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• Unable to outside access service from inside LAN

  - by erotsppa

  I have a weird port forwarding problem. I tried to open my port 22 to the outside network. I was able to access it as long as I am not inside the LAN. I can access it from my office for example. But from within the LAN, I can access the port using the local ip, but I can't access the port using the external IP. It's as if the router is blocking the loopback. I've check all my router settings, turned off anything firewall/filtering related. Any ideas?

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• Myvidoop error when trying to log in

  - by paul-werner.mp

  Recently I have not been able to get into my myvidoop username. It won't even bring up the pictures and asks to send the access code to one of my email addresses. I have seen this message before and there was no error previously but now it will not send the access code. I've tried accessing the site through firefox and through IE but I get the same thing (whether I went through the add on to get to the site or just typed in the website). I just want to know if I possibly have something that could be blocking it from sending this out. I use the free version of Avira for protection, run Ad Muncher (but I've also tried to get this access code with Ad Muncher closed), and have Ad Block Pro plugin (but like I've said before, the same thing happens in IE). I know it uses Java to send this access code out and I've even updated Java but still cannot get it to send it to me.

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• Spamassassin: How to delete all spam messages on the server?

  - by Beck

  Can't find out, how to configure spamassassin to delete all spam messages. Currenly it's only mark messages as spam, but pass them throught IMAP to client. How to block them from passing through to IMAP clients? http://spamassassin.apache.org/full/3.3.x/doc/Mail_SpamAssassin_Conf.html And it's blocking some of our notification messages... -1.4 ALL_TRUSTED Passed through trusted hosts only via SMTP 0.0 HTML_MESSAGE BODY: HTML included in message 2.4 HTML_IMAGE_ONLY_08 BODY: HTML: images with 400-800 bytes of words 2.9 TVD_SPACE_RATIO BODY: TVD_SPACE_RATIO 1.7 MIME_HTML_ONLY BODY: Message only has text/html MIME parts 1.1 HTML_MIME_NO_HTML_TAG HTML-only message, but there is no HTML tag 1.1 HTML_SHORT_LINK_IMG_1 HTML is very short with a linked image -1.4 AWL AWL: From: address is in the auto white-list This is what clients getting on their mails in place of our notification messages. Any idea how to pass those messages through and how to delete incoming spam? Thanks ;) I have this setup: postfix spamassassin clamav-daemon amavis

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• How to disable or edit Google Chrome Developer Tools shortcut?

  - by HoLyVieR

  There is a shortcut in the Google Chrome Developer Tools which happen to trigger every times I try to type the [ or ] character in the console. The shortcut in question probably is Alt+[, Alt+^ or [ and it moves the tabs (of the Chrome Developer Tools) to the last selected one. This shortcut is simply blocking me from typing the [ or ] in the console and I want to either disable it or edit it to something else. How can I edit or disable that shortcut ? Note : I'm not really using the shortcut in the developers tools, so if it's only possible to disable all shortcut it would be a viable solution.

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• VMWare-Tools Installation fails on Ubuntu 11.04

  - by Ajay

  I am trying to install VMwareTools-8.4.6-385536.tar.gz (VMWare Tools) on the following operating system: Ubuntu 11.04 - Linux ubuntu 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686 i686 i386 GNU/Linux I am using VMPlayer version 3.1.4 - build 385536 ==================================================================== After starting the installation i am getting the following errors: What is the directory that contains the init scripts? [/etc/init.d] Error opening No such file or directory ================================================ Distribution provided drivers for Xorg X server are used. Skipping X configuration because X drivers are not included. Creating a new initrd boot image for the kernel. update-initramfs: Generating /boot/initrd.img-2.6.38-8-generic Starting VMware Tools services in the virtual machine: Switching to guest configuration: done Blocking file system: done Guest operating system daemon: failed Virtual Printing daemon: done Unable to start services for VMware Tools Can somebody help in this?

