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• Most secure way of connecting an intranet to an external server

  - by Eitan

  I have an internal server that hosts an asp.net intranet application. I want to keep it completely and utterly secure and private however we need to expose some information through a WCF service to another server which hosts our external websites which CAN be accessed by the public. What is the best way to pass information between the two servers with regards to an IT setup, while keeping the intranet in house server completely secure and inaccessible? I've heard VPN was the way to go but I wanted to be sure this was the safest way. Another question what would be the most secure way of passing data in the WCF service?

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• Log centralization, display, transport and aggregation at scale v2

  - by Eric DANNIELOU

  This is a duplicate question of Log transport and aggregation at scale and http://stackoverflow.com/questions/1737693/whats-the-best-practice-for-centralised-logging, but the answers might differ now : The softwares described in 2009 may have changed since (for example Octopussy evolved from version 0.9 to 1.0.5). Rsyslog has become the default on most linux distro. Requirements have changed (security, software configuration management, ...). I'd like to ask the following questions : How do you centralize, display and archive system logs? How would you like to do it now if you had to? Most linux distro use rsyslog nowadays, which can provide reliable log transport. But some older unices, network devices and maybe windows box still use old udp rfc-style transport. How did you manage to get reliable transport? Storing logs for a few months can represent a huge amount of disk space. How do you store them? rdbms? Compressed and encrypted text files?

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• Two Network Adapters on Hyper-V Host - Best way to configure?

  - by GoNorthWest

  Hi, I have two physical network adapters installed in my Hyper-V host. I want one to be dedicated to the host, and the other to provide external network services to the VMs. Would the appropriate configuration be as such: Leave the first physical network adapter alone, assigning it the host IP, but not using it to create any Virtual Netorks For the second physical adapter, I would create an External Network, along with a Microsoft Virtual Switch, and use that to provide network services to the VMs. Each virtual NIC for the VM would be associated with that External Network. A static IP would be assigned to this adapter, and each VM would be assigned a static IP as well. The above seems reasonable to me, but I'm not sure if it's correct. Does anyone have any thoughts? Thanks! Mark

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• What could prevent one Amazon EC2 instance from pinging another instance's Private IP?

  - by ks78

  I have multiple Amazon EC2 instances which need to communicate using private IPs. However, so far I've been unable to ping one instance's private IP from another instance. I can ping external addresses, such as their Elastic IPs and other sites (yahoo, google, etc), so it seems there's nothing wrong with the instances' network configuration. Also, they are all in the same zone, so that shouldn't be an issue. Does anyone have any idea what I could be doing wrong? Could this related to the Security Group settings?

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• Again WPA Connection problem even after changed to latest version ..please help

