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  • Why does pinging a local router return "Destination Host Unreachable"?

    - by Matt H
    I have two tomato routers. One is bridged wirelessly with the other. I have a new server on the network. It's running Ubuntu Server 11.04. They are all connected like this: A - Linux PC B - New Server C - Mac Mini D - Macbook T1 - Tomato 1 T2 - Tomato 2 They are connected like so: A -----+-T1 ==== wireless bridge ==== T2----- ADSL modem | | C & D Connected wirelessly to T2 B -----+ A, C & D do not experience any issues. I have an active SSH session to B from A and it's not experiencing any loss. B, the new server occasionally cannot ping T2 and therefore cannot connect to the internet. However, A can always contact B and B can ping A and B When the network is lost, B can still ping T1, but not T2 yet at the same as B has lost connection to T2, A can still ping T2. Any ideas on what this could be? there is nothing that gives any clues in any of the logs on either router or the linux server. One thing that is interesting is that I set up a ping running between B and T2. T2 has the IP address 192.68.1.1 Here is what I am seeing: From 192.168.1.1 icmp_seq=26 Destination Host Unreachable From 192.168.1.1 icmp_seq=27 Destination Host Unreachable From 192.168.1.1 icmp_seq=28 Destination Host Unreachable From 192.168.1.1 icmp_seq=29 Destination Host Unreachable From 192.168.1.1 icmp_seq=30 Destination Host Unreachable From 192.168.1.1 icmp_seq=31 Destination Host Unreachable From 192.168.1.1 icmp_seq=33 Destination Host Unreachable From 192.168.1.1 icmp_seq=34 Destination Host Unreachable From 192.168.1.1 icmp_seq=35 Destination Host Unreachable 64 bytes from 192.168.1.1: icmp_req=36 ttl=63 time=3.40 ms 64 bytes from 192.168.1.1: icmp_req=37 ttl=63 time=5.70 ms 64 bytes from 192.168.1.1: icmp_req=38 ttl=63 time=2.25 ms 64 bytes from 192.168.1.1: icmp_req=39 ttl=63 time=2.18 ms 64 bytes from 192.168.1.1: icmp_req=40 ttl=63 time=3.12 ms 64 bytes from 192.168.1.1: icmp_req=41 ttl=63 time=2.15 ms 64 bytes from 192.168.1.1: icmp_req=42 ttl=63 time=1.97 ms 64 bytes from 192.168.1.1: icmp_req=43 ttl=63 time= And it cycles to being reachable and not. So I guess you could say the question is, why is the router responding that it cannot be reached?

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  • General type conversion without risking Exceptions

