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  • Cisco Nexus 5000 Vs. UCS 6100

    - by radius
    Hello, I'm a bit lost when I take a look to Nexus 5000 and UCS 6100. The description of Nexus 5000 is quite clear and I see what it does but the description of the UCS 6100 is a bit unclear for me. Could someone told me what would be the difference between a Nexus 5000 with all port at 10G and an UCS 6100 with all port at 10G ? Thanks,

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  • Simulated NAT Traversal on Virtual Box

    - by Sumit Arora
    I have installed virtual box ( with Two virtual Adapters(NAT-type)) - Host (Ubuntu -10.10) - Guest-Opensuse-11.4 . Objective : Trying to simulate all four types of NAT as defined here : https://wiki.asterisk.org/wiki/display/TOP/NAT+Traversal+Testing Simulating the various kinds of NATs can be done using Linux iptables. In these examples, eth0 is the private network and eth1 is the public network. Full-cone iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to-source iptables -t nat -A PREROUTING -i eth0 -j DNAT --to-destination Restricted cone iptables -t nat POSTROUTING -o eth1 -p tcp -j SNAT --to-source iptables -t nat POSTROUTING -o eth1 -p udp -j SNAT --to-source iptables -t nat PREROUTING -i eth1 -p tcp -j DNAT --to-destination iptables -t nat PREROUTING -i eth1 -p udp -j DNAT --to-destination iptables -A INPUT -i eth1 -p tcp -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -i eth1 -p udp -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -i eth1 -p tcp -m state --state NEW -j DROP iptables -A INPUT -i eth1 -p udp -m state --state NEW -j DROP Port-restricted cone iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to-source Symmentric echo "1" /proc/sys/net/ipv4/ip_forward iptables --flush iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE --random iptables -A FORWARD -i eth1 -o eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT iptables -A FORWARD -i eth0 -o eth1 -j ACCEPT What I did : OpenSuse guest with Two Virtual adapters - eth0 and eth1 -- eth1 with address 10.0.3.15 /eth1:1 as 10.0.3.16 -- eth0 with address 10.0.2.15 now running stund(http://sourceforge.net/projects/stun/) client/server : Server eKimchi@linux-6j9k:~/sw/stun/stund ./server -v -h 10.0.3.15 -a 10.0.3.16 Client eKimchi@linux-6j9k:~/sw/stun/stund ./client -v 10.0.3.15 -i 10.0.2.15 On all Four Cases It is giving same results : test I = 1 test II = 1 test III = 1 test I(2) = 1 is nat = 0 mapped IP same = 1 hairpin = 1 preserver port = 1 Primary: Open Return value is 0x000001 Q-1 :Please let me know If any has ever done, It should behave like NAT as per description but nowhere it working as a NAT. Q-2: How NAT Implemented in Home routers (Usually Port Restricted), but those also pre-configured iptables rules and tuned Linux

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  • What does this UDP Packet mean ?

    - by asksuperuser
    I'm total newbie at tcp/ip and I was experimenting with Wireshark. What this mean: 1824 578.194204 xxx.xxx.xxx.xxx yyy.yyy.yyy.yyy UDP Source port: 17500 Destination port: 17500 In data I can see that my user pc name is sent (happily it's a generic name): does this mean someone is trying to hack my pc ?

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  • Can't connect to shared folders anymore?

