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Suggest changes to my firewall permissions.

Discussion in 'Security and Privacy' started by Whiskeyman, 2006/03/21.

  1. 2006/03/21
    Whiskeyman Lifetime Subscription

    Whiskeyman Inactive Alumni Thread Starter

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    I have installed WinXP Home SP2 and Office 2000. They are fully updated. I am using Panda Titanium 2006. These are Panda's firewall permission settings. I have changed Telnet, Messenger, NetMeeting and NetBios to No connection. Could you suggest any other changes I should make. I don't use IM programs, I am not on a network and have no use for remotely connecting to another computer (RDP). Thanks.

    WinZip WINZIP32.EXE Outbound
    Windows NetMeeting conf.exe No connection
    Windows NT Logon Application winlogon.exe Outbound
    Windows NT Base API Client DLL Kernel32.dll Outbound
    Windows Movie Maker moviemk.exe Outbound
    Windows Messenger msmsgs.exe No connection
    Windows Explorer explorer.exe Outbound
    Trivial File Transfer Protocol App tftp.exe Outbound
    TCPIP Finger Command finger.exe Outbound
    TCP/IP Traceroute Commnd tracert.exe Outbound
    TCP/IP Route Command route.exe Outbound
    TCP/IP Remote Shell Command rsh.exe Outbound
    TCP/IP Remote Exec Command rexec.exe Outbound
    TCP/IP Remote Copy Command rcp.exe Outbound
    TCP/IP Ping Command ping.exe Outbound
    TCP/IP NetBios Information nbstat.exe No connection
    TCP/IP Arp Command arp.exe Outbound
    TAPI 3.0 Dialer and IP Multicast Conference dialer.exe Outbound
    Spooler SubSystem App SPOOLSV.EXE Inbound and Outbound
    Services and Controller app SERVICES.EXE Inbound and Outbound
    Schedule service command line interface at.exe Outbound
    POWERPNT.EXE Outbound
    NT Kernel System ntoskrnl.exe Outbound
    nslookup APP NSLOOKUP.EXE Outbound
    NetFlt NETFLT.SYS Inbound and Outbound
    Net Command net.exe Outbound
    Net Command net1.exe Outbound
    Mutlicast Information mrinfo.exe Outbound
    Microsoft Publisher 2000 Version 6.0 MSPUB.EXE Outbound
    Microsoft Word for Windows WINWORD.EXE Outbound
    Microsoft Telnet Client telnet.exe No connection
    Microsoft Synchronization Manager Outbound
    Microsoft RSVP rsvp.exe Inbound and Outbound
    Microsoft Excel for Windows EXCEL.EXE Outbound
    Microsoft Connection Manager Auto-Download cmdl32.exe Outbound
    Microsoft Access for Windows MSACCESS.EXE Outbound
    LSA Shell (Export Version) LSASS>EXE Inbound and Outbound
    Internet Explorer IEXPLORE.EXE Inbound and Outbound
    Hyper Terminal Applet hypertem.exe Outbound
    Hostname hostname.exe Outbound
    Generic Host Process for Win32 Services svhost.exe Outbound
    File Transfer Program FTP.EXE Inbound and Outbound
    Client Server Runtime Process Outbound

    Other programs on the list are for my anti-virus (Panda) and Opera. All Outbound.
     
    Last edited: 2006/03/21
  2. 2006/03/21
    Welshjim

    Welshjim Inactive

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    Whiskeyman--Your list and mine are very dissimilar, so I doubt I can give you specific advice. (For example, I cannot think why I would want WinZip, MovieMaker, PowerPoint, etc. to have permanent access, even though I know they are perfectly legitimate programs. Perhaps for Updates? They send me emails.)
    I created my firewall list a bit by logic and a bit by trial and error.
    The logic was for programs like Outlook Express, Internet Explorer, etc., which I knew needed access.
    My firewall (Zone Alarm) produced a popup the first time any program asked for permission to access the Internet. When that request was made, I often "denied" if I was not sure and saw what happened (and/or checked Google to see what the requesting app was). If a desired action was blocked, then I knew I must either allow (some times just for that request; sometime permanently) or decide if I felt the app really needed to have access. If not, I would block it and often permanently. In the latter case I, of course, got no more requests from that app.
    With time I built up a list of permissions and denials that seem to cause minimum problems or requests.
    In your case, you could start from scratch by setting everything except the obvious to force a request. Then with time you could redecide whether to allow or deny and whether to make it permanent or not.
    Sorry for being so longwinded.
     

