Should doS attacks, I worry?

Similar Questions

• Help! DOS attack scans! I'm worried!

  Hi all

  So, I noticed some unusual ping spikes by placing the League of legends. I have also acquired a few devices not recognized such as 'Aplewatch of James' on my router of nothingness. That the name is incorrect, apple has two "P" s and also the Apple Watch doesn't have a wifi, bt just chip.

  I also had a "macbook air Johanson" but my MBA is not yet turned on, he was completely off.

  I changed the password and only authorized my mac address and everything was fine.

  I now have the following on my netgear router logs (there are more than 300 lines, ill just stick a little.)

  I write on the apple forums it is because 1, I hope the apple community and is, 2. I know that they will be useful 3. I have a time capsule and 2 expresses and wonder if that will be the effect on them, and 4 that I also watched one of the intellectual property on the internet and found that it belonged to apple!
  Why apple scans my router back attack he analyses?

  Please, please someone help. I am very worried.

  [DoS attack: ACK Scan] source: 122.252.42.217:443 Friday, March 12:17:32 18,2016

  [DoS attack: ACK Scan] source: 122.252.42.217:443 Friday, March 12:17 18,2016

  [IP DHCP: (192.168.0.6)] MAC address Saturday, March 18,2016 70:56:81:B0:80:FB 12:16:49

  [DoS attack: ACK Scan] source: Friday, March 17.133.231.9:993 18,2016 12:15:44

  [DoS attack: ACK Scan] source: Friday, March 17.133.231.9:993 18,2016 12:15:10

  [DoS attack: ACK Scan] source: Friday, March 17.133.231.9:993 18,2016 12:14:36

  [DoS attack: ACK Scan] source: Friday, March 17.133.231.9:993 18,2016 12:11:18

  [DoS attack: ACK Scan] source: 17.133.231.9:993 Friday, March 12:10:41 18,2016

  [DoS attack: ACK Scan] source: 17.133.231.9:993 Friday, March 12:10:19 18,2016

  [WLAN access denied] of MAC: 04:E5:36:6F:5E:9 D Friday, March 18,2016 12:02:28

  [WLAN access denied] of MAC: 04:E5:36:6F:5E:9 D Friday, March 18,2016 12:02:11

  [DoS attack: ACK Scan] source: Friday, March 122.252.42.217:443 18,2016 12:18:51

  This IP address belongs to Apple

• WNDR4300 Dos attacks

  I see in my logs

  [DoS attack: go Kill] source: 85.252.162.7, port 123, Monday, September 26, 2016 17:57:50
  [DoS attack: go Kill] source: 195.154.174.209, port 123, Monday, September 26, 2016 17:55:03

  [DoS attack: RST Scan] source: 188.121.36.239, port 80, Monday, September 26, 2016 17:52:32

  etc.

  Is it really attacks back. Why would anyone back me, and how to avoid it or guarantee me the better of her?

  Thank you.

  So you say that these things are normal. OK, I don't have a slow network, so I guess I can stop worrying

• DoS attack: END Scan from Microsoft

  
  
  a netgear router does not receive not of time signals, but NO, it's always January 1, 2003.
  
  What is new and totally boring is a relentless attack on a Server Microsoft in Singapore.
  I reported the abuse and asked for an explanation but received only an automated response.
  Not only that I have to pay for every byte they send me, but as you can see it also disrupts
  normal operation.
  Can I do to stop this?
  There are now 19 log files in my Inbox that contains only the lines like this:
  [DoS attack: FIN Scan] attack packets in last 20 sec of ip [111.221.77.151], Wednesday.
  
  [failed email] internet connection falls, Wednesday, Jan 01,2003 13:11:27
  
  [DoS attack: FIN Scan] attack packets in last 20 sec of ip [111.221.77.151], Wednesday.
  
  [failed email] internet connection falls, Wednesday, Jan 01,2003 13:11:05
  
  [DoS attack: FIN Scan] attack packets in last 20 sec of ip [111.221.77.151], Wednesday.
  