    - by HuskyHuskie
    My home server is running Windows Server 2008 R2. I've had it running for almost a year now without any issues with shared folders. This past week I had an issue with my modem which required it to be power cycled and with that I power cycled my router. After that I haven't been able to connect to my shared network folders. I have no idea why that would even cause an issue as I've power cycled my networking equipment in the past without issues and none of my settings appear to have been lost. I am mapping these drives on my Windows 7 Ultimate machine using "Map Network Drive", from there I enter \\SERVER\Storage as I'm trying to connect to my shared folder named Storage. I receive the following error every time I try mapping the drive: Windows cannot access \\Server\Storage Check the spelling of the name. Otherwise there might be a problem with your network. To try to identify and resolve network problems, click Diagnose. Details: Error code: 0x80070035 The network path was not found. When I click Diagnose I get the following: Problems found file and print sharing resource (SERVER) is online but isn't responding to connection attempts. The remote computer isn't responding to connection on port 445, possibly due to firewall or security policy settings, or because it might be temporarily unavailable. Windows couldn't find any problems with the firewall on your computer. I've tried this from multiple computers with the same issue too. To resolve the problems so far I've tried: Disabling the firewall on SERVER Reinstalling File Services Modifying NetBT\Parameters registry values Adding a custom inbound rule for port 445 Adding port forwarding on my router for port 445 Recreating the shared folders Checking and rechecking the shared folder permissions. Resetting my user account password on the server used to access the shared folder. I'm pulling my hair out with this problem mainly because it came out of nowhere. It was working fine the night before and the next day it just stopped working. Any ideas of what I could try next are much appreciated. It should also be noted that this server is used as a web server too and that functionality still works correctly.

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  • Windows server 2008R2 routing with single NIC

    - by Fabian
    I'm trying to duplicate a Linux server configuration to a windows server 2008R2 box. Basicaly this linux server acts as a router, but it is doing its job with only 1 interface (1 NIC). Here is the network configuration in place (I cannot change it) : INTERNET <== Router (local ip = 194.168.0.3) <== linux Server (ip : 194.168.0.2). The router is configured with a DMZ to 194.168.0.2, and only allow this IP to connect to internet (Cannot change this router configuration). The linux server is configured with a default gateway to 194.168.0.3, with the option : "Act as router". All other computer on the lan have this configuration (given by DHCP) : IP range : 194.168.0.X MASK : 255.255.255.0 Default gateway : 194.168.0.2 And everything is working perfectly. I'm trying to reproduce this way of routing with only one NIC from a windows server 2008R2, but it seems that you cannnot do it with only one NIC (all exemples I see are refering to 2 NIC with 2 different network). Does someone have an idea how to achieved this in Windows server 2008R2 ? Tx you for your help ! Fabian.

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  • Securing DRAC/ILO

    - by The Diamond Z
    This might be a dumb question but DRAC/ILO both have HTTP server interfaces. If I were trolling IP's port 80 on and I came across such a page I'd know it to be a high value target in the sense that if I can crack it, I can take control of the server to some extent (potentially installing another OS). Other than changing the port, what are the best practices for securing DRAC/ILO on public Internet facing machines?

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  • CentOS Installation on a Cisco MCS 7800

    - by William
    I'm having some problems installing CentOS 5.5 Final (i386) onto my server, a Cisco MCS 7800. The problem comes very early into the installation. When the welcome screen comes up and gives you the option on how to boot into the DVD, I'll press enter to go into the graphical installer. The screen will then have a blinking cursor in the top left of the screen and will never go away (I thought that it just might need time but I let it sit for over 5 hours). I then booted into it again and tried using Linux Text thinking it was a problem with the graphical installer. That didn't work, same problem. Then I tried a DVD of RHEL 5 and got the same problem, both graphical and Linux text. At this point I think it's a hardware problem. The server has 2GB of ECC RAM, 1 Pentium 4 CPU @ 3.06GHZ and 2 WD Hard Drives (80GB) configured for RAID 0. (There is also an option in the BIOS for what OS type and that is set to Linux.) If anyone has any idea what is going on, it would be helpful. Edit Typing "text" doesn't change a thing. Still stuck at the blinking cursor. I looked it up and it's really the same thing as typing "linux text", which as stated in the first part of my question, I've already done.

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  • Can I take my ReadyNAS drive in Raid1 and plug it straight into new different machine?