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• Need help configurating my Tomcat server without any WAR files

  - by gablin

  I just reinstalled my entire server, and now I can't seem to get my JSP-based website to work on Tomcat anymore. I use the same server.xml file, which worked perfectly before the reinstallation, but no longer. Here's the content of the server.xml file which worked before: <!--APR library loader. Documentation at /docs/apr.html --> <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" /> <!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html --> <Listener className="org.apache.catalina.core.JasperListener" /> <!-- JMX Support for the Tomcat server. Documentation at /docs/non-existent.html --> <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" /> <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" /> <!-- Global JNDI resources Documentation at /docs/jndi-resources-howto.html --> <GlobalNamingResources> <!-- Editable user database that can also be used by UserDatabaseRealm to authenticate users --> <Resource name="UserDatabase" auth="Container" type="org.apache.catalina.UserDatabase" description="User database that can be updated and saved" factory="org.apache.catalina.users.MemoryUserDatabaseFactory" pathname="conf/tomcat-users.xml" /> </GlobalNamingResources> <!-- A "Service" is a collection of one or more "Connectors" that share a single "Container" Note: A "Service" is not itself a "Container", so you may not define subcomponents such as "Valves" at this level. Documentation at /docs/config/service.html --> <Service name="Catalina"> <!--The connectors can use a shared executor, you can define one or more named thread pools--> <!-- <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="150" minSpareThreads="4"/> --> <!-- A "Connector" represents an endpoint by which requests are received and responses are returned. Documentation at : Java HTTP Connector: /docs/config/http.html (blocking & non-blocking) Java AJP Connector: /docs/config/ajp.html APR (HTTP/AJP) Connector: /docs/apr.html Define a non-SSL HTTP/1.1 Connector on port 8080 --> <Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> <!-- A "Connector" using the shared thread pool--> <!-- <Connector executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> --> <!-- Define a SSL HTTP/1.1 Connector on port 8443 This connector uses the JSSE configuration, when using APR, the connector should be using the OpenSSL style configuration described in the APR documentation --> <!-- <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true" maxThreads="150" scheme="https" secure="true" clientAuth="false" sslProtocol="TLS" /> --> <!-- Define an AJP 1.3 Connector on port 8009 --> <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> <!-- An Engine represents the entry point (within Catalina) that processes every request. The Engine implementation for Tomcat stand alone analyzes the HTTP headers included with the request, and passes them on to the appropriate Host (virtual host). Documentation at /docs/config/engine.html --> <!-- You should set jvmRoute to support load-balancing via AJP ie : <Engine name="Standalone" defaultHost="localhost" jvmRoute="jvm1"> --> <Engine name="Catalina" defaultHost="localhost"> <!--For clustering, please take a look at documentation at: /docs/cluster-howto.html (simple how to) /docs/config/cluster.html (reference documentation) --> <!-- <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> --> <!-- The request dumper valve dumps useful debugging information about the request and response data received and sent by Tomcat. Documentation at: /docs/config/valve.html --> <!-- <Valve className="org.apache.catalina.valves.RequestDumperValve"/> --> <!-- This Realm uses the UserDatabase configured in the global JNDI resources under the key "UserDatabase". Any edits that are performed against this UserDatabase are immediately available for use by the Realm. --> <Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/> <!-- Define the default virtual host Note: XML Schema validation will not work with Xerces 2.2. --> <!-- <Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false"> --> <!-- SingleSignOn valve, share authentication between web applications Documentation at: /docs/config/valve.html --> <!-- <Valve className="org.apache.catalina.authenticator.SingleSignOn" /> --> <!-- Access log processes all example. Documentation at: /docs/config/valve.html --> <!-- <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/> --> <!-- </Host> --> <Host name="www.rebootradio.nu"> <Alias>rebootradio.nu</Alias> <Context path="" docBase="D:/services/http/rebootradio.nu" debug="1" reloadable="true"/> </Host> </Engine> </Service> </Server> The JSP site doesn't use any WAR files or anything like that; there's just a default.jsp in the specified folder D:/services/http/rebootradio.nu which loads the site. As I said, this configuration worked before, but now with the latest verion of XAMPP and Tomcat it doesn't work anymore. All I get is a 404 message saying The requested resource () is not available.

