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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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• Internet connection sharing: Ubuntu 9.10 Server on Windows 7 and VMWare

  - by avesse

  I'm trying to get Internet Connection Sharing (ICS) working between my Windows 7 RTM host and a Ubuntu 9.10 Server running on VMWare Workstation 6.5, but I have not been able to get it right. Here's what I have done: Configured VMWare to use Host Only networking (I tried NAT as well). Enabled ICS on my host's network connection, allowing VMnet1. After enabling it, Windows informed me that its VMnet1 IP has changed to 192.168.137.1. So in VMWare's Virtual Network Editor I configured VMnet1: Subnet 192.168.137.0 Mask 255.255.255.0 I did the same for DHCP. For NAT i set 192.168.137.1 as Gateway. I cannot ping any sites or get access through apt-get/aptitude install/update, although domains do get resolved to IPs. I have also tried using a static IP in Ubuntu. I don't know if it makes a difference, but my external IP is locked to my host's MAC address.

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• Can't connect to Windows Server 2008 shared folders via VPN connection

  - by Pearl

  I set up an VPN connection on my 2008 server using RRAS. The VPN seems to work fine. I can connect from outside the network. I am also able to establish a remote access connection via the VPN-IP. However, I can't access my shared folders. After connecting to the VPN I can ping the server, but it is not shown in my networks. using \ip or \server-name doesn't work either, cannot be found. I checked ipconfig and this is what I found regarding the VPN: DNS-Suffix: Description: test Physical Adress: DHCP activated: No Auto-Config: Yes IPv4-Adress: 192.168.2.114 Sub: 255.255.255.255 Standard-gateway: DNS-Server: 192.168.0.1 NetBIOS: activated To clarify my IP-situation: server is connected to router with 192.168.0.x, the test-client is in an external network connected to a router with 192.168.1.x, server-client connection is using static ips with 192.168.2.x Can anyone help me with this one? The VPN should be ok since I am able to establish remote access.

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• IIS7, different ports for websites but no portnumber in the browser

  - by Queensheep

  I have a windows server 2008 with IIS7 with 4 websites. In DNS I have 4 different URLs which point to the IP of the server. I configured each web site with the site bindings: website1: hostname: url1, port: 80, IP-Adresse: the adress of the server website2: hostname: url2, port: 80, IP-Adresse: the adress of the server The result is, that from the client, I can browse with all the 4 URLs to the specified web sites and everything is fine. Then I changed in IIS the port of the websites, so that website1 now uses port 8080, website2 uses port 8081, and so on. Now I have to use the browser with the url and the portnumber (like URL:8080). Is there a possibility, to configured the websites with different portnumbers but not to use the portnumbers in the browser?

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• Can I log into a Domain account without pointing DNS to the domain controller?

  - by user72593

  My situation is as follows: I have a Windows 2003 Domain Controller which is also my DNS server. I have 10 Windows XP Pro PC's which all login to domain accounts. I am about the forward my DNS requests to OPENDNS so I can regulate web access but I have (2) PC's that I would like to keep unregulated. I manually changed their DNS server IP to (8.8.8.8) which worked but that caused my login to fail (by creating a 3 minute delay before it would let me get to the desktop) when I change the DNS IP back to the IP of the Domain Controller, everything works smoothly. Question is, how can I continue to login to the domain but have a different DNS path...is this possible ?

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• How to legitimately work around ISP rate limits

  - by Derek Ting

  A lot of ISP rate limit the amount of e-mails that is sent from a particular IP address. What is the proper way to get around that rate limit? Our company has an iPhone application that sends many e-mails because of our large user base and many e-mails go to different ISPs that rate limit the number of messages coming from a specific IP. We do not send spam and we are a legitimate business. However, is there a better way to resolve this limitation rather than just getting a ton of IP addresses? Ideally, I wouldn't want to rely on a third party service to send mail. However, if its the only possible solution, we would consider.

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• PXE boot not happening due to DHCP issue .

  - by Nishant

  I could PXE boot this laptop to some extent yesterday but all of a sudden after some time it started to show this error message . I reinstalled my tftp server etc in between . It seems that DHCP lease issue is happening . The client wants some specific address I think ? How to resolve List item Client requested address 0.68.101.98 [06/06 04:37:27.658] no more address or address previously allocated by another server [06/06 04:37:27.658] Rcvd DHCP Discover Msg for IP 0.0.0.0, Mac 00:0E:7B:23:FA:11 [06/06 04:37:29.670] Client requested address 0.68.101.98 [06/06 04:37:29.670] no more address or address previously allocated by another server [06/06 04:37:29.670] Rcvd DHCP Discover Msg for IP 0.0.0.0, Mac 00:0E:7B:23:FA:11 [06/06 04:37:33.679] Client requested address 0.68.101.98 [06/06 04:37:33.679] no more address or address previously allocated by another server [06/06 04:37:33.679] Rcvd DHCP Discover Msg for IP 0.0.0.0, Mac 00:0E:7B:23:FA:11 [06/06 04:37:41.699]

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• why would you create two different subnets on the same physical network?

