Viruses and PCs within a Network

I am the only Mac person in a network of PCs in an office with a server and a number of PCs. I don't really use the network except to access the internet through an ethernet cable from a DSL line, but with the Ethernet cable hooked up to my computer I can see the network (Finder -> Shared). They are all password protected so I cannot get into them anyway. This may or may not be relevant.
A computer virus attacked our network that really messed with a number of the PCs, "erasing" harddrives etc. Even though my Mac is totally fine, and I expect it to stay fine, The question I have is: Could I have downloaded the virus someway and spread it through my mac to the network, even though I myself am not infected?
roger
thanks
roger

the only way this could have happened if you had an infected file or an email and you passed along. so if somebody sends you an email with a PC virus and you forward it to a person on a PC, that PC will get infected. same with a virus infected file. if you download one from internet somehow and then send this file to a PC user then that PC will get infected. However a PC virus that you get from email or by downloading won't spread from your computer by itself. You have to actively help it.

Similar Messages

How to set up full access and limited access wireless networks to laptops

Dear Apple,
I just received my Apple 1 TB Time Capsule. Can someone please help me with a network configuration I want to set up?
I have a cable modem, and, three computers: a G4 iMAC (system 10.5.5), an Apple MacBook (system 10.5.5), and, a PC laptop.
The Time Capsule is connect directly to the cable modem.
Regarding the computers:
(1) I want the G4 iMAC to connect directly, via an Ethernet cable, to the Time Capsule, WITH FULL ALLOWED ACCESS to the Time Capsule and to the back-up function of the Time Machine feature, and, with allowed access to my HP inkjet printer (class 6110);
(2) I also want the MacBook laptop to wirelessly link to the Time Capsule via the Airport utility on the laptop, and, WITH FULL ALLOWED ACCESS to the Time Capsule and to the back-up function of the Time Machine feature (using WPA/WPA2 security, and, without the network name visible to third parties), and, WITH allowed access to my HP inkjet printer (class 6110);
(3) I want the PC laptop to wirelessly link to the Time Capsule (using WEP security), but WITHOUT ACCESS to the Time Machine, WITHOUT access to the back-ups on the iMAC, WITHOUT access to the back-ups on the MacBook, and, WITHOUT access to the inkjet printer --- I only want the PC to use the Time Capsule as a WIRELESS ROUTER so that the PC laptop can access the internet.
(4) And, finally, I want to specify (Time-Capsule/Time-Machine/server ) access ONLY to the iMAC and the MacBook, so that others cannot gain any access.
I specifically need help to set up and configure the Time Capsule so that the PC laptop, as stated above, should have limited access to the Time Capsule --- namely, only to access the internet, and, not even be aware of stored data on the Time Capsule, not even be aware of the inkjet printer, and, not even see my WPA network name when the PC scans for wireless devices.
I also want the iMAC and the MacBook to have access to each other’s data stored on the Time Capsule (like a common server).
I have an old D-Link DI-624 wireless router that I used before buying the Time Capsule, which is available, if needed. Hopefully, I can configure the Time Capsule so that I would not need the old D-Link.
Thank you in advance,
David.

The basic method for remote access is not changed.
http://gigaom.com/apple/access-your-time-capsule-over-the-internet/
You have a few issues.
The really big one.. the school firewall should not let you connect to home.
Check the IT admin at your school but if they allow anything but a few protocols like http and https through, they are not doing their job. You cannot afford in a large network to have every Tom Dick and Harry access any open device.. that can introduce viruses and trojans into the network behind the firewall.
The general method for remote access on large networks is vpn and the TC offers no vpn connection.. just AFP.
If you intend using 3G wireless stick or the like then you can get access.
The next issue is static public IP or how to find the TC.. you need some way to find the IP if your ISP does not offer static ip, and the tc has no dyndns client. Since Apple shut down new users for mobileme and will close that service there is no method to find the TC IP without owning your own domain. You would be better placing the TC in bridge behind a router that does offer dyndns and port forward AFP (TCP 548) to it.

Cannot see printer and PCs on network

I have a G5 connected through Airport to a Netgear WGR614 v4 router which is connected in turn to a cable modem. There are also two PCs and a wireless printer (HP Officejet 7410) on the network.
The PCs and printer function correctly. The G5 is able to access the Internet through Airport, the router and the cable modem. The router settings confirm that the G5 is an "attached device".
However the G5 doesn't seem to be able to see anything else on the network. When I try to look at the network from within Finder all I see is one server corresponding to my G5. Do I need to do something to Network Preferences to make the printer and PCs visible to the G5?
iMAC G5 Mac OS X (10.4.3)

I seem to have resolved this, at least as far as accessing the printer is concerned, by installing HP's software on the PC part of the network first, and only subsequently on the G5. It now seems to work.
I'm still unclear about how Finder works as far as showing me what is on the network. I'd expected it to work like Windows Explorer on XP and be able to show me everything on the network. However it doesn't seem to do this. Is this a problem with my setup, or a misunderstanding about how Finder works with regard to networks?
iMAC G5 Mac OS X (10.4.3)

How do I prevent other Mac users from changing my Airport Extreme Network Name and Password within the Airport Utility?

