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• Websites down EC2 inaccessible via SSH CPU utilisation 100% last few hours - what should I do?

  - by fuzzybee

  I have multiple websites hosted on 1 single EC2 instance. 1 website "abc" were down for a few hours, sometimes threw database connection error and sometimes just took too long to respond. 1 website "def" were incredibly slow but still up and running the rest of the websites had the same symptoms has "abc" I can afford 15 min or less down time for "def". Should I then (in AWS console) reboot my instance or create an AMI image from my instance and launch it and associate my elastic IP to the new instance or "launch more like this" Background on what may have happened to my ec2 The last time I made changes for 21 hours ago. A cronjob to create snapshots ran around 19 hours ago and it has been running for a long time. Google Analytics shows traffic to my websites such as kidlander.sg has been nothing exceptional. Is there any other actions I should take or better options I could have? (I have already contacted AWS support but their turnaround is 12 hours so I appreciate all the help I could get) Update I got everything back up and running and CPU utilisation back to normal, around 30%. There is 1 difference between "def" and "abc" as well as my other websites "def"'s database is hosted on RDS "abc"'s database is hosted on an EC2 instance (different from my web server instance) configured by myself Nevertheless, I checked the EC2 instance I'm using as MySQL server yesterday and it was absolutely fine during the incident low CPU ultilisation I could log in using linux command line

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• Why should one have a secondary DNS server?

  - by Sam Levin

  I'm very confused. I basically understand how DNS works. Here's an example that helps illustrate what I'm having trouble understanding. Right now, I run a small web-server. I use my provider's DNS manager, so I don't have a DNS server hosted on the machine. Let's say for a second, that I don't use my host's DNS, and I decide to set up a DNS server on my server. Hypothetical scenario: my server (entire) server goes down - DNS included. Why do I need backup DNS? If the server is down, who cares if the DNS server is down too, considering that even if I had DNS up (it wasn't on the crashed server), it wouldn't be able to forward requests anyway since the server would be down? Is the point of having secondary DNS, to be able to change the IP addresses that your DNS server points to, so if your webserver was down, you could redirect traffic to a backup? How would you switch to the secondary provider, in the event that your main DNS provider becomes unavailable? Is a backup DNS system basically up all the time? How is it configured? Is it just an exact clone of the DNS server you would have on your server? Do they run simultaneously? Hopefully someone can see what I'm hung up on, and provide some guidance. Thanks

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• Need Routing help (tagged/untagged)

  - by TheCleaner

  I really need some help trying to figure some "basic" routing. My brain is fried from being sick for a week and I'm not thinking clearly. Picture below describes my "setup". I'm trying to accomplish routing a user from their workstation to the Juniper SSG520 and then "OUT" through the internet connection. I can't move the connection as it is physically located where the user's switch is. Here's what I CAN do at this point: I can ping from the Juniper SSG520 eth3/3 to 6x.xxx.253.116 from 6x.xxx.253.114 I can ping from the x450 in the top right to 6x.xxx.253.112 from 6x.xxx.253.116 What I CANNOT DO: I cannot ping from the SSG520 eth3/3 to 6x.xxx.253.112 from 6x.xxx.253.114 (basically from the Juniper box to the gateway. I've tried changing port 1 in the x450 VLAN 666 as tagged but when I do that then I can't even ping from the Juniper SSG520 eth3/3 to the VLAN on the x450 (6x.xxx.253.116). I need to route traffic out the eth3/3 interface on the SSG520 THROUGH the 2 x450 Switches and out the internet connection. The caveat is that the 2 x450 switches are connected via fiber over distance and have tagged VLANs in them for the routing. Thoughts? http://img251.imageshack.us/img251/7752/drawing1.jpg

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• How have multiple web servers and IPs on the same physical network

