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  • I want to use OpenVPN to access the web and email from China. How?

    - by gaoshan88
    My question: How do I use my already existing OpenVPN setup to enable secure, remote web surfing and email checking from open wireless hotspots? Some long winded details: I am running Ubuntu and have OpenVPN up and working fine as a server. My client machine connects fine as well. However, that just gets me a secure connection to my home network. What I want is to be able to access my VPN server and surf the web or check email securely from anywhere with an open wireless connection. I am frequently in China and having secure, unblocked access would be a boon (especially since I like to work from tea houses and coffee shops and I've already had a password sniffed and hacked once). I already know how to tunnel over SSH via a SOCKS proxy using something like: ssh -ND 8887 -p 22 [email protected] but since I have OpenVPN I figure why not try it? So... what are the steps involved in making it so I can connect to my VPN and the surf and check mail to my hearts content (slowly to be sure but at least it wold be secure). Thx!

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  • Files deleted. What could have happened?

    - by jjfine
    I'm having a weird issue today. I was writing and testing out some simple cgi scripts this morning when I realized that I couldn't run them from one of the other computers on the (windows) network. So I had my network admin come in and take a look at what was going on. A few minutes later a co-worker came in and told me that a bunch of files he was working with as well as a bunch of others (all *.c files) on the network drive got deleted. He also noticed some strange apache_dump_500.log.txt files in the same directories where the files got deleted. The apache_dump_500.log.txt files all look like this: REDIRECT_HTTP_ACCEPT=*/*, image/gif, image/x-xbitmap, image/jpeg REDIRECT_HTTP_USER_AGENT=Mozilla/1.1b2 (X11; I; HP-UX A.09.05 9000/712) REDIRECT_PATH=.:/bin:/usr/local/bin:/etc REDIRECT_QUERY_STRING= REDIRECT_REMOTE_ADDR=<my computer's local ip> REDIRECT_REMOTE_HOST= REDIRECT_SERVER_NAME=<my computer's domain url> REDIRECT_SERVER_PORT= REDIRECT_SERVER_SOFTWARE= REDIRECT_URL=/cgi-bin/trojan.py I looked and I don't have any trojan.py in my cgi-bin folder. And all my apache logs are clean. Windows event logger seems to not have any traces of what happened either. My httpd.conf: http://pastebin.com/Yny2Yh8v I think we've got some kind of virus that added this trojan.py file to my cgi-bin, ran the script, and deleted the script and any traces from the logs. Is this a thing that happens? Any ideas whatsoever would be much appreciated!

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  • How to reliably keep an SSH tunnel open?

    - by Peltier
    I use an SSH tunnel from work to go around various idotic firewalls (it's ok with my boss :)). The problem is, after a while the ssh connection usually hangs, and the tunnel is broken. If I could at least monitor the tunnel automatically, I could restart the tunnel when it hangs, but I haven't even figured a way of doing that. Bonus points for the one who can tell me how to prevent my ssh connection from hanging, of course!

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  • iptables ACCEPT policy

    - by kamae
    In Redhat EL 6, iptables INPUT policy is ACCEPT but INPUT chain has REJECT entry in the end. /etc/syconfig/iptables is as below: *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT Do you know why the policy is ACCEPT not DROP? I think setting DROP policy is safer than ACCEPT in case to make mistake in the chain. Actually the policy is not applied to any packet: # iptables -L -v Chain INPUT (policy ACCEPT 0 packets, 0 bytes)

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  • How to set up Drupal Plugin Manager on MAMP in a secure way?

    - by Andrei
    Hi, I use MAMP PRO as global webserver. First of all, is it a good idea? Secondly, my objective is to run a Drupal website with as easy management as possible. Now I want to use Plugin Manager module to install additional modules and themes for my website. It wants to use ftp for that, and I know that if I open access to FTP port then IT-department guys will come to me and ask to shut it down. So I wonder if there is a way to allow Plugin Manager to install modules, having the port 21 closed somehow?

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  • CentOS: How to prevent a user from executing an application installed in a specific directory

    - by slayernoah
    I have an application installed in /etc/mydir. I have executed the following to remove the ability for users to execute this program. chown root:group1 /etc/mydir -R chmod 700 /etc/mydir -R I created a new user and logged in as this user. The new user was not added to group1 However, I was able to execute this program by just typing the program name. How can I stop users being able to run this using chmod and chown. Please let me know. PS. the new users cannot cd into /etc/mydir but they can still execute using the program name.

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  • Updating snort rules automatically

    - by Matt Simmons
    I've been working on getting my snort machine up and running, and working through Snort IDS and IPS Toolkit. The authors suggest using Oinkmaster, but on that website, the last update was February of 2008. That seems sort of...odd. Maybe there haven't been any issues with oinkmaster in the past year and a half, but it made me wonder if there was another solution that I don't know about. If you use snort, do you automatically update your rules, and if so, how?

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  • How to detect device type from device connected to router?