  [failed email] internet connection falls, Wednesday, Jan 01,2003 13:10:43
  
  [DoS attack: FIN Scan] attack packets in last 20 sec of ip [111.221.77.151], Wednesday.
  
  [failed email] internet connection falls, Wednesday, Jan 01,2003 13:10:22
  
  [DoS attack: FIN Scan] attack packets in last 20 sec of ip [111.221.77.151], Wednesday.
  
  [failed email] internet connection falls, Wednesday, Jan 01,2003 13:10
  
  [DoS attack: FIN Scan] attack packets in last 20 sec of ip [111.221.77.151], Wednesday.
  
  [failed email] internet connection falls, Wednesday, Jan 01,2003 13:09:40

  Has written a complaint to the [email protected].

  No response, but the attack has ceased.

• Why am I in DoS attacked by Apple?

  I have a Netgear router with enabled DoS protection and in the newspapers that I read:

  [DoS Attack: Ascend Kill] from source: 17.253.54.253, port 123, Wednesday, January 06, 2016 15:50:17[DoS Attack: Ascend Kill] from source: 17.253.54.251, port 123, Wednesday, January 06, 2016 15:50:17[DoS Attack: Ascend Kill] from source: 17.253.52.125, port 123, Wednesday, January 06, 2016 15:50:17[DoS Attack: TCP/UDP Echo] from source: 17.253.4.253, port 123, Wednesday, January 06, 2016 15:49:01

  Do a WhoIs on the IP addresses, I get:

  IP Location United States United States New York City Apple Inc.ASN United States AS6185 APPLE-AUSTIN - Apple Inc. (registered Dec 21, 1995)Resolve Host nlams2-ntp-001.aaplimg.com

  Now the question is:

  Why Apple is trying to back me?

  TCP and UDP ports used by Apple software - Support Apple products

  123 UDP port is used for the time protocol network.  Your router is probably just falsely reported as a DoS attack.

  https://en.Wikipedia.org/wiki/Network_Time_Protocol

• How to block a DOS attack while allowing clients to communicate with the server

  I need a temporary solution for a dos attack. I am running Windows 7 Professional and need to block a DOS attack while allowing customers to communicate with the server

  Hi Vinniethetouch,

  Thanks for posting in the Microsoft Community.

  The question you posted would be better suited to the

  TechNet forums; We recommend that you post your question in the TechNet Forums to get help:

  http://social.technet.Microsoft.com/forums/en/category/w7itpro

  If you need Windows guru, do not hesitate to post your questions and we will be happy to help you.

• Should Moto G4 - I worry?

  I am and have always been a big fan of the bike G. initially, I started with 1 G of Gen, I always keep a backup, I then moved on the 3rd generation that I currently have and I'm happy with it. Although I could not help it but order a standard G4 32 GB model which I am awaiting delivery of. I'm starting to get scared, read the stories of overheating issues, camera problems and lag. Should the line at the bottom is I worry?

  Companion come only on the forums like this when they have a problem don't worry everything you see here

  mine showed no signs of problems of heat... the reason why I'm here, what I have a speaker problem, so nobody seems to have

  again, I am only here because of a problem.

  my phone is getting replaced tomorrow by johnlewis

• Should IRQ conflicts, I worry?

  original title: conflicts/sharing

  Should I be worried?

  Updateing just finished my new wife Dell INSPIRON zino HD Windows 7

  Under system conflicts/sharing of Information, material resources... I got the following and may not know if items are conflicts or memories to share / IRQ:

  Direct access controller in memory of I/o Port 0 x 00000000-0x0000000F
  IO port 0 x 00000000-0x0000000F AMD PCI Express (3GIO) Filter Driver
   
  Port of e/s 0x000003C0-0x000003DF ATI Mobility Radeon HD 4200 Series
  PCI bridge to standard Port PCI e/s 0x000003C0-0x000003DF PCI
   