  - by Renjith G

  I am using hostapd, wireless tools with madwifi for my wireless ap in my board. The WEP, WPA-PSK connections and communications between my board with linux and my desktop PC, Windows XP SP2 (with Olitec USB wireless) are fine. But when I configured the WPA type, the connection seems established but shows the status "TKIP - Key Absent" in the security dialog box. Anyone faced this problem? Am attaching the conf files and the connection status. In the AP side am complaining . I am using the in built radius server conf with the hostapd 0.4.7 hostapd.conf interface=ath0 driver=madwifi logger_syslog=0 logger_syslog_level=0 logger_stdout=0 logger_stdout_level=0 debug=0 eapol_key_index_workaround=1 dump_file=/tmp/hostapd.dump.0.0 ssid=Renjith G wpa wpa=1 wpa_passphrase=mypassphrase wpa_key_mgmt=WPA-EAP wpa_pairwise=TKIP CCMP wpa_group_rekey=600 macaddr_acl=2 /* commented */ ieee8021x=1 /* commented */ eap_authenticator=1 own_ip_addr=172.16.25.1 nas_identifier=renjithg.com auth_server_addr=172.16.25.1 auth_server_port=1812 auth_server_shared_secret=key1 ca_cert=/flash1/ca.crt server_cert=/flash1/server.crt eap_user_file=/etc/hostapd.eap_user hostapd.eap_user "*@renjithg.com" TLS And the commands am using are wlanconfig ath0 create wlandev wifi0 wlanmode ap iwconfig ath0 essid Renjith channel 6 ifconfig ath0 192.168.25.1 netmask 255.255.255.0 up hostapd -ddd /etc/hostapd.conf Please correct if am wrong .. Also am getting the debug messages on my AP when am connecting in my windows machine through WPA ~/wlanexe # ./hostapd -ddd /etc/hostapd.conf Configuration file: /etc/hostapd.conf Line 18: obsolete eap_authenticator used; this has been renamed to eap_server madwifi_set_iface_flags: dev_up=0 Using interface ath0 with hwaddr 00:0b:6b:33:8c:30 and ssid 'Renjith G wpa' madwifi_set_ieee8021x: enabled=1 madwifi_configure_wpa: group key cipher=1 madwifi_configure_wpa: pairwise key ciphers=0xa madwifi_configure_wpa: key management algorithms=0x1 madwifi_configure_wpa: rsn capabilities=0x0 madwifi_configure_wpa: enable WPA= 0x1 madwifi_set_iface_flags: dev_up=1 madwifi_set_privacy: enabled=1 WPA: group state machine entering state GTK_INIT GMK - hexdump(len=32): 9c 77 cd 38 5a 60 3b 16 8a 22 90 e8 65 b3 c2 86 40 5c be c3 dd 84 3e df 58 1d 16 61 1d 13 d1 f2 GTK - hexdump(len=32): 02 78 d7 d3 5d 15 e3 89 9c 62 a8 fe 8a 0f 40 28 ba dc cd bc 07 f4 59 88 1c 08 84 2b 49 3d e2 32 WPA: group state machine entering state SETKEYSDONE madwifi_set_key: alg=TKIP addr=00:00:00:00:00:00 key_idx=1 Flushing old station entries madwifi_sta_deauth: addr=ff:ff:ff:ff:ff:ff reason_code=3 Deauthenticate all stations l2_packet_receive - recvfrom: Network is down Wireless event: cmd=0x8c03 len=20 New STA WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state INITIALIZE madwifi_del_key: addr=00:0a:78:a0:0b:09 key_idx=0 WPA: 00:0a:78:a0:0b:09 WPA_PTK_GROUP entering state IDLE WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state AUTHENTICATION WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state AUTHENTICATION2 IEEE 802.1X: 4 bytes from 00:0a:78:a0:0b:09 IEEE 802.1X: version=1 type=1 length=0 Wireless event: cmd=0x8c04 len=20 madwifi_del_key: addr=00:0a:78:a0:0b:09 key_idx=0 ioctl[unknown???]: Invalid argument WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state DISCONNECTED WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state INITIALIZE madwifi_del_key: addr=00:0a:78:a0:0b:09 key_idx=0 ioctl[unknown???]: Invalid argument Wireless event: cmd=0x8c03 len=20 New STA WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state INITIALIZE madwifi_del_key: addr=00:0a:78:a0:0b:09 key_idx=0 WPA: 00:0a:78:a0:0b:09 WPA_PTK_GROUP entering state IDLE WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state AUTHENTICATION WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state AUTHENTICATION2 