    - by molly
    I have a att router and there is an unknown device connected to my network. I can't seem to kick it off because of how att's router settings are created which is kind of dumb. I am able to see its local ip and mac address. I am on a mac with snow leopard. How can I get more information on the device with the information that I have? I want to see what kind of device it is, I have checked all devices that are connected to the router and none seem to match the local ip that is connected. I have WPA encryption setup with a strong password.

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  • MySQL asking a user for SUPER privilege to perform a delete.

    - by Fran
    Hello, When trying to do a delete operation on a table, mysql reports the following error: Error code 1227: Access denied; you need the SUPER privilege for this operation. However, my user has this privilege granted for all tables in the schema: GRANT ALL PRIVILEGES ON myschema.* TO 'my_admin'@'%' How come it asks me for SUPER privilege for a delete? Thanks in advance.

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  • securing unpatched websites

    - by neuron
    I have a client with a lot (read several thousand) websites in several old cms solutions that are no longer maintained. Now moving all of them to a maintained solution isn't really an option at this point. So I'm thinking about ways to secure the solutions without patching them. The solutions are mostly joomla 1.0/1.5 and wordpress. What I'm thinking is something like this: mod_suexec to lock everyone into their own home directory apparmor to deny any and all file writes by default. (exclude by default, include things like "images" directories). use htaccess to prevent anything in writable directories from being executed. (aka disable php_engine for images/ directory). mysql triggers to check the "users" tables to prevent adding new admins/superadmins. Does this make sense? Is it viable? Am I missing something obvious?

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  • Router reporting failed admin login attempts from home server

    - by jeffora
    I recently noticed in the logs of my home router that it relatively regularly lists the following entry: [admin login failure] from source 192.168.0.160, Monday, June 20,2011 18:13:25 192.168.0.160 is the internal address of my home server, running Windows Home Server 2011. Is there anyway I can find out what specifically is trying to login to the router? Or is there some explanation for this behaviour? (not sure if this belongs here or on superuser...) [Update] I've run both Wireshark and netmon for a while on my home server. Wireshark captured the traffic, but didn't really show anything useful (or nothing I could make use of). A simple HTTP GET request is sent from the server (192.168.0.160) to the router (192.168.0.1), from a seemingly random port (I've seen examples from 50068, 52883), and it appears to do it twice in quick succession (incrementing port by 1), about every hour. Running netstat around the time of the failure didn't show anything (probably too long after anyway). I tried using netmon as it categorises by process, so I thought it might show a corresponding process for the port. Unfortunately, this comes in under the 'unknown' category, meaning it's basically just a slower, less useful Wireshark. I know there's not much to go on here, but does this help in anyway?

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  • how to detect device type from connected device to router?

    - by molly
    i have a att router and there is an unknown device connected to my network. i cant seem to kick it off because of how att's router settings are created which is kind of dumb. i am able to see its local ip and mac address. i am on a mac with snow leopard. how can i get more information on the device with the information that i have? i want to see what kind of device it is, i have checked all deviced that are connected to the router and non seem to match the local ip that is connected. i have wpa encryption setup with a strong password.

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  • Can remote LogMeIn Hamachi users access our local LAN?

    - by Kev
    Unknown to me, one of the kids has installed LogMeIn Hamachi on his PC so that he can access and play on his pal's Minecraft server, and vice versa. One of the things I did was disable the Client for Microsoft Networks and File and Printer Sharing for Microsoft Networks on the Hamachi NIC in Windows 7's Network Connections. However, my lack of fu when it comes to these types of services is leaving me feeling a little uncomfortable about him using this. Is there anything I should be worried about here? For example, can his friends access our local LAN (which has a number of NAS boxes with unsecured shares) and get up to no good?

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  • What is a good solution for an adaptive iptables daemon?

    - by Matt
    I am running a series of web servers and already have a pretty good set of firewall rules set up, however I'm looking for something to monitor the traffic and add rules as needed. I have denyhosts monitoring for bad SSH logins, and that's great - but I'd love something I could apply to the whole machine that would help prevent bute force attacks against my web applications as well, and add rules to block IPs that display evidence of common attacks. I've seen APF, but it looks as though it hasn't been updated in several years. Is it still in use and would it be good for this? Also, what other solutions are out there that would manipulate iptables to behave in some adaptive fashion? I'm running Ubuntu Linux, if that helps.

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  • what constitutes out-of-band access to a server?

    - by broiyan
    The first time I access my server with a new installation of Filezilla or Putty, I will get prompted that I should continue only if the RSA key shown to me is correct. The cloud provider has advice on their website that I ought to use their AJAX console to get a key out-of-band with which to compare to the one shown by Filezilla. The AJAX console is launched from a link on the cloud provider's website which requires a login. Exactly how is this AJAX console considered to be out-of-band when it obviously is not a form of physical access to the server?

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  • Best way to find the computer a user last logged on from?