  - by jsigned

  I do web development out of a small office and need to have multiple physical and virtual servers that can be accessed from the internet. I also have a number of devices (computers, laptops, tablets, printers, etc) that need connections as well. I have gotten a subnet of 8 IP's from my ISP and while that is adequate for the web servers its far too small for everything that needs access to the network. My router is an ASUS RT-N16 running DD-WRT. I'm just smart enough about this routing topic to be dangerous, think 2 year old with a magic marker. I would like to keep my internal network NAT'ed on the 192.168.x.x network and route the 68.69.x.x 255.255.255.248 traffic directly to the servers. The physical network consists of the 4 port DD-WRT router and an unmanaged gig switch. I have a fiber connection to the office that works as an Ethernet port. In other words I can plug my laptop directly into it and have access to the internet. There is no login or password and the router is setup to get DHCP from the ISP, and to provide DHCP addresses for the internal network. What I've done so far is google and try different configurations with little success. In the end I decided I didn't even know how to ask the questions needed. My questions are: Is this the best way to configure the network? How do you do it? VLANs? Multiple routers? I've never had to configure a router using anything more than the GUI so if this is command line stuff be gentle.

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• What is Best storage servers infrastructure ? DAS/NAS/SAN or installing GlusterFS/LUSTER/HDFS/RBDB

  - by TORr0t

  I am trying to design an infrastucture for the project I am working on. It would be somehow a file-sharing/downloading project (like rapidshare) and I would need high storage sizes and good scability, and I would add new storage nodes after my project grows up. I have come up with 3 solutions for my project which are using Luster, GlusterFS, HDFS, RDBD. For start, i would have 2 servers, one server is for glusterfs client + webserver + db server+ a streaming server, and the other server is gluster storage node. (After sometime, i would be adding more node servers, and client servers (dont know how many new client new servers to add, will see later) So, i am thinking to work with glusterfs. But i really wonder that if i have to use high performance servers with high sotrage sizes or avarage/slow servers with high storage sizes? Or nas/das/san solutions are better for glusterfs storage nodes? I might buy a nas and install glusterfs onto it. I would be happy to listen to your recommendations for the server properties (for each clients and nodes) . I really dont know if I really need high amount of ram and good cpus to for the nodes. I am sure i need it for client servers. The files would be streamed as well, so the Automatic file replication is important, thus, my system should work like a cloud, when needed, according to high traffic, the storage nodes should copy the most demanded file to be streamed and would help me to get rid of scability problems and my visitors would able to stream/download those files. Also, i am open to your experiences/thoughts about any good solution. Luster, hdfs, rbdb are the other options and i would be happy to listen to your thoughts here. I would be very very happy to hear back from anyone commented of any words I have used here. Thanks

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• Nginx + PHP5-FPM repeated cut outs 502

  - by James

  I've seen a number of questions here that highlight random 502 (Nginx + PHP-FPM = "Random" 502 Bad Gateway) and similar time outs when using Nginx + PHP-FPM. Even with all the questions, I'm still unable to find a solution. Using Ubuntu 10.10 + Nginx + PHP5-FPM + APC and every 1 out of 4 requests ends in a timeout and failure. This isn't a load issue or large traffic, it happens even in dev environment with one person. I am doing this across 3 1GB machines, each with the same configurations and same problems. fastcgi_params fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version; fastcgi_param REMOTE_ADDR $remote_addr; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name; fastcgi_param REDIRECT_STATUS 200; /etc/php5/fpm/main.conf ; FPM Configuration ; ;include=/etc/php5/fpm/*.conf ; Global Options ; pid = /var/run/php5-fpm.pid error_log = /var/log/php5-fpm.log ;log_level = notice ;emergency_restart_threshold = 0 ;emergency_restart_interval = 0 ;process_control_timeout = 0 ;daemonize = yes ; Pool Definitions ; include=/etc/php5/fpm/pool.d/*.conf /etc/php5/fpm/pool.d/www.conf [www] listen = 127.0.0.1:9000 ;listen.backlog = -1 ;listen.allowed_clients = 127.0.0.1 ;listen.owner = www-data ;listen.group = www-data ;listen.mode = 0666 user = www-data group = www-data ;pm.max_children = 50 pm.max_children = 15 ;pm.start_servers = 20 pm.min_spare_servers = 5 ;pm.max_spare_servers = 35 pm.max_spare_servers = 10 ;pm.max_requests = 500 ;pm.status_path = /status ;ping.path = /ping ;ping.response = pong request_terminate_timeout = 30 ;request_slowlog_timeout = 0 ;slowlog = /var/log/php-fpm.log.slow ;rlimit_files = 1024 ;rlimit_core = 0 ;chroot = chdir = /var/www ;catch_workers_output = yes