  Map of system memory address 0xFEC00000-0xFFFFFFFF
  Motherboard resources memory address 0xFEC00000-0xFFFFFFFF
   
  Memory 0xFE700000-0xFE7FFFFF to address ATI Mobility Radeon HD 4200 Series
  Bridge of PCI to PCI standard PCI memory address 0xFE700000-0xFE7FFFFF
   
  Memory address 0xD0000000-0xDFFFFFFF ATI Mobility Radeon HD 4200 Series
  Bridge of PCI to PCI standard PCI memory address 0xD0000000-0xDFFFFFFF
   
  IRQ 17 Standard PCI enhanced USB host controller
  IRQ 17 Standard PCI enhanced USB host controller
  IRQ 17 Standard PCI enhanced USB host controller
   
  IRQ 18 Standard OpenHCD USB host controller
  IRQ 18 Standard OpenHCD USB host controller
  IRQ 18 Standard OpenHCD USB host controller
  IRQ 18 Standard OpenHCD USB host controller
   
  Memory address 0xA0000-0xBFFFF ATI Mobility Radeon HD 4200 Series
  Bridge of PCI to PCI standard PCI memory address 0xA0000-0xBFFFF
  Memory address 0xA0000-0xBFFFF AMD PCI Express (3GIO) Filter Driver
   
  IRQ 19 AMD SATA Controller
  IRQ 19 High Definition Audio Controller
  IRQ 19 Atheros AR8151 PCI - E Gigabit Ethernet Controller
   
  Port of e/s 0x000003B0-0x000003BB ATI Mobility Radeon HD 4200 Series
  PCI bridge to standard Port PCI e/s 0x000003B0-0x000003BB PCI
   
  Memory address 0xB0000000-0xDFFFFFFF AMD PCI Express (3GIO) Filter Driver
  Motherboard resources memory address 0xB0000000-0xDFFFFFFF
   
  Port of e/s 0x0000D000-0x0000D0FF ATI Mobility Radeon HD 4200 Series
  PCI bridge to standard Port PCI e/s 0x0000D000-0x0000D0FF PCI

  No worries.  For many years now IRQ is shared.  Your output looks like normal.

• Should we start to worry or not?

  Guys,

  As an Apple Developer, I just received a newsletter stating that:

  "From February 1, new applications and app submitted to App Store updates must be generated with Xcode 5 and iOS SDK 7"

  https://developer.apple.com/ios7/ -> take a look at the last paragraph

  So should we be concerned on this subject or not? What all do I think?

  Hi all

  The problem has been resolved and the 4.0.0.1619 version is available at

  http://labsdownload.adobe.com/pub/labs/flashruntimes/air/air4-0_sdk_mac.tbz2 for mac and http://labsdownload.adobe.com/pub/labs/flashruntimes/air/air4-0_sdk_win.zip for windows. Please let us know if you face any issues.

  Kind regards

  Hichem

• Watchdog question along with BACK Smurf attack on router and duplicate MAC hardware address

  Before we get into too much detail, you should know that my understanding of the internal processes of a MAC or any computer self-taught self and therefore flawed and elementary is at best.  Specifications for my MAC will be provided below my Epistle.   The bottom line is that I caught an employee a long time ago on my iMac while I'm out and I noticed that she was doing something with the watchdog.  I thought nothing of it at the time, but the watchdog of name stayed with me.  Since that time, over a year ago, there were several problems with why online banking and other fraud concerns.  If the 2 are linked, I have no way of knowing.  But my iMac is essentially useless at this point, there are countless accidents every day... but before you spend $3,000 on the new, I thought that it prudent to ask for assistance from several sources informed.  My console, I noticed several instances of the hardware MAC (DAD) duplicate addresses.  I'll give you the result below.  I have also connected to my router Xfinity and that this month there were 5 distinct "SMURF ATTACKS" or DOS attacks.  Yet once, I'll give you the result below.  And finally, by connecting to my computer in standard mode, watchdog daemon doesn't seem to exist. However, when in safe mode, there is, but he is unable to initialize.  I followed Davis Linc instructions (from a question someone asked about watchdog not booting not) and his bash script output will be provided below.  Any help would be appreciated I run my business from my iMac and say State it mildly, I'm tired of spending days trying to solve this problem.