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• How to install anti-virus without administrative rights?

  - by Rohit

  In situations where the PC has no CD drive and operating a guest account with limited privileges, how to install an anti-virus tool? Malware is not permitting to open any anti-virus vendor's site and also blocking all sites opened via Google that contain the term "online scan". I somehow managed to download through mirror links with a Download Manager as the browser's download was blocked by the malware. But the problem didn't end there. After I downloaded the anti-virus tool, it failed to install because it needed administrative rights. The user didn't know the administrator password. I tried via command line with runas, but it also asks for the administrator password. The OS is Windows XP. How to deal with these type of malwares if there is a scenario that CD drive is not there only Internet is there?

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• What services does hosts.allow NOT affect?

  - by Jed Daniels

  I know that hosts.allow and host.deny only affect things that are tcpwrappered, but what does this mean in practice? It seems that most people use hosts.allow to handle ssh and nfs blocking, but what other services are typically handled there? And what services AREN'T typically handled there? Edit: ok, I realize I did a terrible job of explaining what I was after. No, I'm not interested in knowing if a particular service can be handled by hosts.allow, I want to know if a service will be handled. For example, if I do an lsof -i, I get a nice list of things that are listening for connections to my box. I want to know which ones will be affected if I go stick an entry into hosts.allow (well, I really want to know which ones won't be affected).

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• How to forward external port to internal port using plink

  - by user857990

  For a penetration test where I have shell access to a computer running an old Windows, I'd like to forward port 4450 to 127.0.0.1:445 because the firewall is blocking 445 externally. I'm stuck on the following: plink -L 4450:127.0.0.1:445 SSH-Server According to the documentation I've found, I'd have to specify a SSH-Server. But all documentation I've found just uses an SSH-Server in the same network. To forward it to a localhost port, that wouldn't help. Do I have to install an SSH-Server on that machine or are there other ways?

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• apache tomcat loadbalancing clustering on ubuntu