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• NETKEY IPsec and ARP

  - by Shawn J. Goff

  I'm wondering if I have the correct routing setup for an IPsec tunnel. I have control over the IPsec endpoints and the hosts connected to one side. These hosts are connecting to the tunnel so that they have access to the network on the other side of what I will call the IPsec server. I don't have control of the network upstream of this server. Normally, the IPsec server will not respond to ARP requests for the hosts on the other side of the tunnel. So when a packet arrives for one of my hosts the server gets ARP requests, but the upstream router gets no response, and cannot construct the ethernet frame to send me the packets. If I was using one of the swan stacks, I would have a separate interface, and I'd probably just need to turn on proxyarp, but I'm using NETKEY, which doesn't use a separate interface for the tunnel. To solve the problem for now, I have added an eth0.5 vlan to the IPsec server, turned on proxyarp for that interface, and added all routes my hosts addresses to that interface so that it will respond to those ARP requests (and will therefore get relevant packets routed to it). This works, but it feels wrong. What is the correct way to get the upstream router to send me the traffic for these hosts?

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• What are the attack vectors for passwords sent over http?

  - by KevinM

  I am trying to convince a customer to pay for SSL for a web site that requires login. I want to make sure I correctly understand the major scenarios in which someone can see the passwords that are being sent. My understanding is that at any of the hops along the way can use a packet analyzer to view what is being sent. This seems to require that any hacker (or their malware/botnet) be on the same subnet as any of the hops the packet takes to arrive at its destination. Is that right? Assuming some flavor of this subnet requirement holds true, do I need to worry about all the hops or just the first one? The first one I can obviously worry about if they're on a public Wifi network since anyone could be listening in. Should I be worried about what's going on in subnets that packets will travel across outside this? I don't know a ton about network traffic, but I would assume it's flowing through data centers of major carriers and there's not a lot of juicy attack vectors there, but please correct me if I am wrong. Are there other vectors to be worried about outside of someone listening with a packet analyzer? I am a networking and security noob, so please feel free to set me straight if I am using the wrong terminology in any of this.

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• Web filtering (Proxy or DNS) with option for users to ignore the block

  - by Jon Rhoades

  We are struggling with our users visiting infected or "attack" sites and Phising in general. Most of our machines are protected by an Enterprise anti virus and monitoring solution (McAffe ePO) and we try to get people to use Firefox... But no AV is perfect and we have to endure personal machines as well (albeit on their own 'Plague' VLANs) and would like to do something about Phishing as our users seem intent on disclosing their passwords to the world... To complicate matters we don't want to implement a block for many many reasons instead we would like to implement something akin to Firefox's "Reported Scam/Phish/Attack Site" - "Get me out of here" or crucially "Let me in anyway", giving the user a choice to still infect themselves if they feel like it (or look at a site incorrectly blacklisted). The reason we can't just use Firefox is we have a core enterprise App only certified on IE6&7 - thank you Oracle. Is it possible to implement this type of advisory filtering either using a proxy (in our case Squid) or DNS? http://serverfault.com/questions/15801/what-free-options-are-available-for-web-content-filtering http://serverfault.com/questions/47520/open-source-filtering-of-https-traffic Were a good start, but they don't address the advisory aspect of the filtering.

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• Network Load Balancing, intermittent port problem

  - by Jimmy Chandra

  Trying to troubleshoot an intermittent problem. I think it might be related to an NLB issue. We are using Windows Network Load Balancing to balance load for our multiserver SharePoint front ends. Say... Web Front End 1 IP is 192.168.1.100 and Web Front End 2 IP is 192.168.1.101, the NLB is setup to load balance both WFE servers on any incoming traffic to the IP 192.168.1.200. Sometimes we got an intermittent issue where when we try to access the SharePoint site using 192.168.1.200:8080 (say the site is set up to run on port 8080) from a remote client, it will display page not found. Pinging the 192.168.1.200 will give responses, but when trying to telnet to 192.168.1.200:8080 it just won't connect. However, browsing the SharePoint site directly on individual WFE (192.168.1.100 and 192.168.1.101) show no problem whatsoever. My guess also (we didn't get a chance to try it yet, but I think it should work), if I try connecting remotely to individual server, it will respond just fine. But any attempt on trying to connect using the virtual IP (192.168.1.200) will fail miserably. Funny thing is, after a while it will return back to normal. Anyone had similar experience with this type of problem while implementing NLB before? We are doing this in a virtual environment.