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  4. 2006/03/21
    Whiskeyman Lifetime Subscription

    Whiskeyman Inactive Alumni Thread Starter

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    I had Panda set to automatically decide. I usually switch it so I can manually set permissions. I can't see why Office programs need permission to access the net either. My biggest confusion is the WinXP applications. I have been Googling some of these programs but MS in their infinite wisdom have worded the descriptions quite vaguely. I have also searched for a guide such as Startup lists with no luck. 98SE didn't have all of these seemingly unnecessary programs. Thanks for the insight.
     
  5. 2006/03/21
    Whiskeyman Lifetime Subscription

    Whiskeyman Inactive Alumni Thread Starter

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    My permissions are now set as the following. Can anyone see further changes that should be made?

    WinZip WINZIP32.EXE No connection
    Windows NetMeeting conf.exe No connection
    Windows NT Logon Application winlogon.exe Outbound
    Windows NT Base API Client DLL Kernel32.dll Outbound
    Windows Movie Maker moviemk.exe No connection
    Windows Messenger msmsgs.exe No connection
    Windows Explorer explorer.exe Outbound
    Trivial File Transfer Protocol App tftp.exe No connection
    TCPIP Finger Command finger.exe Outbound
    TCP/IP Traceroute Commnd tracert.exe Outbound
    TCP/IP Route Command route.exe No connection
    TCP/IP Remote Shell Command rsh.exe No connection
    TCP/IP Remote Exec Command rexec.exe No connection
    TCP/IP Remote Copy Command rcp.exe No connection
    TCP/IP Ping Command ping.exe Outbound
    TCP/IP NetBios Information nbstat.exe No connection
    TCP/IP Arp Command arp.exe Outbound
    TAPI 3.0 Dialer and IP Multicast Conference dialer.exe No connection
    Spooler SubSystem App SPOOLSV.EXE No connection
    Services and Controller app SERVICES.EXE No connection
    Schedule service command line interface at.exe No connection
    POWERPNT.EXE No connection
    NT Kernel System ntoskrnl.exe Outbound
    nslookup APP NSLOOKUP.EXE Outbound
    NetFlt NETFLT.SYS Inbound and Outbound (Panda)
    Net Command net.exe No connection
    Net Command net1.exe No connection
    Mutlicast Information mrinfo.exe Outbound
    Microsoft Publisher 2000 Version 6.0 MSPUB.EXE No connection
    Microsoft Word for Windows WINWORD.EXE No connection
    Microsoft Telnet Client telnet.exe No connection
    Microsoft Synchronization Manager mobsync.exe No connection
    Microsoft RSVP rsvp.exe No connection
    Microsoft Excel for Windows EXCEL.EXE No connection
    Microsoft Connection Manager Auto-Download cmdl32.exe Outbound
    Microsoft Access for Windows MSACCESS.EXE No connection
    LSA Shell (Export Version) LSASS.EXE Outbound
    Internet Explorer IEXPLORE.EXE Outbound
    Hyper Terminal Applet hypertem.exe Outbound
    Hostname hostname.exe Outbound
    Generic Host Process for Win32 Services svhost.exe Outbound
    File Transfer Program FTP.EXE No connection
    Client Server Runtime Process Outbound
     
  6. 2006/03/21
    Welshjim

    Welshjim Inactive

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    Whiskeyman--
    Like which?
    As you can see my approach was very amateurish.
    Delete these WinXP applications from your list. (Not "deny access ".) That should require Panda to ask the next time they ask for permission. That will give you the chance to see how often the request is made and what the result of denying is.
     
  7. 2006/03/21
    phkhgh

    phkhgh Inactive

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    Whiskeyman,
    You're right - the Windows components are a little trickier / harder to understand what some do or if they need internet access. If you disable or disallow access for some windows XP "services" then other programs may not work correctly if they need those windows components to access the web.

