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• How can I debug Cisco Firewall ASA "Dispatch Unit" very high CPU utilisation from ASDM?

  - by Andy

  I have recently had my first firewall installed so I am very new to this whole situation. I am finding that Dispatch unit is becoming overloaded and it would appear to be the reason I get serious bouts of lag on my server. The firewall has had little configuration apart from me blocking all the ports in "Access Rules" and allowing only the ones the server needs and from where it needs them. I guess what I am after is assistance with locating the issues causing "Dispatch Unit" to take up all the CPU Regards --Edit-- With ASDM statistics I found that packets inbound (peak of 70-100k/sec from <1k/sec normal), traffic inbound (peak of 40-50kbits/sec from <1kbits/sec normal) and CPU all peak at the same time so I am pretty sure it is an attack of some sort but as a beginner with ASA I am not sure how to resolve

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• Set up a root server using Ubuntu and Virtualization

  - by Daniel Völkerts

  Hello, I'd like to setup a fresh root server and install a linux based virtualization on it. My thoughts are on: Intel VTs Hardware Ubuntu 9.10 KVM based virt. The access to the root server will only be SSH for Administration. Has anybody done this before, what was your glues discovered in the daily use? My requirements are: very secure, so the root server only has ssh to the dom-0 and minimalistic ports for the guest (e.g. http/s). good monitoring of host/guest (my idea is to using zabbix for it) easy and fast administration (how are the command line tools working for you? cryptiv? high learning curve?) I'm pleased to learn from your suggestions. Regards, Daniel Völkerts

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• if there are multiple kernel module can drive the same device, what is the rule to choose from them?

  - by Dyno Fu

  both pcnet32 and vmxnet can drive the device. $ lspci -k ... 02:01.0 Ethernet controller: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] (rev 10) Subsystem: Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE] Flags: bus master, medium devsel, latency 64, IRQ 19 I/O ports at 2000 [size=128] [virtual] Expansion ROM at dc400000 [disabled] [size=64K] Kernel driver in use: vmxnet Kernel modules: vmxnet, pcnet32 both kernel modules are loaded, $ lsmod | grep net pcnet32 32644 0 vmxnet 17696 0 mii 5212 1 pcnet32 as you see, kernel driver in use is vmxnet. is there any policy/algorithm in kernel how to choose from the candidates?

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• Looking for a router-like web interface for my Debian gateway.

  - by marcusw

  Hey, I need a web interface program for my debian gateway which has the features of a router's one. Specifically, I must be able to easily Forward ports to various clients on the LAN or the router itself (it's also a server) Manage a DHCP server preferably including DHCP reservation for certain MACs Give me a list of the connected DHCP clients (optionally) Show which clients are the most active as far as bandwidth (something like iftop) Alternatively, it could be a graphical app which I could tunnel over ssh. No command line programs please...I'm used to doing this stuff with a point-and-click interface. Not adverse to command-line setup; just need to be able to reconfigure things graphically. Have a working LAMP setup. I've tried webmin, but it didn't satisfy the "easy" part...too many clicks and too many meny options.

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• Connecting to local Sql server 2005 through Internet

  - by Manish

  Hello My Sql server is on Local Machine, I want to access it through Internet. I Configure Surace manager and Configuration manager of sqlserver 2005 for remote access. My sqlserver is running on port:1433 I am using port forwarding , I can access service of other ports, My Connetion String Is: Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword; But it gives following error when i am trying to connect sql server through internet: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)

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• FTP error when doing file transfer

  - by Ernie

  I'm running vsftpd version 3.0.2 over FTPeS, and I'm having a bit of trouble with file transfers. It seems to work fine when I'm on the LAN, but not from an external IP address. I have the control port and data ports open on my server's software firewall and my router's firewall. When I'm using the service from an external IP address, it seems like sometimes a file transfer will complete, but it times out and I always get the client error: "426 Failure writing network stream". I've tried several clients. I'm thinking there is some sort of data sabotage either at the router or some server policy; maybe because I'm using passive ftp? Suggestions?