How do I prevent other Mac users from changing my Airport Extreme Network Name and Password within the Airport Utility? My company is using an Airport Extreme in our office now and I want to prevent other employees from messing with the network/settings. Is there a way to place a password on the settings to allow only the admin to access the network name and password?

Hi - you have will have to change the device passwords on all the base stations and then don't give them to anyone except the administrators and tell them not to save them on their computers that use the older versions of the Airport Utility - for the newer versions like the mobile apps, as soon as you enter the pasword it is saved and is visible in the advanced pane along with the network password - so if anyone gets a hold of your iPad or iPhone, they can edit the whole network - I have this same issue with my networks in the office and it is inconvenient but doable - I hope this helps

Hi looking for a bit of free anti - virus and firewall for osx 10.8.2

hi looking for a bit of free anti - virus and firewall for osx 10.8.2 any pointers also any one used Mac cleaner ?

1. This comment applies to malicious software ("malware") that's installed unwittingly by the victim of a network attack. It does not apply to software, such as keystroke loggers, that may be installed deliberately by an intruder who has hands-on access to the victim's computer. That threat is in a different category, and there's no easy way to defend against it. If you have reason to suspect that you're the target of such an attack, you need expert help.
2. All versions of OS X since 10.6.7 have been able to detect known Mac malware in downloaded files. This feature is transparent to the user, but internally Apple calls it "XProtect." The recognition database is automatically updated once a day; however, you shouldn't rely on it, because the attackers are always at least a day ahead of the defenders.
The following caveats apply to XProtect:
It can be bypassed by some third-party networking software, such as BitTorrent clients and Java applets (see below.)
It only applies to software downloaded from the network. Software installed from a CD or other media is not checked.
3. Starting with OS X 10.7.5, there has been another layer of built-in malware protection, designated "Gatekeeper" by Apple. By default, applications and Installer packages downloaded from the network will only run if they're digitally signed by a developer with a certificate issued by Apple. Software certified in this way hasn't actually been tested by Apple (unless it comes from the Mac App Store), but you can be reasonably sure that it hasn't been modified by anyone other than the developer. His identity is known to Apple, so he could be held legally responsible if he distributed malware. For most practical purposes, applications recognized by Gatekeeper as signed can be considered safe.
Gatekeeper has, however, the same limitations as XProtect, and in addition the following:
It can easily be disabled or overridden by the user.
A malware attacker could get control of a code-signing certificate under false pretenses, or could find some other way to evade Apple's controls.
For more information about Gatekeeper, see this Apple Support article.
4. Beyond XProtect and Gatekeeper, there’s no benefit, in most cases, from any other automated protection against malware. The first and best line of defense is always your own intelligence. All known malware circulating on the Internet that affects a fully-updated installation of OS X 10.6 or later takes the form of so-called "trojan horses," which can only have an effect if the victim is duped into running them. The threat therefore reduces to a battle of wits between you and the malware attacker. If you're smarter than he thinks you are, you'll win.
That means, in practice, that you never use software that comes from an untrustworthy source. How do you know whether a source is trustworthy?
Any website that prompts you to install a “codec,” “plug-in,” or “certificate” that comes from that same site, or an unknown one, is untrustworthy.
A web operator who tells you that you have a “virus,” or that anything else is wrong with your computer, or that you have won a prize in a contest you never entered, is trying to commit a crime with you as the victim. (Some reputable websites did legitimately warn users who were infected with the "DNSChanger" malware. That exception to this rule no longer applies.)
“Cracked” copies of commercial software downloaded from a bittorrent are likely to be infected.
Software with a corporate brand, such as Adobe Flash Player, must be downloaded directly from the developer’s website. No intermediary is acceptable.
5. Java on the network (not to be confused with JavaScript, to which it's not related) is a weak point in the security of any operating system. If a Java web plugin is not installed, don't install one unless you really need it. If it is installed, you should disable it (not JavaScript) in your web browsers. Few websites have Java content nowadays, so you won’t be missing much. This setting is mandatory in OS X 10.5.8 or earlier, because Java in those obsolete versions has known security flaws that make it unsafe to use on the Internet. The flaws will never be fixed. Regardless of version, experience has shown that Java can never be fully trusted, even if no vulnerabilities are publicly known at the moment.
Follow these guidelines, and you’ll be as safe from malware as you can reasonably be.
6. Never install any commercial "anti-virus" or "Internet security" products for the Mac, as they all do more harm than good. If you need to be able to detect Windows malware in your files, use the free software ClamXav — nothing else.
Why shouldn't you use commercial "anti-virus" products?
Their design is predicated on the nonexistent threat that malware may be injected at any time, anywhere in the file system. Malware is downloaded from the network; it doesn't materialize from nowhere.
In order to meet that nonexistent threat, the software modifies or duplicates low-level functions of the operating system, which is a waste of resources and a common cause of instability, bugs, and poor performance.
By modifying the operating system, the software itself may create weaknesses that could be exploited by malware attackers.
7. ClamXav doesn't have these drawbacks. That doesn't mean it's entirely safe. It may report email messages that have "phishing" links in the body, or Windows malware in attachments, as infected files, and offer to delete or move them. Doing so can corrupt the Mail database. The messages should be deleted from within the Mail application.
ClamXav is not needed, and should not be relied upon, for protection against OS X malware. It's useful only for detecting Windows malware. If you don't need to do that, avoid it. Windows malware can't harm you directly (unless, of course, you use Windows.) Just don't pass it on to anyone else.
8. The greatest danger posed by anti-virus software, in my opinion, is its effect on human behavior. When people install such software, which does little or nothing to protect them from emerging threats, they get a false sense of security from it, and then they may do things that make them more vulnerable. Nothing can lessen the need for safe computing practices.
9. It seems to be a common belief that the built-in Application Firewall acts as a barrier to infection, or prevents malware from functioning. It does neither. It blocks inbound connections to certain network services you're running, such as file sharing. It's disabled by default and you should leave it that way if you're behind a router on a private home or office network. Activate it only when you're on an untrusted network, for instance a public Wi-Fi hotspot, where you don't want to provide services. Disable any services you don't use.

