FWSM: rule on tcp/1089 breaks DNS lookups

Similar Questions

• Is it possible to change the behavior of the URL bar so that it performs a DNS lookup on the entry that is clearly not a website? (I want to search :)

  Chrome, for example, does not perform a DNS lookup if the entry is not a valid Web site, instead, it searches in the default search engine.

  I think that if the bar URL have behaved in a similar way, it would increase by many user experience. I really like Firefox and using it for a few years, but these are things that really annoy me as a developer.

  The one big flaw that I find in the Chrome version of manages the entrances to bar URL is that one cannot add custom Chrome of top level domains, which makes working with top level domain websites internal quite annoying.

  See also:

  • http://KB.mozillazine.org/Location_Bar_search
  • http://KB.mozillazine.org/keyword.enabled
  • https://support.Mozilla.org/KB/location+bar+search

  You can also add a ((one letter) to a search engine keyword and use the keyword in the address to select/use bar a specific search engine.)

• I use a server DNS Server 2008 and need to transmit the DNS lookup on a Linux server that only allows you to Port 3128 for DNS.

  Hello

  I use a server DNS Server 2008 and need to transmit the DNS lookup on a Linux server that only allows you to Port 3128 for DNS.

  How can I configure my DNS server to use this port for shipments?

  Thanks for your replies

  Marcus

  Hello

  The question you posted would be better suited in the TechNet Forums. I would recommend posting your query in the TechNet Forums.
   
  http://social.technet.Microsoft.com/forums/en-us/winserverNIS/threads
   
  Here are a few Server DNS forwarders. Links for refrence,
   
  http://TechNet.Microsoft.com/en-us/library/cc754941.aspx
   
  http://TechNet.Microsoft.com/en-us/library/cc731991.aspx
   
  I hope this helps.

• DNS lookup has no problem

  Oct.21, 11, I started the computer and open Google Chrome.When I was Going To 'www.youtube.com', he said "DNS Lookup Failed". Please help me on this problem!

  (Note: I have used computer to my brother for a while.)
  -ArnoldAlejoNunag

  Hi AlejoNunag Arnold,

  1. did you of recent changes on the computer?

  2. you receive similar error on all sites?

  I suggest that you check if you are faced with the similar question when the YouTube site access Web using the web browser Internet Explore.

  If the problem is that when you use Google chrome, so I would suggest that you contact the support of Google chorme.

  http://www.Google.com/support/chrome/

• Ping.exe DNS Lookup method

  Utility how ping.exe performs its domain name resolution as it does not use traditional port 53 UDP DNS lookup. I tried using Network Monitor 3.4 TechNet but couldn't find anything that seemed to do the trick.

  Any help would be greatly appreciated.

  Just another note the absence of any visible search in NetMon 3.4 is the same for the areas not cached.

  Thanks in advance!

  If your local DNS cache contains the resolved domain name so there is no need to query DNS server.

  in all other cases, I think it uses the DNScache service for resolution of domain, that is if local cache is missing the field being ping IP address.

  Try process monitor from technet

  apply the filter for UDP only and you will see will demand UDP Port 53 so that ping an unknown host.

  He will tell you even what type of program, and request that the user initiated.

• repeated #105, "DNS lookup failure" error, pavilion2000-299wm

  Flag 2000-299wm, model # qe282uar #aba, WIN 7 home, google chrome.     I get the DNS lookup failure error 105 (net::ERR_NAME_NOT_RESOLVED): could not resolve DNS of the server addressmessages) and reloading is usually not good.      I décliqués the box "Use a proxy server for your LAN" "but do not know what else to do.

  also, I notice that my connection often shows "dormant" when I actively use the computer/connection...i don' don'tknow if this could be related or not.

  Unfortunately I am not very computer... the knowledge I have are self-taught and I only know how to use a computer not diagnose or even no terms that are second nature to someone who knows what they're talking about... so please use language I can understand and be patient with me?

  Looks like you are having network connectivity problems or if you connect to a network with problems.

  First of all, make sure that your computer is connected to a network with internet access with success, by checking the cable network (ethernet) - is - it connected correctly? If you do not use a network cable, make sure that your wireless connection is connected to the appropriate network.

  If you're still having problems after checking the physical connection, try to run Windows Network Diagnostics. Make a right click on the network of small size or icon wireless near the clock (bottom right of the screen by default), and then click "solve problems". This wizard will search for and attempt to correct any network, connectivity issues.

