Networking :: NFS Client - Mount Only Works With Proto=tcp While Iptables Is Running

May 17, 2011

Client is running Oracle VM Server 2.2.1 (kernel 2.6.18-128.2.1.4.37.el5xen). Storage is a NetApp 3210 (NFS configured to use TCP).

Iptables on client has udp and tcp ports 111, 2049 and the NFS server ports opened. Info retrieved using: rpcinfo -p NetApp

When trying a manual mount ...

But when using the proto=tcp option, it works ...

Stopping iptables also works (I can manually mount the share without using proto=tcp).

Is the mounting process somehow trying to negotiate first using udp which the Netapp doesn't respond and hence it fails by timing out?

Can I configure iptables such that I don't have to use the proto=tcp option? Or is there another configuration file I can tweak so that I don't have to use the proto=tcp option?

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General :: NFS Client & Stopping Iptables Also Works

May 16, 2011

Client is running Oracle VM Server 2.2.1 (kernel 2.6.18-128.2.1.4.37.el5xen). Storage is a NetApp 3210 (NFS configured to use TCP). Iptables on client has udp and tcp ports 111, 2049 and the NFS server ports opened. Info retrieved using: rpcinfo -p NetApp When trying a manual mount.

[Code]....

stopping iptables also works (I can manually mount the share without using proto=tcp). Is the mounting process somehow trying to negotiate first using udp which the Netapp doesn't respond and hence it fails by timing out? Can I configure iptables such that I don't have to use the proto=tcp option? Or is there another configuration file I can tweak so that I don't have to use the proto=tcp option?

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I mistakenly ran 'iptables restart' on a server that was not set to run iptables. Immediately, the server quit making outgoing connections on port 80. It has problems completing a traceroute when another machine on the same VM Host can do everything just fine. One of our best networking technicians diagnosed it as issues with the TCP/IP stack on the OS.

I know that iptables is off, allowing all trafffic incoming/outgoing.

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Nov 12, 2010

I have an Ubuntu 10.10 server and client. The server is stable, but the client crashes when writing to an nfs mount.The server has a software RAID, and I have tried every combination I can think of for mounting the share (udp, tcp, write size, nfs, nfs4 and so forth).

I don't have any security on the share, and it only appears to happen when writing to the share (so far). It happens fairly consistently when writing large files (over one GB). The copy starts to stall/start, then the whole interface freezes. I can't drop to other levels (ctrl-alt-f1), but there is still disk activity, and I had it beep at me after a freeze when I clicked several keys....

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I'm trying to open up some ports to connect via vnc to a server running Centos 5.5. I've edited /etc/sysconfig/iptables everything *looks* fine, but I still can't seem to get access to the port I've opened (I added some newlines for clarity between commands):

[Code]....

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Jul 16, 2010

I am working on a NFS server embedded on a PowerPC plateform (4650EX, 512Ram, 1 GB Ethernet) but i can't mount my exports folders from my client. Here are messages :-- server side :

$ tail /var/log/message
Dec 11 23:35:45 canyonlands mountd[1345]: authenticated mount request from 147.138.27.17:620 for /mnt/ssd (/mnt/ssd)

[code]....

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Networking :: Running Foxpro On Centos ( Server ) Via Winxp Client?

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My office is on migrating to UNIX system. I am configuring Centos as our server including some program will be running on it. But one of the problem is we use foxpro for operating some program on server directly. I can run that program on Centos using DOSBox. My question is how can i run that program on winxp client that connected to network through samba to that program on server? so my plan is just give the shortcut and link it to server. I have tried to open it but not work.

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May 14, 2010

Both server (web01), in DMZ, and client (app01), intranet, are Linux OEL5.5.

A few hints follows:

1- I ssh to web01, in DMZ, from a intranet machine on my desktop, export my DISPLAY, and try to bring up xclock; nothing happens.

2- traceroute from web01 to app01 fails.

3- NFS mount from web01, nfs server, to nfs client, app01, fails.

How should my network configuration on web01 or app01 be to make this NFS mount from web01 to app01 work?Each server has 4 NICs, I've only used eth0.

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Slackware :: Sudo: Umount Works, Mount Not Works?

Jul 8, 2010

I've got a problem in doing sudo working for mounting things (e.g. usb pen or optic discs). Details:The OS: Slackware 13.0The response to sudo -l command:

Code:
User user1 may run the following commands on this host:
root) /sbin/shutdown -h now, /sbin/shutdown -r now

[code]...

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Networking :: Configure Nfs Mount Disk To Samba Share For Windows Client ?