IEEE 802.1X: 4 bytes from 00:0a:78:a0:0b:09 IEEE 802.1X: version=1 type=1 length=0 < Register Fail < Register Fail Wireless event: cmd=0x8c04 len=20 madwifi_del_key: addr=00:0a:78:a0:0b:09 key_idx=0 ioctl[unknown???]: Invalid argument WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state DISCONNECTED WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state INITIALIZE madwifi_del_key: addr=00:0a:78:a0:0b:09 key_idx=0 ioctl[unknown???]: Invalid argument Wireless event: cmd=0x8c03 len=20 New STA WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state INITIALIZE madwifi_del_key: addr=00:0a:78:a0:0b:09 key_idx=0 WPA: 00:0a:78:a0:0b:09 WPA_PTK_GROUP entering state IDLE WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state AUTHENTICATION WPA: 00:0a:78:a0:0b:09 WPA_PTK entering state AUTHENTICATION2 IEEE 802.1X: 4 bytes from 00:0a:78:a0:0b:09 IEEE 802.1X: version=1 type=1 length=0 NOW am getting the following error message with latest tools. *This is the latest error messages..please refer this only..* ~/wlanexe # ./hostapd -ddd /etc/hostapd.conf TLS: Trusted root certificate(s) loaded madwifi_set_iface_flags: dev_up=0 madwifi_set_privacy: enabled=0 BSS count 1, BSSID mask ff:ff:ff:ff:ff:ff (0 bits) Flushing old station entries madwifi_sta_deauth: addr=ff:ff:ff:ff:ff:ff reason_code=3 ioctl[IEEE80211_IOCTL_SETMLME]: Invalid argument madwifi_sta_deauth: Failed to deauth STA (addr ff:ff:ff:ff:ff:ff reason 3) Could not connect to kernel driver. Deauthenticate all stations madwifi_sta_deauth: addr=ff:ff:ff:ff:ff:ff reason_code=2 ioctl[IEEE80211_IOCTL_SETMLME]: Invalid argument madwifi_sta_deauth: Failed to deauth STA (addr ff:ff:ff:ff:ff:ff reason 2) madwifi_set_privacy: enabled=0 madwifi_del_key: addr=00:00:00:00:00:00 key_idx=0 madwifi_del_key: addr=00:00:00:00:00:00 key_idx=1 madwifi_del_key: addr=00:00:00:00:00:00 key_idx=2 madwifi_del_key: addr=00:00:00:00:00:00 key_idx=3 Using interface ath0 with hwaddr 00:0b:6b:33:8c:30 and ssid 'RenjithGwpa' SSID - hexdump_ascii(len=11): 52 65 6e 6a 69 74 68 47 77 70 61 RenjithGwpa PSK (ASCII passphrase) - hexdump_ascii(len=12): 6d 79 70 61 73 73 70 68 72 61 73 65 mypassphrase PSK (from passphrase) - hexdump(len=32): a6 55 3e 76 94 8b d9 81 a1 22 5e 24 29 83 33 86 11 a8 7e 93 19 7c a9 ab ab cc 12 58 37 e5 35 b6 RADIUS local address: 172.16.25.1:1024 madwifi_set_ieee8021x: enabled=1 madwifi_configure_wpa: group key cipher=1 madwifi_configure_wpa: pairwise key ciphers=0xa madwifi_configure_wpa: key management algorithms=0x1 madwifi_configure_wpa: rsn capabilities=0x0 madwifi_configure_wpa: enable WPA=0x1 WPA: group state machine entering state GTK_INIT (VLAN-ID 0) GMK - hexdump(len=32): [REMOVED] GTK - hexdump(len=32): [REMOVED] WPA: group state machine entering state SETKEYSDONE (VLAN-ID 0) madwifi_set_key: alg=TKIP addr=00:00:00:00:00:00 key_idx=1 madwifi_set_privacy: enabled=1 madwifi_set_iface_flags: dev_up=1 ath0: Setup of interface done. l2_packet_receive - recvfrom: Network is down Wireless event: cmd=0x8b1a len=24 Wireless event: cmd=0x8c03 len=20 New STA ioctl[unknown???]: Invalid argument madwifi_process_wpa_ie: Failed to get WPA/RSN IE Failed to get WPA/RSN information element. Data frame from not associated STA 00:0a:78:a0:0b:09 Wireless event: cmd=0x8c04 len=20 Wireless event: cmd=0x8c03 len=20 New STA ioctl[unknown???]: Invalid argument madwifi_process_wpa_ie: Failed to get WPA/RSN IE Failed to get WPA/RSN information element. Data frame from not associated STA 00:0a:78:a0:0b:09 Data frame from not associated STA 00:0a:78:a0:0b:09 Data frame from not associated STA 00:0a:78:a0:0b:09 Wireless event: cmd=0x8c04 len=20 Wireless event: cmd=0x8c03 len=20 New STA ioctl[unknown???]: Invalid argument madwifi_process_wpa_ie: Failed to get WPA/RSN IE Failed to get WPA/RSN information element. Data frame from not associated STA 00:0a:78:a0:0b:09