  Be aware that, in my view, that my virtual RAM is low, although I can't find a definitive answer.  Support Apple says simply drag the hard drive and start over.  Maybe they have reason.  No matter, I know that I have provided too much information below, but I don't have the knowledge to know what is important and what is not germain to the issue.    Thank you in advance.

  I. SMURF ATTACK - denial of Service

  FW. IPv6 BEFORE drop, attempts of 1772, 2016/3/13 12:44:59	Firewall blocked
  FW. Fall of IPv6 ENTRY, 22 attempts, 2016/3/13 12:38:09	Firewall blocked
  Blocked Unallowed devices, 17 attempts, 2016/3/13 12:14:43	Machine blocked
  FW. IPv6 FRONT drop, 3209 attempts, 2016/3/12 23:57:02	Firewall blocked
  FW. Fall of IPv6 ENTRY, 251 attempts, 2016/3/12 17:46:33	Firewall blocked
  Device MAC: 70:48:0F:82:02:43, 11281 attempts, 2016/3/12 12:52:06	Machine blocked
  FW. LAN2SELF DROP, 2 attempts, 2016/3/12 09:31:22	Firewall blocked
  FW. IPv6 FRONT drop, 2622 attempts, 2016/3/11 23:56:33	Firewall blocked
  FW. Fall of IPv6 ENTRY, 301 attempts, 2016/3/11 23:17:54	Firewall blocked
  FW. IPv6 BEFORE drop, attempts to 2392, 2016/3/10-23:56:04	Firewall blocked
  FW. Fall of IPv6 ENTRY, 323 attempts, 2016/3/10-23:35:55	Firewall blocked
  FW. IPv6 BEFORE drop, attempts at 2669, 2016/3/09 23:57:34	Firewall blocked
  FW. Fall of IPv6 ENTRY, 186 attempts, 2016/3/09 23:38:57	Firewall blocked
  Device MAC: 38:71: A: 18:D2:C9, 14185 attempts, 2016/3/09 23:32:32	Machine blocked
  FW. IPv6 BEFORE drop, attempts to 2986, 2016-3-08 23:57:12	Firewall blocked
  FW. Fall of IPv6 ENTRY, 305 attempts, 2016-3-08 21:55:14	Firewall blocked
  FW. IPv6 BEFORE drop, 999 attempts, 2016/3/07 23:57:50	Firewall blocked
  FW. Fall of IPv6 ENTRY, 105 attempts, 2016/3/07-23:53:20	Firewall blocked

  WiFi] [1393]: Wifi WPA2-Personal security mode 3/2016/02 05:40:06Notice [Dhcpc] [2224]: erouter0 T1 expires, Enter rescued State 2016/3/02 01:11:12Notice [962] Firewall: DoS attack - SMURF ATTACK IN = erouter0 OUT = MAC = 10:86:8 c: 50: *: *: 00:13:5f:05:ab:e2:08:00 SRC = DST = 46.229.168.201 *.155.194.241 LEN = 40 TOS = 00 PREC = 0x20 TTL = 41 ID = 29965 PROTO = ICMP TYPE = CODE 13 = 0 2016 15:16:16Notice / 3 / 01 [Dhcpc] [2224] : erouter0 T1 expires, Enter rescued State 2016/2/29 05:08:01Notice [962] Firewall: DoS attack - Smurf Attack IN = erouter0 OUT = MAC = 10:86:8 c: 50:2 *: 00:13:5f:05:ab:e2:08:00 SRC = DST = 73.155.194.241 LEN = 40 TOS = 00 PREC 209.126.116.176 = 0x20 TTL = 35 ID = 31525 PROTO = ICMP TYPE = CODE 0 2016 = 13 / 2 / 28 04:26:41Notice