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• Apache mod_proxy with SSL not redirecting

  - by simonszu

  I have a custom server running behind an apache reverse proxy. Since the custom server can only handle HTTP traffic, i am trying to use apache for wrapping proper SSL around it, and for some kind of HTTP authentication. So i enabled mod_proxy and mod_ssl and modified sites-available/default-ssl. The config is as following: <Location /server> order deny,allow allow from all AuthType Basic AuthName "Please log in" AuthUserFile /etc/apache2/htpasswd Require valid-user ProxyPass http://192.168.1.102:8181/server ProxyPassReverse http://192.168.1.102:8181/server </Location> The custom server is accessible from the internal network via the location specified in the ProxyPass directive. However, when the proxy is accessed from the outside, it presents the login prompt, and after successfully authenticated, i get a blank page with the words The resource can be found at http://192.168.1.102:8181/server. When i type the external URL again in an already authenticated browser instance, i am properly redirected to the server frontend. The access.log is full of entrys stating that my browser does successful GET requests, and the proxy is happily serving the /server ressource. However, the ressource isn't containing the server's frontend, but this blank page with these words on it.

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• Routing for Two Hosts Behind a IPSec Tunnel

  - by Brent

  Network A 10.110.15.0/24 Firewall is .1 Host A is .2 Network B 10.110.16.0/24 Firewall is .1 Host B is .2 Two Cisco ASA's. IPSec tunnel with a crypo map that secures 10.110.15.0/24 <- 10.110.16.0/24. Let's say two hosts, 10.110.15.2 and 10.110.16.2 need to talk to each other. Normally I have to enter a persistent static route on a each host along the lines of: route add 10.110.16.0 mask 255.255.255.0 10.110.15.1 metric 1 -p (on the "A" box) I also have to enter another persistent static route on the .16 host in order for the traffic to know how to get back to the .15 network. Note that the default for each machine IS the firewall, so .1. I have no problem adding persistent routes on Windows/ESX/*nux machines but what about a smart switch in the .16 network that I want to manage from the .15 network. Do I need to run a routing protocol? Do I need to have Reverse Route Injection enabled on both ends of the IPSec tunnel? Should I add a route on the firewall? If so, how do you formulate it? Does it get a metric of 1 and my default route 0.0.0.0 get a metric of 2?

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• Apache ProxyPass with SSL

  - by BBonifield

  I have a QA setup that consists of multiple internal development servers and one world-accessible provisioning machine that is setup to proxy pass the web traffic. Everything works fine for non-SSL requests, but I'm having a hard time getting the SSL logic working as well. Here's a few example vhost blocks. <VirtualHost 192.168.168.101:443> ProxyPreserveHost On SSLProxyEngine On ProxyPass / https://192.168.168.111/ ServerName dev1.site.com </VirtualHost> <VirtualHost 192.168.168.101:80> ProxyPreserveHost On ProxyPass / http://192.168.168.111/ ServerName dev1.site.com </VirtualHost> <VirtualHost 192.168.168.101:443> ProxyPreserveHost On SSLProxyEngine On ProxyPass / https://192.168.168.111/ ServerName dev2.site.com </VirtualHost> <VirtualHost 192.168.168.101:80> ProxyPreserveHost On ProxyPass / http://192.168.168.111/ ServerName dev2.site.com </VirtualHost> I end up seeing the following error in the provisioner's error log. [Fri Jan 28 12:50:59 2011] [warn] [client 1.2.3.4] proxy: no HTTP 0.9 request (with no host line) on incoming request and preserve host set forcing hostname to be dev1.site.com for uri / As well as the following entry in the destination QA machine's access log. 192.168.168.101 - - [22/Feb/2011:08:34:56 -0600] "\x16\x03\x01 / HTTP/1.1" 301 326 "-" "-"

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• I am under DDoS. What can I do?