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• Other user SSHed from my hardware

  - by Alex

  While logged into our HPC cluster I used w to check out who else was logged in. I happened to notice that it looks like there's another user logged in from my (personal) computer; 19:04:47 up 40 days, 6:39, 44 users, load average: 0.10, 0.14, 0.18 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT ME pts/4 zerg.neuron12. 18:55 0.00s 0.09s 0.04s w SOMEONE_ELSE pts/35 zerg.neuron12. Sat14 2:27m 0.08s 0.08s -bash Is this something I should be worried out - I tried to kill the other session but had a permission denied message. Is it possible we just both have the same hardware name? I'd have thought that if this were the case the server would give one of us a different name (e.g. zerg1) when we logged in to prevent confusion. This is not an area I have any experience with, so any advice would be greatly appreciated!

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• Wake On Lan for Fedora 12

  - by Toymakerii

  I have a fedora 12 box that I am using as a sandbox for web development and a few other toys. The box gets really hot so I would like it to sleep/hibernate when no one is using it, however most of the people connecting to the box will not be able to access it physically. Is it possible to set up a Wake On Lan that wakes up the machine when it detects an SSH connection? A google search didn't yield much information. (or atleast I wasn't smart enough to register it as useful!)

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• Problem with Lenovo x200s Wifi under Ubutu Karmic

  - by oneself

  Hi, I have just gotten my Lenovo X200s laptop, and I am install Ubuntu 9.10 Karmic on it. The installation went through without a hitch, but I can't get my wifi to work. lspci | grep Network Produces the following results: 00:19.0 Ethernet controller: Intel Corporation 82567LM Gigabit Network Connection (rev 03) 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device 8172 (rev 10) The weird part is that when I turn the wifi hardware stitch on and off on the side of the laptop, I get the following printed in /var/log messages: Dec 30 23:24:48 temp-laptop kernel: [ 213.432302] usb 4-2: USB disconnect, address 2 Dec 30 23:24:52 temp-laptop kernel: [ 217.276310] usb 4-2: new full speed USB device using uhci_hcd and address 3 Dec 30 23:24:52 temp-laptop kernel: [ 217.441759] usb 4-2: configuration #1 chosen from 1 choice Does Ubuntu think my wifi card is a USB device? Am I missing some driver? What can I do to fix this? Please, help!

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• Handheld Linux device can't see one wireless network

  - by Nathan

  I'm using a Nokia N810 running OS 2008 (version 5.2008.43-7; should be the latest). It can see networks up and down the street in my neighborhood and can connect to mine using WEP. I can also connect to free networks at restaurants and the like. When I bring it into work, it can't see a wireless network ("No connections available"). When I use netstumbler on my laptop I can see a list of several essids showing green connectivity for the network. I know that the network has its essid broadcast, and I know that it's unsecured. When I run iwlist wlan0 scan, I see several APs with no essid, but I don't see anything with an essid set. I have verified using iwlist that my hardware supports the correct channels and speeds. I know this isn't a Nokia/mobile forum, but it's running what's basically a Debian kernel. Any suggestions on what to do in this case? I'm really frustrated by this. Thanks, Nathan

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• Top ten security tips for non-technical users

  - by Justin

  I'm giving a presentation later this week to the staff at the company where I work. The goal of the presentation is to serve as a refresher/remidner of good practices that can help keep our network secure. The audience is made up of both programmers and non-technical staff, so the presentation is geared for non-technical users. I want part of this presentation to be a top list of "tips". The list needs to be short (to encourage memory) and be specific and relevant to the user. I have the following five items so far: Never open an attachment you didn't expect Only download software from a trusted source, like download.com Do not distribute passwords when requested via phone or email Be wary of social engineering Do not store sensitive data on an FTP server Some clarifications: This is for our work network These need to be "best practices" tips for the end-user, not IT policy We have backups, OS patches, firewall, AV, etc, all centrally managed This is for a small business (less than 25 people) I have two questions: Do you suggest any additional items? Do you suggest any changes to existing items?