  - by xirtyllo

  I'm working at a messy location, one of the strange (for me) things is that on the same physical network there are two different subnets. Specifically some computers will have 10.0.0.0/24 and some others will have 172.16.0.0/24. There is only one DHCP server, which gives IPs on the 10.0.0.0/24 range, and there are two internet gateways, one with IP 172.16.0.1 and one with IP 10.0.0.1 . To give an example, I can easily swap one PC from one subnet to the other just by changing its IP and gateway settings. I am trying to imagine why they created the network this way, and which may be the possible advantages and/or drawbacks of having two different subnets on the same physical network. Any thoughts?

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• Network Configuration

  - by Dario

  Hello, This is my situation: Router A: IP 192.168.1.1 Mask 192.168.1.0/24 - Connected to the internet. Server: - Interface eth0: inet addr:10.1.1.125 Mask:255.255.255.0 (connected to router B) - Interface ra0: inet addr:192.168.1.125 Mask:255.255.255.0 (connected to router A) Router B: IP 10.1.1.254 Mask 10.1.1.0/24 - Connected to Server's eth0 Computer: connected to Router B via WiFi connection. I configured a static route on Router B that use as default gateway 192.168.1.125 and i can ping that ip from computer. The problem is: how i can connect to the internet ? In other words, traffic coming from Server eth0 should use ra0 as gateway. Any suggestion ? Thank you

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• OpenVPN Push DNS Not Working Correctly On Windows

  - by woodsbw

  I currently have OpenVPN server setup on an Ubuntu machine, as well as DNSMasq. I am wanting to push DNS to the client (road warrior setup.) I had the push "dhcp-option DNS x.x.x.x" where x.x.x.x was an open OpenDNS server, for testing, and everything was working when I connected from my Windows client But now that I have DNSMasq setup, and I changed the "dhcp-option DNS x.x.x.x" to the DNSMasq server, but when they client connects it still receives the old, OpenDNS DNS server IP. I'm at a bit of a loss here, I have tried flushing DNS on the client, rebooting the server, and I even grep'd the entire server to see if the OpenDNS IP was in some other config I was missing...it wasn't. One other note, when connect to the VPN and explicitly run nslookup against against the DNSMasq IP, the addresses resolve correctly, so it isn't a DNSMasq issue.

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• Apache localhost problem

  - by hart1994

  I have set up Apache on my Windows 7 PC. Now I have it working fine on the PC, by going to localhost or the IP (192.168.1.71). However when I go to my Mac I try to connect to it via its IP and it doesn't connect. I have also tried this on another computer. Oops! Google Chrome could not connect to 192.168.1.71 Now is there something wrong with the code in the Apache httpd file? EDIT: I have also tried to ping the IP address and it works fine.

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• Net Screen manager setup

  - by Codezy

  I'm having an issue with our NSMExpress box. I'm trying to manage all our devices, range from ns5gt to ssg320m, and some of those devices have addresses assigned by dhcp from the ISP (like pppoe or dsl). The addresses are actually static but we have the register the MAC address in order to get this address. I can actually add the device in NSM except the IP that's on the untrust side isn't imported in as it's dynamic. Because of this I cannot change many options that pertian to the untrust interface as there is no IP. I've talked to JTAC on this and they didn't know if there was a way to do this or not but then they stated that Tim Hortons does this so I'm confused on how to get this working. Maybe i'm just missing something as I imagine that other people must be doing this as well. Any assistance is appreciated! Furthermore when I import a device this is the message I get: Warnings: Interface ethernet0/0 is a pppoe/dhcp/pppoa client and its ip is NOT IMPORTED because it may be dynamic.

