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• nginx config to serve as external secure proxy

  - by realworldcoder

  I'm setting up an external nginx server to proxy all outgoing traffic in order to simplify outbound firewall rules. What I'd like is: https://service1.com.example.com -- https://service1.com:443 https://www.service2.com.example.com -- https://www.service2.com:443 https://service3.com.example.com -- http://service3.com:8080 (everything else denied) (There will be 30-40 different hosts here, so I'm looking for something relatively easy to maintain.) Is this possible with Nginx? Or is there some other proxy software that is better suited for this problem?

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• secure synchronization of large amount of data

  - by goncalopp

  I need to automatically mirror a large amount (terabytes) of files in two unix machines over a slow link (1 Mbps). This needs to be done frequently, but the data doesn't change too much (delta transmission doesn't saturate the link). The usual solution would be rsync, but there's an additional requirement: it's undesirable, from a security standpoint, that either the source or destination machines have (keyless) ssh keys to each other, or any kind of filesystem access. All communication between the two machines should thus be initialized (and mediated) through a third machine. I've asked a separate question about rsync in particular here. Are there other obvious solutions I'm missing?

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• Looking for a SECURE Audio Player for Windows

  - by Avery Payne

  I know there are dozens of audio players for windows, but which one has: the best security record (least reported vulnerabilities) the least number of security exploits the best security implementation, along with the reasoning behind the implementaiton (i.e. how it is handled). As Windows users start to see more and more reports of media-based attacks against Windows Media Player (& co.) it would be useful to have a player that has some proactive security approaches to handling exploits.

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• Are Time Machine backups secure?

  - by Leandro Ardissone

  I have my Time Machine backups on an external disk (WD My Passport with no hardware encryption) and I'm worried if the data stored on the disk is safe in case somebody steals it and connect it to any Mac/PC. Does any Mac can browse the Time Machine backups? Or are they encrypted in any way? If no, is there a way to improve security of the backups, should I buy a hardware encryption based HD? Thanks.

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• Running multiple sites on a LAMP with secure isolation

  - by David C.

  Hi everybody, I have been administering a few LAMP servers with 2-5 sites on each of them. These are basically owned by the same user/client so there are no security issues except from attacks through vulnerable deamons or scripts. I am builing my own server and would like to start hosting multiple sites. My first concern is... ISOLATION. How can I avoid that a c99 script could deface all the virtual hosts? Also, should I prevent that c99 to be able to write/read the other sites' directories? (It is easy to "cat" a config.php from another site and then get into the mysql database) My server is a VPS with 512M burstable to 1G. Among the free hosting managers, is there any small one which works for my VPS? (which maybe is compatible with the security approach I would like to have) Currently I am not planning to host over 10 sites but I would not accept that a client/hacker could navigate into unwanted directories or, worse, run malicious scripts. FTP management would be fine. I don't want to complicate things with SSH isolation. What is the best practice in this case? Basically, what do hosting companies do to sleep well? :) Thanks very much! David

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• Connecting to a secure, graphical, x session using a stateless thin client

  - by npeterson

  I'm looking for an open source, non-proprietery solution to this problem, any help would be appreciated. I'd like to setup a server running Ubuntu Server. I'd then like to connect to this server from a stateless thin client and use an x-session. This would occur mostly over local area networks, but also possibly over the internet. What would be the ideal set of software to accomplish this from a security, and usability standpoint? Are there any ready-made stateless thin clients that don't require proprietery software?

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• How (in)secure are cell phones in reality?

  - by Aron Rotteveel

  I was recently re-reading an old Wired article about the Kaminsky DNS Vulnerability and the story behind it. In this article there was a quote that came across a little bit exaggerated to me: "The first thing I want to say to you," Vixie told Kaminsky, trying to contain the flood of feeling, "is never, ever repeat what you just told me over a cell phone." Vixie knew how easy it was to eavesdrop on a cell signal, and he had heard enough to know that he was facing a problem of global significance. If the information were intercepted by the wrong people, the wired world could be held ransom. Hackers could wreak havoc. Billions of dollars were at stake, and Vixie wasn't going to take any risks. When reading this I could not help but feel like it was a bit blown-up and theatrical. Now, I know absolutely nothing about cell phones and the security problems involved, but to my understanding, cell phone security has quite improved over the past few years. So my question is: how insecure are cell phones in reality? Are there any good articles that dig a bit deeper into this matter?

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• Internal+external interfaces with multiple default gateways on win2003

  - by fileitup

  Im trying to set up several web servers for a load balanced cluster and need to have each server connected to the internal network (for load balancing) as well as to an external network (internet - for administration). I have two NICs but since I cant set two default gateways I have the external gateway as default and the internal as a route rule. This setup only works half way - the internal network is fine but I cant log in from outside or see the web from the box. If I switch the gateways remote login/web will work, but the internal wont. Im sure someone encountered this before but wasnt able to find anything online. Any help will be appreciated.

