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  • iptables management tools for large scale environment

    - by womble
    The environment I'm operating in is a large-scale web hosting operation (several hundred servers under management, almost-all-public addressing, etc -- so anything that talks about managing ADSL links is unlikely to work well), and we're looking for something that will be comfortable managing both the core ruleset (around 12,000 entries in iptables at current count) plus the host-based rulesets we manage for customers. Our core router ruleset changes a few times a day, and the host-based rulesets would change maybe 50 times a month (across all the servers, so maybe one change per five servers per month). We're currently using filtergen (which is balls in general, and super-balls at our scale of operation), and I've used shorewall in the past at other jobs (which would be preferable to filtergen, but I figure there's got to be something out there that's better than that). The "musts" we've come up with for any replacement system are: Must generate a ruleset fairly quickly (a filtergen run on our ruleset takes 15-20 minutes; this is just insane) -- this is related to the next point: Must generate an iptables-restore style file and load that in one hit, not call iptables for every rule insert Must not take down the firewall for an extended period while the ruleset reloads (again, this is a consequence of the above point) Must support IPv6 (we aren't deploying anything new that isn't IPv6 compatible) Must be DFSG-free Must use plain-text configuration files (as we run everything through revision control, and using standard Unix text-manipulation tools are our SOP) Must support both RedHat and Debian (packaged preferred, but at the very least mustn't be overtly hostile to either distro's standards) Must support the ability to run arbitrary iptables commands to support features that aren't part of the system's "native language" Anything that doesn't meet all these criteria will not be considered. The following are our "nice to haves": Should support config file "fragments" (that is, you can drop a pile of files in a directory and say to the firewall "include everything in this directory in the ruleset"; we use configuration management extensively and would like to use this feature to provide service-specific rules automatically) Should support raw tables Should allow you to specify particular ICMP in both incoming packets and REJECT rules Should gracefully support hostnames that resolve to more than one IP address (we've been caught by this one a few times with filtergen; it's a rather royal pain in the butt) The more optional/weird iptables features that the tool supports (either natively or via existing or easily-writable plugins) the better. We use strange features of iptables now and then, and the more of those that "just work", the better for everyone.

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  • vmware windows7 professional changing ip addresses

    - by chris hough
    is there a way to fix your windows 7 professional guest host os ipaddress so it does not change every time you startup? I am currently using NAT for networking and would like to remain using this networking method if possible. In older versions of windows this never used to be a problem in vmware so I am wondering if I am missing a setting in windows 7 professional or in vmware. thank you for your help, chris

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  • Writing a powershell script to copy files with certain extension from one folder to another

    - by the_drow
    I would like to write a powershell script that gets the following parameters as input: Folder to copy from, extensions allows, folder to copy to and a boolean indicating if the change should restart IIS, username and password. What cmdlets should I be looking at considering that I am copying to a remote server? How do I read the parameters into variables? How do I restart IIS? Cosidering that I might want to copy multiple folders, how do I write a powershell script that invokes a powershell script?

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  • faking NAT with a VMware distributed switch across multiple hosts

    - by romant
    Have a VM that will act as the router, and will be connected to both networks (NAT + 'real'). I spread the distributed switch across the hosts, although any VM that is not on the same physical host as the router/dhcpd simply doesn't get an IP. So its obviously my dvSwitch config. Has anyone achieved a NAT solution using a dvSwitch before that they could share?! Thanks.

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  • How to deploy Java Web Application in Hostgator?

    - by Mujahid
    I have a Java Web application and I have a VPS hosting bought from Hostgator in which recently the tomcat has been installed. But I couldn't find a way to deploy my application and I talked with more than 3 Hostgator technical agents and none of them know how to deploy the Java application in tomcat in Hostgator server and they say they don't give support for hosting Java application. Does anyone have deployed any Java application in hostgator server? If you know please help me to host my application.

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  • Apache server randomly stopped working yesterday. How can I fix it?

    - by Clueless
    I use Apache version 2.2.11 through WampServer to host a website. Every time during the last week I tried to connect to localhost it went through and everything was fine. Now all of a sudden I get errors. I didn't change the configuration or anything as far as I know, it just stopped working for no apparent reason. As I said before, it's been working fine. Any way I can get it back up and working again?

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  • What user is the script run as after Carbon Copy Cloner ends scheduled task?

    - by Paolo
    On Mac OS X I keep data on a local server mirrored with the same data on a remote server with a scheduled backup task done with Carbon Copy Cloner. After the backup is done a bash script is run as specified in the scheduled task options of CCC. Is the script run as root? Or differently and more generally: as my script writes to a log file, what command should I put on my script to see on the log if the script is running as root or something else?

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  • Windows Server 2008 Stnd - Wins Issue Possibly???