    - by jacko
    I would assume that I can just take my HDD out of my NAS (in raid1 mirror) and plug it into another enclosure and have it work off the bat but I'd like to make sure... Any ideas? Edit: My current setup is a Netgear ReadyNAS in (hardware) raid1. I'm hoping to replace this with a home theatre type PC (possibly running Ubuntu), and would like to migrate my data without having to do a bulk transfer over my network between the 2 machines. Can anyone confirm the case for the Netgear ReadyNAS? Edit: Ok after further reading it seems that the ReadyNAS Duo formats my drive as ext3 in 16k blocks. There are instructions for mounting a drive into a linux box here: Mounting Sparc-based ReadyNAS Drives in x86-based Linux There is also talk about a linux image here: ReadyNAS Data Recovery - VMware recovery tool I'm not sure whether this means they ReadyNAS actually implements software raid under the hood, or what? So it appears like it IS do-able, but do any of you linux guru's know whether this is viable and whether the fact that they are in raid 1 affect matters?

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  • Hooking up a mac to an HDTV

    - by user4941
    I've got a mac with a firewire port but no HDMI port. I want to connect it to my HDTV. I've done this many times with a PC via HDMI and Svideo, but I'm not sure how to connect my new MacBook Pro to my HDTV. Any ideas?

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  • SSH tuneling and machine selection

    - by Christophe Debove
    With putty on windows I added some tunnel for terminal service through ssh 6664 192.168.20.44:3389 6665 192.168.20.45:3389 6666 192.168.20.46:3389 So when I connect with client to 127.0.0.1:6664 it work... Now I want to use localtest.me to select the machine directly without port number. I want when I type foo.localtest.me in TS client to connect automaticaly on the 127.0.0.1:3389 is it possible or do I need a proxy to translate port regarding domain name.

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  • IIS serving pages extremely slowly

    - by mos
    TL;DR: IIS 7 on WS2008R2 serves pages really slowly; everyone assumes it's because it's IIS and we should have gone with an Apache solution on Linux. I have no idea where to start debugging the problem. I work in a nearly all-MS shop with a bunch of fellow programmers who think Linux is the One True Way. Management recently added a Windows machine with IIS to serve Target Process (third-party agile system), but the site runs extremely slowly. Everyone, to a man, assumes it's because it's on IIS, and if only management would grow a brain and get some Linux servers in here, we could really start cleaning things up! ...Right. Everyone "knows" IIS isn't fit to serve .txt files. ...Well, as the only non-Microsoft hater in the bunch, I am apparently the only one who thinks maybe the Linux guy who hated being told to set up the IIS server may have screwed things up. I'd like to go fix it, but I don't have any clue as to where to start as I am not a sys admin. Help?

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  • Unable to start sql service when TCP/IP is enabled under SSCM - SS Network Configuration

    - by ebel
    I get error 10048. and this in event history: The SQL server service terminated with server-specific error. Only one usage of each socket (protcol/network address/port) is normall permitted. Any idea howto fix this ? Port set is the default 1433... If this is turned off, which is default of course, SQL service starts like a champ. I have done this config many times on other servers with no problem.

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  • What does this TCP Packet mean ?

    - by asksuperuser
    I'm total newbie at tcp/ip and I was experimenting with Wireshark. What this mean: 1824 578.194204 xxx.xxx.xxx.xxx yyy.yyy.yyy.yyy UDP Source port: 17500 Destination port: 17500 In data I can see that my user pc name is sent (happily it's a generic name): does this mean someone is trying to hack my pc ?

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  • Determine the Ports reserved and what service reserved them in Windows XP/2003

    - by bogha
    hi, this question is always rise. How can i know what ports are currently reserved in windows XP/2003 and what service had reserved them. for example when i want to install Apache, default port will be 80, but sometimes the Server will have IIS installed on the same port. so i want to know the way to check the ports and what services had reserved them and also if there is a way to re assign those ports to different services. thank you

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  • Cisco Switching Module and HSRP interface Tracking

    - by Kyle Brandt
    When using 4 port switching module where each port is configured to switchport access vlan ##, for HRSP should I track the vlan interface or the FastEthernet interface? interface FastEthernet0/0/0 switchport access vlan 10 interface Vlan10 ip address 12.12.12.1 255.255.255.0 int FastEthernet0/1 ip address 192.168.1.2 255.255.255.0 standyby ip 192.168.128.1 standby track ?? ! FastEthernet 0/0/0 or Vlan 10?