• Reset TCP/IP v4 DNS guard!

  I want to set to automatically obtain DNS my TCP/IPv4 properties. However when I check the box it works for so long and then resets and seizes the addresses in the DNS address areas.

  How can I delete these addresses and get it to 'paste' in automatic mode?

  Thank you

  Try resetting TCP/IP: http://support.microsoft.com/kb/299357.  Make sure that you take note of the appropriate settings before doing this so that you can restore when it in fact.  This should remove all stored DNS addresses there and then they hopefullly will not be able to come back and you won't get them automatically.

  I hope this helps.

  Good luck!

  Lorien - MCSA/MCSE/network + / has + - if this post solves your problem, please click the 'Mark as answer' or 'Useful' button at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.

• TCP/IPv4 obtain DNS automatically

  Hi all

  I have my router configured to use dns to opendns servers, and everything works fine except for my desktop under Vista SP3 PC.

  I have my router set up because of the IP based on MAC addresses, so I have the TCP/IPv4 set to obtain an IP and DNS address automatically.

  My problem is the PC of Office Watch reset itself and registering an address in the DNS server box. How do I delete these addresses and force it to Auto adjust.

  I don't really want to put in the openDNS servers, in case I decide to go back to my ISP servers. I prefer to keep auto and make the changes on the router.

  It becomes very frustrating to have to keep resetting.

  Go to start / Control Panel / Internet Options / connections / select the connection and click settings.  Click on properties and go to work in network and select TCP/IPv4.  Under TCP/IPv4, select properties and make sure that the first page says get an address of DNS server automatically.  Click Advanced and then click DNS.  Make sure that the only two boxes checked are Append primary and Suffixes connection specific DNS and add relatives of the main DNS - nothing else suffix suffixes.  Click OK and save this.  This should solve the problem.  But I suspect that you already did (probably several times) so let's move on.

  The only other option that I can think of is to reset the TCP/IP stack that can get rid of the incorrect addresses and run and fresh with the correct settings.  Here is the procedure:http://geekswithblogs.net/mattcampbell/archive/2007/09/30/Resetting-your-whole-IP-stack-in-Vista.aspx.  I don't know if this will help, but if you are having problems with TCP/IP, it is one way that many people use to solve.  Then you will need to reconfigure the TCP/IP settings and then you can see if that does the trick.

  I hope this helps.

  Good luck!

  Lorien - MCSA/MCSE/network + / has + - if this post solves your problem, please click the 'Mark as answer' or 'Useful' button at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.

• High load on the DNS lookups strange made BBNTD

  I don't know if there is a bug report area (I have to confess I always get lost on this site - between BB and Quest, but that's for another day), but I see some very crazy behaviors of one of my installations of BBPE. I'm still running v4.4 (access to builds more returned was one of my many problems with taken BB - a site for hours chatting with someone - again, for another day), but my config remained relatively unchanged for some time, but recently, I have been see a lot of testing side purple server will year it corresponds with a heavy load of CPU on BBNTD - almost 60% on a Server 2 processors with 3 GB of RAM. The server is 2008 R2 with all the patches. When I drilled down, I saw a large number of packets DNS targeting the DNS server (flooding the server DNS - something like 750 packets per second). Queries seem to be for a part of the name. All my internal machines are in the DNS netway.priv space, but queries are for y.priv and y.priv.netway.priv, again and again in order. The DNS server sends responses without a name such as one might imagine.

  I can provide the config files and wireshark capturing traffic, but there seems to be a parse error, perhaps for a nonprintable character or something. The last thing I did to the system was to allow and to start using the web - host configuration editor. This may have introduced a problem or it would be completely different.

  At the present time, my server is useless noctilucence, because it shows stale random tests more than actual errors. BBPE and BBBTF have been quite reliable, as I am unaware of any troubleshooting tools available to the attention of implementers. Is there a way to put BB server logging mode or debug? Can someone tell me how can solve this problem. I'm reduced to systematically change the bbhosts file to try to isolate the problem. I am trying to turn off all DNS queries for devices in the namespace my, using testip and no conn, but even if it works, it is not acceptable in the long term.

  Advice or guidance would be appreciated.

  Jim Graczyk

  [email protected]

  Hi Jim,.

  I understand your frustration, but I've never seen that happen before (I thought at first, but when you bring DNS queries, then it was something new, at least for me). And as there is no ticket open with Quest (at least to my knowledge), it is difficult to debug without access or data from the facility.