    - by DevNULL
    Currently we have a freshly setup Windows Server 2008 server acting as DNS and AD,Print and File server. I setup VPN and routing services and was able to successfully connect through VPN however I can't resolve any host using NETBios names. Only IP addresses. Sounds like I need to add a role for WINS but since this is a LIVE environment I'm a little hesitant about adding and removing additions to the box. What would I need to do to resolve this issue?

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  • No Connectivity to ESX guests on one server

    - by Sam Cogan
    I have a number of ESX servers hosting VM's, all but one of these works ok, however one server has a problem where any guests on not contactable over the network. The ESX hosts is contactable, is integrated int VCenter, and you can even live migrate VM's to and from this server, but any VM's on that server are unable to talk to the rest of the network. The VM's NIC is shown as Up and has the right IP configuration, and as soon as you move it back to another host it works fine.

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  • Using wget to save sequential files as well as renaming the file extension

    - by Ian
    I run a cron job that requests a snapshot from a remote webcam at a local address: wget http://user:[email protected]/snapshot.cgi This creates the files snapshot.cgi, snapshot.cgi.1, snapshot.cgi.2, each time it's run. My desired result would be for the file to be named similar to file.1.jpg, file.2.jpg. Basically, sequentially or date/time named files with the correct file extension instead of .cgi. Any ideas?

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  • How to configure SNI so as to have benifits of SNI

    - by cd
    Hi, How can i configure SNI to get the benifts ...........I am using openssl 1.0.0 beta5 and apache 2.2.14. Can anyone tell me the complete procedure . I am configuring virtual host in ssl.conf files and having diff certs to each site hosted on apache. Need help its urgent

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  • Mass bulk add domains to web hosting service (possible?)

    - by Scott
    I was wondering if anyone does bulk adding of domains to your web hosting provider (Amazon, Linode, Rackspace, etc). I am thinking of creating a product that allows user to host their site on top of my web hosting and want something that can allow me to bulk add domains (and point DNS to my web hosting DNS) with as little manual work as possible. I am thinking of getting a VPS to do this. Is this possible even? Thanks Scott

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  • sbs 2001 essentials rdp cert install package

    - by Crash893
    Im using Microsoft SBS 2011 esentials to allow some of my users to remote into there work machines when they try they get and error that says that the rd gateway can not be trusted I looked up the error on google and confirmed that i need to install the ssl cert on the local machine but the instructions given are for sbs 2011 standard (website here ) but the path given is not in sbs essentials so where can i find the " Install Certificate Package.zip " file in essentials?

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  • Upgrade from Etch to Lenny, server no longer reboots

    - by Jack
    Hi, I just upgraded my (remote) webserver to Lenny from Etch. and no real issue occurs except that I cannot reboot that server. (I can only start in a rescue mode) I recall that a MBR change performed and I am wondering if that could be the reason for this failure. Would someone know how I can revert this MBR change ? I had switched back to my previous linux kernel, still cannot reboot. I would appreciate your help. thanks Jack

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  • Making to the DNS on two different VPNs play nice.

    - by NitroxDM
    Setup: I have two separate networks I need to connect to at the same time. VPN 1 PPTP IP : 192.168.2.0/24 DNS : 192.168.2.32; 192.168.2.34 (Windows 2003) Domain : old.com Forwarder : 192.168.2.1 (Gateway running DNS) DD-WRT VPN 2 OpenVPN using Routing -- I'm going to switch to bridging IP : 192.168.10.0/24 DNS : 192.168.10.10 (Windows 2008) Domain : xyz.dc Forwarder : 192.168.10.1 (Gateway running DNS) ClearOS When I'm connected I would like to resolve host names on both networks without fully qualifying them.

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  • Is there anyway way to speed up Exchange 2007's Load Generator tool?

    - by JohnM
    I'm running Load Generator to test our new deployment before going live and the initialization process has been running for two days and is only at 25% for ~58000 user test. Does anyone know of a way to speed up this process? Surely it shouldn't take this long. Currently, I've got it running with one master and two remote servers and they aren't peaking out on CPU or Network utilization. Any help you could provide would be greatly appreciated.

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  • Ubuntu with KVM guest VM and broken bridges

