG --log-prefix "FIREWALL:INPUT" # set a sane policy: everything not accepted > /dev/null iptables -P INPUT DROP iptables -P FORWARD DROP iptables -P OUTPUT DROP iptables -A INPUT -p icmp --icmp-type echo-request -j DROP # be verbose on dynamic ip-addresses (not needed in case of static IP) echo 2 > /proc/sys/net/ipv4/ip_dynaddr # disable ExplicitCongestionNotification - too many routers are still # ignorant echo 0 > /proc/sys/net/ipv4/tcp_ecn #ping death echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all # If you are frequently accessing ftp-servers or enjoy chatting you might # notice certain delays because some implementations of these daemons have # the feature of querying an identd on your box for your username for # logging. Although there's really no harm in this, having an identd # running is not recommended because some implementations are known to be # vulnerable. # To avoid these delays you could reject the requests with a 'tcp-reset': #iptables -A INPUT -p tcp --dport 113 -j REJECT --reject-with tcp-reset #iptables -A OUTPUT -p tcp --sport 113 -m state --state RELATED -j ACCEPT # To log and drop invalid packets, mostly harmless packets that came in # after netfilter's timeout, sometimes scans: #iptables -I INPUT 1 -p tcp -m state --state INVALID -j LOG --log-prefix \ "FIREWALL:INVALID" #iptables -I INPUT 2 -p tcp -m state --state INVALID -j DROP # End /bin/firewall-start Active ruleset: bash-4.1# iptables -L -n -v Chain INPUT (policy DROP 38 packets, 2228 bytes) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 844 542K ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 38 2228 LOG all -- * * 0.0.0.0/0 0.0.0.0/0 LOG flags 0 level 4 prefix `FIREWALL:INPUT' 0 0 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 38 2228 LOG all -- * * 0.0.0.0/0 0.0.0.0/0 LOG flags 0 level 4 prefix `FIREWALL:INPUT' Chain FORWARD (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 1158 111K ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 Active ruleset: (after editing iptables into below sugested form) bash-4.1# iptables -L -n -v Chain INPUT (policy DROP 2567 packets, 172K bytes) pkts bytes target prot opt in out source destination 49 4157 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 412K 441M ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 2567 172K LOG all -- * * 0.0.0.0/0 0.0.0.0/0 LOG flags 0 level 4 prefix `FIREWALL:INPUT' 0 0 DROP icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 8 Chain FORWARD (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 312K packets, 25M bytes) pkts bytes target prot opt in out source destination ping and syslog simultaneous screenshots from phone (pinger) and from laptop (being pinged) http://dl.dropbox.com/u/4160051/slckwr/pingfrom%20mobile.jpg http://dl.dropbox.com/u/4160051/slckwr/tailsyslog.jpg

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• How can I use 2 monitors plus laptop with my Dell e6420 w/ Nvidia nvs 4200m

  - by KallDrexx

  I have just hooked up a 2nd external monitor to my Dell e6420 laptop with a Nvidia NVS 4200m graphics card, running Windows 8 64 bit. However, the computer won't let me have both monitors and the laptop display active at the same time. I installed the latest Nvidia graphics drivers (310.70) but it claims that my GPU can only support up to 2 monitors. Nivdia's website implies differently (as does various other laptops around the office). The monitors are connected both via DVI to my dell docking station that has multiple DVI ports. Both monitors are working correctly, I just can't get all 3 working together. Attempting to download the driver from dell fails, as their driver installer is broken apparently Any ideas?

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• Restrict a port to a single app

  - by viraptor

  I'd like to restrict a range of udp ports to a single application (or a user). What I'd like to achieve is not simply blocking a bind() from other uids, but also remove the range from a pool that can be auto-assigned. For example, if someone tries to explicitly bind 12345, but doesn't run the specified app, they should get EPERM. If someone tries to bind an unspecified port, they should never try to bind 12345 at random. Is there any system that can help here? I tried browsing apparmor / selinux docs, but they seem to do the blocking part only.

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• Error while trying to configure VLAN with Open vSwitch

  - by Abhishek Chanda

  I am trying to connect a number of VMs using Open vSwitch. The VMs are on two separate physical boxes. Here is what I did: Created two tap devices on one physical host sudo ip tuntap add mode tap tap0 and same for tap1 Bring them up sudo ip link set tap0 up Add them as ports to Open vSwitch (br0 was created as a OVS bridge previously) sudo ovs-vsctl add-port br0 tap0 tag=1 Now I booted the VMs (using VirtualBox) and assigned addresses 192.168.122.11 and 192.168.122.12. Now when I try to ping one VM from another, I get the error Connect: network is unreachable. Since both VMs are connected to the switch on the same VLAN, I expect to be able to ping one from another. What is going wrong here?

