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  • Exchange2010 has Private Machine Name and IP in outbound SMTP - How to remove?

    - by John Bergman
    We have a domain (domain.local) that has IP Addresses in the 10.10.10.* range. In the outbound SMTP server traffic, I see the internal machine name (exchange.domain.local), and the internal ip address (10.10.10.55). The question is, how do you remove this header from exchange, or change it to have the external machine name/ip addresses. I am not talking about the HELO / EHLO handshake as part of the protocol. Please help.

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  • Can Haproxy deny a request by IP if its stick-table is full?

    - by bantic
    In my haproxy configs I'm setting a stick-table of size 5 that stores every incoming IP address (for 1 minute), and it is set as nopurge so new entries won't get stored in the table. What I'd like to have happen is that they would get denied, but that isn't happening. The stick-table line is: stick-table type ip size 5 expire 1m nopurge store gpc0 And the whole configs are: global maxconn 30000 ulimit-n 65536 log 127.0.0.1 local0 log 127.0.0.1 local1 debug stats socket /var/run/haproxy.stat mode 600 level operator defaults mode http timeout connect 5000ms timeout client 50000ms timeout server 50000ms backend fragile_backend tcp-request content track-sc2 src stick-table type ip size 5 expire 1m nopurge store gpc0 server fragile_backend1 A.B.C.D:80 frontend http_proxy bind *:80 mode http option forwardfor default_backend fragile_backend I have confirmed (connecting to haproxy's stats using socat readline /var/run/haproxy.stat) that the stick-table fills up with 5 IP addresses, but then every request after that from a new IP just goes straight through -- it isn't added to the stick-table, nothing is removed from the stick-table, and the request is not denied. What I'd like to do is deny the request if the stick-table is full. Is this possible? I'm using haproxy 1.5.

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  • Receive input over TCP/IP and use it to update HTML

    - by mawg
    This has got to be a FAQ, so can someone please just direct me to a "network programming for dummies" URL? The server wants to push information to a client or broadcast to all, when an event happens - as opposed to the clients constantly polling the server "just in case". The client then updates a browser page display. How do I do that? (toldya it was a n00b question) Should I have a thread which receives info on a socket and then writes it to a database which the browser display (PHP) can process with an HTML refresh tag, or what? Sorry to sound so dumb.

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  • what are these weird IP address connections in resource monitor?

    - by bill
    I decided to check out Resource Monitor (on the 'Performance' tab in Task Manager, Windows 7) and I noticed in the "Network" section that the 'System' image name kept making a bunch (~5 at a time) of connections to random IP addresses, it would show anywhere from 1-500 bytes/sec 'sent'. They would stay connected for 1-2 minutes. -All web browsers are closed So, first thing I did was run a trace from network-tools.com on some of these IP addresses. 8/10 were outside of US and did not resolve to any host name. Of the 10 IP addresses I traced, 2 were in US, 4 showed origins in China, and one each to Algeria, Russia, Pakistan, Korea. (!) So, the next thing I did was turn off my wireless card, watch the connections disappear, then turn the card back on, and within 30 seconds more random connections were created by System, with different IP addresses from the first time. The next thing I did was go open Task Manager, Show Processes From All Users, then I killed just about everything that wasn't (what appeared to be) a windows process. Turned on wi-fi, and again within 30 seconds, random IP addresses connect for ~ 1 min at a time, new ones coming and going. I occasionally use bit torrent on this machine, but there was definitely no process that seemed related to bt running after I went through task manager, and bt wasn't open to begin with. So, any ideas on what these connections might be for? I have been using Ad-Aware Free and AVG Free on this computer for a while now, always up to date..

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  • Is possible to arbitrarily register names to the same public IP?

    - by Alex. S.
    I registered a domain, lets say mysite.com (for example), then, results that somebody else has an A record from anotheraddress.com pointing to the same IP address of mine (in a VPS in linode.com) What can I do to avoid this???, I mean, I would prefer reject accesses from anotheraddress.com to my site. I just know only by casualty putting my genuine domain name on this http://www.domaintools.com/reverse-ip/ My DNS server is name.com, and the DNS server pointing to the my public IP is from GoDaddy. Is possible to register arbitrarily names to the same public IP? Can I use my DNS record with mysite.com to point to 209.85.133.147 (google.com), for example?