    - by MadPsy
    I have an Ubuntu box with a KVM guest VM running. They use bridging so the guest VM attaches to the physical network of its host. The guest VM has 2 NICs in 2 different bridges. First NIC of the VM is tap5 and is in bridge br0 br0 8000.46720f5c572e no eth0.500 tap5 Second NIC of the VM is tap2 and is in bridge br100 br100 8000.76ad2fc96661 no eth0.100 eth0.101 eth0.103 eth0.104 eth0.105 tap2 On the host, br0 has an IP and br100 does not 21: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP link/ether 46:72:0f:5c:57:2e brd ff:ff:ff:ff:ff:ff inet 192.168.100.4/24 brd 192.168.10.255 scope global br0 inet6 fe80::d6ae:52ff:febe:777/64 scope link valid_lft forever preferred_lft forever On the guest, its eth0 and eth1 interfaces both have IP addresses 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:3e:61:fb:7a:da brd ff:ff:ff:ff:ff:ff inet 192.168.100.6/24 brd 192.168.100.255 scope global eth0 inet6 fe80::23e:61ff:fefb:7ada/64 scope link valid_lft forever preferred_lft forever 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:3e:61:fb:7a:ea brd ff:ff:ff:ff:ff:ff inet 172.16.50.129/25 brd 172.16.50.255 scope global eth1 inet6 fe80::23e:61ff:fefb:7aea/64 scope link valid_lft forever preferred_lft forever On the guest VM, a tcpdump of its eth1 interface (tap2) shows traffic from its eth0 interface (tap5), as if the 2 bridges are themselves bridged. This means any interface on br100 is now bridged across to br0 - which is completely broken. root@chillispot:~# tcpdump -c 1 -n -v -i eth1 net 192.168.100.0/24 tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 16:31:24.175583 IP (tos 0x0, ttl 64, id 48054, offset 0, flags [DF], proto TCP (6), length 148) 192.168.100.6.22 > 192.168.100.4.59505: Flags [P.], cksum 0x6c2b (correct), seq 1056321648:1056321744, ack 398642983, win 1700, options [nop,nop,TS val 197473436 ecr 200655363], length 96 What could be bridging the 2 bridges, except the guest VM (which is a stock Ubuntu install)? I am at a complete loss! Thanks.

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  • How can I copy a Virtual Machine on VMWare ESXi 4 while maintaining Thin Provisioning?

    - by Billy ONeal
    We have an ESXi host we use for testing, which results in a ton of VMs being created and copied on a regular basis. We don't have the storage capacity to use thick provisioned VMs on this server, and have been maintaining the copies using VMWare Converter. But using the converter is an incredibly slow operation which copies the entire contents of the VM over the network several times before actually finishing the copy. Is there a way to simply clone the VM but maintain the thin-provisioning?

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  • Server 2008, 2 NICs, 2 fixed IPs - big delays using internet

    - by user46055
    Hi geniuses I have an all in one Windows 2008 server, configured with AD/DHCP/DNS/RRAS - all set up with wizards and no specific tweaking. The server has 2 network adapters : one of which ("MyWAN") is plugged into our office's internet connection, the other ("MyLAN") is plugged into a local switch, which is also where all our desktops are connected. So this one server is doing everything. When first set up, MyLAN had a fixed IP of 192.168.2.1 and served the desktops with DHCP scope 192.168.2.50-99. It also told them to use 192.168.2.1 as DNS and gateway. MyWAN was setup to take its IP etc from DHCP, being handled by the building's router and ADSL modem etc. All desktops were setup to use DHCP. This all worked perfectly fine, until I recently changed MyWAN to have a static IP (I wanted to access it from home, and needed to give it a static IP to port map in the building's router). Things still work, but there is now a long delay when accessing the internet. The actual speed is as before when downloading, but there is a pause of 3-6 secs when connecting to new hosts (for example if I browse to slashdot from either a desktop or the server itself, it'll hang on connecting to slashdot.org, hang again on connecting to *.fsdn, *.google-analytics.com and all the other hosts referenced from the main page). If I ping slashdot.org from the server, I get the following : Pinging slashdot.org [216.34.181.45] with 32 bytes of data: Reply from 192.168.2.1: Destination host unreachable. Reply from 216.34.181.45: bytes=32 time=99ms TTL=239 Reply from 216.34.181.45: bytes=32 time=100ms TTL=239 Reply from 216.34.181.45: bytes=32 time=101ms TTL=239 Pinging anywhere external always seems to hit 192.168.2.1 first, which doesn't seem right. Trying tracert from the server gives the following : Tracing route to slashdot.org [216.34.181.45] over a maximum of 30 hops: 1 MYSERVER01.intranet [192.168.2.1] reports: Destination host unreachable Trying tracert from a desktop gives the following : Tracing route to slashdot.org [216.34.181.45] over a maximum of 30 hops: 1 <1 ms * <1 ms MYSERVER [192.168.2.1] 2 * * * Request timed out. 3 6 ms 6 ms 6 ms dsl-gw1.ge.mer.uk.webtapestry.net [217.151.111.17] 4 38 ms 239 ms 251 ms gw-router.ge.mer.uk.webtapestry.net [217.151.111.13] ...and then all is fine after that. I think that DNS is working fine because the domain names are getting translated to correct IPs immediately. DHCP seems to be okay? So perhaps it's something up with my RRAS setup - although I can't see any option during the setup wizard which I would have filled in differently. I've also tried changing the binding order of the two network connections, to prioritise MyWAN, but that doesn't seem to have done anything. Any idea what's up? Many thanks - Rob

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