  - by user740010

  i am facing a problem in clustering the tomcat with apache as a loadbalancer using mod_jk on ubuntu. i have install apache2 on my ubuntu 11.04 and i have downloaded tomcat7 created two copies and kept them at two different location. 1st one is at /home/net4u/vishal/test/tomcatA 2nd one is at /home/net4u/vishal/test1/tomcatB i have made following changes to server.xml file in /conf folder 1. <Server port="8205" shutdown="SHUTDOWN"> 2. <Connector port="8280" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> 3.<Connector port="8209" protocol="AJP/1.3" redirectPort="8443" /> <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcatB"> 4. <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> similarly i have modified other tomcat i.e tomcatA server.xml content of the server.xml is as follow: -- <!--The connectors can use a shared executor, you can define one or more named thread pools--> <!-- <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="150" minSpareThreads="4"/> --> <!-- A "Connector" represents an endpoint by which requests are received and responses are returned. Documentation at : Java HTTP Connector: /docs/config/http.html (blocking & non-blocking) Java AJP Connector: /docs/config/ajp.html APR (HTTP/AJP) Connector: /docs/apr.html Define a non-SSL HTTP/1.1 Connector on port 8080 --> <Connector port="8280" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> <!-- A "Connector" using the shared thread pool--> <!-- <Connector executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> --> <!-- Define a SSL HTTP/1.1 Connector on port 8443 This connector uses the JSSE configuration, when using APR, the connector should be using the OpenSSL style configuration described in the APR documentation --> <!-- <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true" maxThreads="150" scheme="https" secure="true" clientAuth="false" sslProtocol="TLS" /> --> <!-- Define an AJP 1.3 Connector on port 8009 --> <Connector port="8109" protocol="AJP/1.3" redirectPort="8443" /> <!-- An Engine represents the entry point (within Catalina) that processes every request. The Engine implementation for Tomcat stand alone analyzes the HTTP headers included with the request, and passes them on to the appropriate Host (virtual host). Documentation at /docs/config/engine.html --> <!-- You should set jvmRoute to support load-balancing via AJP ie : <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1"> --> <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcatB"> <!--For clustering, please take a look at documentation at: /docs/cluster-howto.html (simple how to) /docs/config/cluster.html (reference documentation) --> <!-- uncomment for clustering--> <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> <!-- Use the LockOutRealm to prevent attempts to guess user passwords via a brute-force attack --> <Realm className="org.apache.catalina.realm.LockOutRealm"> <!-- This Realm uses the UserDatabase configured in the global JNDI resources under the key "UserDatabase". Any edits that are performed against this UserDatabase are immediately available for use by the Realm. --> <Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/> </Realm> <Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true"> <!-- SingleSignOn valve, share authentication between web applications Documentation at: /docs/config/valve.html --> <!-- <Valve className="org.apache.catalina.authenticator.SingleSignOn" /> --> <!-- Access log processes all example. Documentation at: /docs/config/valve.html Note: The pattern used is equivalent to using pattern="common" --> <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="localhost_access_log." suffix=".txt" pattern="%h %l %u %t &quot;%r&quot; %s %b" resolveHosts="false"/> </Host> </Engine> i have install libapache2-mod-jk step 1. i have Created jk.load file in /etc/apache2/mods-enabled/jk.load content is as follows: LoadModule jk_module /usr/lib/apache2/modules/mod_jk.so Create /etc/apache2/mods-enabled/jk.conf: JkWorkersFile /etc/apache2/workers.properties JkLogFile /var/log/apache2/jk.log JkMount /ecommerce/* worker1 JkMount /images/* worker1 JkMount /content/* worker1 step 2. Created workers.properties file in /etc/apache2/workers.properties content is as follows: workers.tomcat_home=/home/vishal/Desktop/test/tomcatA workers.java_home=/usr/lib/jvm/default-java ps=/ worker.list=tomcatA,tomcatB,loadbalancer   worker.tomcatA.port=8109 worker.tomcatA.host=localhost worker.tomcatA.type=ajp13 worker.tomcatA.lbfactor=1   worker.tomcatB.port=8209 worker.tomcatB.host=localhost worker.tomcatB.type=ajp13 worker.tomcatB.lbfactor=1 worker.loadbalancer.type=lb worker.loadbalancer.balanced_workers=tomcatA,tomcatB worker.loadbalancer.sticky_session=1 i tried the same thing on the windows machine it is working.

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• Rewrite URL based off of IP on OpenWRT

  - by Scott

  We are running OpenWRT on a WRT54GL. I have been looking for an answer to this, but I can't seem to figure out what to search for, if its possible, or what combination of programs to use. I want to be able to redirect a HTTP request from a WiFi device based off of their MAC address. This should all be transparent to the device. Basically we are trying to redirect any non-registered devices to a website to register the device (at this point, we would push a new config to the router that would allow this MAC address "full access"). Once a device is registered, it will be redirected to a transparent squid proxy server on another machine for caching/blocking certain sites. I looked at tinyproxy - popilo which redirects but I won't have the MAC address to know if its registered or not. Any help (google suggestions, programs, anything!) would be very much appreciated!

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• remote desktop over wireless

  - by tbischel

  So I'm trying to run remote desktop on my laptop to connect to my home desktop. I have a problem where this works fine if I connect my laptop with an ethernet cable, but fails when I try to use wireless internet access (which works fine for normal internet surfing). I've experienced this problem at home with my wireless router, and at work with the wireless network they have there, so I'm inclined to believe that its a setting local to my machine rather than the router blocking the requests... but I'm not sure where to look. Any suggestions?

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• XDMCP works for Solaris, not for RHEL

  - by joshxdr

  I have some old RHEL4 servers that until recently I was able to connect to remotely with Exceed (remote desktop using XDMCP) from my windowsXP PC. My PC is connected to our network by wired LAN. Recently it seems something has changed in our network. I can still connect to all the old Solaris and HPUX servers with Exceed, but for some reason I can no longer connect to the RHEL4 servers. I assume this is some kind of "security" feature turned on in our network. Does anyone know what this might be, and how I can tell IT to re-enable it? Update: A colleague has found that he can connect (very slowly) to these RHEL4 boxes with XDMCP if he is using our VPN from home, but when he is in the office using wired LAN he cannot connect to them. So it seems that there is some kind of firewall or ???, part of our wired LAN network, that is blocking XDMCP traffic from RHEL4.

