I am trying to find some ideas on debugging clients and servers. For example, what would be -really great- is to
1. start a debugger with a server (running on a port)
2. start up the client (using a debugger).
Run the client and then trace the processing from the client side to the server side.
How can one accomplish this?
I have downloaded valgrid and Qt Creator - but not sure how one can use both.
I don't have any problem when I'm communicating with one client. The problem starts when I connect another client.The server eventually ignores the older clients and responds only to the latest one.The working mechanism is simple: Accept connections and print messages received from multiple clients.
View 4 Replies View RelatedDoes anyone know how can one improve his debugging skills or how can one narrow down the problem and try to get to the solution ASAP.Or rather how once should approach a problem.I know this is a bit vague question but I want to know how you people approach?
View 3 Replies View RelatedI have squid running on F12 fully updated. Pretty much stock config except bigger cache size.
Over time it seems to start lagging and occupying more memory. Currently using ~400Mb after a couple of months. I'm sure its causing some lag / refreshes because if I turn if off and go direct to internet the same site I had to hit refresh on, loads instantly.
Going through the logs in /var/log/squid I don't see anything suspicious with the untrained eye, whats a better way of debugging it to see where/why the delays are happening? Its a single user setup (for fun really lol) so theres a lot of misses in access.log. cache.log just has a handful of bad img headers which does not line up with lagging websites.code...
I administrat a school in Denmark, with around 40 clients runnig xp pro and a windows 2003 server, but i read about the possibility of running a linux server, with thin clintes that can run from the server, if it has network pxe boot.
I was wondering if anybody now any links to a good how to page, on what is needed on the setup side of the server, and clients. To make it work. And i have to use my dhcp from the win 2003 server. Is that possible.
Im having a problem with our pxe environment. We have around 200 clients per server to boot from tftp and when we hit 250 the service just freezes. So, our options are to either add more servers or move to a more robust protocol. Is this feasible?? How can clients boot from ftp?
View 3 Replies View RelatedI install clonezilla onto ubuntu but I cant get the clients to boot and the steps i find in the tutorials don't really help or apply.
View 5 Replies View RelatedI'm working on CUPS server here now, I am new to the whole Fedora area, I'm starting to like it, tackling one service after the other. I have cups, which I don't recall installing but was there guess its a default. So I added a printer on my server, that was on a 10.0.1.1 block, added it as lpd://10.0.1.1/lab3printer. Ok that worked and printed from my server, but my problem is when other machines try to add the printer. I continue getting this problem
Alberto "recoverable: Network host '10.0.11.25' is busy; will retry in 30 seconds..."
On the computer it was added as printer lpd://10.0.11.25/alberto because my server has that IP and printer well named it alberto. I followed what this said with the xined.d [URL].
I've done this before, maybe ten times. This time is different. I don't know why, but Samba will not allow any clients to connect.
I've done:
- installed samba
- setup the samba shares
- have a samba user/passwd
- authentication = users
- punched in the samba stuff for firewall
- workgroup is set right
What the heck? I cannot get any client to connect. Not even the server machine can connect to itself through a client. What am I missing here???
Just for the record, I'm trying to connect to \SERVER:
Code:
Code:
I removed a whole lot of comment lines in the config file.
I have got a 10.4 LTS LTSP server running as i needed it should do.
When i boot-up one of the terminal it sees the DHCP and starts loading from the LTSP all working ok.... when it gets the login screen some of the terminals get the box on the screen to enter the user name and password. the other terminal dose not.
The work around i have got is that i have to click on the blank screen at the bottom left to get the "pick a session" button then i can login and can login as normal.
When all the clients login all is well, And works as if the system was loaded locally its fast and at the mow its reliable. The only thing that is not working as it should is the log in screen.
My brother and I want to set up a server off of which we would provide the processing power for several thin clients. Is it possible to serve the thin clients with images of Windows XP to run?
View 3 Replies View RelatedIs there a way to use dhcpd to assign vpn clients their IP and configuration?
I'd like to have dhcpd listen on br0 (already set as 10.0.0.1) so that devices conecting through eth1 and tap0 (should I be using tun?) will get the same address pool.
My server and clients (NFS and NIS) are in continuous attack via ssh. Somebody is trying to guess password and login, and making port 22 busy.What are different ways to stop this attack?I am thinking to block this ip in iptable but I have no good idea because I have not done this before. Any special consideration do I have to take while doing this thing? How is it done and which file does it modify?
View 14 Replies View Relatedis it possible to create a pxe boot server on fedora for windows clients?
View 2 Replies View RelatedI'm having a problem with NFS. I'm trying to mount /home, which is on the server, to the client nodes. The server is currently running FC14 (64 bit) and I'm in the process of updating all the clients nodes to the same OS. Currently, all the client nodes are running FC8 (32 bit) and are capable of mounting /home on the server. However, the one client node that I have updated to FC14 is having problems mounting /home. I can ssh to the node with no problem however I get the following message:
Could not chdir to home directory /home/myuserid: Permission denied. Now, if I excute the following command: "sudo mount -a" I get no errors and now I can see my home directory.
I would like to know whether ldap can be used to authenticate wireless clients with my server.server and clients are connected to a wireless router and i am able to get wireless adapter work in my ubuntu. Is there any anything extra which is required or the openldap server will work for wireless clients?