    - by Mongus Pong
    I am working on a control that can take a number of different datatypes (anything that implements IComparable). I need to be able to compare these with another variable passed in. If the main datatype is a DateTime, and I am passed a String, I need to attempt to convert the String to a DateTime to perform a Date comparison. if the String cannot be converted to a DateTime then do a String comparison. So I need a general way to attempt to convert from any type to any type. Easy enough, .Net provides us with the TypeConverter class. Now, the best I can work out to do to determine if the String can be converted to a DateTime is to use exceptions. If the ConvertFrom raises an exception, I know I cant do the conversion and have to do the string comparison. The following is the best I got : string theString = "99/12/2009"; DateTime theDate = new DateTime ( 2009, 11, 1 ); IComparable obj1 = theString as IComparable; IComparable obj2 = theDate as IComparable; try { TypeConverter converter = TypeDescriptor.GetConverter ( obj2.GetType () ); if ( converter.CanConvertFrom ( obj1.GetType () ) ) { Console.WriteLine ( obj2.CompareTo ( converter.ConvertFrom ( obj1 ) ) ); Console.WriteLine ( "Date comparison" ); } } catch ( FormatException ) { Console.WriteLine ( obj1.ToString ().CompareTo ( obj2.ToString () ) ); Console.WriteLine ( "String comparison" ); } Part of our standards at work state that : Exceptions should only be raised when an Exception situation - ie. an error is encountered. But this is not an exceptional situation. I need another way around it. Most variable types have a TryParse method which returns a boolean to allow you to determine if the conversion has succeeded or not. But there is no TryConvert method available to TypeConverter. CanConvertFrom only dermines if it is possible to convert between these types and doesnt consider the actual data to be converted. The IsValid method is also useless. Any ideas? EDIT I cannot use AS and IS. I do not know either data types at compile time. So I dont know what to As and Is to!!! EDIT Ok nailed the bastard. Its not as tidy as Marc Gravells, but it works (I hope). Thanks for the inpiration Marc. Will work on tidying it up when I get the time, but I've got a bit stack of bugfixes that I have to get on with. public static class CleanConverter { /// <summary> /// Stores the cache of all types that can be converted to all types. /// </summary> private static Dictionary<Type, Dictionary<Type, ConversionCache>> _Types = new Dictionary<Type, Dictionary<Type, ConversionCache>> (); /// <summary> /// Try parsing. /// </summary> /// <param name="s"></param> /// <param name="value"></param> /// <returns></returns> public static bool TryParse ( IComparable s, ref IComparable value ) { // First get the cached conversion method. Dictionary<Type, ConversionCache> type1Cache = null; ConversionCache type2Cache = null; if ( !_Types.ContainsKey ( s.GetType () ) ) { type1Cache = new Dictionary<Type, ConversionCache> (); _Types.Add ( s.GetType (), type1Cache ); } else { type1Cache = _Types[s.GetType ()]; } if ( !type1Cache.ContainsKey ( value.GetType () ) ) { // We havent converted this type before, so create a new conversion type2Cache = new ConversionCache ( s.GetType (), value.GetType () ); // Add to the cache type1Cache.Add ( value.GetType (), type2Cache ); } else { type2Cache = type1Cache[value.GetType ()]; } // Attempt the parse return type2Cache.TryParse ( s, ref value ); } /// <summary> /// Stores the method to convert from Type1 to Type2 /// </summary> internal class ConversionCache { internal bool TryParse ( IComparable s, ref IComparable value ) { if ( this._Method != null ) { // Invoke the cached TryParse method. object[] parameters = new object[] { s, value }; bool result = (bool)this._Method.Invoke ( null, parameters); if ( result ) value = parameters[1] as IComparable; return result; } else return false; } private MethodInfo _Method; internal ConversionCache ( Type type1, Type type2 ) { // Use reflection to get the TryParse method from it. this._Method = type2.GetMethod ( "TryParse", new Type[] { type1, type2.MakeByRefType () } ); } } }

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  • Why are my functional tests failing?

    - by Mongus Pong
    I have generated some scaffolding for my rails app. I am running the generated tests and they are failing. for example test "should create area" do assert_difference('Area.count') do post :create, :area => { :name => 'area1' } end assert_redirected_to area_path(assigns(:area)) end This test is failing saying that : 1) Failure: test_should_create_area(AreasControllerTest) [/test/functional/areas_controller_test.rb:16]: "Area.count" didn't change by 1. <3 expected but was <2. There is only one field in the model : name. I am populating this so it cant be because I am failing to populate the only field. I can run the site and create an area with the name 'area1'. So reality is succeeding, but the test is failing. I cant ask why its failing, because Im sure theres not enough information here for anyone here to know why. Im just stuck at knowing what avenues to go down to work out why the test is failing. Even putting puts into the code dont print out... What steps can I take to track this down?

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  • The best cross platform (portable) arbitrary precision math library