  II. customers blocking Shutdown

  My iMAC struggles to sleep and I noticed this from the Console.  Not sure if that means anything, but I wanted to offer it.

  com Apple.ctkpcscd (164)

  19/03/16 4:54:57.728 Photos [34785] PM: customers blocking the closure:

  IPXProjectBrowserController2 (0x7ff8dd84e480), County of registration = 1

  PAImageItemController (0x7ff8df12bd70), County of registration = 1

  IPXProjectBrowserModel (0x7ff8d8f86600), County of registration = 1

  IPXAlbumsBrowserController2 (0x7ff8dd840600), County of registration = 1

  PAImageItemController (0x7ff8de2af680), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7da20), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda534f0), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda73b10), County of registration = 1

  IPXSharedTabBrowserModel (0x7ff8d8f81760), County of registration = 1

  RKBackgroundImageProcessingContext (0x7ff8db6b29e0), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda535a0), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7db00), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda73bc0), County of registration = 1

  IPXDatabaseYearsController (0x7ff8ddcb6f70), County of registration = 1

  IPXMainWindowController (0x7ff8d8c47380), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7c390), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7d3d0), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda73c70), County of registration = 1

  _IPXOneDatabaseSpecificVersionsController (0x7ff8df01c0a0), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7d480), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda73d20), County of registration = 1

  IPXDatabaseYearController (0x7ff8dda7dcf0), County of registration = 1

  IPXProjectEditorProxy (0x7ff8d8c42d90), County of registration = 1

  IPXDatabaseYearController (0x7ff8dda11bd0), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7d530), County of registration = 1

  FaceRecognition (0x7ff8d8fa9f40), County of registration = 1

  IPXDatabaseYearController (0x7ff8dda7dda0), County of registration = 1

  IPXDatabaseCollectionsController (0x7ff8ddcb7220), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7d5e0), County of registration = 1

  IPXAlbumThumbnailGenerator (0x7ff8d8d85a50), County of registration = 1

  IPXDatabaseYearController (0x7ff8dda7de50), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7d690), County of registration = 1

  IPXFolderThumbnailGenerator (0x7ff8d8fceeb0), County of registration = 1

  PAImageItemController (0x7ff8de31e4a0), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7d740), County of registration = 1

  IPXEditorModel (0x7ff8d8c41030), County of registration = 1

  IPXImportBrowserModel (0x7ff8d8c22230), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7d7f0), County of registration = 1

  IPXDatabaseYearController (0x7ff8dda7e010), County of registration = 1

  IPXVersionsMonitor (0x7ff8de143b60), County of registration = 1

  IPXPhotosBrowserModel (0x7ff8d8f79d20), County of registration = 1

  IPXVersionsMonitor (0x7ff8de255a70), County of registration = 1

  IPXDatabaseCollectionController (0x7ff8dda7d8a0), County of registration = 1

  IPXDatabaseYearController (0x7ff8dda7e0c0), County of registration = 1

  IPXEditorModel (0x7ff8de626590), County of registration = 1

  IPXEditorModel (0x7ff8ddbaadf0), County of registration = 1

  IPXBadgesOverlayController (0x7ff8ddd5ab10), County of registration = 1

  IPXAlbumsBrowserModel (0x7ff8d8f86540), County of registration = 1

  19/03/16 4:55:03.411 Photos [34785] PM: customers blocking the closure:

  FaceRecognition (0x7ff8d8fa9f40), County of registration = 1

  IPXPhotosBrowserModel (0x7ff8d8f79d20), County of registration = 1

  IPXSharedTabBrowserModel (0x7ff8d8f81760), County of registration = 1

  IPXImportBrowserModel (0x7ff8d8c22230), County of registration = 1

  IPXAlbumsBrowserModel (0x7ff8d8f86540), County of registration = 1

  The closure of blocking app which seems to be Photos.   I would back up all your files here first - probably two external backups - then try a photo / iPhoto repair pass - stop pictures / iPhoto, then launch the application with the option key (also labeled alt on some keyboards) and command.   You should get a dialog box asking you if you really want to fix the library.   If this fails, I would export or copy everything I could and rebuild each photo / iPhoto or - given other issues here - the whole of the environment.