View 1 Replies View Relatedalright so i set up dhcp server and my clients are getting ip's, can ping each other, and can ping/ssh the server. but nowhere beyond that.
however if i ping an externel site, i get its IP addr, but no pings (100% loss)
im ripping my hair out over this. i know that iptables is right, but i dont know about dns
idk if this helps:
Code:
pavel@ubuntu-server:~$ cat /etc/network/interfaces
auto lo br0 eth0 eth1
iface lo inet loopback
#mapping hotplug
[Code].....
I do not understand this command well. Yes, I have looked at man route and that whilst that gives lots of information about the switches I cannot see it in context. I have a server with two nics. One to the Internet (eth1) and one to the lan (eth0). I use pppoe and when it is running I get a virtual adapter appear in ifconfic called ppp0 which shows the public DNS and ISP session IP. I entered the command:
route add -host (gateway IP) dev eth1
and get the Internet to appear on the server. However, I do not get the Internet to the clients. I have turned off the firewall to be sure that this is not the problem.
We have been using Ubuntu 8.04 with ltsp the server is Intel P4 with 2 GB Ram and the 8 client consist of either Atom or old P3 and P4. Now we want to increase the clients and want to upgrade to latest ubuntu 10.04.
I heard AMD does excellent job with LTSP but is it possible to have intel clients and AMD as a server. If not then which the best intel server I can have other than xenon (Bcoz of the price factor i dont want to go for that)
On a Lucid server, dnsmasq is happily running DHCP together with a local DNS; although, in setting up NFS, I seem to have a small problem... I have /etc/exports referencing the hostname of the clients but these IPs change when the DHCP lease is renewed. Unless I restart NFS or run exportfs, I cannot mount the exports on my clients. I know that it would be good to make the all the addresses static; however, I was wondering whether there is another way to configure NFS such as possibly adding in a script to continually monitor /var/lib/misc/dnsmasq.leases and re-export accordingly?
View 3 Replies View RelatedI must be very thick as i cannot seem to get my dhcp clients to connect to the Internet properly.
on my lucid server i installed dhcp3 server and bind9, i can ping and dig all on the local network. on the clients however, as soon as i go out of the local network there's messages like "unknown host www.google.com" or "network is unreachable".
I've successfully built my server, and any fat or thin client that I connect to it boots wonderfully, with great response. I've gone through this exercise because we need a more efficient way of testing computers before delivery to our customers. So, I'm trying to run Passmark's BurnInTest. I've run it before with previous versions (9.something, I think) and it worked well, but I needed to build a new server so we can test more computers concurrently, so I figured I'd get the latest release.
My problem occurs when I try to run BurnInTest - it must have root access to test the local USB, parallel, and serial ports, and the optical drive. For the previous iteration I used a script that dropped into a local xterm session, su'd to a root session, and called the BiT GUI. In this attempt, the same scripts, even when I single-step them manually, results in 'authentication failure' when the su is attempted.
I have enabled the root account and created a password for it in the chroot /opt/ltsp/i386, and rebuilt the image, multiple times, no joy. Using ctrl-alt-F1 I can log in as root, and using dmesg I can see the USB device register when I connect it, so as far as I can tell the root account is alive and well, just not available in a local xterm session for some reason.
I have one local mail server hosted in Mdaemon in my office and ip is 192.168.10.2. My clients can't use the email from the outside. If they want to use the mail, they need to come to office. I want them to use from the outside. How can i set up the mail server. Do i need to host the server on the hosting? I want to synchronize with my local mail server. I don't have the public IP BTW.
View 2 Replies View RelatedI installed and configured LDAP server and client on RHEL5 successfully. Problem is that when I add more than one user on server and clients, It shows error 'invalid user'.When I run the command:-#chown -R user:users /home/user, It shows error 'invalid user'. by step for adding and modifying more users in ldap servers.
View 1 Replies View RelatedHow do clients handle offline syslog servers?Will the log files be buffered locally to be sent to the syslog server when it comes back online, or will any log data generated during downtime be lost in cyber space?
View 1 Replies View RelatedMy Linux server which is running my company website have been hacked. Today I saw a number of clients (customers) with some fun characters entries on my database. Access denial on really clients.
View 2 Replies View Relatedwhat cloud computing is and i think it can help me with some of my clients i want to switch my clients from a normal ubuntu server to a ubuntu cloud. as of right now i have to send out a bill to them and if they dont pay i have to shut down there service till they pay. what i would like to do is to have a cloud where i can sell them based on what they use not a set price like it is now. and have them be able to pay there bill on the cloud and if they miss the bill then the cloud can shut off there service till its payed.
i dont know if this is possible and i have looked everywhere and all i can find is info on other businesses billing and now how to set up a cloud to do this. i wish there was some kind of tutorial for this. if anyone can direct me to some good notes/tutorials that would be very helpful. this could be a big changing point in my business if i can do this. it would save a lot of time and cash.
what are use cases for static ip address for clients or servers.
View 3 Replies View RelatedI'm running a small ejabberd server on a LAN. Everything works fine out of the box except that when certain users disconnect they remain listed as online.
Specifically, Linux users who suspend their computers with their client still open are still listed as online. This is not the case for Windows or Mac clients.
I did some research and fount out that it has something to do with the TCP keepalive timeouts on the server. However I cannot figure out how to set those times.
I have an embedded server running Ubuntu which is on a network with a lot of wireless AP's. The AP's doesn't support SNMP or anything else, so I monitor if they are up or down by simply pinging them continuously.
My question is if there is anything I could install on the server that could provide me with a webpage where I could see the ping time to the AP's? So it just shows a list of the IP's I have told it to ping, and what their latest response time is. This is what I basically need, but if it were more advanced than that, and could give warnings if ping time were to high etc.