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  • tcp/ip accept not returning, but client does

    - by paquetp
    server: vxworks 6.3 calls the usual socket, bind, listen, then: for (;;) { client = accept(sfd,NULL,NULL); // pass client to worker thread } client: .NET 2.0 TcpClient constructor to connect to server that takes the string hostname and int port, like: TcpClient client = new TcpClient(server_ip, port); This is working fine when the server is compiled and executed in windows (native c++). intermittently, the constructor to TcpClient will return the instance, without throwing any exception, but the accept call in vxWorks does not return with the client fd. tcpstatShow indicates no accept occurred. What could possibly make the TcpClient constructor (which calls 'Connect') return the instance, while the accept call on the server not return? It seems to be related to what the system is doing in the background - it seems more likely to get this symptom to occur when the server is busy persisting data to flash or an NFS share when the client attempts to connect, but can happen when it isn't also. I've tried adjusting priority of the thread running accept I've looked at the size of the queue in 'listen'. There's enough. The total number of file descriptors available should be enough (haven't validated this yet though, first thing in the morning)

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  • Exchange2010 has Private Machine Name and IP in outbound SMTP - How to remove?

    - by user44755
    We have a domain (domain.local) that has IP Addresses in the 10.10.10.* range. In the outbound SMTP server traffic, I see the internal machine name (exchange.domain.local), and the internal ip address (10.10.10.55). The question is, how do you remove this header from exchange, or change it to have the external machine name/ip addresses. I am not talking about the HELO / EHLO handshake as part of the protocol. Please help.

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  • Am I supposed to assign the broadcast IP somewhere?

    - by pvieira
    This is a very basic question from a newbie point of view. I have a dedicated server at Hetzner running Windows 2008 R2. I bought a subnet of IP addresses to use in this server. They provided me a given range of IPs, incluind one Ip labeled as "Broadcast". I know how to assign those IPs to the NIC, but should I do something with the Broacast IP, like configure it somewhere on Windows? Or can I just ignore it and I'll be fine? This IP range will be used to host SSL sites.

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  • Static IP on Wifi at work and dynamic at home?

    - by Jason Shultz
    I need the laptops at my office to have a static IP for security purposes and identification. However, some employees take their laptops home in the evening. If I have the wifi config set to use a static IP, how can they have a dynamic IP at home? the laptops are using Windows Vista and Windows 7.

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  • Windows 2008 server and Redhat with only 1 ip address, can windows route the traffic?

    - by paulcap1
    I have a two home server VMs set up. Windows 2008 server on port 80 and Centos/Redhat on port 8080. Both have separate godaddy domain name A name records pointing to them. But I cant point both domain to the same IP I only have 1 wan ip address at home. So one of my domain is forward to my IP:8080. My question: Is it possible for my windows server to redirect a certain domain name to my Linux server on port 8080? So i Have mysite1.com going to windows and mysite2.com also going to the windows server but windows would redirect mysite2.com traffic to the linux ip address:8080. I want to access both sites at my work and my work firewall is strict and will not allow domain forwarding from godaddy.

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  • Static IP on Wi-Fi at work and dynamic at home?

    - by Jason Shultz
    I need the laptops at my office to have a static IP for security purposes and identification. However, some employees take their laptops home in the evening. If I have the Wi-Fi configuration set to use a static IP, how can they have a dynamic IP at home? The laptops are using Windows Vista and Windows 7.

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  • Multiple SSL domains on the same IP address and same port?

    - by John
    This is a Canonical Question about Hosting multiple SSL websites on the same IP. I was under the impression that each SSL Certificate required it's own unique IP Address/Port combination. But the answer to a previous question I posted is at odds with this claim. Using information from that Question, I was able to get multiple SSL certificates to work on the same IP address and on port 443. I am very confused as to why this works given the assumption above and reinforced by others that each SSL domain website on the same server requires its own IP/Port. I am suspicious that I did something wrong. Can multiple SSL Certificates be used this way?

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  • Static IP address on Wi-Fi at work and dynamic at home?