  Regarding the duplicate addresses, you have an airport or time Capsule?  And if you want and need to have Wi - Fi and network assets, wired (such as it is apparent that this is the case), you will need to configure Wi - Fi as a point of access (the ' bridge'), or configure separate subnets for traffic.   This can be automatic with some integrated network devices, but may require one manual configuration with others.   But if you have a Gigabit Ethernet connected and active cable, there is usually very little reason to have Wi - Fi connected and active.

  What did or didn't happen here with unauthorized access is not likely going to be addressed either through the forums, many different things can happen to a system that has been compromised or has suffered an attempt to compromise, unfortunately.

  In regards to your concerns around safety and handling, the system has been tampered with, Apple is correct.    Down your data to one or two probably of external storage devices and reinstall from verified distributions and do not migrate existing applications or tools.   Reinstall those distributions checked.    Also remove all products the security module, anti-virus or anti-malware tools can be added here - what that looks like Symantec is installed - according to the suppliers for this withdrawal.   Additional security tools can cause a variety of problems in the system.

  You'll want to have these external backups in all cases, as one of the causes of the reported behavior is a peripheral fault storage.  Systems to get slow and flaky when storage is a failure.   A Time Machine configured and running, or some other regular module backup tool, at least.

  What is happening outside your router's problem of Verizon and just the normal dreck that happens on the rest of the Internet.   This is not your problem, unless you opened Internet access paths to the inside through the router on your network, and so does the rest of the Internet your problem.

  I'd probably also avoid installing the software add-on from HP, if you print only and you don't need features beyond what is in the base OS X distribution.

  The process of CEPHtmlEngine consuming resources system generally involves the Adobe software; see the for more details on this Adobe forums.

• Several Internet gel 30 seconds + DDoS attacks

  I get anywhere from 3 to 10 per day ddos attacks, many of them coming from the same IP it happens every day and it's really annoying. I tried to install some VPN and DDoS protection free programs, with no help. These 3-15 attacks, I have to deal with every day are stored in my Netgear router logs and one here that I had a few days ago.

  [DoS attack: FIN Scan] attack packets in last 20 sec of ip [104.73.189.44], Wednesday, Feb 10,2016 10:53:54
  [DoS attack: FIN Scan] attack packets in last 20 sec of ip [23.3.98.26], Wednesday, Feb 10,2016 07:45:56
  [DoS attack: FIN Scan] attack packets in last 20 sec of ip [104.73.189.44], Wednesday, Feb 10,2016 07:40:13
  [DoS attack: STORM] attack packets in last 20 sec of ip [98.188.116.2], Tuesday, Feb 09,2016 13:42:16
  [DoS attack: STORM] attack packets in last 20 sec of ip [98.188.116.2], Tuesday, Feb 09,2016 13:41:01
  [DoS attack: STORM] attack packets in last 20 sec of ip [98.188.116.2], Tuesday, Feb 09,2016 13:40:40
  [DoS attack: STORM] attack packets in last 20 sec of ip [98.188.116.2], Tuesday, Feb 09,2016 13:40:20
  [DoS attack: Smurf] attack packets in last 20 sec of ip [5.246.97.255], Monday, Feb 08,2016 15:19:02

  Not only that, but whenever I play CSGO or Minecraft, my internet freezes (including voices, stopping in Skype, mumble, teamspeak, etc.) and it happens every 20 to 90 seconds about 2 to 6 seconds, and sometimes, there's a small 1-2 second freeze thereafter.
  I don't know how many of you play competitive Minecraft and CSGO, but if you do, you know how much a tip of ping or huge internet gel box will cost your game sometimes, and that was really pissing me off.