  - by Falcon Momot

  This is a Canonical Question about DoS and DDoS mitigation. I found a massive traffic spike on a website that I host today; I am getting thousands of connections a second and I see I'm using all 100Mbps of my available bandwidth. Nobody can access my site because all the requests time out, and I can't even log into the server because SSH times out too! This has happened a couple times before, and each time it's lasted a couple hours and gone away on its own. Occasionally, my website has another distinct but related problem: my server's load average (which is usually around .25) rockets up to 20 or more and nobody can access my site just the same as the other case. It also goes away after a few hours. Restarting my server doesn't help; what can I do to make my site accessible again, and what is happening? Relatedly, I found once that for a day or two, every time I started my service, it got a connection from a particular IP address and then crashed. As soon as I started it up again, this happened again and it crashed again. How is that similar, and what can I do about it?

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• vmware - ACE, Workstation - how to manage remoe clients??

  - by tom smith

  Hi. Exploring Vmware products/services and have a few questions. As I understand VM, you can use VMWare Workstation to create a VM of a target machine/box/OS. Let's call this VM, "foo". If I have 100 client PCs in my dept, and I want to install the VM (foo) on each client, and also manage the remote VM instances of (foo). How can I accompish this? Let's assume that the client machines are running Windows7, and have the vmplayer app installed on the box. I'm looking to do the following kinds of actions regarding the remote client machines: -Update the foo VM/image with new updated copies -Make sure that every VM "foo" has the same user, but a unique passwd -Monitor the traffic/status of each client VM "foo" oin each client -Start/Stop each client VN "foo" from the master console -Etc... Can this be accomplished? How would I do it, what services/products would I need? I've tried toalking to a few of the pre-sales guys in VMWare, and got nowhere, other than telling me to email my questions!! Looking at google shed more insight, but I still have questions. So, if you have detailed VMWare understanding, pointers to consultants, or resellers who can help, all pointers are greatly appreciated. Thanks -tom

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• Fresh Proxmox VE 2.1 installation with defaults can't be reached or pinged

  - by Damainman

  I am using the lastest Proxmox VE 2.1. My server has two NICS with a uplink only connected into eth0. My Server is a co-located server utilizing public IPv4 IPs. It is not behind a firewall or any system which monitors traffic. Via IPKVM I did a fresh install of Proxmox, I put in the correct IP, Mask, Gateway, and DNS information. The install went perfectly fine with no errors. Upon completion and rebooting the system: I am unable to reach the web GUI via the browser, it just times out. I am unable to ping the server. I am unable to ping outside to the Internet from within the server. Tried pinging out to 4.2.2.2 and yahoo.com I tried rebooting the server and restarting the network service. IFCONFIG shows my IP information under vmbro0 which also has the same MAC address as the eth0 device. eth0 only displays a IPv6 Scope:Link address, which I did not setup myself. This is my first time installing proxmox, but after searching for a few hours it doesn't seem like anyone else is having the same issue as me from a fresh install with just the defaults. So far the only thing I did was install it. Also, I know the network cable is good and the IP is good because I was running a Xen XCP server with the same network settings prior to wiping it to install proxmox. Some additional information: for pveversion -v (Installed proxmox-ve_2.1-f9b0f63a-26.iso) pve-manager: 2.1-1 (pve-manager/2.1/f9b0f63a) running kernel: 2.6.32-11-pve proxmox-ve-2.6.32: 2.0-66 netstat -nr (note: .136 is my network, and .137 is my gateway) Destination - Gateway - Genmask xxx.xxx.xxx.136 - 0.0.0.0 - 255.255.255.248 0.0.0.0 - xxx.xxx.xxx.137 - 0.0.0.0 /etc/network/interfaces auto lo iface lo inet loopback auto vmbr0 iface vmbr0 inet static address xxx.xxx.xxx.138 netmask 255.255.255.248 gateway xxx.xxx.xxx.137 bridge_ports eth0 bridge_stp off bridge_fd 0

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• Use one NIC to create multiple interfaces for Linux KVM