    - by Jason Shultz
    I need the laptops at my office to have a static IP address for security purposes and identification. However, some employees take their laptops home in the evening. If I have the Wi-Fi configuration set to use a static IP address, how can they have a dynamic IP address at home? The laptops are using Windows Vista and Windows 7.

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  • Intermittent 403 errors when using allow to limit access to url with both explicit IP and SetEnvIf

    - by rbieber
    We are running Apache 2.2.22 on a Solaris 10 environment. We have a specific URL that we want to limit access to by IP. We recently implemented a CDN and now have the added complexity that the IP's that a request are shown to be coming from are actually the CDN servers and not the ultimate end user. In the case that we need to back the CDN out, we want to handle the case where either the CDN is forwarding the request, or the ultimate client is sending the request directly. The CDN sends the end user IP address in an HTTP header (for this scenario that header is called "User-IP"). Here is the configuration that we have put in place: SetEnvIf User-IP (\d+\.\d+\.\d+\.\d+) REAL_USER_IP=$1 SetEnvIf REAL_USER_IP "(10\.1\.2\.3|192\.168\..+)" access_allowed=1 <Location /uri/> Order deny,allow Allow from 10.1.2.3 192.168. allow from env=access_allowed Deny from all </Location> This seems to work fine for a time, however at some point the web server starts serving 403 errors to the end user - so for some reason it is restricting access. The odd thing is that a bounce of the web server seems to resolve the issue, but only for a time - then the behavior comes back. It might be worthwhile to note as well that this URL is delegated to a JBoss server via mod_jk. The denial of access is, however; confirmed to be at the Apache layer and the issue only seems to happen after the server has been running for some time.

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  • Trace IP Adress in Wordpress

    - by Ajith
    I need to trace the ipadress (where my website access)for optional loading of my theme.Explanation: I want to add a share link to twitter and facebok in my application.i think in some countries like china;twitter blocked.Thats why i need to check from where my site is accessing.otherwise which affecting my site's performance.How can we solve this problem in PHP.If anybody have experience please help me..

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  • How can I block access to public server IP for OpenSSH in Debian?

    - by VanDerSpar
    I got a Debian server with a public and a private IP in a DMZ. I need to be able to connect to it through SSH on our private side, and then block all access to the public address. Both /etc/hosts.deny and sshd_config seems to only let one block incoming IP addresses. What I really want is to disable SSH connections for the public IP. I've been trying iptables, but I haven't had luck with that neither. Any help is appreciated.

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  • How do I set up a virtual network interface with its own IP address?

    - by Stefano Palazzo
    I vaguely remember that it's possible to set up virtual network interfaces with their own IP addresses, using only one physical network connection. I can find a few guides on the internet that recommend setting these up in /etc/network/interfaces, but Ubuntu doesn't use this file. Therefore my question: What's the correct way of setting these up in recent versions of Ubuntu? As this is a laptop, and I need it to connect to all kinds of different networks, I want to keep the network manager and all its configuration. To be more clear: at the end of this, I want to have a new network interface (e.g. "eth42") with its own IP address, but using whatever is connected in network manager to send the actual packets. In NM, it should appear as if I just had a second ethernet adapter installed in my system.

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  • Is there a way to run CUDA applications with the CUDA device being a secondary adapter?

    - by Slartibartfast
    I've been trying to run a CUDA program on a remote computer which has Windows 7 installed. The GPU is GeForce GTX 480. One of the problems I've been facing is that, the computer has two adapters, 1) Standard VGA Adapter 2) NVIDIA GeForce GTX 480 Even though this shows in the device manager. The desktop uses the standard VGA Adapter. I'm assuming this is because the Standard VGA is the primary adapter. Also the device manager shows that the monitor is connected to the standard VGA Adapter. In this scenario if i try to run any CUDA application it fails to recognise a CUDA capable device. Is it necessary for the NVIDIA adapter to be the primary one? Or is there any way to use CUDA when the graphics card is a secondary adapter. I've seen a few posts in the NVIDIA forums on this before, one suggests using another low cost NVIDIA card as the primary adapter, but that is currently not an option. I couldn't find any other solutions. Thanks I tried running the deviceQuery test from the NVIDIA GPU Computing Samples. This was the result i obtained CUDA Device Query (Runtime API) version (CUDART static linking) cudaGetDeviceCount FAILED CUDA Driver and Runtime version may be mismatched FAILED The driver version I'm using is 263.06. The CUDA version is 3.2 I ran the same test on my desktop which also has windows 7 and a GeForce GTX 465. The CUDA toolkit version is 3.2. The driver version was the same and the test passed, although it failed with an older driver.