    - by Siu Ching Pong - Asuka Kenji
    Dear ninjas / hackers / wizards, I'm looking for a good arbitrary precision math library in C or C++. Could you please give me some advices / suggestions? The primary requirements: It MUST handle arbitrarily big integers (my primary interest is on integers). In case that you don't know what the word arbitrarily big means, imagine something like 100000! (the factorial of 100000). The precision MUST NOT NEED to be specified during library initialization / object creation. The precision should ONLY be constrained by the available resources of the system. It SHOULD utilize the full power of the platform, and should handle "small" numbers natively. That means on a 64-bit platform, calculating 2^33 + 2^32 should use the available 64-bit CPU instructions. The library SHOULD NOT calculate this in the same way as it does with 2^66 + 2^65 on the same platform. It MUST handle addition (+), subtraction (-), multiplication (*), integer division (/), remainder (%), power (**), increment (++), decrement (--), gcd(), factorial(), and other common integer arithmetic calculations efficiently. Ability to handle functions like sqrt() (square root), log() (logarithm) that do not produce integer results is a plus. Ability to handle symbolic computations is even better. Here are what I found so far: Java's BigInteger and BigDecimal class: I have been using these so far. I have read the source code, but I don't understand the math underneath. It may be based on theories / algorithms that I have never learnt. The built-in integer type or in core libraries of bc / Python / Ruby / Haskell / Lisp / Erlang / OCaml / PHP / some other languages: I have ever used some of these, but I have no idea on which library they are using, or which kind of implementation they are using. What I have already known: Using a char as a decimal digit, and a char* as a decimal string and do calculations on the digits using a for-loop. Using an int (or a long int, or a long long) as a basic "unit" and an array of it as an arbitrary long integer, and do calculations on the elements using a for-loop. Booth's multiplication algorithm What I don't know: Printing the binary array mentioned above in decimal without using naive methods. Example of a naive method: (1) add the bits from the lowest to the highest: 1, 2, 4, 8, 16, 32, ... (2) use a char* string mentioned above to store the intermediate decimal results). What I appreciate: Good comparisons on GMP, MPFR, decNumber (or other libraries that are good in your opinion). Good suggestions on books / articles that I should read. For example, an illustration with figures on how a un-naive arbitrarily long binary to decimal conversion algorithm works is good. Any help. Please DO NOT answer this question if: you think using a double (or a long double, or a long long double) can solve this problem easily. If you do think so, it means that you don't understand the issue under discussion. you have no experience on arbitrary precision mathematics. Thank you in advance! Asuka Kenji

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  • Procedures before checking in to source control?

    - by Mongus Pong
    I am starting to get a reputation at work as the "guy who breaks the builds". The problem is not that I am writing dodgy code, but when it comes to checking my fixes back into source control, it all goes wrong. I am regularly doing stupid things like : forgetting to add new files accidentally checking in code for a half fixed bug along with another bug fix forgetting to save the files in VS before checking them in I need to develop some habits / tools to stop this. What do you regularly do to ensure the code you check in is correct and is what needs to go in? Edit I forgot to mention that things can get pretty chaotic in this place. I quite often have two or three things that Im working on in the same code base at any one time. When I check in I will only really want to check in one of those things.

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  • Changing the background colour of lines in the stack

    - by Mongus Pong
    I have just changed the colour scheme of my Visual Studio 2008 environment to have a dark backround with light text. This is so much easier on the eyes. The only problem is lines that are on the call stack... Those lines that are referred to in this thread here in visual studio some lines of code have light grey background while debugging These lines have a bright grey background, which against my light text means I cannot read the text at all. I have been through every single colour in Tools - Options - Fonts and Colours and cannot find one that matches. How can I change the background for lines on the current call stack?

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  • Does the optimizer filter subqueries with outer where clauses

    - by Mongus Pong
    Take the following query: select * from ( select a, b from c UNION select a, b from d ) where a = 'mung' Will the optimizer generally work out that I am filtering a on the value 'mung' and consequently filter mung on each of the queries in the subquery. OR will it run each query within the subquery union and return the results to the outer query for filtering (as the query would perhaps suggest) In which case the following query would perform better : select * from ( select a, b from c where a = 'mung' UNION select a, b from d where a = 'mung' ) Obviously query 1 is best for maintenance, but is it sacrificing much performace for this? Which is best?

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  • Refactoring SQL

    - by Mongus Pong
    Are there any formal techniques for refactoring SQL similar to this list here that is for code? I am currently working on a massive query for a particular report and I'm sure there's plenty of scope for refactoring here which I'm just stumbling through myself bit by bit.