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• Calculate data transferred in a local LAN

  - by ramdaz

  How do you calculate the data flown between a computer and the gateway computer. I have a Linux router/gateway running IP Tables which routes internet traffic in a LAN. I have individual users with IP/MAC Address mapped who access Interet through the gateway computer. I would like to find out the traffic utilized by individual users. Is it possible for us to find out what kind of traffic was HTTP, SMTP, FTP etc. Is it also possible to pool the information on hourly basis, and get specific info so that I can store information in a database? I have heard of IP Accounting? Is that the right way

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• Microsoft ISA 2004 - Failed Connection Attempt

  - by Arief

  I have an issue where users with Android tablet cannot download apps through ISA 2004. This is what I get from the ISA 2004 logging: I did try to add the source ip address and the destination ip address in All for All Modified rule. However, it does not fix that problem. I also use GFI Web Monitoring. I did add the 151.101.13.80 ip address into the Whitelist, and no luck. What Failed Connection Attempt exactly is? How to overcome this. The Android tablet is throwing an error 495, could not be downloaded. Thanks everyone.

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• Setting up a proxy for FTP - Windows

  - by RadiantHex

  Hi folks, I have 2 windows machines and a server. 1 is my laptop, the other is a workstation that the IP of which is white-listed on the server. The laptop has a dynamic IP, so the IP cannot be white-listed. I would like to be able to perform FTP transfers from my laptop to the server, while using the workstation as a proxy. Both machines are using Windows 7. Is this possible? Help would be amazing!

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• Security question pertaining web application deployment

  - by orokusaki

  I am about to deploy a web application (in a couple months) with the following set-up (perhaps anyways): Ubuntu Lucid Lynx with: IP Tables firewall (white-list style with only 3 ports open) Custom SSH port (like 31847 or something) No "root" SSH access Long, random username (not just "admin" or something) with a long password (65 chars) PostgreSQL which only listens to localhost 256 bit SSL Cert Reverse proxy from NGINX to my application server (UWSGI) Assume that my colo is secure (Physical access isn't my concern for the time being) Application-level security (SQL injection, XSS, Directory Traversal, CSRF, etc) Perhaps IP masquerading (but I don't really understand this yet) Does this sound like a secure setup? I hear about people's web apps getting hacked all the time, and part of me thinks, "maybe they're just neglecting something", but the other part of me thinks, "maybe there's nothing you can do to protect your server, and those things are just measures to make it a little harder for script kiddies to get in". If I told you all of this, gave you my IP address, and told you what ports were available, would it be possible for you to get in (assuming you have a penetration testing tool), or is this really protected well.

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• Sonicwall settings for Polycom TFTP

  - by Michael Glenn

  I'm switching our VoIP phones (Polycom 301s and 501s) to our data network. They were previously segmented to their own network. This means disabling the DHCP on the Trixbox (Asterisk) server and configuring the Sonicwall TZ 210 DHCP to indicate that Trixbox is the TFTP server. The Polycom phones are stating "could not contact boot server". All phones are configured to TFTP and were confirmed working when previously using the Trixbox server for DHCP. Trixbox DHCP is now turned off. I've configured options 66(as String), 128(as IP) and 150(as IP) in DHCP and added them to a TFTP Option Group. I've enabled "Allow BOOTP Clients to use Range" for the Dynamic IP range and assigned the Option Group TFTP as the DHCP Generic Option Group. Any idea what I'm missing? Is there a separate tool to inspect the DHCP response to compare Trixbox to the Sonicwall?

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• How does bridged networking work?

  - by agz

  How does bridged networking work? I have looked through the virtualbox manuals but nothing extremely technical came up (It was just a generic gloss over of the topic) How does it assign a different ip to the virtual machine but uses the same network card? Why does this different ip (I found using ip addr under linux) not show up under the "attached devices section" of my router but I can port forward to it? How come if I connect to a password protected wifi network, it does not require me to enter my password? Is this multihoming?

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• Windows 2008 Incoming Connection: Where/How is Server IPv4 address defined

  - by revelate

  We're evaluating a VM hosted externally which runs Windows Server 2008 R2 Web Server Edition and wish to access it via a VPN connection for maintenance and administration. RRAS isn't included in Web Server Edition, but it does have a form of VPN server called "Incoming Connections". This appears to work well and even supports multiple simultaneous connections. As we'll be using this VPN regularly we'd like to know if this is a viable solution or if we'd be better off upgrading to Standard Edition and full-fledged RRAS. In particular we're accessing the VM via the Private IP given by the Incoming Connection (currently 169.254.135.207) so we'd like know: if the server private IP might change every so often? if so is there any way to define it manually? or should we be using the server name rather than the private IP address? if so how can we be sure that it will resolve correctly? Name resolution over the "Incoming Connection" has worked on and off during our tests. Thanks for your help

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• How to route traffic from a subnet 10.0.0.x to a network 200.208.88.17

  - by Guilherme Longo

  I have the following configuration Router : IP: 200.208.88.17 (Internet) MASK: 255.255.255.40 Server 2003 : IP: 10.0.0.1 (with dhcp server ativated) dhcp scope: 10.0.0.11 - 10.0.0.254 MASK: 255.255.255.0 clients : IP: 10.0.0.11 - 10.0.0.254 MASK: 255.255.255.0 At this point I have all computer set-up in one switch. All clients are receiving ip´s from the dhcp server. I need to enable the internet in every client. I am not sure how to route the traffic from the clients to the router that is providing internet access. Could you please point me to the right direction?