Best virus and hacker protection for mac book pro?

What is the best protection for my back book pro against hackers and virus?

Mac users often ask whether they should install "anti-virus" software. The answer usually given on ASC is "no." The answer is right, but it may give the wrong impression that there is no threat from what are loosely called "viruses." There is a threat, and you need to educate yourself about it.
1. This is a comment on what you should—and should not—do to protect yourself from malicious software ("malware") that circulates on the Internet and gets onto a computer as an unintended consequence of the user's actions. It does not apply to software, such as keystroke loggers, that may be installed deliberately by an intruder who has hands-on access to the computer, or who has been able to take control of it remotely. That threat is in a different category, and there's no easy way to defend against it.
The comment is long because the issue is complex. The key points are in sections 5, 6, and 10.
OS X now implements three layers of built-in protection specifically against malware, not counting runtime protections such as execute disable, sandboxing, system library randomization, and address space layout randomization that may also guard against other kinds of exploits.
2. All versions of OS X since 10.6.7 have been able to detect known Mac malware in downloaded files, and to block insecure web plugins. This feature is transparent to the user. Internally Apple calls it "XProtect."
The malware recognition database used by XProtect is automatically updated; however, you shouldn't rely on it, because the attackers are always at least a day ahead of the defenders.
The following caveats apply to XProtect:
☞ It can be bypassed by some third-party networking software, such as BitTorrent clients and Java applets.
☞ It only applies to software downloaded from the network. Software installed from a CD or other media is not checked.
As new versions of OS X are released, it's not clear whether Apple will indefinitely continue to maintain the XProtect database of older versions such as 10.6. The security of obsolete system versions may eventually be degraded. Security updates to the code of obsolete systems will stop being released at some point, and that may leave them open to other kinds of attack besides malware.
3. Starting with OS X 10.7.5, there has been a second layer of built-in malware protection, designated "Gatekeeper" by Apple. By default, applications and Installer packages downloaded from the network will only run if they're digitally signed by a developer with a certificate issued by Apple. Software certified in this way hasn't necessarily been tested by Apple, but you can be reasonably sure that it hasn't been modified by anyone other than the developer. His identity is known to Apple, so he could be held legally responsible if he distributed malware. That may not mean much if the developer lives in a country with a weak legal system (see below.)
Gatekeeper doesn't depend on a database of known malware. It has, however, the same limitations as XProtect, and in addition the following:
☞ It can easily be disabled or overridden by the user.
☞ A malware attacker could get control of a code-signing certificate under false pretenses, or could simply ignore the consequences of distributing codesigned malware.
☞ An App Store developer could find a way to bypass Apple's oversight, or the oversight could fail due to human error.
Apple has taken far too long to revoke the codesigning certificates of some known abusers, thereby diluting the value of Gatekeeper and the Developer ID program. Those lapses don't involve App Store products, however.
For the reasons given, App Store products, and—to a lesser extent—other applications recognized by Gatekeeper as signed, are safer than others, but they can't be considered absolutely safe. "Sandboxed" applications may prompt for access to private data, such as your contacts, or for access to the network. Think before granting that access. Sandbox security is based on user input. Never click through any request for authorization without thinking.
4. Starting with OS X 10.8.3, a third layer of protection has been added: a "Malware Removal Tool" (MRT). MRT runs automatically in the background when you update the OS. It checks for, and removes, malware that may have evaded the other protections via a Java exploit (see below.) MRT also runs when you install or update the Apple-supplied Java runtime (but not the Oracle runtime.) Like XProtect, MRT is effective against known threats, but not against unknown ones. It notifies you if it finds malware, but otherwise there's no user interface to MRT.
5. The built-in security features of OS X reduce the risk of malware attack, but they are not, and never will be, complete protection. Malware is a problem of human behavior, not machine behavior, and no technological fix alone is going to solve it. Trusting software to protect you will only make you more vulnerable.
The best defense is always going to be your own intelligence. With the possible exception of Java exploits, all known malware circulating on the Internet that affects a fully-updated installation of OS X 10.6 or later takes the form of so-called "Trojan horses," which can only have an effect if the victim is duped into running them. The threat therefore amounts to a battle of wits between you and Internet criminals. If you're better informed than they think you are, you'll win. That means, in practice, that you always stay within a safe harbor of computing practices. How do you know when you're leaving the safe harbor? Below are some warning signs of danger.
Software from an untrustworthy source
☞ Software with a corporate brand, such as Adobe Flash Player, doesn't come directly from the developer’s website. Do not trust an alert from any website to update Flash, or your browser, or any other software. A genuine alert that Flash is outdated and blocked is shown on this support page. Follow the instructions on the support page in that case. Otherwise, assume that the alert is fake and someone is trying to scam you into installing malware. If you see such alerts on more than one website, ask for instructions.
☞ Software of any kind is distributed via BitTorrent, or Usenet, or on a website that also distributes pirated music or movies.
☞ Rogue websites such as Softonic, Soft32, and CNET Download distribute free applications that have been packaged in a superfluous "installer."
☞ The software is advertised by means of spam or intrusive web ads. Any ad, on any site, that includes a direct link to a download should be ignored.
Software that is plainly illegal or does something illegal
☞ High-priced commercial software such as Photoshop is "cracked" or "free."
☞ An application helps you to infringe copyright, for instance by circumventing the copy protection on commercial software, or saving streamed media for reuse without permission. All "YouTube downloaders" are in this category, though not all are necessarily malicious.
Conditional or unsolicited offers from strangers
☞ A telephone caller or a web page tells you that you have a “virus” and offers to help you remove it. (Some reputable websites did legitimately warn visitors who were infected with the "DNSChanger" malware. That exception to this rule no longer applies.)
☞ A web site offers free content such as video or music, but to use it you must install a “codec,” “plug-in,” "player," "downloader," "extractor," or “certificate” that comes from that same site, or an unknown one.