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• correct routing for multiple devices

  - by helmi

  I have Debian Lenny machine with 3 interfaces enabled (eth0-2), and I have problems as follow. eth1 is connected to a router and this router has portforwarding for port80. eth2 is connected direct to the internet If I open a website hosted on my system via the router it works fine. If I try to open the same via the eth2 connetion it does not! tshark shows incomming trafic on eth2 but nothing goes out there. iptabes accepts all My routing table: Ziel Router Genmask Flags Metric Ref Use Iface 10.9.0.2 * 255.255.255.255 UH 0 0 0 tun0 212.236.24.128 * 255.255.255.224 U 0 0 0 eth2 192.168.1.0 * 255.255.255.0 U 0 0 0 eth1 192.168.0.0 * 255.255.255.0 U 0 0 0 eth0 10.9.0.0 10.9.0.2 255.255.255.0 UG 0 0 0 tun0 default 192.168.1.1 0.0.0.0 UG 0 0 0 eth1 default 212.236.024.129 0.0.0.0 UG 0 0 0 eth2 default 192.168.0.1 0.0.0.0 UG 0 0 0 eth0

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• How do I increase my home's bandwidth?

  - by Derek

  I just mistakingly posted this on Stack Exchange but don't know how to delete it... Anyway, I was thinking of building a home server to use instead of renting a VPS, because in the long run it would be cheaper. What I'm concerned with is the bandwidth limit of my house. I know when I'm downloading something off the internet, if I download at high speeds the rest of the computers connected to my router will become slower. Is there any way to avoid this? There are other cable outlets in my house, will connecting a modem and router there avoid this problem?

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• allow SSH to bypass VPN on OSX mavericks, openvpn, pf

  - by zycho42

  My home computer connects to the internet through an OpenVPN connection. However, I would like to be able to connect to my home computer from outside over ssh. Ssh is set up and working, but when I connect to the vpn ssh is only accessible from inside my home network. I figure what's going wrong is my router forwards incoming ssh connections to my mac, but then my mac replies over the vpn, so the connection from outside times out. I've got pf set up for a couple of other things, but I can't figure out how to let the ssh replies bypass the vpn using pf. I've come across other solutions that use ip tables, routing tables and rules, but I can't figure out how to set that up on mavericks. I've been searching for this for a while now but I haven't found a working solution. Any help would be greatly appreciated!

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• Bridged network on OS X only gets UDP broadcast traffic

  - by a paid nerd

  I've created a bridged network Mac OS X 10.8.5 using ifconfig and TUNTAP for OS X to bridge my wireless connection, en0, with a virtual interface, tap0, which I can use for guest VMs: $ sudo sysctl -w net.inet.ip.forwarding=1 $ sudo sysctl -w net.link.ether.inet.proxyall=1 $ sudo sysctl -w net.inet.ip.fw.enable=1 $ sudo ifconfig bridge0 create $ sudo ifconfig bridge0 addm en0 addm tap0 $ sudo ifconfig bridge0 up $ ifconfig en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ether 28:cf:xx:xx:xx:xx inet6 xxxx::xxxx:xxxx:xxxx:xxxx%en0 prefixlen 64 scopeid 0x4 inet 192.168.100.64 netmask 0xffffff00 broadcast 192.168.100.1 media: autoselect status: active bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ether ac:de:xx:xx:xx:xx Configuration: priority 0 hellotime 0 fwddelay 0 maxage 0 ipfilter disabled flags 0x2 member: en0 flags=3<LEARNING,DISCOVER> port 4 priority 0 path cost 0 member: tap0 flags=3<LEARNING,DISCOVER> port 8 priority 0 path cost 0 tap0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 ether ca:3d:xx:xx:xx:xx open (pid 88244) However, if I tcpdump -i tap0, I only see broadcast traffic. Shouldn't I see a mirror of everything on en0? (192.168.100.33, the host doing the broadcasting, is another unrelate, noisy server on my LAN.) (I asked a similar question here and will probably close it.)