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  • Determining speed (class) of USB on PC

    - by Thomas Matthews
    Is there a method for determining the speed of a USB port on a Windows XP PC, without using a USB protocol analyzer? I'm looking for something simple, such as looking at the Device Manager. I would like to hook up some USB equipment to a USB 2.0 port, rather than the slower USB 1.0 or 1.1.

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  • Can't telnet localhost smtp

    - by chernevik
    I'm trying to use telnet (debian lenny 5.0.2) to check behavior of a postfix installation, but I can't telnet to smtp. telnet localhost smtp telnet: Unable to connect to remote host: Connection refused telnetting to port 25 doesn't work either. I can telnet to port 110 and pop3. How should I go about debugging this?

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  • Setting up Mail Server (mx.domain.com) using MailEnable in IIS 7.5

    - by Zee Tee
    I have setup MailEnable Standard on my server and have created the PostOffice (domain/mailbox) for the domain which I intend to be using. I have the DNS settings in GoDaddy like this: A (Host) Host: '@' Points To: IP MX Record Priority: 0 Host: 'mx' Points To: @ Is there anything in IIS that needs to be done to make mx.domain.com work as a mail server that can be used in other domain names? Additionally, On the firewall, I have the Outbound port 25 open, not sure, should I be opening port 25 on Inbound as well?

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  • What kind of paralell cable is this?

    - by rodey
    I have an HP LaserJet 4600 and need to order a replacement cable for it. Here is a picture of the port on the printer and the cable is currently in use. I've never seen one of this style before. Can anyone provide the type of port this is or a provide a link to a replacement cable? Thanks!

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  • Virsh: Different XML with edit than dumpxml. Why?

    - by Dave Vogt
    I'm trying to fetch the VNC access data from a virtual machine managed by libVirt. However, when I run virsh dumpxml $machine, the vnc passwd is missing: <graphics type='vnc' port='-1' autoport='yes'/> Checking the same using virsh edit $machine, I see the password is actually there: <graphics type='vnc' port='-1' autoport='yes' passwd='asdf'/> Why is this? Is this intentional (what reason?), or could this be a bug?

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  • why i cannot download jdk from oracle web site directly without AuthParam?

    - by hugemeow
    that is download with the following command, why it fails to download that file? wget http://download.oracle.com/otn-pub/java/jdk/6u35-b10/jdk-6u35-linux-i586.bin the following command works, but that AuthParam may not work after a while, why? wget http://download.oracle.com/otn-pub/java/jdk/6u35-b10/jdk-6u35-linux-i586.bin?AuthParam=1346955572_27e44512fe8ef5cb920c4c329e5f0fd8 how this AuthParam option is implemented? why i cannot download without this parameter? and why i can only get this parameter using explorer? is rewrite used in the oracle server when deal with wget request? why the same command not works after an hour, does the value of AuthParam expired? so how the server check whether the value of AuthParam is expired? wget http://download.oracle.com/otn-pub/java/jdk/6u35-b10/jdk-6u35-linux-i586.bin?AuthParam=1346955572_27e44512fe8ef5cb920c4c329e5f0fd8 --2012-09-07 03:51:01-- http://download.oracle.com/otn-pub/java/jdk/6u35-b10/jdk-6u35-linux-i586.bin?AuthParam=1346955572_27e44512fe8ef5cb920c4c329e5f0fd8 Resolving download.oracle.com... 23.67.251.50, 23.67.251.57 Connecting to download.oracle.com|23.67.251.50|:80... connected. HTTP request sent, awaiting response... 403 Forbidden 2012-09-07 03:51:01 ERROR 403: Forbidden. @KJ-SRS is that kind of CGI program which is used to judge if AuthParam is right? is that possible to download jdk package purely using wget command, and no need to get that AuthParam in explorer

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  • SQL Server: error when connecting

    - by atricapilla
    (migrated from stackoverflow) The application I'm using tries to connect SQL Server named instance running on a dedicated database server. Here's the error I'm getting: The TCP/IP connection to the host <instance_name>, port 1433 has failed. Error: Connection refused: connect. Is the firewall blocking my access or what? Should I dedicate a different port for this application?

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