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• Lot of Multicast traffic on LAN

  - by Nel

  Recently the whole network at work is being hit by multicast traffic originating on the LAN itself. I did some investigating and the service which seems to be responsible is ws-discovery. I have attached a screenshot of wireshark capturing the traffic. I have tried shutting down the source machine from which it was originating, but the multicast traffic still seems to be present in the network. My network topology 2 subnets - 10.10.10.0/24 and 10.20.10.0/24. Gateway is a debian system. We have 3 switches for 3 floors. They are all unmanaged Dlink 24-port switches. Multicast blocking at switch level is out of the question. Any solutions? :(

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• How to block a program from using IPv4?

  - by Ian Boyd

  I have a program that can communicate over IPv4 (TCP and UDP) and over IPv6 (TCP and UDP). I want to block the program from being able to use IPv4. I tried the Windows Firewall: Except it blocks IP sub-protocols (e.g. TCP, UDP, encapsulated IPv6, GRE), rather than blocking IPv4 itself. In other words, I need to block IPv4: IPv4/TCP IPv4/UDP IPv4/ICMPv4 IPv4/GRE IPv4/L2TP while allowing IPv6: IPv6/TCP IPv6/UDP IPv6/ICMPv6 IPv6/GRE IPv6/L2TP Can I block a program from using IPv4? Note: If it cannot be done, then don't be afraid to add that as an answer. There's no shame in giving the correct answer to a question.

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• Win7 Prof. Computer won't wake on lan via Magic Packet from outside network

  - by Michael

  Hi all. I just purchased a new computer running Windows 7 Professional x64. I'd like to save power by having it sleep after an hour, but I would also like to be able to Remote Desktop into it at my leisure. I set up a static IP and have port forwarding set up on the router. If the computer is awake, the RDP connection works just fine. I downloaded and installed Wake-On-Lan thanks to this article If I put my new computer to sleep and send the magic packet from my old computer inside of my home network it wakes up. If I do the same thing, however, from my work computer outside the network it does not. I figured the Firewall was blocking the incoming traffic, but nothing in the Windows Firewall logs points to this happening. I'm wondering if anyone has any suggestions or any tests I can run through in order to narrow down what the problem might be. Thanks in advance for any help you might be able to offer.

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• Port Forwarding: Why do my local sites on 80 work but not those on 8080?

  - by Chadworthington

  I setup my router to forward port 80 to the PC hosting my web site. As a result, I am able to access this url (Don't bother clicking on it, it's just an example): http://my.url.com/ When i click on this link, it works: http://localhost:8080/tfs/web/ I also forward port 8080 to the same web server box But when I try to access this url I get the eror "Page Cannot be displayed:" http://my.url.com:8080/tfs/web/ I fwded port 8080 the same way I fwded port 80. I also turned off Windows Firewall, in case it was blocking port 8080. Any theories why port 80 works but 8080 does not?

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• How to protect an OS X Server from an anautorized physical connection?

  - by GJ

  Hi I have an OS X 10.6 server, which I administer via SSH and VNC (via SSH tunnel). I can't leave it at the login window since then VNC connections are refused. Therefore I currently leave it logged with my user account. Since it doesn't have a monitor attached, it doesn't go into screen saver mode, which means it doesn't require a password to retake control. This means it is very easy for anyone connecting a keyboard/mouse and monitor to take control of the system. The screen saver password protection, which I can't get to activate, unlike the system's login window, is perfectly compatible with VNC connections. How could I prevent such direct access to the server without connecting a monitor and without blocking my ability to connect with VNC? Thanks!

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• Better performance with memcached cluster or local memcaches?