  More information:
  My internet is Time Warner Cable (live in the middle of nowhere), my router is a Netgear WNDR4500v2 I got before all this happened. Initially, when I got the router, I had no lagspikes, or at least none that was like that. Then I got another modem, then there was some lag every few minutes or so for like 2 seconds, which was not really that big of a deal, I only noticed in CSGO, but a week or two there, I got a new modem, and it was fine for a few days, until it was like 4 or so days ago I started to have the issue I described above.

  Any help would be great, I tried a factory restore my computer and I did so no games or software updates in the background, but not luck. If necessary, I can give more information on the issue and my software/internet, etc.

  This post is too similar to my problem: https://community.netgear.com/t5/General-WiFi-Routers/WNDR4300v2-lag-spikes-every-20-30-seconds/m-p/...

  Are you running wired or wireless?

  If you bypass the router, you get the same ping spikes?

• Outlook 2007 is limitation of message size, although there is no restriction of message on the Exchange 2003 server.

  When one of my users trying to reach a 50 MB file to an e-mail message, Outlook 2007 immediately appears with the following message: the attachment size exceeds the allowable limit.  The user is not even allowed to attach the file such as Outlook it immediately blocked.  We have a 10 MB limit for messages that leave the organization.  This user has attempted to send the file to another Member of our Organization. In Outlook 2003, we are able to send 50 MB files to another without problem. Does anyone have any suggestions? I wonder if there is a setting in Outlook 07 which limits the size of an attachment. The confusing part is that he was not yet able to attach the file.

  OS: XP Pro 64-bit
  Suite Office 2007
  Exchange 2003

  Thank you!

  Hello

  1 you need to set the maxRequestLength value in the web.config file to a value greater than 50 MB. The maxRequestLength value in the web.config file is a parameter ASP.NET prevents applications greater than a certain length that has been added to prevent DOS attacks. He is set to 30 MB by default and must be increased in order to send attachments more than 30 MB. This could also be declined to enforce a lower limit.

  2. you need to increase the MaxSubmitMessageSize which is a property of the mailbox of readonly (MaxSubmitMessageSize = 0x666D0003) and this is where we reach the limit of 10 MB.

  It is read from the following locations:

  1. First reading of the object the user mailbox
  2. If not found as indicated by "unlimited", Transport Settings Container
  3. If not found as indicated by "unlimited", Org (read default Org container) container

  To set the value, use the following tasks in the Exchange Management Shell:

  1 set-transportconfig MaxSendSize (this is KBS) and then assign 51200 for 50 MB attachments. This will put it to all users

  Or

  2 set-mailbox and set the MaxSendSize (this is KBS) to 51 200 for attachments of 50 MB forspecific to a set of users.

  Once you set or the other, you must recycle store or not access to the mailbox for 15-20 minutes (to allow to store the cache expire) so that the change in size to have effect. In addition, the property is stored in AD and submitted to replication delays.

  One last thing that you should be aware of (sorry, the list will just):

  We have a timeout of 60 minutes for any attachment request or download attachment query (in OWA basic and Premium). So if you try to download an attachment 50 MB on a 56 Kbps connection, you will then expire and get a HttpWebException (e.g., the max upload is about 25 MB on a 56 Kbps connection).

  So, to sum up, there are two keys to send a large attachment:

  1 ASP.NET change web.config settings.

  2 modify the MaxSendSize using the set-TransportConfig (for all users) or Set-Mailbox for individual users.

  And you must

  3 ensure that the total download time will be less than 60 minutes (depending on your size and the speed of your network link)

  The web.config change is immediate, but the MaxSendSize change takes time, because of the caching strategy (the letter box, DSAccess deadlines and delays in replication cache).

  Examples:

  Changes to Web.Config

  By default, web.config under OWA virtual directory (Microsoft\Exchange Server\ClientAccess\Owa) will have the following entry (by default, the maximum request size is about 30 MB):

  ....

  Change to where X is the value you want in KBs. 50 MB, X will be of approximately50000

  Change the size limit of messages by user

  Go in the Exchange Management Shell and type the following command:

  Set-mailbox - id: "username" - MaxSendSize:50000

  Where "username" is the identity of the mailbox. This will set the limit to send message to about 50 MB. You need to restart the store to see the effect immediately.