  - by Phanto

  I am working on a thesis research project, and I am having some difficulty figuring out how to make one NIC spawn several "bridge" interfaces such that each KVM VM can be seen on the local network. I am very new to KVM, and am still exploring what it can do. Below is the scenario that I am attempting to make (on a CentOS/RHEL 6 system): Linux KVM Host has 1 NIC (eth0) connected to a switch. Create multiple "bridge" or equivalent interfaces that are spawned off of eth0 that would provide a unique IP for each VM. This is so that each VM can communicate with other hosts on the network, and that other hosts on the network can communicate with the VM. IMPORTANT: I would like iptables on the KVM host to be able to manipulate/control/restrict the traffic that would be sent on those "bridge" interfaces. I would like to create a minimum of three VM's, each using their own unique "bridge" interfaces. I have previously made a br0 interface off of eth0, but unfortunately, I am unable to add any more to it. It appears that you can only bridge 1 interface to the NIC. I would like to bridge many to one. Would a tap device be able to do this? If so, how would it be set up? Effectively, I am attempting to replicate what can easily be created with VirtualBox on Windows, where each VM is given a "bridged" interface, and can live on the network. I want to achieve this very same thing with Linux KVM. Thank You EDIT: To be more descriptive, I want to achieve something that looks like this: This can be found on this page: http://en.gentoo-wiki.com/wiki/KVM#Networking_2 HOST +---------------+ | | KVM GUEST1 | | +--------------+ | +------+ | | | LAN ---+--- eth0 | +--+---+---- nic0 | KVM GUEST2 | | tap0----+ | |192.168.1.13 | +--------------+ | | tap1----+ | +--------------+ | | | +------+ | | | | | br0 +--+----------------------+---- nic0 | |192.168.1.12 | |192.168.1.14 | +---------------+ +--------------+

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• ASA Slow IPSec Performance with Inconsistent Window Size

  - by Brent

  I have a IPSec link between two sites over ASA 5520s running 8.4(3) and I am getting extremely poor performance when traffic passes over the IPSec VPN. CPU on the devices is ~13%, Memory at 408 MB, and active VPN sessions 2. The load on both of the the devices is particularly low. Latency between the two sites is ~40ms. Screenshot of wireshark file transfer between the two hosts over the firewall IPSec VPN performing at 10MBPS. Note the changing window size. http://imgur.com/wGTB8Cr Screenshot of wireshark file transfer between the two hosts over the firewall not going over IPSec performing at 55MBPS. Constant window size. http://imgur.com/EU23W1e I'm showing an inconsistent window size when transferring over the IPSec VPN ranging in 46,796 to 65535. When performing at 55+MBPS, the window size is consistently 65,535. Does this show a problem in my configuration of the IPSec VPN in the ASA or a Layer1/2 issue? Using ping xxxxxx -f -l I finally get a non-fragment at 1418 bytes so 1418+28 for IP/ICMP headers = 1446. I know that I have 1500 set on the ASA and Ethernet. I do have "Force Maximum segment size for TCP proxy connection to be" "1380" bytes set under Configuration Advanced TCP Options on the ASA. Using IPERF, I am getting a "TCP Window Full" every few seconds and ~3 MBPS performance. http://imgur.com/elRlMpY Show Run on the ASA http://pastebin.com/uKM4Jh76 Show cry accelerator stats http://pastebin.com/xQahnqK3

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• CryptSvc not matched by Windows 7 Firewall rule

  - by theultramage

  I am using Windows Firewall in conjunction with a third-party tool to get notified about new outbound connection attempts (Windows Firewall Notifier or Windows Firewall Control). The way these tools do it is by setting the firewall to deny by default, and to add an auditing policy to log blocked connections into the Security event log. Then they watch the log, and display notification about newly added entries. netsh advfirewall set allprofiles firewallpolicy blockinbound,blockoutbound auditpol /set /subcategory:{0CCE9226-69AE-11D9-BED3-505054503030} /failure:enable With this configuration in place, I now need to craft outbound allow rules for applications and system services. Here is the rule for CryptSvc, the service frequently used for certificate validation and revocation checking: netsh advfirewall firewall add rule name="Windows Cryptographic Services" action=allow enable=yes profile=any program="%SystemRoot%\system32\svchost.exe" service="CryptSvc" dir=out protocol=tcp remoteport=80,443 The problem is, this rule does not work. Unless I change the scope to "all programs and services" (which is really unhealthy), connection denied events like the following will keep appearing in the security log: Event 5157, Microsoft Windows security auditing. The Windows Filtering Platform has blocked a connection. Application Information: Process ID: 1476 (<- svchost.exe with CryptSvc and nothing else) Application Name: \device\harddiskvolume1\windows\system32\svchost.exe Network Information: Direction: Outbound Source Address: 192.168.0.1 Source Port: 49616 Destination Address: 2.16.52.16 Destination Port: 80 Protocol: 6 (<- TCP) To make sure it's CryptSvc, I have let the connection through and reviewed its traffic; I also configured CryptSvc to run in its own svchost instance to make it more obvious: ;sc config CryptSvc type= share sc config CryptSvc type= own So... why is it not matching the firewall rule, and how to fix that?