☞ You win a prize in a contest you never entered.
☞ Someone on a message board such as this one is eager to help you, but only if you download an application of his choosing.
☞ A "FREE WI-FI !!!" network advertises itself in a public place such as an airport, but is not provided by the management.
☞ Anything online that you would expect to pay for is "free."
Unexpected events
☞ A file is downloaded automatically when you visit a web page, with no other action on your part. Delete any such file without opening it.
☞ You open what you think is a document and get an alert that it's "an application downloaded from the Internet." Click Cancel and delete the file. Even if you don't get the alert, you should still delete any file that isn't what you expected it to be.
☞ An application does something you don't expect, such as asking for permission to access your contacts, your location, or the Internet for no obvious reason.
☞ Software is attached to email that you didn't request, even if it comes (or seems to come) from someone you trust.
I don't say that leaving the safe harbor just once will necessarily result in disaster, but making a habit of it will weaken your defenses against malware attack. Any of the above scenarios should, at the very least, make you uncomfortable.
6. Java on the Web (not to be confused with JavaScript, to which it's not related, despite the similarity of the names) is a weak point in the security of any system. Java is, among other things, a platform for running complex applications in a web page, on the client. That was always a bad idea, and Java's developers have proven themselves incapable of implementing it without also creating a portal for malware to enter. Past Java exploits are the closest thing there has ever been to a Windows-style virus affecting OS X. Merely loading a page with malicious Java content could be harmful.
Fortunately, client-side Java on the Web is obsolete and mostly extinct. Only a few outmoded sites still use it. Try to hasten the process of extinction by avoiding those sites, if you have a choice. Forget about playing games or other non-essential uses of Java.
Java is not included in OS X 10.7 and later. Discrete Java installers are distributed by Apple and by Oracle (the developer of Java.) Don't use either one unless you need it. Most people don't. If Java is installed, disable it—not JavaScript—in your browsers.
Regardless of version, experience has shown that Java on the Web can't be trusted. If you must use a Java applet for a task on a specific site, enable Java only for that site in Safari. Never enable Java for a public website that carries third-party advertising. Use it only on well-known, login-protected, secure websites without ads. In Safari 6 or later, you'll see a padlock icon in the address bar when visiting a secure site.
Stay within the safe harbor, and you’ll be as safe from malware as you can practically be. The rest of this comment concerns what you should not do to protect yourself.
7. Never install any commercial "anti-virus" (AV) or "Internet security" products for the Mac, as they are all worse than useless. If you need to be able to detect Windows malware in your files, use one of the free security apps in the Mac App Store—nothing else.
Why shouldn't you use commercial AV products?
☞ To recognize malware, the software depends on a database of known threats, which is always at least a day out of date. This technique is a proven failure, as a major AV software vendor has admitted. Most attacks are "zero-day"—that is, previously unknown. Recognition-based AV does not defend against such attacks, and the enterprise IT industry is coming to the realization that traditional AV software is worthless.
☞ Its design is predicated on the nonexistent threat that malware may be injected at any time, anywhere in the file system. Malware is downloaded from the network; it doesn't materialize from nowhere. In order to meet that nonexistent threat, commercial AV software modifies or duplicates low-level functions of the operating system, which is a waste of resources and a common cause of instability, bugs, and poor performance.
☞ By modifying the operating system, the software may also create weaknesses that could be exploited by malware attackers.
☞ Most importantly, a false sense of security is dangerous.
8. An AV product from the App Store, such as "ClamXav," has the same drawback as the commercial suites of being always out of date, but it does not inject low-level code into the operating system. That doesn't mean it's entirely harmless. It may report email messages that have "phishing" links in the body, or Windows malware in attachments, as infected files, and offer to delete or move them. Doing so will corrupt the Mail database. The messages should be deleted from within the Mail application.
An AV app is not needed, and cannot be relied upon, for protection against OS X malware. It's useful, if at all, only for detecting Windows malware, and even for that use it's not really effective, because new Windows malware is emerging much faster than OS X malware.
Windows malware can't harm you directly (unless, of course, you use Windows.) Just don't pass it on to anyone else. A malicious attachment in email is usually easy to recognize by the name alone. An actual example:
London Terror Moovie.avi [124 spaces] Checked By Norton Antivirus.exe
You don't need software to tell you that's a Windows trojan. Software may be able to tell you which trojan it is, but who cares? In practice, there's no reason to use recognition software unless an organizational policy requires it. Windows malware is so widespread that you should assume it's in every email attachment until proven otherwise. Nevertheless, ClamXav or a similar product from the App Store may serve a purpose if it satisfies an ill-informed network administrator who says you must run some kind of AV application. It's free and it won't handicap the system.
The ClamXav developer won't try to "upsell" you to a paid version of the product. Other developers may do that. Don't be upsold. For one thing, you should not pay to protect Windows users from the consequences of their choice of computing platform. For another, a paid upgrade from a free app will probably have all the disadvantages mentioned in section 7.
9. It seems to be a common belief that the built-in Application Firewall acts as a barrier to infection, or prevents malware from functioning. It does neither. It blocks inbound connections to certain network services you're running, such as file sharing. It's disabled by default and you should leave it that way if you're behind a router on a private home or office network. Activate it only when you're on an untrusted network, for instance a public Wi-Fi hotspot, where you don't want to provide services. Disable any services you don't use in the Sharing preference pane. All are disabled by default.
10. As a Mac user, you don't have to live in fear that your computer may be infected every time you install software, read email, or visit a web page. But neither can you assume that you will always be safe from exploitation, no matter what you do. Navigating the Internet is like walking the streets of a big city. It can be as safe or as dangerous as you choose to make it. The greatest harm done by security software is precisely its selling point: it makes people feel safe. They may then feel safe enough to take risks from which the software doesn't protect them. Nothing can lessen the need for safe computing practices.