  At this point, I strongly suggest an opening with Quest support call. If you have purchased licenses BBPE, you are entitled to it. This site is a community where it's more of the "how can I" or "where can I" type of questions. When it comes to questions like yours, if after one or two responses, the problem cannot be resolved, it is better to contact quest support (as I suggested). It will probably find its way to me. And I'll be happy to work with you to resolve the issue.

  concerning

• DNS lookup failed

  When I try and connect to the internet, an error pops up saying that the Web page is not available. When I troubleshoot the problem it comes up saying that the DNS server is not responding. I looked towards the top of tutorials on the internet to see if I can solve the problem that way, and they actually work, but only for a short period of time (about 2 minutes). These are the videos that helped me http://www.youtube.com/watch?v=q0FQzgAry0g http://www.youtube.com/watch?v=OqLDGA3j-tc , but they temporarily solve the problem. I use the server address that told me to use, but after about 2 minutes, happening at the broken DNS address which rises to 127. 0 0.1. It is very frustrating and I can't seem to fix it. Any help!

  Hi RhysMelville,

  Do you use wired or wireless internet?

  I suggest you clear the DNS cache and see if that fixes the problem. Clear the DNS cache forces DNS to query a DNS server rather than using the information stored in the cache.

  Follow these steps:

  a. click on the button 'start '.

  (b) in the search box, type "command prompt".

  c. in the list of results, right-click Guest and then click Run as administrator. If you are prompted for an administrator password or a confirmation, type the password or provide confirmation.

  d. at the command prompt, type ipconfig/flushdns

  e. then type ipconfig/registerdns , and then press enter

  You can also look at the suggestion of the following link:
  http://social.technet.Microsoft.com/forums/Windows/en-us/eeb84518-903D-46d1-9398-80cf211878d7/Windows-7-DNS-server-not-responding

  Hope the above information helps.

• What means "Blacklist DNS reverse response searching for known malware domain spheral.ru - Win.Trojan.Glupteba (1:31600)"?

  I have a Cisco ASA5516x w / firepower with an IPS license installed and I'm trying to determine what means this Impact 1 alert:

  Reverse DNS BLACK list response searching for known malware domain spheral.ru - Win.Trojan.Glupteba (1:31600)

  The source looks like it's coming from DNS servers on the internet:

  208.67.220.220

  208.67.222.222

  4.2.2.6

  204.117.214.10

  The destination is our domain controllers that are configured to be our DNS servers. I'm just trying to understand what really means this alert? The classification is "a network Trojan has been detected", but this means that a user attempted to solve an to a site that has been reported as malicious DNS record, or they have malicious software on their PC that is trying to connect to a server command & control out in the wild? To be clear, the penetration of these alerts are outside interface and evacuation is our inside interface. If someone can provide a clear explanation for these alerts, it would be greatly appreciated. Thank you!

  Hello

  This does not necessarily mean that the PC or the DC are infected. This rule is for a reverse DNS lookup.

  With the source and the destination, it could just be a package that is the reverse DNS lookup query response. Now, why this request is sent in the first place is a question and a value of the investigation.

  flow: to_client; content: "|" 07. spheral | 02. ru | 00 | » ; fast_pattern: only;

  Download the capture of packages in the case of the rule, you can check and verify the IP address that is resolved to spheral.ru and then identify what PC initiated the request.

  Sometimes, it could be an AV product or security, try to reverse search DNS for an IP address of the suspect.

  Rate if helps.

  Yogesh

• Why host program accesses DNS server

  I used the communication wizard to generate the TCL, NPL and HOST part. I'm behind a VPN router that I can disconnect from the outside world. The RT and the HOST system are connected to the VPN. I can start the RT part (TCL &)
  NPL) host through the interface Project RT. But, when I try to start the part host and internet is busy, I have a second 6-8 downtime (a break from any activity on the host computer). The loop of the HOST is a one shot which goes on in an another VI. So the possibility of a break gets greater. The break is always there if I disconnect the VPN from the outside world. Error message "Waiting for motor RT to respond ', which will expire after 6 to 8 seconds and displayed data. On one of the forums, said that host go to 192.168.1.1 and 127.0.0.1 by using the DNS lookup. Why is there a DNS lookup?
  Passing the address of the VPN gateway is 192.168.1.1. The glass by pulling the process cannot afford 6-8 second delay. Is there a solution? Attached file cannot be completed.