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• Debian pure-ftpd, Restrict access

  - by durduvakis

  I am running Debian Wheezy, with ISPConfig 3, plus ModSecurity and I would like to restrict access to ftp to specific IP(s) globally (not to specific ftp users only), that can be either 127.0.0.1 or one I would manually add later. I would also like to completely disable ftp access from the web, but allow only from ftp-client software (if that is possible). The idea of closing firewall ports is not what I want. I know I can do this setting some firewall rule though, but that is not what I currently need. I have managed to do this for example on phpmyadmin inside it's .conf file, but unfortunately I cannot find any configuration to alter for pure-ftpd in my system. Restricting web-ftp access maybe possible by adding some rule in apache2 conf, but I am not sure how to write such a rule. Thanks to everyone that can help cheers

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• Exchange Server 2010 does not include WebDAV

  - by CNLSH

  This is the 1st time I'm dealing with server. May I know what does it mean by "Exchange Server 2010 does not include WebDAV"? Does this mean that EWS does not use HTTPWebRequest and HTTPWebResponse anymore or does not communicates by using the same ports that HTTP and HTTPS? Is it some setting done at the server side that disable the use of WebDav? When it said does not include WebDAV, what does it actually mean? If i really want to use WebDav in Exchange Server 2010, is it possible? Yes, EWS is way better compared to WebDav but what if I wish to use WebDav.

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• AXFR problem using gradwell secondary DNS

  - by Roaders

  Hi All I use Gradwell.com to provide secondary DNS but I keep getting e-mails along the lines of the following saying that it's not working: You have asked us to provide a secondary DNS service for the following domain(s) Unfortunately, the primary DNS server(s) you specified are not permitting the necessary zone transfers from our servers, or they are not answering "SOA" queries for your domain correctly. I have gone through the support procedure and they weren't that helpful. They have suggested the following: Our secondline team have suggested setting the AXFR to use anouther machine. This will ensure that the transfer is not locked down to one machine and should allow any machine to make the request I don't really know what AFXR is and I only have 1 production machine so I can't set the AFXR to use another one! In previous support correspondence we confirmed that I am allowing transfers to the correct IP and that I have the correct ports open on the firewall. I am running Windows Server 2003. What can I do to try and get these zone transfers working? Thanks

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• FCoE, on any Ethernet switch?

  - by javano

  I understand the concept of FCoE. I have looked at the Wikipedia page and looking at the layer 2 frame diagram, it looks like FCoE really should "just work" on any Ethernet switch, but is this really the case? If so, what do switches like Cisco's Nexus 5k or 6120P offer that normal switches don't (in specific relation to FCoE)? I am just using those two switches as examples. On the Nexus 5548UP page for example it says the following; Unified ports that support traditional Ethernet, Fibre Channel (FC),and Fibre Channel over Ethernet (FCoE) Well if FCoE runnins over regular Ethernet, that why does it support "Ethernet and Fibire Channel over Ethernet"? This is why I am curious as to weather FCoE will run on any Ethernet switch and these switches just support "bonus" features, or if you do indeed require a specialist switch. Thank you.

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• Rename Devices in Device Manager

  - by Luke

  This is mostly just for the USB ports, as I recognize everything else in computers.... Anyways, is there a way to rename, or otherwise, identify which USB port (or other hardware for that matter) is which device in Device Manager? I know I can plug in a flash drive, then see what port it is connected with, and find out that way. What I would like though, is to find out that a certain plug is always a certain device in Device Manager. If I can then have a system in mind that always has the same order, I can look and see if a USB port is not being detected or not working properly, and as I uninstall/reinstall USB devices, I know I won't lose my keyboard or mouse, for example. The OS in question currently is Windows 7, but I would accept a solution for ANY version of Windows USB Devices | +--+USB Root Hub Port A | | | ---Keyboard | +--+USB Root Hub Port B | | | ---Mouse | +--+USB Root Hub Port C | ---Empty

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• What is the maximum number of TCP connections I can have in Windows Server 2008?

  - by evilfred

  I would like to have as many connections (single connections from many different clients) as humanly possible in a server running on Windows Server 2008, in order to support a Comet-style application. The application is written in C#. The connections will not be chatty, they just need to be open (and stay open). Buying boatloads of memory and fast CPUs are not a problem. As far as I can tell, I will be limited to 65k simultaneous open connections per NIC - the maximum number of ports. Is this accurate? Or can I go beyond 65k connections / NIC somehow? It seems like there are server products for Linux at least that support hundreds of thousands of connections. How do they do this?