  - by Nicholas Tolley Cottrell

  I have a small cluster of servers balancing a Java web app. Currently I have 3 memcached servers caching data and all web apps shares all 3 memcached instances. I often get strange slowdowns and timeouts to some of the memcacheds and I wondering if there is a good way of analyzing the performance. I am wondering whether my iptables rules (or some other system limitation) are blocking/slowing connections. I am considering reconfiguring the web apps so that they only query the memcached process on their own localhost.

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• Suppress EXT3-fs warning on mount

  - by STM

  I am familiar with output suppress on Unix machines, ie: cat /file/that/doesnt/exist > /dev/null 2>& However I can't seem to suppress the output of mount when an ext3 filesystem is mounted for the nth time, and it recommends an fsck. As it happens, fscks are run regularly by another machine, so these warning messages are needlessly interrupting the flow of output to my pretty bash script. These are the errors: # mount -t ext3 /dev/sda1 /mnt > /dev/null 2>& kjournald starting. Commit interval 5 seconds EXT3-fs warning: maximal mount count reached, running e2fsck is recommended EXT3 FS 2.4-0.9.19, 19 August 2002 on sd(8,1), internal journal EXT3-fs: mounted filesystem with ordered data mode. Can anyone shed some light on this? I'm clearly blocking both fd's, but somehow output is still getting through. This is GNU Bash v2.05a

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• Postfix - Unable to receive emails from certain domains

  - by Emmanuel

  Got a Postfix-Dovecot-Saslauthd setup on Ubuntu 10.04. Problem is there's (at least) one domain that it refuses to accept emails from. I've been getting emails fine from lots of different domains except one. It's really weird, but could some config file or something be blocking certain domains? or IPs? or something? I know the emails are being sent to me, infact I sent a test one myself from this domain and they're just not showing up.

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• Port forwarding does not work always?

  - by ITFan

  I opened port 25374, this is eMule TCP port, then I use canyouseeme.org to check if it is really opened. I got the weird problem : when eMule is running, canyouseeme.org see my port. I got the message : "Success: I can see your service on xxx.xx.xxx.xx on port (25374) Your ISP is not blocking port 25374" When I close eMule then check the port again on canyouseeme.org I got : Error: I could not see your service on xxx.xx.xxx.xx on port (25374) Reason: Connection timed out But when I turn off the windows firewall I got a different error : Error: I could not see your service on xxx.xx.xxx.xx on port (25374) Reason: Connection refused Can anyone please explain to me why it happened like that and how to make the port always opened ? Thanks

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• SMTP server problem

  - by ram

  Hi, Our requirement is to send weekly newsletters to our website customers. For which we wanted to have local hosted SMTP server in our office. We are not using SMTP server provided by website hosting provider, as we wanted to reduce the network traffic and avoid IP blocking due to bulk mails. We are sending newsletters on weekly basis from our local SMTP server. But due to some reasons, some emails are going to spam and some are not reaching to customers and sometimes there are bounce messages to follow bulk email guidelines (mainly from Gmail). Can you please suggest me, how to achieve my problem. I also wanted to know what type of technology generally Linkedin or banks uses to send notifications emails to all its customers. When they send bulk emails, they will always reach inbox with out any problem. I want the same solution to implement for my website. Please suggest me. Thank you very much in advance.

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• How to protect an OS X Server from an unauthorized physical connection?

  - by GJ

  Hi I have an OS X 10.6 server, which I administer via SSH and VNC (via SSH tunnel). I can't leave it at the login window since then VNC connections are refused. Therefore I currently leave it logged with my user account. Since it doesn't have a monitor attached, it doesn't go into screen saver mode, which means it doesn't require a password to retake control. This means it is very easy for anyone connecting a keyboard/mouse and monitor to take control of the system. The screen saver password protection, which I can't get to activate, unlike the system's login window, is perfectly compatible with VNC connections. How could I prevent such direct access to the server without connecting a monitor and without blocking my ability to connect with VNC? Thanks!