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• Rate limit a wireless interface

  - by Jamie Hankins

  I have access to my routers SSH and IPTables. I want to rate limit my guest network to 1Mb/s so they can't guzzle my bandwidth. rai1 RTWIFI SoftAP ESSID:"GuestNetwork" Nickname:"" Mode:Managed Channel=6 Access Point: :F9 Bit Rate=300 Mb/s wdsi0 RTWIFI SoftAP ESSID:"YouCan'tTouchThis" Nickname:"" Mode:Managed Channel=6 Access Point: :F8 Bit Rate=300 Mb/s wdsi1 RTWIFI SoftAP ESSID:"YouCan'tTouchThis" Nickname:"" Mode:Managed Channel=6 Access Point: :F9 Bit Rate=300 Mb/s wdsi2 RTWIFI SoftAP ESSID:"YouCan'tTouchThis" Nickname:"" Mode:Managed Channel=6 Access Point: Not-Associated Bit Rate:300 Mb/s wdsi3 RTWIFI SoftAP ESSID:"YouCan'tTouchThis" Nickname:"" Mode:Managed Channel=6 Access Point: Not-Associated Bit Rate:300 Mb/s I'm just wondering the command I need to limit it. I tried the iwconfig limit command but it failed. Thanks

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• How to prevent Ubuntu from combining networks on 2 NIC server?

  - by SolarPower

  I've got a Ubuntu Server 10.10 with 2 network interfaces with a cable plugged into both going to switches on completely different networks with different routers. One network is the 10.1.10.X network with a separate gateway/router - the server has an IP of 10.1.10.50 with the gateway IP of 10.1.10.1. The other interface is 10.2.10.X, IP 10.2.10.50, gateway 10.2.10.1. All my Mac machines are on the 10.2.10.X network, and all servers on the 10.1.10.X. The ONLY connection between the two is this machine. From a Mac in my office, I CANNOT ping any computer on the 10.1.10.X network except the Ubuntu machine I'm talking about. However, under the Shared column in Finder, I can see every server on the other network listed. That makes me believe that somehow this Ubuntu machine is letting certain requests span both networks, which is a security problem. Hope this is enough info.

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• Where should executables be run from? Network share or client?

  - by user74150

  We have an executable that is used by 50+ client machines on a network and upgraded regularly. Is it acceptable to put the executable on a network share and have the client machines run it from there via a shortcut on their desktop? That way when we upgrade the .exe we can simply replace the one file with a new one and all clients will be accessing the new one. How will a slow or unstable network handle this? If this is not acceptable, what would be the best way to keep all clients updated with the latest .exe?

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• Should I enabled 802.3x hardware flow control?

  - by Stu Thompson

  What is the conventional wisdom regarding 802.3x flow control? I'm setting up a network at a new colo and am wondering if I should be enabling it or not. My oh-cool-a-bright-and-shiny-new-toy self wants to enable it, but this seems like one of those decisions that could blow up in my face later on. My network: An HP ProCurve 2510G-24 switch A pair of Debian 5 HP DL380 G5's with built-in NC373i 2-port NIC LACP'd as one link. 9000 jumbo frames enabled. (Application) A pair of hand-built Ubuntu server with 4-port Intel Pro/1000 LACP'd as one link. 9000 jumbo frames enabled. (NAS) A few other servers with with single 1Gbps ports, but one with 100Mbps. Most of this kit is 802.3x. I've been enabling it as I go along, and am about to test the network. But as my 'go live' day nears, I am worried about the 802.3x decision as I've never explicitly used it before. Also, I've read some 10-year old articles out there on the Intertubes that warn against using flow control. Should I be enabling 802.3x hardware flow control?

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• Loadbalance UDP traffic with session affinity and way to take servers in & out of rotation

  - by William

  What is the best way to go about load balancing UDP traffic among a whole bunch of servers, while keeping session affinity based on the users' IP? I need to also be able to take servers in and out of rotation for new clients, so when they join for the first time, they get put on a server in a list of available servers, and clients already connected would stay connected to their specific server. I have written the software to maintain a list, but I can't seem to find anything that would perform this functionality. If you need the context, this is to facilitate game tournaments for Minecraft: Pocket Edition, which is done with UDP traffic, I cannot change the protocol. And, because tournaments open and close, I need to be able to place players on their proper servers. Performance is also a priority, I have a program to do this but it is very bloated and slow. Thanks for any help! William

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• Router reconfigures PC's and they can no longer access the internet via hardwired connection to DSL Modem