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• Virtual Hosting in RHEL5

  - by Kumar P

  We having RHEL5 linux server with few windows xp clients. We providing web development in php. Now my developers as for common local php server for keep their projects in same place. Currently proxy server and samba sharing are running in RHEL5 server. I installed httpd,php,MySQL in server. And i would like to configure virtual hosting too for LAN. What i want do for it ? In server we have 2 Ethernet ports, 1 for local connection and another one for Internet. Internet provided by ADSL provider. (192.168.0.0 series for ADSL modem connection and 10.1.1.0 for LAN connection. If i want to use virtual hosting , am i want to setup local DNS server ? My requirements are, setup php with mySQL server for Local clients with multiple hosting , without disturbing proxy and samba. Help me to solve it.

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• logitech unifying receiver

  - by Plastkort

  hi! I am having multiple logitech devices, and each and one of them seem to have theire own receiver, occupying USB ports.. I read upon Logitech unifying receiver, and it seem to connect multiple wireless devices from logitech, however I wonder if I just buy this one receiver, will I be able to connect my existing wireless devices, or will I be forced to buy new keyboard and mouse in order to use the unifying receiver? hope anyone here have the answer so I dont need to spend money on something I cannot use.. :) I got PC 1 Logitech Dinovo Edge keyboard Logitech MX Air mouse PC 2 Logitech Dinovo Keyboard Logitech VX mouse

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• Cannot start Xampp on server with IIS

  - by Vafello

  I am running a Windows Server 2003 with IIS and I am trying to install XAMPP in order to be able to run php and mysql based pages. I tried to install php on IIS, but it is too complicated and time consuming for me. I am able to run asp on localhost/ and I would like to run php websites on different port, say localhost:81/. After installing xampp and changing the port in httpd.conf file to 81 I try to turn on apache, but it turns off after about 5 seconds. Mysql works fine. It seems that there is a port clash, but I do not know how to change the ports and turn the apache permanently. Any advice appreciated. (I know it is more a server fault question, however I posted it there as well and did not get any reply, so I decided to try here)

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• Trouble opening my router to my web server

  - by Justin Heather Barrios

  Here's the story. I have a webs server created and connected to my router. The website works great when I'm connected to the router, but when I'm off the network I can't access the website. I got the IP for my router by googling "what is my ip." I have opened ports 80 to 10080 to link to the server in the router. One odd thing that I don't understand. When I am in network if I access XXX.XXX.XX.XX:80 I can access the web page no problem. If I access XXX.XXX.XX.XX:81 (or any other port) I get the error "Cannot access server." Any idea what the problem could be? Could it be my ISP?

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• Using a second wifi router as a wireless bridge

  - by Greg-J

  I purchased a D-Link DGL-4500 to replace my aging WRT54G around a year ago, only to find it nowhere near as reliable. It's been collecting dust since. I'm wondering if there is a way to use it as a wireless bridge so I can connect it to my home network and then use it's ethernet ports to provide network access to several devices. Is this something that can be done? If not, are there devices meant for this? Any help would be appreciated.

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• After enabling raid0, blue screen of death

  - by thegreyspot

  Hi! Im trying to get a raid0 setup going. I have a 750 gb hdd with the OS on it and two 80gb HDD. For right now, I just want to raid0 on the two 80Gb hdd. When I enable raid in my Bios, Win7 has a BSOD during boot. As far as I understand I need to install raid drivers. However how can I do this? The win7 DVD doesnt seem to have a driver install option. Any suggestions? Thanks EDIT: I saw that there was as seperate setting for the 4th and 5th sata ports. So I pluged in my OS drive into there and left it on IDE. Still didnt work though, am I miss understanding that idealogy?

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• USB port not recognising mouse on first bootup

  - by Pacifika

  On a computer here when first powered on the USB wired mouse is not recognised. The light under the mouse is not lit up. Other usb hub's and keyboards work fine. Disconnecting it and reconnecting it fixes the issue, even after a restart - after the pc is switched off for a length of time (for example overnight) the problem reappears. I swapped the mouse, updated the bios and installed updated intellimouse drivers, turned of power saving on the usb ports. Any ideas?