    As for other programs, like WinZip, Win Movie Maker, Power Point, or a host of other programs like Adobe Reader, Excel or just about any software you load nowdays, in general they don't need internet access. Exceptions to that are when you need / want updates - then you can allow it manually. Some apps have the help button on the toolbar linked to online help pages. I think it's becoming more common for the developers to use this to try and cut down on software piracy by have the program phone home.
     
  8. 2006/03/22
    charlesvar

    charlesvar Inactive Alumni

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  9. 2006/03/22
    Whiskeyman Lifetime Subscription

    Whiskeyman Inactive Alumni Thread Starter

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    Thanks. I have look in those lists, but many of the programs listed in the firewall are not shown. It would be nice to have a guide dealing with the common programs that usually show up in the firewall to determine what the recommended settings should be. I spent most of yesterday searching the net and found little to clarify what these programs' needs are accessing the Internet. I have been setting No connection on a few at a time then checking out how my computer runs and haven't found any issues yet. I just don't want to disable something then find out later on down the road I messed up.

    I have discovered that many of the programs listed are used if you are on a network which I am not. I also am not concerned with remotely connecting to another computer. I don't allow programs to automatically update. All of the sites I go to provide a decent listing of new updates for all of the programs I use. I check Windows Update at the end of every month. I wait to see if others experience problems with the newest updates before I install them.

    As for Office, this is the first time I have installed 2000. I have always used Office 97 on my 98SE setup. I would only installed Excel and Word though seeing as they were the most used by me.

    This is the first time that I have had Panda assign Inbound and Outbound permissions to so many programs automatically. I didn't know if this was due to install procedures. It seems like MS whats to know too much about what is going on with XP.
     
  10. 2006/03/22
    Welshjim

    Welshjim Inactive

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    Whiskeyman--Playing with XP Services is not for the uninformed. The BlackViper site, which recommended agressive changes, is now down. The ElderGeek also has a site with some recommendations and some good information about Services
    http://www.theeldergeek.com/services_guide.htm
    But even he really suggests leaving the defaults alone unless you know what you are doing. With a modern PC and reasonable size hard drive, you save very little by picking and choosing among the Services unless it is clear that you do not have that function installed.
    Anyway little of this will help you make decisions on what should be allowed to have internet access from your firewall. That is a different issue than what is needed to start at boot.
     
  11. 2006/03/22
    charlesvar

    charlesvar Inactive Alumni

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    Hi Whiskeyman,

    As a general rule:

    I don't allow any program - XP's or apps - server privilages which allows them to open a port and listen for communications. The only apps that I know that need that ability are IM apps.

    I don't know what Panda calls that though, I run ZA pro and it is called "act as server" and in Kerio (new Sunbelt version) its "allow in" option.

    If you deny out, my experience has been that if needed, you'll find out fairly quickly.

    Some apps simply want to "check for updates" - one example on my system is Roxio when I use it to burn and I permantly deny that. Sonic, another burner is especially notorious - the updater is a startup :rolleyes:

    You can test whether your ports are closed/stealthed here: https://www.grc.com/x/ne.dll?bh0bkyd2

    Regards - Charles
     
  12. 2006/03/22
    Whiskeyman Lifetime Subscription

    Whiskeyman Inactive Alumni Thread Starter

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    The GRC scan always shows True Stealthed and NetBios shows up as non-existent.

    [Edit]

    The GRC deal got me thinking. I searched my Security sites bookmarks and remembered that PC Flank had more robust scanning features. I decided to look at that different scanning programs and I found something that determines what firewall permissions should be assigned to differennt programs.

    Recommended Firewall Rulesets
     
    Last edited: 2006/03/22
  13. 2006/03/22
    Welshjim

    Welshjim Inactive

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    Whiskeyman--Looks like an interesting site. Thanks.
     
  14. 2006/03/22
    charlesvar

    charlesvar Inactive Alumni

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    Hi Whiskeyman,

    I just tested the PC Flank ruleset site.

    I may be doing something wrong, but it seems incomplete. I looked for search engines and the only one it came up with is copernic - google isn't there.

    Those that did come up like the ones for the Browsers show allow out and block in, blocking in is disabling the "act as server" which I referred to.