  Thanks for your help.

  Thomas Szebenyi
  Research technician
  Cornell University

  By the intermediary of Trey B. or support:

  "I think the DNS lookup occurs because the Phar Lap ETS OS on the PC in real time like to reverse things search DNS that communicate with him."
  You say that your IP addresses are fixed/static.  Have you tried filling 0.0.0.0 for the RT target?  You can do this in MAX under remote systems, as seen in the attachment.

  If you use the TCP screws, you can force the operating system not to solve the remote addresses, as shown here:

  http://digital.NI.com/public.nsf/allkb/011F5615859F5694862572580080C501?OpenDocument ".
  
  I put the DNS and gateway on the RT to 0.0.0.0 and most (99%) to hang it to the top has disappeared. even with ethernet to the outside world disconnected. The host has still some crash (ie. something tries to access the Ethernet (call)). What I still have to study.

  Thanks for your help

  Tom

• public or private vcs-e dns?

  in my current setup my vcs-e uses local dns server, but I read there a public need, even if currently jabber works very well without any problem and mcu conferences work ok, my questions is do the need of vcs-e a public dns? and why? It would explain why I can't make calls outside my network when my video units are stored in the vcs - c?

  For PT. 1 & 2, you establish a B2B call to the external endpoints.

  # 3: Jabber Cisco will use a different area, which is the crossing area and if you say that it works if the area is in place.

  You have a DNS Zone configured on your VCS-E?

  DNS zone is used to find systems that are hosted on the outside (which are not locally, for example, a company). Destination alias are sought by a name using a DNS lookup.

  # 4: After creating a DNS on VCS - E Zone, you must create a search rule that will target your DNS Zone. See the configuration guide on and go through the task of 11 to 13 on p. 24-28.

  http://www.Cisco.com/c/dam/en/us/TD/docs/Telepresence/infrastructure/VCs/config_guide/x8-7/Cisco-VCs-basic-configuration-control-with-Expressway-deployment-guide-x8-7.PDF

  For #5. For SIP using B2B calls, see VCS for Cisco IP using the Port for Firewall Traversal Deployment Guide on pages 8-11 for a list of ports.

  http://www.Cisco.com/c/dam/en/us/TD/docs/Telepresence/infrastructure/VCs/config_guide/x8-7/Cisco-VCs-IP-port-usage-for-firewall-traversal-deployment-guide-x8-7.PDF

  Also try to test call B2B with this test site:

  [email protected] / * /.

  This tool also allows you to check the records of services/SRV SIP for successful B2B calls. You can check the SIP endpoint domain name you call and your video network SIP domain name if these entries have been found: https://cway.cisco.com/tools/SrvRecord/

  • _sip._udp. Domain
  • _sip._tcp. Domain

  Kind regards

  Acevirgil

• DNS for specific domain (1), Server 5

  Hello.

  Ive got a server running DNS. Computer record is example.com. MX is mail.example.com and so on.

  But the Web page related to example.com:80 is in fact hosted outside my network, so I as the server to use an external DNS for example.com. If he uses the internal DNS, I get a server not found error in safari.

  I can do with the file "etc/resolve/example.com". But which only affects searches locally on the server. Not the customers who use the local DNS server...

  Y at - it another way to force all the users on the network to use external DNS for example.com (adding a host on all clients file works, but isn't very funny)

  Thank you

  El captain

  Server 5

  Hey Josie:

  Not quite sure I understand your question, but I think you're saying: the DNS lookups (on your website DNS record using a public address) work, other computers on your local network when you use the Mac for DNS server, but they * do * work if they use another DNS server. If Yes, this is expected behavior and the only way to have your site properly convert form these machines would be to:

  (A) that other computers on your local network using your Mac server for DNS resolution.

  (B) are the other servers on your local network DNS adds a secondary zone "example.com" with your Mac server as the master.

• Modes of failure in TCP WRITE?

  I need help to diagnose a problem where TCP communication breaks down between my host (Windows) and a PXI (LabVIEW RT 2010).

  The key issues are:

  1... are there cases where to WRITE TCP, a string of say 10 characters, write more than zero and less than 10 characters for the connection? If so, what are those circumstances?

  2... is it risky to use a 1ms timeout value?  A reflection seems to say that I won't get a timeout in uSec 1000 if we use a database of time 1-ms, but I don't know if this is true in PXI.