  - by zchads

  Router reconfigures PC's and they can no longer access the internet via hardwired connection to DSL Modem. Hardware Information: Buffalo Wireless Router/access point, Model: WZR-HP-G300NH-AP DSL Modem: Generic (actually not sure of manufacture). Service Provider: TOT (Thailand) Laptop-1: Windows XP and Belkin PCMIA Network Card Laptop-2: Windows XP unknown network card & Wifi Laptop-3: Windows 7 unknown network card & Wifi Outline of Problem/actions taken: After a recent power failure the router and laptop-1 connected to router were no longer able to access the internet. Actions taken to try and recover internet access: Using Laptop-1 tried to configure Router with PPPoe settings using software from Router Manufacture. During the installation process a Timeout error was experienced, unable to connect to WAN. Used Internet Explorer to communicate directly with Router using IP address. Changed settings to use PPPoe settings given by ISP. Router was not able to communicate with Internet. Repeated steps 1-4 again with no success. Reset Router and DSL modem. Repeated steps 1-4 again still no success. Tried connecting Laptop-1 directly to DSL to gain access to internet to research problem. No Network connection with DSL could be established…connection would be established for a second and then be lost and didn’t appear long enough to actually connect to DSL. Replugged LAN back into Router and connection was regained with laptop-1. Replugged Laptop-1 directly into DSL and again unable to establish network connection. Uninstalled network card and all of its drivers on Laptop-1. Reinstalled network card and drivers and tried connecting directly to DSL. Still unable to make network connection. Plugged DSL into Laptop-3 and Internet connection was established. Being Laptop-3 does not have a CD-Rom, Laptop-2 was tried to connect to the router. With Laptop-2 steps 1-7 ended up being repeated without success. Tried plugging Laptop-2 directly into DSL and again no network connection could be established. Using Laptop-3 with a direct connection to DSL downloaded latest Router FW. Installed router FW using Laptop-1. Tired the installation process again without success. Being desperate reinstalled OS on Laptop-1 still not success. Tried using “ipconfig” with router to see what was going on without success. With laptop-1 connected to DSL went through the “ipconfig /…” inputs to see if anything made a difference. Being the network card was not able to make a connection this provide very little information “media disconnected”. So now I have a router and two laptops which are unable to connect to the internet and sure could use some advice/help.

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• Linux Transparent Bridge for Network

  - by Blackninja543

  I am attempting to set up a semi-transparent bridge. I say semi because I want it to act as a transparent tap for all traffic moving through both sides of the bridge. What I also want is to have the "green zone" accessible to a web interface for the bridge that will display all results of the IDS and other network monitoring tools. My example would be as such: eth0 <--> bridge(br0) <--> eth1 The entire network would be on the same subset however anything coming from eth0 to eth1 would be accepted. The only time anything would be drop is if the eth0 attempted to access br0. If someone attempts to access the web interface on br0 through eth1 it will succeed. My biggest problem I feel is if I attempt to block anything from eth0 to br0 this will drop the bridge all together.

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• Failed to mount to nfs server with "Program not Registered"

  - by Farrel

  I'm trying to setup nfs server on Fedora 17 and I'm getting "Program not Registered" error when I'm trying to mount. I guess the main reason for this is rpcbind. I'm a newbie in linux, so I don't know what info should I provide you with. Here is some info that might be useful. rpcinfo -p program vers proto port service 100000 4 tcp 111 portmapper 100000 3 tcp 111 portmapper 100000 2 tcp 111 portmapper 100000 4 udp 111 portmapper 100000 3 udp 111 portmapper 100000 2 udp 111 portmapper 100005 1 udp 20048 mountd 100005 1 tcp 20048 mountd 100005 2 udp 20048 mountd 100005 2 tcp 20048 mountd 100005 3 udp 20048 mountd 100005 3 tcp 20048 mountd 100024 1 udp 42223 status 100024 1 tcp 50054 status cat /etc/exports /home/Farrel/prog 192.168.xxx.xxx (ro,sync) service nfs status Redirecting to /bin/systemctl status nfs.service nfs-server.service - NFS Server Loaded: loaded (/usr/lib/systemd/system/nfs-server.service; enabled) Active: active (exited) since Fri, 02 Nov 2012 09:29:04 +0300; 5min ago Process: 924 ExecStartPost=/usr/lib/nfs-utils/scripts/nfs-server.postconfig (code=exited, status=0/SUCCESS) Process: 909 ExecStart=/usr/sbin/rpc.nfsd $RPCNFSDARGS ${RPCNFSDCOUNT} (code=exited, status=0/SUCCESS) Process: 885 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=0/SUCCESS) Process: 864 ExecStartPre=/usr/lib/nfs-utils/scripts/nfs-server.preconfig (code=exited, status=0/SUCCESS) CGroup: name=systemd:/system/nfs-server.service Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable. Firewall is disabled on both systems. I spent a lot of time reading on the topic but all manuals on setting up nfs server lead to "Program not Registered" error. Any how-to-fix-it ideas?