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• Multiple Set Peer for VPN Failover

  - by Kyle Brandt

  I will have two Cisco routers at Location A serving the same internal networks, and one router in location B. Currently, I have one router in each location with a IPSec site-to-site tunnel connecting them. It looks something like: Location A: crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location B set peer 12.12.12.12 set transform-set ESP-3DES-SHA match address internal-ips Location B: crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location A set peer 11.11.11.11 set transform-set ESP-3DES-SHA match address internal-ips Can I achieve fail over by simply adding another set peer at location B?: Location A (New secondary Router, configuration on previous router stays the same): crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location B set peer 12.12.12.12 set transform-set ESP-3DES-SHA match address internal-ips Location B (Configuration Changed): crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location A set peer 11.11.11.11 ! 11.11.11.100 is the ip of the new second router at location A set peer 11.11.11.100 set transform-set ESP-3DES-SHA match address internal-ips Cisco Says: For crypto map entries created with the crypto map map-name seq-num ipsec-isakmp command, you can specify multiple peers by repeating this command. The peer that packets are actually sent to is determined by the last peer that the router heard from (received either traffic or a negotiation request from) for a given data flow. If the attempt fails with the first peer, Internet Key Exchange (IKE) tries the next peer on the crypto map list. But I don't fully understand that in the context of a failover scenerio (One of the routers as Location A blowing up).

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• Apache Process question about RAM usage

  - by Andrew Fashion

  So everytime I load a new page, I notice a new HTTPD process opens, every time I click a page, and each process says it's using anywhere from 2-4.5% of memory. Does that mean every single process is running at that time using 2-4% of RAM? It's a brand new server and I'm the only one on the server at the moment. Or does it mean all the other processes are dying, and only the new one is active. Because 4% of my 2048MB of RAM is already 82MB for just one process!?!? Let me know, because I am trying to determine what I need to beef my server up in order to handle high loads of traffic. I'm expect to get 20,000 uniques per day on launch. I am currently running a Dual Quad Xeon server, with only 2GB of ram, I will upgrade to 8GB or more shortly. Let me know what you suggest! thank you [root@D18634 log]# top | grep 'httpd' 11315 apache 15 0 362m 82m 24m R 12.3 4.1 0:03.00 httpd 11310 apache 16 0 322m 41m 21m S 5.7 2.1 0:02.98 httpd 11315 apache 15 0 362m 83m 25m S 24.3 4.1 0:03.73 httpd 11319 apache 16 0 324m 42m 20m R 1.0 2.1 0:01.85 httpd 11319 apache 16 0 362m 82m 23m R 78.5 4.1 0:04.21 httpd 11321 apache 16 0 323m 44m 23m S 35.3 2.2 0:04.13 httpd 11319 apache 15 0 361m 82m 23m S 8.3 4.1 0:04.46 httpd 11321 apache 15 0 323m 44m 23m S 35.9 2.2 0:05.21 httpd 11313 apache 15 0 324m 41m 19m S 48.6 2.1 0:03.23 httpd 11322 apache 16 0 354m 72m 20m R 11.0 3.6 0:05.11 httpd 11322 apache 16 0 354m 72m 20m S 23.9 3.6 0:05.83 httpd 11314 apache 16 0 355m 75m 22m R 18.3 3.7 0:04.64 httpd

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• How to set up that specific domains are tunneled to another server