Host based Anti-Virus and Cisco Security

Hello Everyone,
Happy Friday. I was wondering if there are any advantages to using 1 brand of anti-virus on PCs and servers as relates to Cisco Security. I know Symantec is soemthing of a competitor as opposed to Trend and Cisoc even uses Trend signature in some of their devices. I personally have a likeing for SYmantec as far as AV goes but if there is an advantage that is easily explited by a Cisco network of using something else I would like to know about it.
Thanks in advnace. All replies rated.

Hello angel-moon,
If you are talking about host based security then Cisco provides CSA,which is an extensive Host based IPS + Antivirus tool
http://www.cisco.com/univercd/cc/td/doc/product/vpn/ciscosec/csa/csa52/index.htm
hope it helps !

My iMac with Leopard does not see Vista PCs on the network

My iMac with Leopard cannot see any of my Vista PCs on my network. I have an older G5 iMac (tiger) and the Leopard system see that one just fine. My older G5 sees my Leopard mac and all of the Vista computers. I just want the Leopard mac to see the Vista computers. Please help.

I'm having the same problem. It was literally working one minute and not the next. I also had this issue with my MBP but it was never resolved. I can ping the vista machine but not connect to the folder structure. This is really annoying because my vista machine is acting as a server and I need to remote desktop from the iMac to the windows machine.
Any ideas people?