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  • Active record taking Date.today as yesterday

    - by Mongus Pong
    I have a strange one.. I am doing something like : tip = find (:first, :conditions => ["last_shown = ? or last_shown is null", Date.today]) And then a little later on I do : tip.last_shown = Date.today tip.save When I look at output of these queries, ActiveRecord is doing the first query with todays date as I would expect. However, the send query, ActiveRecord is setting the last_shown date to be yesterdays date. Why on earth would it do this? I have config.time_zone = 'UTC' in my environment.rb. I can use Time.now.utc.to_date instead of Date.today but it makes no difference.

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  • Resizing a UIView - expanding the top

    - by Mongus Pong
    I have a UIView inside of a UIScrollView that I want to resize. I can increase the height easily by : CGRect frame = self.drawinView.frame; frame.size.height += 100; self.drawinView.frame = frame; self.drawinScrollView.contentSize = CGSizeMake(frame.size.width, frame.size.height); And all is good. The above code will create a new area of the view at the bottom of the view that I can fill out. Now when I resize the view, I only want to be repainting the new portion of the view that has just been created. I dont want to have to repaint the whole view. However! I have run into difficulty when I need to expand the top of the view. Doing : CGRect frame = self.drawinView.frame; frame.origin.y -= 100; self.drawinView.frame = frame; self.drawinScrollView.contentSize = CGSizeMake(500, 600); does not work. How can I do this without having to repaint the entire view?

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  • Bring another processes Window to foreground when it has ShowInTaskbar = false

    - by Mongus Pong
    We only want one instance of our app running at any one time. So on start up it looks to see if the app is running and if it is, it calls SetForegroundWindow on the Main Window. This is all good and well ... for the most part.. When our app starts up it will show a Splash screen and a Logon form. Both of these forms have ShowInTaskBar = false. Because of this, if you try to start up another copy of the app when the Logon form is showing, that Logon form is not brought to the front! Especially as the user cant see anything in the taskbar as well, all they figure is that the app is duff and cannot start. There is no indication that there is another instance running. Is there any way around this problem?

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  • How can I map to a field that is joined in via one of three possible tables

    - by Mongus Pong
    I have this object : public class Ledger { public virtual Person Client { get; set; } // .... } The Ledger table joins to the Person table via one of three possible tables : Bill, Receipt or Payment. So we have the following tables : Ledger LedgerID PK Bill BillID PK, LedgerID, ClientID Receipt ReceiptID PK, LedgerID, ClientID Payment PaymentID PK, LedgerID, ClientID If it was just the one table, I could map this as : Join ( "Bill", x => { x.ManyToOne ( ledger => ledger.Client, mapping => mapping.Column ( "ClientID" ) ); x.Key ( l => l.Column ( "LedgerID" ) ); } ); This won't work for three tables. For a start the Join performs an inner join. Since there will only ever be one of Bill, Receipt or Payment - an inner join on these tables will always return zero rows. Then it would need to know to do a Coalesce on the ClientID of each of these tables to know the ClientID to grab the data from. Is there a way to do this? Or am I asking too much of the mappings here?

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  • Why would using a Temp table be faster than a nested query?

    - by Mongus Pong
    We are trying to optimise some of our queries. One query is doing the following: SELECT t.TaskID, t.Name as Task, '' as Tracker, t.ClientID, (<complex subquery>) Date, INTO [#Gadget] FROM task t SELECT TOP 500 TaskID, Task, Tracker, ClientID, dbo.GetClientDisplayName(ClientID) as Client FROM [#Gadget] order by CASE WHEN Date IS NULL THEN 1 ELSE 0 END , Date ASC DROP TABLE [#Gadget] (I have removed the complex subquery, cos I dont think its relevant other than to explain why this query has been done as a two stage process.) Now I would have thought it would be far more efficient to merge this down into a single query using subqueries as : SELECT TOP 500 TaskID, Task, Tracker, ClientID, dbo.GetClientDisplayName(ClientID) FROM ( SELECT t.TaskID, t.Name as Task, '' as Tracker, t.ClientID, (<complex subquery>) Date, FROM task t ) as sub order by CASE WHEN Date IS NULL THEN 1 ELSE 0 END , Date ASC This would give the optimiser better information to work out what was going on and avoid any temporary tables. It should be faster. But it turns out it is a lot slower. 8 seconds vs under 5 seconds. I cant work out why this would be the case as all my knowledge of databases imply that subqueries would always be faster than using temporary tables. Can anyone explain what could be going on!?!?