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• MRTG: Switch Port Throughput

  - by amazinghorse24

  I currently have MRTG running in a Debian box. It currently polls a Netgear Switch for the speeds of 7 or so ports and then makes the graphs of them. It currently only records the bits/sec. I would like to set up MRTG to record and display the total amount of data that has gone through the port, not just the speed of it. I am somewhat new to MIBS and SNMP and so I need some help. The switch is a Netgear GS748AT and am not quite sure where to find the MIBS for it, or which MIBS I need to accomplish my task. Any and all help is appreciated!

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• Slow LAN transfer from 3rd party computer

  - by Chris

  Hi Everyone, I've got an odd problem that I'm not really sure where to start the troubleshooting process. I have a 'server' with Windows Server 2008R2 (64-bit) installed and it has a couple of hard drives. If I Remote Desktop into the server and transfer files from one HD to the other, all it fine. If however, I use my workstation (Windows 7 64bit) and open up a shared resource on the server and transfer a file from one hard drive on the server to another HD on the server (not using Remote Desktop, just Windows explorer/Network places), the transfer crawls... It takes about 5mins to discover files/calculate the transfer and then starts transferring at speeds like 56KB/s - 200KB/s. Both machines have Marvel GigE network ports with a TrendNet 8-port green GigE switch. I've set Jumbo packets to 9K on both machines...

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• How do I configure Shrewsoft's VPN client to only route traffic to a certain IP address through the VPN?

  - by dommer

  We're using Shrewsoft's VPN client to connect to a third party development server. However, it seems to be configured to send all or nothing through the VPN. The devs have to disconnect from the VPN to get email/internet access back. The server that needs to be accessed via the VPN is on a specific (local - 10.x.x.x) IP address and a specific ports. Can we configure the Shrewsoft client application to only route traffic to that one address and/or port through the VPN and to route anything else though the usual channels? If so, how is it done? I'm not a VPN specialist and the options are confusing. In the absence of any Shewsoft VPN client specific advice, what should I be search for? Split tunnels?

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• Motherboard warning lights when plugging in a display port cord to graphics card?

  - by rllr

  Earlier today, my computer spontaneously shut itself off and refused to turn back on. I tested my PSU and it's operating fine. I unplugged everything and let it sit for a while and it started to make a high pitched coil whine/hiss. When I came back an hour later and plugged in only the power cord, it turned on without any issues. After some troubleshooting, I noticed my motherboard (Intel D975XBX2) has a red CPU led and VR led that come on whenever I plug my monitor into my graphics card via display port. DVI does not cause a similar issue. I was running three monitors off the card, so I need both DVI ports and the display port working. Is it likely my graphics card needs to be replaced, or should I be looking elsewhere to resolve this issue?

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• SSH connection falling down

  - by kappa

  I've set up a connection with autossh that creates some tunnels at system startup, but if I try to connect, after successful login (with RSA key) connection fall down, here a trace: debug1: Authentication succeeded (publickey). debug1: Remote connections from LOCALHOST:5006 forwarded to local address localhost:22 debug1: Remote connections from LOCALHOST:6006 forwarded to local address localhost:80 debug1: channel 0: new [client-session] debug1: Requesting [email protected] debug1: Entering interactive session. debug1: remote forward success for: listen 5006, connect localhost:22 debug1: remote forward success for: listen 6006, connect localhost:80 debug1: All remote forwarding requests processed debug1: Sending environment. debug1: Sending env LANG = it_IT.UTF-8 debug1: Sending env LC_CTYPE = en_US.UTF-8 debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug1: client_input_channel_req: channel 0 rtype [email protected] reply 0 debug1: channel 0: free: client-session, nchannels 1 Transferred: sent 2400, received 2312 bytes, in 1.3 seconds Bytes per second: sent 1904.2, received 1834.4 debug1: Exit status 1 What can be the problem? All this stuff is managed by a script already running on another machine (creating reverse tunnels on the same machine but with different ports)

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• Recommending simple appliance for DansGuardian, iptables, snort inline

  - by SRobertJames

  I'm currently using a Linksys E2000 with dd-wrt. I'd like to add DansGuardian for Content Filtering and snort-inline for IPS; but those require a more powerful box (mainly, more storage). Can you recommend a good device to use? I'm open to both overwrite-the-firmware (like dd-wrt) and designed-to-be-customized boxes. Requirements: 1. 5+ Ethernet ports, pref. GigE 2. small form factor 3. No noise (office environment) 4. low power 5. Not sure about 802.11 wireless Budget < $400, pref. less.

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• Can't bring NAT to work

  - by user31738

  Hello, I bought a D-link DIR-300 wireless router and i can't bring NAT to work, i have an ssh and http service i need to forward to the internet. My connection is as follows: I have an ADSL connection, i'm using a ADSL ethernet modem connected and working, it doesnt let me put it on bridge mode. I have my router connected to my adsl modem through ethernet, it gets its ip through DHCP (and i'ts always the same) I have a desktop computer running linux with apache and openssh configured and working, it has fixed ip. I configured the NAT in the modem forwarding port 22 from the router ip to the internet. In the router i setup NAT forwarding port 22 from the desktop computer fixed ip to out there. This setup already worked with a fonera i had before, can anyone help me with this or tell me what kind of tests do i need to do? How can i test if the router is forwarding ports correctly before the modem?