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  • Bridging 10GbE with 12.04 - bridging works but the bridging computer has no internet access

    - by Donal
    I have been trying to get 12.04 bridging working with two 10GbE cards. I have 2 10GbE cards in a linux box being used only for this bridge, 1 with 2 10GbaseT ports and another with a single CX4 port. I have 2 client computers connected with 10GbaseT cards and the CX4 card connects to a procurve switch. I can get the bridging happening mostly the way that I want, The clients receive dhcp information from the dhcp server (not the bridging machine) and can connect to and properly see the rest of the network. Speeds are ok, not amazing but working on that is another matter. My problem is that the bridging machine has no internet access ... meaning I can't update anything or apt-get anything It can ping all other machines on the local network. I've tried the helpful hints from: https://help.ubuntu.com/community/NetworkConnectionBridge "Enabling Internet Use on the Bridging Computer" and get the following RTNETLINK answers: File exists but dhclient br0 does nothing for me :( I think if it is anything it a multiple route problem as both br0 and eth4 have ipaddresses ... even though I have only set it up so that br0 has one ... Bridge setup details: /etc/network/interface auto br0 iface br0 inet static address 192.168.0.246 netmask 255.255.255.0 gateway 192.168.0.1 broadcast 192.168.0.255 dns-nameservers 192.168.0.1 dns-search example.com dns-domain example.com #(eth2 & eth3 are the 10GbaseT) #(eth4 is the CX4 connection) pre-up ip link set eth2 down pre-up ip link set eth3 down pre-up ip link set eth4 down pre-up brctl addbr br0 pre-up brctl addif br0 eth4 eth3 eth2 pre-up ip addr flush dev eth3 pre-up ip addr flush dev eth2 pre-up ip addr flush dev eth4 post-down ip link set eth4 down post-down ip link set eth2 down post-down ip link set eth3 down post-down ip link set br0 down post-down brctl delif br0 eth2 eth3 eth4 post-down brctl delbr br0 ifconfig -a br0 Link encap:Ethernet HWaddr 00:15:17:22:20:34 inet addr:192.168.0.102 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::215:17ff:fe22:2034/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:4957 errors:0 dropped:0 overruns:0 frame:0 TX packets:1077 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:596320 (596.3 KB) TX bytes:139952 (139.9 KB) eth4 Link encap:Ethernet HWaddr 00:60:dd:47:7c:05 inet addr:192.168.0.57 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::260:ddff:fe47:7c05/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1 RX packets:15391 errors:0 dropped:51 overruns:0 frame:0 TX packets:1207 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:5916769 (5.9 MB) TX bytes:154312 (154.3 KB) Interrupt:70 route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth4 0.0.0.0 192.168.0.1 0.0.0.0 UG 100 0 0 br0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 br0 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 br0 192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth4

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  • SSD as primary or secondary drive on a small Linux server?

    - by Alex Martelli
    I'm pensioning off my 10-years-old home server and replacing it with an Ubuntu 10.04 box. The two storage devices are a Western Digital Caviar Green 2.0TB HD and an Intel X25-M 34nm Gen 2 80GB SATA II 2.5inch SSD (the box has 8GB RAM and an i5 750, if it matters). I don't care much about boot times (since I don't plan to reboot all that often;-); the main frequent, performance-demanding task will be (re)building large open source C or C++ software packages from sources (as an open source contributor, I do that often). So, I thought I'd keep the SSD as the secondary drive and the HD as the primary one, using the SSD mostly for the files that can otherwise demand a lot of seeking (esp. in a parallel make). However, the friendly vendor (perhaps more experienced in Windows systems than in Linux ones) thinks the "normal" way to configure the machine would be with the SSD as the primary drive. I'm pretty rusty on configuring and tuning systems, so, I thought I'd better double check on SuperUser... thanks in advance for advice about this choice!

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