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  • Speed up this query joining to a table multiple times

    - by Mongus Pong
    Hi, I have this query that (stripped right down) goes something like this : SELECT [Person_PrimaryContact].[LegalName], [Person_Manager].[LegalName], [Person_Owner].[LegalName], [Person_ProspectOwner].[LegalName], [Person_ProspectBDM].[LegalName], [Person_ProspectFE].[LegalName], [Person_Signatory].[LegalName] FROM [Cache] LEFT JOIN [dbo].[Person] AS [Person_Owner] WITH (NOLOCK) ON [Person_Owner].[PersonID] = [Cache].[ClientOwnerID] LEFT JOIN [dbo].[Person] AS [Person_Manager] WITH (NOLOCK) ON [Person_Manager].[PersonID] = [Cache].[ClientManagerID] LEFT JOIN [dbo].[Person] AS [Person_Signatory] WITH (NOLOCK) ON [Person_Signatory].[PersonID] = [Cache].[ClientSignatoryID] LEFT JOIN [dbo].[Person] AS [Person_PrimaryContact] WITH (NOLOCK) ON [Person_PrimaryContact].[PersonID] = [Cache].[PrimaryContactID] LEFT JOIN [dbo].[Person] AS [Person_ProspectOwner] WITH (NOLOCK) ON [Person_ProspectOwner].[PersonID] = [Cache].[ProspectOwnerID] LEFT JOIN [dbo].[Person] AS [Person_ProspectBDM] WITH (NOLOCK) ON [Person_ProspectBDM].[PersonID] = [Cache].[ProspectBDMID] LEFT JOIN [dbo].[Person] AS [Person_ProspectFE] WITH (NOLOCK) ON [Person_ProspectFE].[PersonID] = [Cache].[ProspectFEID] Person is a huge table and each join to it has a pretty significant hit in the execution plan. Is there anyway I can adjust this query so that I am only linking to it once, or at least get SQL Server to scan through it only once?

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  • ActiveRecord date format

    - by Mongus Pong
    I've run into a spot of bother with date formats in our Rails application. I have a date field in our view which I want to be formatted as dd/mm/yy. This is how the user will expect to enter their dates, and the datepicker control uses this format. However, Active Record seems to be expecting mm/dd/yy. If I enter 01/03/2010, this gets put in as 03 January 2010. If I enter 25/03/2010, this gets put in a null. How do I get ActiveRecord to expect Her Majesties date format?

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  • Getting SMB file shares working over a PPTP VPN

    - by Ben Scott
    I'm having issues getting SMB file shares working over a PPTP VPN. The server setup consists of a security device (DrayTek V3300) which passes the PPTP authentication to a SBS2003 server running RRAS. The server is the DC and provides DNS and WINS, the single NIC's name server is set to the NIC's IP (192.168...), and DHCP on the DrayTek sets the server IP as the DNS. If I create a new VPN connection in Win7, leaving everything as default apart from the server, username, password and domain, I can: ping everything by IP address resolve IPs with nslookup using their fully-qualified name, as in nslookup fileserver.mydomain.local ping machines by fully-qualified name, as in ping fileserver.mydomain.local However if I try to access a file share: within Explorer, I get "Windows cannot access ..." with "Error code: 0x80004005 Unspecified Error", using net use z: \\fileserver.mydomain.local\share, I get "System error 53 has occurred. The network path was not found." If I add the machine name to my HOSTS file I can use the file share, which is my last-ditch workaround, but I have a number of VPN users and would rather a solution that doesn't involve me trying to hand-edit system files on computers half a country away. If I set the WINS server explicitly in the connection's IPv4 settings I don't have to use the FQN to ping the machine, but that doesn't change anything else. EDIT: The PC I'm having the issue on is running Win 7 Home Premium. After more testing I actually have two other PCs that work, one W7HP, one XP Home, and another Vista PC that doesn't work (not tested as much as the others), all four on the same internet connection (behind the same router). All of them were tested with a straight-forward, all defaults, new VPN configuration.