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• How secure are third party Ubuntu (APT) repository mirrors

  - by bakytn

  Hello! We have locally an Ubuntu mirrors to save a lot of traffic (our external traffic is not free) So whenever I apt-get install "program" it gets from that repository. the question is...basically they can substitute any package with their own? So it's 100% on my own risk and I can be hacked easily on any apt-get upgrade or a-g install or a-g dist-upgrade? for example the very basic ones like "telnet" or any other.

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• How to secure a directory in Apache using a PHP session

  - by Cogsy

  I have a site that uses PHP session for authentication. There is one directory that I would like to restrict access to that does not use any PHP, it's just full of static content. I just don't know how to restrict access without every request going through a PHP script. Is there some way to have Apache check the session credentials and restrict access like Basic Auth?

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• Ubuntu server - Problem of routing

  - by Max

  Hi, I have setup a Ubuntu server with Ubuntu Enterprise Cloud. The server is connected to a private LAN with DHCP and Internet access (via a gateway). At first, the server was working fine. It can ping the internet. It can also ping other machine inside LAN. The problem happened after i let the machine idle for more than 1 hour. When I want to use the machine again, I can't ping the internet anymore. I can only ping the machine inside LAN. I try to ping the server from another machine and it's working. Then, i ssh into that server from another machine, and I found that I can ping the internet from that server. It seems that there are some problems in the routing table of this server. Can anyone help me on this? Thank you. Max

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• Secure data hosting...

  - by kylex

  I've looked online and can't seem to find a proper answer. We have a client that requires very sensitive data be stored in a database. Is there a hosting company that provides high-level database security (this is for a bank).

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• Bad ways to secure wireless network.

  - by Moshe

  I was wondering if anybody had any thoughts on this, as I recently saw a Verizon DSL network set up where the WEP key was the last 8 characters of the router's MAC address. (It's bad enough that hey were using WEP in the first place...)

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• How secure is Windows IPSec VPN?

  - by sergeb

  I know the answer is, depends on how you configure it... But bare with me - our IPSec Site-to-Site VPN is configured by one of the most trusted hosting companies. One of our clients expressed concerns that "Windows Server 2008 Server IPSEC is not ICSA certified and lacks some of the common features for maintaining VPN stability" (they refer to the lack of "auto keep live" feature). They also are saying that "Windows platforms are not recommended as VPN endpoints due to security concerns and this is one reason that the ICSA testing labs will not certify it as a valid IPSEC solution" (I couldn't find a proof to this one) Are there any whitepapers or references that can prove the security of Windows IPSec implementation? Thanks!

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• How do I secure Sql Server 2008 R2

  - by Mark Tait

  I have both a dedicated and a VPS (from Fasthosts) virtual server - the web sites/applications I run on these, access Sql Server stored on the same web server. Until now, I have logged onto Sql Server on both the deidicated and VPS server, from Sql Server Management Studio - until I noticed in my server application logs, multiple attempts to logon to Sql Server using the 'sa' username, but failed password. So someone/bot is trying hard (repeatedly every couple of hours, for approx 20 attempts during each instance) to log on... so obviously I have to lock down access to Sql Sever remotely. What I have done is gone into Configuration Manager, and in Sql Server Network Configuration - Protocols for Sql2008 and also in Sql Native Client 10.0 Configuration - Client Protocols - I have diabled Named Pipes, TCP/IP (and VIA by default). I have left Shared Memory enabled. I also disabled in Sql Server Services, the Sql Server Browser. Now the only way I can manage the databases on these servers, is by logging on to them via Remote Desktop. Can anyone confirm if this is the correct way of stopping anyone maliciously logging on to Sql Server? (I'm not a DBA or security expert - and there are hundreds of articles advising all different ways - but I was hoping for the experts here to confirm, or otherwise, if what I've done is correct) Thank you, Mark

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• iptables secure squid proxy

  - by Lytithwyn

  I have a setup where my incoming internet connection feeds into a squid proxy/caching server, and from there into my local wireless router. On the wan side of the proxy server, I have eth0 with address 208.78.∗∗∗.∗∗∗ On the lan side of the proxy server, I have eth1 with address 192.168.2.1 Traffic from my lan gets forwarded through the proxy transparently to the internet via the following rules. Note that traffic from the squid server itself is also routed through the proxy/cache, and this is on purpose: # iptables forwarding iptables -A FORWARD -i eth1 -o eth0 -s 192.168.2.0/24 -m state --state NEW -j ACCEPT iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A POSTROUTING -t nat -j MASQUERADE # iptables for squid transparent proxy iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j DNAT --to 192.168.2.1:3128 iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128 How can I set up iptables to block any connections made to my server from the outside, while not blocking anything initiated from the inside? I have tried doing: iptables -A INPUT -i eth0 -s 192.168.2.0/24 -j ACCEPT iptables -A INPUT -i eth0 -j REJECT But this blocks everything. I have also tried reversing the order of those commands in case I got that part wrong, but that didn't help. I guess I don't fully understand everything about iptables. Any ideas?