  Background:

  On the PXI system, I use a loop of PID-100 Hz, controlling an engine.  I measure the speed and torque and control the speed and the throttle.  Along the way, I am in a position 200 channels of various things (analog, CAN, instruments of TCP) at 10 Hz and sending masses of info to the host (200 chans * 8 = 1600 bytes every 0.1 sec)

  The host sends commands, responds the PXI.

  The message protocol is a type of variable to fixed header, payload: a message is a fixed 3-byte header, consisting of a U8 OpCode and a USEFUL of U16 load SIZE field. I flattened a chain structure, measuring its size and add the header and send it as a TCP WRITE.  I get two TCP reads: one for the header, then I have the heading unflatten, read the SIZE of the payload and then another read for that many more bytes.

  The payload can be zero byte: a READING of TCP with a byte count of zero is legal and will succeed without error.

  A test begins by establishing a connection, configuration tips, and then sampling. The stream of 10 Hz is shown on the home screen for 2 Hz as digital indicators, or maybe some channels in a chart.

  At some point the user starts RECORDING, and 10 Hz data go into a queue for later write to a file. It is while the motor is powered through a cycle prescribed target speed/torque points.

  The registration lasts for 20 or in some cases for 40 minutes (24000 samples) and then recording stops, but sampling does not.  Data are still coming and mapped. The user can then do some special operations, associated with audits of calibration and leaks, and these results are stored.  Finally, they hit the DONE button and the mess is written to a file.

  This has worked well for several years, but that the system is growing (more devices, more channels, more code), a problem arose: the two ends are sometimes get out of sync.

  The test itself and all the stuff before configuration, works perfectly. The measure immediately after the test is good.  At some point after that, he goes to the South.  The log shows the PXI, sending the results for operations that were not opposed. These outcome data are garbage; 1.92648920e - 299 and these numbers, resulting from the interpretation of random stuff like a DBL.

  Because I wrote the file, the connection is broken, the next test he reestablished and all is well again.

  By hunting all of this, I triple-checked all my shipments are MEASURES of the size of the payload before send it.  Two possibilities have been raised:

  1... There is a message with a payload of 64 k.  If my sender was presented with a string of length 65537, it would only convert a value U16 1 and the receiver would expect 1 byte. The receiver would then expect another heading, but these data come instead, and we are off the rails.

  I don't think what is happening. Most messages are less payload of 20 bytes, the data block is 1600 or so, I see no indication of such a thing to happen.

  2... the PXI is a failure, in certain circumstances, to send the entire message given to WRITE of TCP.  If she sends a header promising more than 20 bytes, but only delivered 10, then the receiver see the header and wait more than 20. 10 would come immediately, but whatever the message FOLLOWING, it's header would be interpreted as part of the payload of the first message, and we are off the rails.

  Unfortunately, I'm not checking the back of writing TCP error, because she's never not in my test here (I know, twenty lashes for me).

  It occurs to me as I was him giving a value of timeout 1-mSec, since I am in a loop of 100 Hz. Maybe I should have separated the TCP stuff in a separate thread.  In any case, maybe I do not get a full 1000 uSec, due to problems of resolution clock.

  This means that TCP WRITE failed to get the data written before the time-out expires, but he wrote the part of it.

  I suspect, but newspapers do not prove, that the point of failure is when they hit the DONE button.  The General CPU on PXI is 2 to 5%, at that time there are 12 to 15 DAQ field managers to be close, so the instant the CPU load is high.  If this happens to coincide with an outgoing message, well, perhaps that the problem popped up.  It doesn't happen every time.

  So I repeat two questions:

  1... are there cases where to WRITE TCP, a string of say 10 characters, write more than zero and less than 10 characters for the connection? If so, what are those circumstances?

  2... is it risky to use a 1ms timeout value?  A reflection seems to say that I won't get a timeout in uSec 1000 if we use a database of time 1-ms, but I don't know if this is true in PXI.

  Thank you

  If a TCP write operation times out, it is possible that some data did in fact get placed in the buffer, and it will be read by the other side. This is why there is an output bytes written on TCP Write function, to determine what was actually put in the buffer.

  To account for this, you can proceed as follows:

  1. do an another TCP write and send only the subset of the first package that does not get completely passed. Use bytes written to Get String subset for the remaining data.

  2. start with greater delays.

  3. in the case of a timeout, the close link and force a reconnection so that the data of the partially filled buffer not get transformed by the other side.