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  • Bind9 DNS help with psuedo domains

    - by Tempname
    I have setup a dns server on my home network to manage some apps that I have written for home. Currently I have 3 "domains" that I am using: controller devserver fileserver The first issue that I am having is that when I attempt to ping the parent domain of any of these 3 I am unable to. I simply get ping: unknown host controller. I however can ping any of the subdomains I have setup for these 3 parent domains. The second issue is I am unable to ping any of the 3 parent domains or any child domains from my window machines. I have verified that these domains work on other devices in my house (ipod touch, ipad, cell phone). Any help with this is greatly appreciated Here is bind data file for my parent domain controller: ; ; BIND data file for local loopback interface ; $TTL 604800 @ IN SOA controller. admin.controller. ( 9 604800 86400 2419200 604800 ) ; @ IN NS controller. @ IN A 192.168.1.104 controller IN A 192.168.1.194 admin.controller. IN A 192.168.1.104

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  • HP Procurve Issue Passing Multiple VLANs over a link

    - by MichaelRwat
    Just to start off with I am a Cisco guy that got placed into an HP project. Basic topology overview from outside in: ASA 5505 with two Ethernet connections to a 2910-24 port switch. This switch is then (Cisco Trunking) to a 2626 switch passing vlan (1 untagged and 100 tagged)between them. I created SVI's on each of the switches for both VLAN's for testing purposes. I can not get vlan 100 to pass across this link. I also have trunks configured to AP's off of the switch and can not ping the vlan 100 BVI on the AP's but can reach the vlan 1 BVI. Port 25 on Access layer (2626) connects (trunks) with port A1 of 2610. STP is not running at all on any switch (this is not my network I can't change this nor did I design this) Distribution Sw: MP1-0# show run ip default-gateway 10.100.100.100 vlan 1 name "DATA" untagged 1-22,24-A1,B1 ip address 10.100.100.6 255.255.255.0 no untagged 23 exit vlan 100 name "GUEST" untagged 23 tagged 24-A1 ip address 10.100.102.6 255.255.255.0 exit Access Sw: ip default-gateway 10.100.100.100 vlan 1 name "DEFAULT_VLAN" untagged 1-26 ip address 10.100.100.5 255.255.255.0 exit vlan 100 name "GUEST" ip address 10.100.102.5 255.255.255.0 tagged 15,25 exitt From the ASA I can ping the vlan 100 address of the 2610 but not the 2626 (10.100.102.6)[Not passing the "trunk"] If I plug into an access port vlan 100 of the 2626 I can ping the SVI for vlan 100 as intended. I can not ping across the "trunk" over vlan 100 but I can across vlan 1. There may be something obvious I'm missing but please review my configuration and thank you for the assistance.

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  • Xen networking is inconsistent in multiple ways

    - by WildVelociraptor
    I've been running xen for a few weeks now on an Ubuntu 12.04 server. I've got 3 guests: a Windows Server 2003 guest, an Ubuntu guest, and a Windows 7 Guest. My Server 2003 guest seems to work fine; I can ping it from the network, the hostname resolves correctly, and it can see the internet. This guest is attached to xenbr0, and its IP is 10.100.1.21. My Win7 guest is what is driving me crazy. I use the same configuration script as a base, changing the important parts (hostname and boot disk, mainly). It installed correctly, and is currently running, but I am unable to ping this guest. It's hostname is "alexander", with an IP of 10.100.1.22. It is also using xenbr0. The guest can ping the firewall and various IP addressess, but seems unable to resolve hostnames. Now heres the weird part: when I use rdesktop (RDP client) from my laptop (not the xen host) to connect to alexander, it works just fine. It apparently resolves the hostname fine, and does the same with the IP address. So, can someone tell me why I can access this guest using RDP, but not using ping, nslookup, traceroute, etc? It's apparently invisible to all but RDP. Also, is it okay to use two guests on the same bridge, or do i need different ones for each guest? Thanks in advance for any help. Regards