When trying to get updates it says that I am not conntected and to check my network. How do I fix this?

When trying to get an update, a message reads that it cannot connect and to check the network setting. I can get the internet, so I dont know how the fix this.

Temporarily turn off the anti-virus and firewall software on your PC before attempting to get the update

Accessing files within the Network

Hi
I have problem with file sharing. Within the network I have a PC with windows Vista. It has file sharing on. But it is not showing any files in my MAC. Can anyone tell me how to change the settings in my MAC to access files from my PC within the network.

Hi Avi,
Thanks for your reply.
Just to give to some background info. The java class is called from a package that is owned by the same schema. The schema owner is part of the dba_role and connect_role.
The network drive on the windows 2000 serveris mapped by the domain administrator account.
We have given permissions to the schema owner to access the mapped drive thru java.
What the java script does is fill a string array with the name of each file in the directory. The script and error messages are below.
I have a feeling that the schema account does not have windows 2000 permissions to access network resources, but it is just a hunch.
Regards,
Ned
public static String[] getDirList(String dir, String FilterExt)
System.out.println(dir + ' ' + FilterExt);
FilenameFilter filter= new FilterExt(FilterExt);
File DirList = new File(dir);
String f[] = DirList.list(filter);
System.out.println(f.length);
for (int i = 0; i < f.length; i++)
System.out.println(f.toString());
return f;
java.lang.NullPointerException
at ImpExpUtil.getDirList(IMPEXPUTIL.java:2254)
at AutoImpExp.getNewImportFile(AUTOIMPEXP.java:87)
at AutoImpExp.Import(AUTOIMPEXP.java:253)
at Tester.autoImportExport(TESTER.java:2135)

Macs can let virus enter in a Windows network?

We have 5 Mac in a Windows network. The IT states that the Mac (which are connected to the internet too) can let enter viruses and trojan horses and infect the windows network.
Is it true?

I agree. Your mac is no more or less susceptable to or likely to be a carrier of a virus than the windows or *nix boxes on the same network. Your Mac has or should have the exact same potential to be infected or to spread in fection that the other machines do.
The only way this policy makes sense is if youre machine isnt being "managed" by IT. meaning youre not behind the same firewall and youre not adhearing to the same security policies (not to be confused with policy objects in a windows domain but rather the rules IT lays down on users and computers). If you arent adhearing to these policies i agree with them. If you are then they are just being lazy/cheap and refusing to learn a system thats foreign to them or hire a consultant to do it for them.

Wine 1.0 rc1 and other versions not networking or finding any servers

Hi guys,
I am banging my head against the wall because i can't seem to solve my wine networking problem.
It just won't connect from any game to outside servers and i seem to be the only one with this problem.
I have compiled and installed Wine 1.0 rc 1, but the same problem occurs with 0.9.61 so it is NOT my wine
install. Been to IRC #archlinux and #winehq and no one seems to have this problem nor a possible solution to it.
I am using a static network connection and have tap/tun networking running for my virtual box install (well in a script for
when i start vbox), been also playing with the hosts config file as per wine wiki to no avail.
Arch Linux guru aka Wine master , if ur out there .... I really could use your help now
Even if someone could test if they got the same issue would be helpfull... post.
Greetz
Caved

Hey Procyon, thanks for your reply.
Wine is not the issue here, i have used local wine packages i saved from the past and were KNOWN to
network, and while wine is not perfect it is not the reason for the networking problem.
I have installed HalfLife 2 to test wine 1.0 rc1 itself and it runs perfectly as it always did.
Another testing is the custom kernel tailored to my system, it is an older .config of which i know to work
with wine networking in the past and i also tested this with a saved older kernel that i used a while back.
The fact that i can a) fully network in Arch Linux combined with b) fully networking within vbox(tun/tap),
c) mount and use every single share in my home network including the vbox shares leads me to beliefe
that there is absolutely nothing wrong with my networking settings nor my home network at all.
The only things i can think of that might be wrong is:
1) Arch Linux changed its internals for networking which may have introduced a bug that wasn't there
in previous versions.
2) My router downstairs is blocking the port that wine tries to use to connect to a server. (i checked the router
logs but found nothing strange here either)
Anyway i am still stuck with this issue /sigh
Not sure if this helps but when i run wine from a term i get the following msg when it tries to connect to a server:
WARNING: Trying to create a socket of type SOCK_RAW, this will fail unless you have special permissions.
Somewhat strange since my user has every permission to network....
Greetz
Caved
Last edited by caved (2008-05-15 06:51:09)

Node failed to join the cluster because it ould not send and receive failure detection network messages