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• MySQL port 3306 blocked in csf yet can still telnet to port 3306 from external host

  - by Neek

  We have a Centos 6 VPS that was recently migrated to a new machine within the same web hosting company. It's running WHM/cPanel and has csf/lfd installed. csf is set up with mostly vanilla config. I'm no iptables expert, csf has not let me down before. If a port isn't in the TCP_IN list, it should be blocked on the firewall by iptables. My problem is that I can telnet to port 3306 from an external host, yet I think iptables ought to be blocking 3306 because of csf's rules. We are now failing a security check because of this open port. (this output is obfuscated to protect the innocent: www.ourhost.com is the host with the firewall problem) [root@nickfenwick log]# telnet www.ourhost.com 3306 Trying 158.255.45.107... Connected to www.ourhost.com. Escape character is '^]'. HHost 'nickfenwick.com' is not allowed to connect to this MySQL serverConnection closed by foreign host. So the connection is established, and MySQL refuses the connection due to its configuration. I need the network connection to be refused at the firewall level, before it reaches MySQL. Using WHM's csf web UI I can see 'Firewall Configuration' includes a fairly sensible TCP_IN line: TCP_IN: 20,21,22,25,53,80,110,143,222,443,465,587,993,995,2077,2078,2082,2083,2086,2087,2095,2096,8080 (lets ignore that I could trim that a little for now, my concern is that 3306 is not listed in that list) When csf is restarted it logs the usual slew of output as it sets up iptables rules, for example what looks like it blocking all traffic and then allowing specific ports like SSH on 22: [cut] DROP all opt -- in * out * 0.0.0.0/0 -> 0.0.0.0/0 [cut] ACCEPT tcp opt -- in !lo out * 0.0.0.0/0 -> 0.0.0.0/0 state NEW tcp dpt:22 [cut] I can see that iptables is running, service iptables status returns a long list of firewall rules. Here is my Chain INPUT section from service iptables status, hopefully that's enough to show how the firewall is configured. Table: filter Chain INPUT (policy DROP) num target prot opt source destination 1 acctboth all -- 0.0.0.0/0 0.0.0.0/0 2 ACCEPT tcp -- 217.112.88.10 0.0.0.0/0 tcp dpt:53 3 ACCEPT udp -- 217.112.88.10 0.0.0.0/0 udp dpt:53 4 ACCEPT tcp -- 217.112.88.10 0.0.0.0/0 tcp spt:53 5 ACCEPT udp -- 217.112.88.10 0.0.0.0/0 udp spt:53 6 ACCEPT tcp -- 8.8.4.4 0.0.0.0/0 tcp dpt:53 7 ACCEPT udp -- 8.8.4.4 0.0.0.0/0 udp dpt:53 8 ACCEPT tcp -- 8.8.4.4 0.0.0.0/0 tcp spt:53 9 ACCEPT udp -- 8.8.4.4 0.0.0.0/0 udp spt:53 10 ACCEPT tcp -- 8.8.8.8 0.0.0.0/0 tcp dpt:53 11 ACCEPT udp -- 8.8.8.8 0.0.0.0/0 udp dpt:53 12 ACCEPT tcp -- 8.8.8.8 0.0.0.0/0 tcp spt:53 13 ACCEPT udp -- 8.8.8.8 0.0.0.0/0 udp spt:53 14 LOCALINPUT all -- 0.0.0.0/0 0.0.0.0/0 15 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 16 INVALID tcp -- 0.0.0.0/0 0.0.0.0/0 17 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 18 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:20 19 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:21 20 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 21 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:25 22 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:53 23 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:80 24 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:110 25 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:143 26 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:222 27 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:443 28 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:465 29 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:587 30 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:993 31 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:995 32 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2077 33 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2078 34 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2082 35 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2083 36 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2086 37 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2087 38 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2095 39 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2096 40 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:8080 41 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW udp dpt:20 42 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW udp dpt:21 43 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW udp dpt:53 44 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW udp dpt:222 45 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW udp dpt:8080 46 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 8 47 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 0 48 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 11 49 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 3 50 LOGDROPIN all -- 0.0.0.0/0 0.0.0.0/0 What's the next thing to check?

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