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  • Adding 2008 Server to 2008 Domain

    - by Phillip
    Hello, I'm trying to create a lab for testing before I deploy solutions, I'm no experienced IT Administrator, and therefore I come here for help. I'm running 2 Virtual Servers on the same machine on a local connection between those two. They'are able to ping each other. Their names is TSDATA1 and TSDATA2 where TSDATA1 is the Domain Controller. I am able to ping between those two, on both "ping TSDATA1" and "ping 10.0.0.1" which is the IP address of TSDATA1. The IP address of TSDATA2 is 10.0.0.2. I'm trying to join the domain with TSDATA2 both I'm getting this error when trying: Note: This information is intended for a network administrator. If you are not your network's administrator, notify the administrator that you received this information, which has been recorded in the file C:\Windows\debug\dcdiag.txt. The following error occurred when DNS was queried for the service location (SRV) resource record used to locate an Active Directory Domain Controller for domain tsdata.local: The error was: "DNS name does not exist." (error code 0x0000232B RCODE_NAME_ERROR) The query was for the SRV record for _ldap._tcp.dc._msdcs.tsdata.local Common causes of this error include the following: The DNS SRV records required to locate a AD DC for the domain are not registered in DNS. These records are registered with a DNS server automatically when a AD DC is added to a domain. They are updated by the AD DC at set intervals. This computer is configured to use DNS servers with the following IP addresses: 10.0.0.1 One or more of the following zones do not include delegation to its child zone: tsdata.local local . (the root zone) For information about correcting this problem, click Help. I've figured out it has something to do with DNS lookup, but I have no clue what to do. Can anyone help?

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  • Need Routing help (tagged/untagged)

    - by TheCleaner
    I really need some help trying to figure some "basic" routing. My brain is fried from being sick for a week and I'm not thinking clearly. Picture below describes my "setup". I'm trying to accomplish routing a user from their workstation to the Juniper SSG520 and then "OUT" through the internet connection. I can't move the connection as it is physically located where the user's switch is. Here's what I CAN do at this point: I can ping from the Juniper SSG520 eth3/3 to 6x.xxx.253.116 from 6x.xxx.253.114 I can ping from the x450 in the top right to 6x.xxx.253.112 from 6x.xxx.253.116 What I CANNOT DO: I cannot ping from the SSG520 eth3/3 to 6x.xxx.253.112 from 6x.xxx.253.114 (basically from the Juniper box to the gateway. I've tried changing port 1 in the x450 VLAN 666 as tagged but when I do that then I can't even ping from the Juniper SSG520 eth3/3 to the VLAN on the x450 (6x.xxx.253.116). I need to route traffic out the eth3/3 interface on the SSG520 THROUGH the 2 x450 Switches and out the internet connection. The caveat is that the 2 x450 switches are connected via fiber over distance and have tagged VLANs in them for the routing. Thoughts? http://img251.imageshack.us/img251/7752/drawing1.jpg

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  • server and user directly connected no pinging...

    - by jtzero
    I have a server(fedora 12) with two nics on it, directly connected to say 192.168.1.0 and 192.168.2.0 the route table looks like this Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.1.0 192.168.1.1 255.255.255.0 U 0 0 0 eth0 192.168.2.0 * 255.255.255.0 U 0 0 0 eth1 eth0 = 192.168.1.15 eth1 = 192.168.2.1 and a directly connected user (Mythdora) on the 192.168.2.0 network with ip 192.168.2.2 and route table like so Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.2.0 * 255.255.255.0 U 0 0 0 eth0 the cable is a crossover and it works all three nics work -- connected my laptop to either end and assign it a valid 192.168.2.0 ip the pings will work. In fact if I disconnect the server side and plug the eth cable into the laptop and have thte box ping the laptop continually remove the eth cable and plug it back into the server both sides ping... unfortunately the box realizing it's connected to a different pc wipes its route table after say ten minutes or so. if I do a trace route from a box on the 1.0 network to the servers 192.168.2.1 interface never get a reply from it. as a note at one point I could ping the server from the 192.168.2.2 box but the server couldnt ping the 192.168.2.2 box.