One of my customers has a Windows Server 2008 R2 cluster for an Exchange 2010 Mailbox Database Availability Group. Lately, they've been having problems with one of their nodes (the one node that is on a different subnet in a different datacenter) where
their Exchange databases aren't replicating. While looking into this issue it seems that the problem is the Network Manager isn't started because the cluster service is failing. Since the issue seems to be with the cluster service, and not Exchange,
I'm asking here.
When the cluster service starts, it appears to start working, but within a few minutes the following is logged in the system event log.
FailoverClustering
1572
Critical
Cluster Virtual Adapter
Node 'nodename' failed to join the cluster because it could not send and receive failure detection network messages with other cluster nodes. ...
It seems that the problem is with the 169.254 address on the cluster virtual adapter. An entry in the cluster.log file says: Aborting connection because NetFT route to node nodename on virtual IP 169.254.1.44:~3343~ has failed to come up.
In my experience, you never have to mess with the cluster virtual adapter. I'm not sure what happened here, but I doubt it has been modified. I need the cluster to communicate with its other nodes on our routed 10. network. I've never experienced
this before and found little in my searches on the subject. Any idea how I can fix this?
Thanks,
Joe
Joseph M. Durnal MCM: Exchange 2010 MCITP: Enterprise Messaging Administrator, Exchange 2010 MCITP: Enterprise Messaging Administrator, MCITP: Enterprise Administrator

Hi,
I suspected an issue with communication on UDP port 3343. Please confirm the set rules for port 3343 on all the nodes in firewall and enabled all connections for all the profiles
in firewall on all the nodes are opened, or confirm the connectivity of all the node.
Use ipconfig /flushdns to update all the node DNS register, then confirm the DNS in your DNS server entry is correct.
The similar issue article:
Exchange 2010 DAG - NetworkManager has not yet been initialized
https://blogs.technet.com/b/dblanch/archive/2012/03/05/exchange-2010-dag-networkmanager-has-not-yet-been-initialized.aspx?Redirected=true
Hope this helps.
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Forefront TMG detected a possible SYN attack and will protect the network accordingly

Hi , Some times here internet is not working for using through TMG 2010. but Local Host Internet is working. then it should restart the
Microsoft Forefront TMG Control with related Services. then again users can access the Internet through TMG.
I check the Event Viewer in Server. it shows below Error Log.
Forefront TMG detected a possible SYN attack and will protect the network accordingly
what should for this ?
Regards, COMDINI

Hello,
An offending host attempts to flood Forefront TMG with half-open TCP connections by sending numerous TCP SYN messages to a Forefront TMG server and not completing the TCP handshake, leaving the TCP connections half-open.
Please enable logging to identified this hosts and then check if it is infected by viruses or malware programs.
Please see the value of the number of Maximum half-open TCP connections in Flood Mitigation settings for more information.
Once your problem is solved, you have to see "Forefront TMG is no longer experiencing a SYN attack." message.
This
posting is provided "AS IS" with no warranties or guarantees , and confers no rights.
Microsoft Student Partner 2010
/ 2011
Microsoft Certified Professional
Microsoft Certified Systems Administrator:
Security
Microsoft Certified Systems Engineer:
Security
Microsoft Certified Technology Specialist:
Windows Server 2008 Active Directory, Configuration
Microsoft Certified Technology Specialist:
Windows Server 2008 Network Infrastructure, Configuration
Microsoft Certified Technology Specialist:
Windows Server 2008 Applications Infrastructure, Configuration
Microsoft Certified Technology Specialist:
Windows 7, Configuring
Microsoft Certified IT Professional: Enterprise
Administrator
Microsoft Certified IT Professional: Server Administrator
Microsoft Certified Trainer

Will re-installing OSX and enabling Save Settings kill virus' and malwares?

Hello
My web pages are slow to load sometimes and I'm wondering if I have a virus or malware that is doing it.
I don't want to use virus checkers or malware checkers because I've heard they are themselves used by the virus writers to plant virus' and malwares.
So my question is; If I re-install OSX while enabling Save Existing Settings, will that remove any virus' and malwares if they are on my Mac?
Thanks for your help.