Nov 8, 2010

I am not able to configure nfs mounted disk for shareing samba. i have a server X. which configure samba for windows XP client this is done. now i have export X server samba share disk to mount Y server using nfs. this is mount and ok. but i don't share this disk using Y server samba configure.

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Ubuntu Networking :: Can't Access Work Remote Desktop Via The Terminal Server Client On Wired Box Running 10.10?

Dec 3, 2010

I am at a loss. I can not access my work remote desktop via the terminal server client on my wired box running Ubuntu 10.10. My wireless laptop is able to connect right away once I established the VPN connection. The VPN connection is established on both boxes with no problems.

When I tried the Terminal Server Client on my wired boxed, it says it can not establish a connection. Yet my wireless box gets connected immediately!

I check the /etc/dhcp3/dhclient.conf and the /etc/resolv.conf to see if there were any differences, but they are essentially the same. When I have the vpnc connection, they both recognize it and I am able to ping the IP address shown when I do a "ifconfig" on the terminal.

What can be the problem? Anything I need to configure on a wired computer versus a wireless one? What else can I check?

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am currently using Windows 7 across my networked PCs at home.

I've just received my new Samsung N250 Plus Netbook which comes with Windows 7 Starter (yuk). I read a post on Ebuyer from someone who has installed ubuntu on his N250 so thought I'd give it a go tonight.

My main concern is whether my wi-fi card (Broadcom 802.11n according to windows) will work when I remove windows and install ubuntu. I intend to use the netbook for internet use only while working abroad.

Is it possible to test it works by running ubuntu from my USB stick first (without removing windows 7)?

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Jun 3, 2010

i set up a dmz to have a internet web server and ftp server, and ssh only from local network, so i wrote a iptables script to load during boot :

[Code]...

The problem is that everything works fine ( i have the same rules for other services such as samba, nfs, mysql on another server) BUT ftp there is no way to make it work. not even locally.when i try to connect, i log in, but while listing the directory i get MLSD ... and it hangs like this for a moment, then i get error message "connection time out" , "impossible to list directory". if i turn off the iptables script no problem,ftp works fine.. but why all services work and ftp no?

how do i have to modify the rules? what is strange also is that if i set as OUTPUT policy "accept", the server seems to be offline."host unknown" error message. I was thinking the rule INPUT is fine cause at least i can login, but the dir list is not going out, so gotta modify output rules. or state?

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I'm running Ubuntu 9.10 Karmic and XBMC Live.I get error messages which seem to relate to openvpn.So I tried to remove it with the remove command. This is what I getQuote:

@XBMCLive:/home$ sudo apt-get remove openvpn
Reading package lists... Done
Building dependency tree

[code]....

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Jun 4, 2009

if I use the final flag, postfix loggs to /var/log/messages, not to /var/log/maillog.What I am doing wrong?regards ralfHere my config:

options {
sync (0);
time_reopen (10);

[code]....

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Red Hat :: Ssh Client Works On All But One Machine

May 30, 2010

I have RHEL 4 U7 installed on 4 machines, with approximately same configuration. yesterday i was trying to set up public key authentication for ssh on them to be able to run some automated jobs but i had a problem with one particular machine: when used as an ssh client to access the other 3, it kept prompting for a password. the configuration worked on the other 3, they can be accessed from each other with no problem. they can also access machine 1 - the one that has the ssh client problem - too with public key authentication.

When i run ssh -vv on machine one i get the following output :


Code:

This is my machine 1's ssh_config file:

Code:

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Security :: Allowing Dyndns Client - Update Iptables Frequently?

Sep 11, 2010

I am using dyndns to keep track of my smartphone's ip address. The idea is to be able to ssh into my home network, protected by an iptables firewall. If I use the command: # iptables -I INPUT 9 -s myname.dyndns.org -p tcp -m tcp --dport 22 -j ACCEPT it updates using the current ip address, but the next time I get an ip address update to my phone and update dyndns to properly provide nslookups, this is not being updated in iptables unless I restart my firewall. Is there a better way to do this?

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Debian Multimedia :: MSN Client That Works On Squeeze?

May 16, 2010

Tried to install aMSN using Sid package... can't do it because no TK8.5. Installed TK8.5 and aMSN, now I get another strange message ...

Error in startup script:

OK ...

Let's check out 'Empathy IM Client' , no longer any support for MSN because ...?

Tried to setup Mercury which needs Java. Go to run Mercury, no java!

Had to set up Pidgin so that I could go on msn!