  Change the size limit for messages of all users

  Go in the Exchange Management Shell and type the following command:

  -Set-transportconfig MaxSendSize: 50000

  This will set the limit to send message to about 50 MB. You need to restart the store to see the effect immediately.

• ID and PIX 515

  I was told that the PIX 515E firewall is capable of BLOCKING malicious attacks as attack Dinal of Service. I learned again by CA engineers that it not are a NO product out there that is able to block attacks but rather notify the administrator only. I'd like your opinion on whether the PIX firewall can actually BLOCK attack or not. Thanks in advance.

  The PIX has some features to prevent DOS attacks, but he can't block everything. For example, if someone launches an attack smurf or something that uses all of your available bandwidth, then the PIX obviously cannot do anything about it because the damage is already done at the time wherever traffic allows you the PIX.

  For something like a TCP SYN attack on a host inside the PIX, then you can configure the static command to allow only a total number of connections through, and/or a number of half-open connections through the internal host, effectively protecting the Server internal. The PIX will refuse further attempts to connect over this limit.

  The PIX also has a built-in limited to IDS. It can detect signatures of 59 common packages and can be configured to block these if they are considered. Signatures that he seeks only are based a package signatures, wide as a real IDS device can get nothing.

  In short, no one can say yes, "The PIX prevents all attacks back", no box cannot do that, because it depends on what the attack back. If someone is flooding your available circuit bandwidth, you really get your ISP involved to block this traffic BEFORE it happens to you. Yes, host-based DOS attacks, the PIX should be able to block most of them with standard configuration controls.

• TCP Intercept feature

  If I understand the documentation, I need an embryonic limit on my static commands to enable syn attack, it blocks my pix. However, I am not clear on what constitutes a reasonable limit embryonic. We have several servers open to various ports including www, ftp, smtp, and some oracle application ports. Most is light use, nothing real heavy.

  Any suggestions on what I should be affecting my embryonic connection limits?

  Also, do I need to set a maximum limit of connections as well?

  Thanks in advance,

  RLS

  Hello

  Well, the answer to your question is "it depends." Each server operating system has an embryonic connection limit built in. In other words, the amount of embryonic connections max that can manage the operating system itself. We recommend generally, limit the embryo on the PIX for a number which is a little lower than what the operating system can handle as the idea is to protect the server behind the PIX against a DOS attack. For example, most Windows boxes have a limit of 128. In such cases, setting the connection limit embryonic on the PIX of 120 or 115 would be sufficient. Maximum number of connections do not need to be defined jointly with the econn parameter, but you can set certainly as well if you wish. Again, this number should be set according to the number max of & that your server can handle. I hope this helps.

  Scott

• Authentication of the junction ports?

  Hi all

  Maybe a stupid question, but I am unable to find a satisfactory answer.

  We have a couple of 3560 switches, all connected to 3750 battery. One of these 3560 switches is in an open area and asked me if that could be considered a security risk. Of course, whether in an open place is a risk, but if anyone where them unplug the connection of the trunk to our battery and then plug it into another switch, what will happen?

  Should / could authenticate us ports/channel-groups of circuits? I have all the switches configured for authentication ssh connection and network (mac based) against a radius server, but I have not configured authentication on trunk ports that I found descriptions that dot1x cannot be enabled on the ports of junction.

  Thanks in advance

  Chris

  Hello

  I suggest the following:

  > Organise a physical envelope (locked) or any other control of physical security to ensure authorized access to the device. Work around any technical solution or bandage should be only temporary. What is a righteous person happening to your switches? DOS attack! This could also be done by mistake, with the result a unstructred threat.

  > Allow follow-up of these switches (ICMP, SNMP), so that you are alerted when they are disconnected.

  > Change the default NATIVE VLAN (vlan1)

  > Disable trunk negotiation (mode ON)

  Concerning

  Farrukh