    - by Garrett
    I am hoping that somewhere in Active Directory the "last logged on from [computer]" is written/stored, or there is a log I can parse out? The purpose of wanting to know the last PC logged on from is for offering remote support over the network - our users move around pretty infrequently, but I'd like to know that whatever I'm consulting was updating that morning (when they logged in, presumably) at minimum. I'm also considering login scripts that write the user and computer names to a known location I can reference, but some of our users don't like to logout for 15 days at a time. If there is an elegant solution that uses login scripts, definitely mention it - but if it happens to work for merely unlocking the station, that would be even better!

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  • iptables -- OK, **now** am I doing it right?

    - by Agvorth
    This is a follow up to a previous question where I asked whether my iptables config is correct. CentOS 5.3 system. Intended result: block everything except ping, ssh, Apache, and SSL. Based on xenoterracide's advice and the other responses to the question (thanks guys), I created this script: # Establish a clean slate iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT iptables -F # Flush all rules iptables -X # Delete all chains # Disable routing. Drop packets if they reach the end of the chain. iptables -P FORWARD DROP # Drop all packets with a bad state iptables -A INPUT -m state --state INVALID -j DROP # Accept any packets that have something to do with ones we've sent on outbound iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT # Accept any packets coming or going on localhost (this can be very important) iptables -A INPUT -i lo -j ACCEPT # Accept ICMP iptables -A INPUT -p icmp -j ACCEPT # Allow ssh iptables -A INPUT -p tcp --dport 22 -j ACCEPT # Allow httpd iptables -A INPUT -p tcp --dport 80 -j ACCEPT # Allow SSL iptables -A INPUT -p tcp --dport 443 -j ACCEPT # Block all other traffic iptables -A INPUT -j DROP Now when I list the rules I get... # iptables -L -v Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 DROP all -- any any anywhere anywhere state INVALID 9 612 ACCEPT all -- any any anywhere anywhere state RELATED,ESTABLISHED 0 0 ACCEPT all -- lo any anywhere anywhere 0 0 ACCEPT icmp -- any any anywhere anywhere 0 0 ACCEPT tcp -- any any anywhere anywhere tcp dpt:ssh 0 0 ACCEPT tcp -- any any anywhere anywhere tcp dpt:http 0 0 ACCEPT tcp -- any any anywhere anywhere tcp dpt:https 0 0 DROP all -- any any anywhere anywhere Chain FORWARD (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 5 packets, 644 bytes) pkts bytes target prot opt in out source destination I ran it and I can still log in, so that's good. Anyone notice anything major out of wack?

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  • Windows Server 2008 r2 Hardening [on hold]

    - by Natasha
    I have created windows server 2008 r2, running on VM, Where Running services in Server Manager 1) File services ( in Role) 2) Telnet Client ( Features) Windows Firewall Disabled and we are using TOMCAT APACHE WEB SERVER, here i want to harden the windows server, While running SCW by simply clicking with default NEXT, at last when i have clicked SAVE and RUN now in SCW, immediately my remote desktop services disabled. May I Know the things i want to add in Roles,features and finally want to harden windows ? and also what about audit policy and network settings in that ? Please help me out, Don't Ignore.

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  • Finding proof of server being compromised by Black Hole Toolkit exploit

    - by cosmicsafari
    I recently took over maintenance of a company server. (Just Host, C Panel, Linux server), theres a tonne of websites on it which i know nothing about. It had came to my attention that a client had attempted to access one of the websites hosted on this server and was met with a warning from windows defender. It had blocked access because it said the website had been compromised by the Black Hole Toolkit or something to that effect. Anyway I went in and updated various plugins and deleted some old suspect websites. I have since ran the website in question through a few online malware scanners and its comes up clean everytime. However im not convinced. Do any of you guys know extensive ways i can check that the server isn't still compromised. I have no way to install any malware scanners or anti virus programs on the server as it is horribly locked down by Just Host.

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  • In Windows XP, is it possible to disable user credential caching for particular users

    - by kdt
    I understand that when windows caches user credentials, these can sometimes be used by malicious parties to access other machines once a machine containing cached credentials is compromised, a method known as "pass the hash"[1]. For this reason I would like to get control over what's cached to reduce the risk of cached credentials being used maliciously. It is possible to prevent all caching by zeroing HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\CachedLogonsCount, but this is too indiscriminate: laptops users need to be able to login when away from the network. What I would like to do is prevent the caching of credentials of certain users, such as administrators -- is there any way to do that in Windows XP? http://www.lbl.gov/cyber/systems/pass-the-hash.html

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  • How secure is Remote Desktop from OSX to Windows Server 2003?

    - by dwhsix
    It's unclear to me exactly how secure Remote Desktop access from OSX to a Windows Server 2003 machine is. Is the communication encrypted by default? What level of encryption? Are there best practices for making this as secure as possible? I found http://www.mobydisk.com/techres/securing_remote_desktop.html but it's unclear how much of that is still relevant for current versions of RDP and Windows Server. I know I can tunnel RDP over ssh, but is that overkill or redundant? Thanks...

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