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  • DL380 G7: Not able to access ILO on DL380 via ssh from a client

    - by user117140
    I have problem where I can't access my ILO(ssh to ILO IP) thru client which is in different network.I am able to ping ILO IP thru this clinet but ssh access is not possible. Is it possible to have ssh to ILO IP from a client which is in different network? FYI, from the same client I can do ssh to server application IP but ssh to this server ILO IP is not possible. Kindly help? Some more info added: ILO IP address is 10.247.172.70 and its VLAN is different than Client VLAN. Client IP address is 10.247.167.80. ping to ILO IP from this client is possible but not ssh. I can do ssh to ILO IP if I try to do it from the server(hostname:node1) having ILO port or from the other node of this cluster itself,So ssh login is enabled. [root@node1 ~]$ssh -v 10.247.173.70 OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to 10.247.173.70 [10.247.173.70] port 22. [root@node1 ~]$ping 10.247.173.70 PING 10.247.173.70 (10.247.173.70) 56(84) bytes of data. 64 bytes from 10.247.173.70: icmp_seq=1 ttl=254 time=0.283 ms 64 bytes from 10.247.173.70: icmp_seq=2 ttl=254 time=0.344 ms 64 bytes from 10.247.173.70: icmp_seq=3 ttl=254 time=0.324 ms 64 bytes from 10.247.173.70: icmp_seq=4 ttl=254 time=0.367 ms

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  • Monitoring multiple sites on a single server using OpsView

    - by Kev
    We have several web servers. On each of these servers there can be ~250 web sites. I need to add a HTTP check for each site on each server. Each site has a reserved host header that we know can always be resolved in the format of: w10000.hostchecks.mycompany.com w10020.hostchecks.mycompany.com w11992.hostchecks.mycompany.com ..and so on.. What I want is for there to be a master ping check on the web server's main IP address and then separate HTTP checks for each of the sites on the server. If the master ping test fails then I want the HTTP tests to cease until the master ping check goes OK. I had a stab at this and tried do the following: Create a parent host that does a ping check on the server's main ip address (e.g. server is named WEB0001). For each of the sites that reside on WEB0001: Create a separate Host with a Primary Hostname of wXXXXX.hostchecks.mycompany.com Make WEB0001 the parent host Add a monitor (HTTP check to a special url that is mapped into each site using a virtual directory: H- $HOSTADDRESS$ -u /__hostcheck/IsAlive.aspx -w 5 -c 10 -p 80 However I find that if I down the parent server (WEB0001) the http checks seem to continue. Am I going about this completely the wrong way?

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  • Netbook (Samsung N220) on Ubuntu 10.04 slows down WiFi for other computers

    - by Joachim
    I encountered a really odd problem with my new netbook. I am running Ubuntu 10.04 on a Samsung N220 Mito. So far everything worked fine. Now I tried the machine for the first time in our work group where we have a wifi (with internet access) for all laptops. The wifi is controlled by a computer running Suse 9.3 which provides a DHCP server and imposes a firewall. At the moment there is only a macbook in the wifi, where no problems with the internet or wifi connection are encountered. Now coming to my actual problem: In addition to the macbook i connect the Samsung N220 to the Wifi. Problem: My download speed is for some reason limited to 70KB/s max. This is neither a limitation of the server/website i browse on, nor a configuration of the netbook: at home i have 500KB/s download speeds. Furthermore, it is not a default limitation for "untrusted" or "new machines" in the wifi, as for instance other new laptops get full speed internet with our wifi. Problem: Once the Samsung N220 is generating traffic in the wifi, the wifi is slowed down dramatically for all other machines: I run a ping to the router from the macbook. The ping times with the N220 ideling are 2-6ms. When I start downloading or browsing in the web with the N220 the ping speed drops to 800ms. Vice versa, when the macbook is generating the traffic the ping of the N220 to the rooter stays constant at around 2-6ms. So clearly, it is some problem originating from my netbook or maybe its treatment in the wifi. Thanks for any help

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