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• 2 nics. 2 Defaults Gateways

  - by andre.dias

  Here is my scenario: i have this server with 2 nics, each one with different IPs, connected to differents routers. Almost everything is configured whe way i need. Traffic coming from eth0 exits using eth0, traffic coming from eth1 exits using eth1. And there is a default gateway configured. $route: default IP 0.0.0.0 UG 0 0 0 eth0 With this configuration, the traffic generated in the server is going out using eth0 (lynx www.google.com for example). The problem is: the Internet link from eth0 went down today. The traffic coming from eth1 was ok...no problem. But the traffic generated in the server was a problem...the default gateway was out...no access do the Internet anymore (no more lynx www.google.com) So i added a new default gateway configuration, pointing to eth1. For 30 minutes i kept that way...2 default gateways, but just one was "working"...and everything was working just fine. But then i removed de eth0 gateway entry because, well, 2 default gateways is kind of weird. My question: is there any problem on keeping these 2 default gateways, one for each? So i don´t need to do nothing when one link go down again? $route: default IP1 0.0.0.0 UG 0 0 0 eth0 default IP2 0.0.0.0 UG 0 0 0 eth1

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• Slower wireless speed in Ubuntu 12.04 (64-bit) on Asus USB-N13

  - by PhantonTurtle

  I have an Asus USB-N13 which I use for wireless internet on my desktop. The download speed I get on Windows 7 (dual-boot) is 15.22 Mbps. On Ubuntu 12.04 (64-bit) I can only get 1.09 Mbps. I asked a question about this on the Ubuntu forums as well, but I did not get an answer. Here is the output from lsmod | grep rt which gives me, parport_pc 32866 0 rtl8192cu 103297 0 rtl8192c_common 75767 1 rtl8192cu rtlwifi 111202 1 rtl8192cu mac80211 506816 3 rtl8192cu,rtl8192c_common,rtlwifi cfg80211 205544 2 rtlwifi,mac80211 parport 46562 3 parport_pc,ppdev,lp I installed the drivers from Realtek (my chipset is Realtek, not Ralink) but that did not work.

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• How can I get my routers to forward ports correctly?

  - by Giffyguy

  My network currently looks like this (simplified): Note that Router #2 is connected to the LAN interface of Router #1. This should be familiar to anyone who has seen a standard static-IP setup with an additional firewall for a residence or other small building. Router #1 is actually my cable gateway, but since it is a fully functional router/firewall, I am going to refer to it as a router. Now, I need to open various ports in both firewalls for incoming communication to my server - port 80 is a good example. So I've opened up port 80 in Router #2, and so far all incoming traffic at the public IP X.X.X.129 is being routed correctly. The problem is that I also need my server to respond to incoming traffic at the public IP X.X.X.130 on the WAN interface of Router #1. Naturally, I can't just tell Router #1 to forward port 80 to another public IP. Port forwarding is only supported when the traffic is being directed to the LAN subnet. I am willing to restructure my network topology if required, with the following conditions: Router #1 cannot have its WAN IP reassigned - X.X.X.130 is mandatory. Router #1 cannot be moved or disconnected from the cloud. The server cannot be given a second IP address. I would prefer the server to have a private IP address - e.g. 10.0.0.10 I'd like to keep Router #2, but it can have a private IP - e.g. 10.0.1.10 Following these rules, I need to get my server to receive incoming traffic on port 80 from both public IP addresses. Does anyone on SU know if this is possible? So far my only theories have been to set up a static route on either router, or to somehow combine my two subnets into a single subnet.

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