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• HOw to secure whm/cpanel centos server from javascript malacious code virus

  - by Master

  Recently my sites index.php code was replaced some malacious javascript virus code. I really don't know how did that entered into that page. Today when i tried to download that file via ftp then antivirus gave me the warning. So it means it was not entered from my computer. Is there any way to install some antivirus on VPS server with centos 5 , cpanel/whm so that those code should not be allowed to add. also what is mod_security . will it be helpful.

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• VirtualBox - Continuous Integration with Secure virtual server

  - by stacker

  I have a repository on the host machine that I need to expose to the virtual machine but not the the other world (even other computers on the router). On the virtual machine I have a deployed web application that I need to be exposed to my host only. Is that can be achievable?

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• Solution for secure online remote presentation?

  - by Greg Joshner

  Hello, what is your (subscription free) solution to share a presentation with a number of users (below 50) that works without plug-ins in a browser and allows the presentation to be centrally controlled (and thus prevents participating users from "flipping forward")? I won't need print, save as or offline features, just showing and controlling a presentation centrally. Thanks a lot for your help!

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• Own server, multiple website: most secure PHP setup

  - by plua

  Hi there, We have a company server with a variety of websites. They are maintained by different people from within our company. All websites are public. The server access is limited to our company only. This is NOT a shared hosting environment. We are looking into securing the server, currently analyzing the risk related to permissions of files. We feel the highest risk is when files are uploaded and then opened/executed by the public. This should not happen, but an error in a script might allow people to do so (there are image uploaders, file uploaders, etc). Uploader scripts use PHP. So the question is: what is the best way of setting / organizing permissions of files and processes? There seem to be several options to run PHP (and Apache), and setting the permissions. What should we take into consideration? Any tips? We are considering mod_php and FastCGI, but perhaps given our situation other solutions are preferred?

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• How to configure machines in a public subnet with two gateways?

  - by Shtééf

  We have a single public /24 subnet, with a BGP router as the primary gateway. Now I'm interested in configuring a second router for redundancy. How do I deal with multiple gateways on the servers in our public subnet? I found some other questions related to multiple gateways that seem to deal with NAT set-ups. In my situation, the servers all have public routed IP-addresses. So from what I can tell, it doesn't really matter which route incoming or outgoing packets take. But I figure the servers need some way of telling when one of the gateways is down, and route around it? Is this accomplished with protocols such as OSPF? And do I need to deploy this on all my servers?

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• Utilize two gateways on the same network same interface with load balancing

  - by RushPL

  My setup is two ISPs on a single interface and single network. I can either set my default gateway to 192.168.0.1 or 192.168.1.250 and either work. My desire is to utilize both of them with some load balancing. I have tried to follow the advice given in here http://serverfault.com/a/96586 #!/bin/sh ip route show table main | grep -Ev '^default' \ | while read ROUTE ; do ip route add table ISP1 $ROUTE done ip route add default via 192.168.1.250 table ISP1 ip route add default via 192.168.0.1 table ISP2 iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark iptables -t mangle -A PREROUTING -m mark ! --mark 0 -j ACCEPT iptables -t mangle -A PREROUTING -j MARK --set-mark 10 iptables -t mangle -A PREROUTING -m statistic --mode random --probability 0.5 -j MARK --set-mark 20 iptables -t mangle -A PREROUTING -j CONNMARK --save-mark Now then I do "traceroute somehost" repeatedly I can only get route through my default route which is 192.168.1.250. Shouldn't the packets change routes in a random manner? How to debug it?

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• Which wireless keyboard is most secure?

  - by Axxmasterr

  I want to allow someone to use a keyboard wirelessly but I am concerned that the user passwords will be sent across the wire too. Is there a wireless keyboard that encrypts the keystream? I bought an IR keyboard setup however it lacks the range to be useful more than a few feet away from the detector. I need a range of 10 feet.

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• Secure copying (file transfer) between two Linux servers in the same datacenter (Linode)

  - by MountainX

  I have two Linodes in the same data center. I want to copy files from one to the other each night or on demand (for about the next month, until this project is finished). So I'm thinking about using rsync. My question is how do I set up the two Linode servers to communicate via private IP addresses securely? Both servers are SSH hardened, they use denyhosts and have a fairly restrictive iptables setup. I know I need to first assign private IP addresses to each server, then configure static networking according to this guide. What is next? What SSH or iptables settings are needed to allow these two servers to communicate? What further info do I need to supply in this question? I'm looking for a basic step-by-step guide for how to do this.

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• How secure is TeXShop+Truecrypt on OS X?

  - by trolle3000

  Hello All of the question I would like to ask is pretty much contained in the title... I have a couple Truecrypt-encrypted folders on OS X, where I keep some .tex documents I edit in TeXShop, and the question is: does TexShop 'bleed' information? Does it store temporary files anywhere else on the system? Filenames, filecontents etc. Cheers!

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