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• Bridging two sockets

  - by Itehnological

  I wondered if it is possible to bridge two incoming tcp sockets. For example: Client A -----> Server <----- Client B The the server sends it's magic to both clients and then they connect to each other bypassing the server Server Client A ----------><---------- Client B UPDATE: The idea is when those clients can't bind to ports to listen to still be able to create connection between each other with the help of the server. For example Client A and Client B have tcp sockets with the server. User A decides to chat with User B and creates a new tcp connection with the server with the request to bridge it with User B. The server sends that request to Client B and it also opens up a new tcp connection with the server for that chat line. Now when the server has both chat connections from A and B it bridges them and they can work without the server, and as a result the server won't have to process all the messages and files the two users share. That's the idea/

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• Hp Procurve Switch : port filtered

  - by user117140

  My HP Procurve switch is blocking port 22 and I dont know how to unblock it.Please let me know From the server, see port 22 is blocked [root@server ~]#nmap -p22,80,443 10.247.172.70 Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2012-04-16 14:12 IST mass_dns: warning: Unable to determine any DNS servers. Reverse DNS is disabled. Try using --system-dns or specify valid servers with --dns_servers Interesting ports on 10.247.172.70: PORT STATE SERVICE 22/tcp filtered ssh ------------------> see 80/tcp filtered http 443/tcp filtered https This is blocked on cisco switch but I dont have any clue how this is done. I know that vlan is configured on switch. vlan 54 ip ospf 10.247.172.65 area 0.0.0.10 vrrp vrid 54 owner virtual-ip-address 10.247.172.65 255.255.255.192 priority 255 enable exit exit Please let me know how to unblock ssh port 22 access on this switch?

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• Colocation and HSRP setup

  - by WinkyWolly

  My colocation provider has setup HSRP for us and has provided us 2 drops (plugged into 1/1/1 and 1/1/2) from their routers as well as a /29 with 2 HSRP IP's and the rest of the /29 usable for the switch. I know that HSRP should be pretty much plug and play as long as the ports are in the same VLAN. However I'm confused as to how to the IP setup should work. Currently I've assigned port 1/1/1 the full /29 however I think this is incorrect because if I were to unplug it port 1/1/2 wouldn't work as it has no IP assignment. What's the proper way to do this?

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• Remote Software Solution that Acts as a Client

  - by Richard

  I am looking for something that I am not sure exists. I have a remote computer that will not allow incoming traffic due to ISP blocking of ports(basically double NAT situation that I am unable to get around). I am wondering if I have a computer acting as a client, is there any solution out there that will allow remote access to the computer. I do have other servers on the net that have static IP's that the computer could initiate a connection with. I am thinking of using Debian Linux, However computer is not built yet so OS is not overly important at this point.

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• Prevalence of WMI enabled in real Windows Server networks

  - by TripleAntigen

  Hi I would like to get opinions from systems administrators, on how common it is that WMI functionality is actually enabled in corporate networks. I am writing an enterprise network application that could benefit from the features of WMI, but I noted after creating a virtual network based on Server 2008 R2, that WMI seems to be disabled by default. Do systems admins in practical corporate networks enable WMI? Or is it usually disabled for security purposes? What is it used for if it is enabled? Thanks for any advice! MORE INFO: I should have said, I really need to be able to query the workstations but I understand that by default the WMI ports on Win7 and XP firewalls (at least) are disallowed, so do you use some sort of group policy or other method to leave a hole open for WMI on the workstations? Or is just the servers that are of interest? Thanks for the responses!!

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• Unable to open up port 80 on EC2 using elasticfox

  - by uswaretech

  I have launched an instance of EC2. Initially the security group I created did not have the port 80 open. I sshed and installed Apache etc, and now want to open port 80. I am using elasticfox. So I go to Security Group - [My Group name] - Grant new permission Open up the port 80(Http with TCP) for network range 0.0.0.0/0 Now my assumption is that these ports should be opened up on the instance, but the instance is not responding on the allocated IPs, public DNS entry. What should I do next?

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