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• Questions about Domains and DNS

  - by ShoX

  Hi, I am totally new to the DNS and server hosting world and not quite sure what I need. I want to get a domain, forward it to my own server, so that the user sees example.com in the url bar and example.com/foo/bar will work. Depending on what subdomain it is, it should do different things (another base-directory at webserver, ftp, etc). Also my email should be able to be sent to and received by that server. What irritates me, is the fact, that in the A-record I can only list IP-addresses and no ports. So do I have to set up a nameserver on my own server? Or do I accomplish this via vhosts on my webserver? I would appreciate any help or link to a tutorial. I know how DNS works, know some basic apache-stuff, etc... so no need to explain that. Thanks

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• Empty sshd_config file

  - by Thomas

  I run a Centos 5 server with a LAMP stack. I was told this morning that the server was down not serving web content. I then tried to restart httpd but it failed due to another process was listening on port 443. I checked what process was running on 443 using netstat and it was sshd. I then checked the sshd_config file to check the ports that sshd was running on but the sshd_config file was completely blank. I than ran chkrootkit and it flagged not suspicions. What could of caused the sshd_config file to be blank, and sshd service to be restarted? I would really value your thoughts. All the best.

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• Remote Control Home PC from Corporate Work PC

  - by muncherelli

  Here is my situation: I am currently on a Windows XP workstation at work. I have an android tablet that I use to splashtop into my home PC. I would like to be able to use my work keyboard and mouse to control my home PC while I am splashtop'd into it using my tablet. My work PC is on a corporate LAN, and not on the same network as my tablet. The company I work for provides wifi for personal devices, but they are not accessable to the internal network. I thought about going the Synergy route, however that would require my home PC to be able to connect to my work PC which isn't really possible. The opposite would work though, if I could reverse connect the server to the client, but the Synergy software doesn't really support that. I do have a couple linux boxes running at home, so I can ssh into my home network and tunnel ports via SSH if needed. With what I have, how can I accomplish seamless keyboard and mouse sharing between my work PC and either my home PC or my android tablet?

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• Using a 3g usb dongle as Cisco router access point

  - by beakersoft

  We have an office opening, and we aren't going to have comms into the building when management want the building to open. Our only option (I think) Is to try and hook up a 3/4g dongle to something to act as the access point, and send all the traffic via that. The model of router we use wont support the usb dongle, so we need some sort of 'bridge' My idea was to build a Linux box, plug the dongle into that and then via the Ethernet ports plug the router in. We need the Cisco router in the equation as we create VPN connections over that back to head office. My question is will this work?

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• ASA firewalls: how does stateful filtering affect my access lists?

  - by Nate

  Ok, so assume that I have an ingress access list that looks like this: access-list outside_in extended ip permit any X.Y.Z.1 eq 25 access-group outside_in in interface outside And I want to do egress filtering. I want to allow inside machines to respond on port 80, and I want to allow ports over 1024. Given that the firewall is statefull, do I need to have the rule access-list inside_in extended ip permit X.Y.Z.1 any eq 25 in my inside_in ACL, or can I get away with just access-list inside_in extended ip permit any any gt 1024 access-group inside_in in interface inside In other words, if I apply an egress access list, do I have to explicitly allow machines to respond to requests allowed by the ingress access list, or does the statefullness of the firewall handle that for me? Thanks!

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• Linksys WRT54GS V6 Router Blinking Power Light

  - by Frank

  I have a Linksys WRT54GS V6 Router in my possession got it at my local goodwill for 5$. Upon start up the Power LED starts flashing like crazy and at the same time the Ethernet ports all light up once then turn off (DMZ and WLAN never turn on). I can ping the router only by setting a static IP on my Pc. I can also successfully push a file (official Linksys OS and DD-wrt) into it via TFTP but this currently does nothing (no 192.1681.1 Access). Any ideas as to what may be wrong? I think its pretty obvious that it's bricked but.. I keep hearing a whole lot of "if it pings it's fixable" on the internet.

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• Set up a root server using Ubuntu and Virtualization

  - by Daniel Völkerts

  Hello, I'd like to setup a fresh root server and install a linux based virtualization on it. My thoughts are on: Intel VTs Hardware Ubuntu 9.10 KVM based virt. The access to the root server will only be SSH for Administration. Has anybody done this before, what was your glues discovered in the daily use? My requirements are: very secure, so the root server only has ssh to the dom-0 and minimalistic ports for the guest (e.g. http/s). good monitoring of host/guest (my idea is to using zabbix for it) easy and fast administration (how are the command line tools working for you? cryptiv? high learning curve?) I'm pleased to learn from your suggestions. Regards, Daniel Völkerts

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