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• Posting data from multiple servers routing through one server to client server

  - by Swaroop Kundeti

  I have 5 webservers behind Load balancer and we have a client server at other end. Client has white listed my 5 webserver public ip so that my webservers will post a file to the client server. Here the problem is my webservers is going to increase and i cannot always ask client to make my new webserver ip's white list. So i would like to make my infra this way, my webservers will post data to the client server routing from a single server. Like assume that web-1 is main server and the remaining 4 web servers will post data to client server routing through main web-1. I was told that this can be achieved by doing IP Tunneling. But i have no idea how to do that. Would be great for any kind of help.

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• Qmail: relay only from selected servers based on rDNS

  - by Frank

  I'm looking for a way to disable Qmail relaying for everyone, but allow one certain group of hosts to do so. These hosts all use the same identifying rDNS entry. In Exchange 2003, Postfix, Exim and cPanel this can be achieved pretty easily. However, the only to do this with Qmail is to do this based on IP's. The IP's however tend to change. These changes can occur at any time, and it is impossible to keep all the servers up-to-date to the new IP's. Running a script that resolves the hostname and whitelists them accordingly is my last-resort option, but this is not fool-proof. Does anyone know whether this is possible and if so, how? Thanks!

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• Error with FTP since binding via httpcfg

  - by Linda

  I was in a similar posistion to this question and bound two IP addresses using httpcfg. Since doing this ftp does not seem to be working on IIS6 in Windows Server 2003. Any ideas what could be wrong? The command I ran was: httpcfg set iplisten -i xxx.xxx.x.x I get the following when I try to conenct via Filezilla: Error: Connection timed out Error: Failed to retrieve directory listing The log file is returning the following: #Software: Microsoft Internet Information Services 6.0 #Version: 1.0 #Date: 2009-08-17 13:54:05 #Fields: date time c-ip cs-username cs-method cs-uri-stem sc-status sc-win32-status 2009-08-17 13:54:05 91.85.70.17 Client [1]USER Client 331 0 2009-08-17 13:54:05 91.85.70.17 Client [1]PASS - 230 0 In the ftp site settings I have the site pointing to the IP address used using httpcfg and the port set to 21. Update: I can see a directory listing if I connect via the inbuilt commandline ftp client in wondows vista. If I try to connect via a windows explorer I start in the incorrect folder and no files are listed just directories.

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• How to stop pptpd even when there are active vpn client connections?

  - by Michael Z

  After issued command to stop pptpd, the pptpd won't stop until all the VPN client has disconnected. The following code shows pptpd is still running after issuing the stop command. ubuntu@ip-10-138-31-87:~$ sudo /etc/init.d/pptpd stop Stopping PPTP: pptpd. ubuntu@ip-10-138-31-87:~$ ps -ef |grep pptpd root 5524 1 0 21:46 ? 00:00:00 pptpd [<myIp>:8544 - 0000] root 5525 5524 0 21:46 pts/1 00:00:00 /usr/sbin/pppd local file /etc/ppp/pptpd-options 115200 192.168.0.1:192.168.0.234 ipparam <myIP> plugin /usr/lib/pptpd/pptpd-logwtmp.so pptpd-original-ip <myIP> ubuntu 5564 4668 0 21:50 pts/4 00:00:00 grep --color=auto pptpd After all the active vpn client connections were disconnected mannually, the pptpd then stops. Is there a way that pptpd can be forced to stop even there are active vpn client connections?

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• Using VMWare Workstation, to convert a physical Win2008 into a templtae

  - by SndLt

  I'm new to VMware and despite having read the documentations, I'm having trouble. I'm using VMware workstation Stand-Alone package to turn a physical Win Server 2008 R2 into a usable VM appliance. The source and destination part is getting me here. It seems using keyword "localhost" doesn't cut all the way through. Does the shared folder have to be in my local drive for that matter? For ip, am I using the simple private IP that my nearest DHCP has given me? But what if I have more than one interfaces that have two or three different private ip addresses? Thanks.

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