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Server :: Nis Client On Centos Not Working With Suse Server / But Works With Suse Nis Client

Jun 25, 2009

I have a Nis server on Suse 11 which is configured using Yast and nis clients on Suse and CentOs .All clients which is on the Suse Os is working fine. But on CentOs , users couldn't login using nis username.I have mounted home directory using nfs in fstab . I can switch to nis users homedirectory only when i am root. But nis users could'nt login on reboot.' ypcat passwd username ' is showing the output . No selinux is enabled in the client .Is there is any problem with Suse server to Centos Client in nis ??

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General :: Any IMAP Web Client - Or Something That Works Similarly To Outlook Web Access?

Feb 3, 2011

Is there any Linux software that fetches emails from let's say 3-d party imap server (ex imap.gmail.com) and allows you to access it in nice format through web interface.

So - if I run my own LAMP server I could just type in my ip address and access emails/calendars.

I guess something like Outlook Web Access but free and for Linux?

Is that what Zimbra is?

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Ubuntu Security :: Both Ufw And Iptables Running Together?

May 23, 2011

Can I have both ufw and iptables running together? My server is currently using ufw, if I add an iptables rule will it have any effect?

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Server :: After Running Iptables -F Goes Offline?

Jan 3, 2011

After running iptables -F my server goes offline???

Isn't that suppose to flush the iptables, so it will allow all traffic?

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Server :: Allow Mount In Iptables For Specific Ip?

Aug 1, 2010

how to allow mount in iptables for specific ip?

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CentOS 5 Server :: Ldap - Ldapsearch And Getent Works From Client But Cannot Login

Jan 26, 2009

So I've configured ldap on Centos5 64 bit and I can run "ldap search" and "gentent passwd" on the client/server and it shows my users info.

But I can't login via the cli or GUI.

I can login by doing;

su - username

at the client or server but I can't login by issuing;

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OpenSUSE Network :: X11 Forwarding - Windows Client Works But It's Doesn't - Cannot Connect To X Server

Jan 20, 2010

I have x11 forwarding enabled in /etc/ssh/sshd_config on a suse 11.2 32 bit box running kde I can open x apps on a windows machine using xming and putty just fine, but when I boot the same machine into suse 11.2 64 bit using kde and try using konsole I get: cannot connect to x server

The command I'm using to log in is: ssh -X -l username host I doubt the problem is with the server I'm logging into or it wouldn't work in windows, not really sure what to look for as I've never had a problem using x11 forwarding from a linux client before only windows ones

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Networking :: Connecting Debian Client To Voyager Client Via Crossover Cable?

Jan 6, 2011

trying to create a "local network" by directly connecting an IBM Thinkpad with Debian Linux installed on it to an Alix computer running Voyager Linux. I'm following a "how to" I found to create a music server, hence the requirement. My issue is I can't get a static IP address to be configured on the Debian machine.I've trawled the net and have found the instructions about editing the /etc/network/interfaces and have tried to do this. First I tried to get DHCP working so I could connect the Debian machine to the net and this proved successful. I edited the interfaces file to look as follows:

# The loopback network interface
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp

Then I tried adding a static IP address to the machine. As this is a network purely between two machines I made up the IP addres and used 192.168.0.1 and used a NetMask calculator to give me a NetMask of 255.255.255.254 (I told the calculator there would be 2 machines on the network). I then edited the interfaces file as follows:

# The loopback network interface
auto lo
iface lo inet loopback

[code]....

I re-booted the machine (ifdown eth0 followed by ifup eth0 keeps saying that eth0 hasn't been configured - a problem there that I don't understand), but during boot up time it failed to assign the Static IP address to eth0 and made me go into SU mode. To fix it I simply replaced the interface file with the static IP inputs with the file that had the DHCP entries (I'd made a copy of the DHCP file), and re-started the machine. Everthing came up fine. So the first question is how do I get a static IP address to be assigned to eth0 such that whenever I shut down and restart the machine the static IP address is always loaded?

The second question is around creating the network via the cross over cable. From what I've found via Google, all I should have to do is create a static IP address on the Debian machine and a static IP address on the Voyager machine. Once they're connected by the cross over cable they should see each other. Is that correct, or do I have to do anything else?

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Jan 25, 2011

In my server the iptables and ip6tables services are not running. But still i am getting some iptables and ip6tables related alerts on my /var/log/messages. My technical leader told me that there might be some mis-configuration in iptables configuration file. But i didnt see anything wrong.

Quote:

Quote:

What does it mean "Jan 25 11:01:32 beteduibsrv3 avahi-daemon[3308]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::226:b9ff:fefc:6ec4."

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