    Some more about how I treat this issue:
    If I would run an app like a search engine all the time, I would allow out automatically after creating the initial rule. But I don't run Google all the time, I start it when I need it, and my outbound FW rule for it is to ask; Jim alluded to this in one of his posts - wanting to know when and why an app would want internet access.

    Complicating this is that I run HostIntrustionPrevention type application/FW options:

    System Safety Monitor http://syssafety.com/home.html which is a software (including the OS) behavior control app and both Kerio and ZA Pro have these features.

    Don't know if Panda has that kind of feature, I think it probably does.

    Regards - Charles
     
    Last edited: 2006/03/22
  15. 2006/03/22
    Welshjim

    Welshjim Inactive

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    Whiskeyman--I, too, have now tried the Flank RuleTest site.
    I find very few entries in my Zone Alarm firewall Program Control list are recognized by the site when I enter info into the Search button line. I have tried entering both the Name of the process (as reported by ZA--like Windows Explorer) and the File involved (like explorer.exe).
    Using the Show line gives more info, but seldom on the apps I am looking for.
    But, as charlesvar has said, maybe I am doing something wrong.
    Are you getting any good info from the Flank site to answer your original question ?
    -------------------------------------------------
    In ZA free, there are four columns for blocking settings. Two are for "Access" (for sites in Internet and Trusted zones) and two are to "Act as Server" ( again for sites in Internet and Trusted zones).
    I have only two programs set to act as Server--Skype and svchost.exe (only for Trusted Sites). Skype will not work unless allowed to act as server.
    I have about 40 programs allowed Access. Most are for various Symantec AV functions. Some of the others are IE, OE, MSAntiSpyware (Windows Defender), AdAware, tracert, ping, rundll32.exe, etc.

    I use Google extensively, but it is not in my ZA Program Control list.
     
    Last edited: 2006/03/22
  16. 2006/03/22
    charlesvar

    charlesvar Inactive Alumni

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    Well it wouldn't be, it was a bad example to use, there isn't anything that's running on the system, while with copornic there is. Sorry about that.

    Regards - Charles
     
  17. 2006/03/22
    Whiskeyman Lifetime Subscription

    Whiskeyman Inactive Alumni Thread Starter

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    I only found a few entries at PC Flank. I asked someone at another site what his recommendations were. He stated that what I wanted was a list for applications filters not firewall.:rolleyes:
     
  18. 2006/03/22
    Welshjim

    Welshjim Inactive

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    Whiskeyman--
    ???
    Perhaps you should reconsider my first post. I do not think any site can tell you what makes sense for you.
     
  19. 2006/03/23
    Whiskeyman Lifetime Subscription

    Whiskeyman Inactive Alumni Thread Starter

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    I finally got it set. I could not find one place with all of the inforamtion regarding these programs. I just kept Googling and reading then set my permissions. Any program that is considered a security risk I set to No connection and the rest except Panda were set to Outbound. Once that was done I reset Panda's firewall to automatic and my settings are staying as I want.

    This morning as I went to open my favorite tech sites in Opera the computer rebooted and stated One of your disks needs to be checked for consistency. I thought one of my settings messed things up. It took 3 times with this wanting to scan before it came up with a problem with Opera and corrected it. It must have occurred when I updated to the new version.

    I am finding XP to be quite different than 98SE. It's a lot of fun trying to figure it all out. I do like System Restore.:D
     
  20. 2006/03/23
    charlesvar

    charlesvar Inactive Alumni

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    I like it to, once you understand it what it can do and its limits. Up until about a year ago when I got a drive imaging, SR was what I relied on and did quite well with it.

    If you ever have a question about it, there are a lot of threads on it here :)

    Regards - Charles
     
  21. 2006/03/23
    Whiskeyman Lifetime Subscription

    Whiskeyman Inactive Alumni Thread Starter

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    I have been setting custom restore points as I add programs. That way if an issue occurs I can go back before the install. My main custom restore points were after installing XP SP2, Windows Updates, Office 2000 plus updates and most used programs (AV, Opera, AdAware and SpywareBlaster). After those I created ones for the printer installation and batches of additional downloaded programs.
     

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