  - by Peter Smit

  I am working at an university as research assistant. Often I would like to connect from home to university resources over http or ssh, but they are blocked from outside access. Therefore, they have a front-end ssh server where we can ssh into and from there to other hosts. For http access they advise to set up an ssh tunnel like this ssh -L 1234:proxyserver.university.fi:8080 publicsshserver.university.fi and put the proxy settings of your browser to point to port 1234 All nice and working, but I would not like to let all my other internet traffic go over this proxy server, and everytime I want to connect to the university I have to do this steps again. What would I like: - Set up a ssh tunnel everytime I log in my computer. I have a certificate, so no passwords are needed - Have a way to redirect some wildcard-domains always through the ssh-server first. So that when I type intra.university.fi in my browser, transparently the request is going through the tunnel. Same when I want to ssh into another resource within the university Is this possible? For the http part I think I maybe should set up my own local transparent proxy to have this easily done. How about the ssh part?

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• Sonicwall TZ210 - Set up public wifi on separate subnet & interface

  - by thomasjbarrett

  I want to set up a public wifi by connecting another router to the X6 interface, and put it on a separate subnet (192.168.10.0/24) & in the DMZ Zone to keep it away from the regular LAN. I believe I have the network settings correct: the router has acquired the IP and DNS information from the TZ210, and the TZ210 shows it as an active DHCP lease. X6 is in the DMZ. I now have a routing/NAT/firewall problem, since I can't get any traffic to travel from the subnet to the internet. I can't get to any external websites and can't ping the TZ210 from the subnet. X0 is the regular LAN, and X1 is the WAN. Looking for any tips or tutorials on this. Here's my current relevant rules: Routing Source: X6 Subnet Destination: Any Service: Any Gateway: Default Gateway Interface: X6 Source: Any Destination: X6 Subnet Service: Any Gateway: 0.0.0.0 Interface: X6 NAT Policies Source Original: Any Translated: WAN IP Destination Original: Any Translated: Original Inbound: X6 Outbound: X1 Source Original: Any Translated: U0 IP Destination Original: Any Translated: Original Inbound: X6 Outbound: U0 Firewall DMZ LAN : Deny All DMZ WAN : Allow All LAN DMZ : Allow All WAN DMZ : Allow All

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• Using radvd to advertise ipv6 over VPN connection using DD-wrt

  - by Sean Madden

  My ultimate goal is to allow VPN users to have access to my internal IPv6 network from across the intertubes. I've got a linksys WRT54GSv2 running DD-WRTv24SP1 and have configured the little guy as specified here http://www.dd-wrt.com/wiki/index.php/IPv6 and it works wonderfully over the br0 interface (LAN/WLAN bridge). Here's the issue though, when I add an additional interface to the radvd config file on the router (specifically ppp0, for the VPN traffic), radvd refuses to start. The kicker is that on DDWRT, it doesn't give an error message, it just fails outright. Any suggestions on where to proceed from here? /jffs/radvd.conf: interface br0 { AdvSendAdvert on; prefix 0:0:0:1::/64 { AdvOnLink on; AdvAutonomous on; }; }; interface ppp0 { AdvSendAdvert on; prefix 0:0:0:1::/64 { AdvOnLink on; AdvAutonomous on; }; }; The documentation I've found for radvd is slim, but if anyone has a decent idea on how to proceed I'd love to hear it.

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• IIS doesn't serve certain file extensions

  - by Alekc

  Hi, i have this weird issue on Win 2k3 server and IIS: Iis has several sites, in one of them i need to create a subdir and set up it as web application. I've noticed that if i create new directory and put some .js/.txt file into it, they will not be served by iis (IE gives an error Internet Explorer cannot display the webpage). If i put the same files in another old site's subdirectory it will show correctly. By sniffing traffic i've seen that iis reply connection state 200 and then drop completely any connection http://domain.com/test2/prova.txt GET /test2/prova.txt HTTP/1.1 Host: domain.com User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729) Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Connection: keep-alive HTTP/1.x 200 OK If i rename file prova.txt in prova.asp for example it showing without problems so it shouldn't be permissions issue. After making some researches I've found out that it can be caused by missing mime types, I've checked out .txt and .js are present and served by aspnet_isapi.dll. And here comes another weird thing: if i remove mime mapping from directory's properties it's served correctly, but the same thing doesn't work with js. I'm really beginning to be out of ideas, is there someone who have some hint? Thanks in advance.

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