As there are no viruses for Mac OS X it is extremely unlikely that this is your problem, so let's concentrate on your slow page loading.
Firstly, you need a minimum of 10.5.7 (10.5.8 is better) to run Safari 4.0.3. You show you are using an earlier version of leopard.
Post back if you are not using Safari.
But to answer your direct question: just possibly, so read the following first:
No viruses that can attack OS X have so far been detected 'in the wild', i.e. in anything other than laboratory conditions.
It is possible, however, to pass on a Windows virus to another Windows user, for example through an email attachment. To prevent this all you need is the free anti-virus utility ClamXav, which you can download from:
http://www.clamxav.com/
However, the appearance of Trojans and other malware that can possibly infect a Mac seems to be growing, but is a completely different issue to viruses.
If you allow a Trojan to be installed, the user's DNS records can be modified, redirecting incoming internet traffic through the attacker's servers, where it can be hijacked and injected with malicious websites and pornographic advertisements. The trojan also installs a watchdog process that ensures the victim's (that's you!) DNS records stay modified on a minute-by-minute basis.
You can read more about how, for example, the OSX/DNSChanger Trojan works here:
http://www.f-secure.com/v-descs/trojanosxdnschanger.shtml
SecureMac has introduced a free Trojan Detection Tool for Mac OS X. It's available here:
http://macscan.securemac.com/
The DNSChanger Removal Tool detects and removes spyware targeting Mac OS X and allows users to check to see if the trojan has been installed on their computer; if it has, the software helps to identify and remove the offending file. After a system reboot, the users' DNS records will be repaired.
(Note that a 30 day trial version of MacScan can be downloaded free of charge from:
http://macscan.securemac.com/buy/
and this can perform a complete scan of your entire hard disk. After 30 days free trial the cost is $29.99. The full version permits you to scan selected files and folders only, as well as the entire hard disk. It will detect (and delete if you ask it to) all 'tracker cookies' that switch you to web sites you did not want to go to.)
A white paper has recently been published on the subject of Trojans by SubRosaSoft, available here:
http://www.macforensicslab.com/ProductsAndServices/index.php?mainpage=document_general_info&cPath=11&productsid=174
Also, beware of MacSweeper:
MacSweeper is malware that misleads users by exaggerating reports about spyware, adware or viruses on their computer. It is the first known "rogue" application for the Mac OS X operating system. The software was discovered by F-Secure, a Finland based computer security software company on January 17, 2008
http://en.wikipedia.org/wiki/MacSweeper
On June 23, 2008 this news reached Mac users:
http://www.theregister.co.uk/2008/06/23/mac_trojan/
More information on Mac security can be found here:
http://macscan.securemac.com/
The MacScan application can be downloaded from here:
http://macscan.securemac.com/buy/
You can download a 30 day trail copy which enables you to do a full scan of your hard disk. After that it costs $29.95.
More on Trojans on the Mac here:
http://www.technewsworld.com/story/63574.html?welcome=1214487119
This was published on July 25, 2008:
Attack code that exploits flaws in the net's addressing system are starting to circulate online, say security experts.
The code could be a boon to phishing gangs who redirect web users to fake bank sites and steal login details.
In light of the news net firms are being urged to apply a fix for the loop-hole before attacks by hi-tech criminals become widespread.
Net security groups say there is anecdotal evidence that small scale attacks are already happening.
Further details here: http://news.bbc.co.uk/2/hi/technology/7525206.stm
A further development was the Koobface malware that can be picked up from Facebook (already a notorious site for malware, like many other 'social networking' sites), as reported here on December 9, 2008:
http://news.bbc.co.uk/newsbeat/hi/technology/newsid_7773000/7773340.stm
You can keep up to date, particularly about malware present in some downloadable pirated software, at the Securemac site:
http://www.securemac.com/
There may be other ways of guarding against Trojans, viruses and general malware affecting the Mac, and alternatives will probably appear in the future. In the meantime the advice is: be careful where you go on the web and what you download!
If you think you may have acquired a Trojan, and you know its name, you can also locate it via the Terminal:
http://theappleblog.com/2009/04/24/mac-botnet-how-to-ensure-you-are-not-part-of- the-problem/
As to the recent 'Conficker furore' affecting Intel-powered computers, MacWorld recently had this to say:
http://www.macworld.co.uk/news/index.cfm?email&NewsID=25613
Although any content that you download has the possibility of containing malicious software, practising a bit of care will generally keep you free from the consequences of anything like the DNSChanger trojan.
1. Avoid going to suspect and untrusted Web sites, especially *********** sites.
2. Check out what you are downloading. Mac OS X asks you for you administrator password to install applications for a reason! Only download media and applications from well-known and trusted Web sites. If you think you may have downloaded suspicious files, read the installer packages and make sure they are legit. If you cannot determine if the program you downloaded is infected, do a quick Internet search and see if any other users reported issues after installing a particular program.
3. Use an antivirus program like ClamXav. If you are in the habit of downloading a lot of media and other files, it may be well worth your while to run those files through an AV application.
4. Use Mac OS X's built-in Firewalls and other security features.
5. Stop using LimeWire. LimeWire (and other peer-to-peer sharing applications) are hotbeds of potential software issues waiting to happen to your Mac. Everything from changing permissions to downloading trojans and other malicious software can be acquired from using these applications.
6. Resist the temptation to download pirated software. After the release of iWork '09 earlier this year, a Trojan was discovered circulating in pirated copies of Apple's productivity suite of applications (as well as pirated copies of Adobe's Photoshop CS4). Security professionals now believe that the botnet (from iServices) has become active. Although the potential damage range is projected to be minimal, an estimated 20,000 copies of the Trojan have been downloaded. SecureMac offer a simple and free tool for the removal of the iBotNet Trojan available here:
http://macscan.securemac.com/files/iServicesTrojanRemovalTool.dmg

Viruses and PCs within a Network

Similar Messages

Maybe you are looking for