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  • Setting up a vpn and IIS IP address restrictions

    - by carpat
    I'm trying to get a VPN set up with internal access only sites. I have set up a VPN on a windows server (single VPS server), and I can connect from a remote computer and I get an IP assigned correctly (from 192.168.1.1 - 255) Next I configured IIS (running on the same machine) IP Address and Domain Restrictions to only allow only IP address range 192.168.1.0 with subnet mask 255.255.255.0 When I connect to the VPN with "Use Default Gateway on Remote Network" (so that requests must go through the vpn), I get a 403 from the internal sites. What did I miss?

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  • BGP Multihomed/Multi-location best practice

    - by Tom O'Connor
    We're in the process of designing a new iteration of our network where we improve resilliency by adding a second datacentre. We'll be adding a second datacentre, with an identical configuration of servers as our primary location. To achieve network connectivity, we're looking into a couple of possible methods. See earlier questions http://serverfault.com/questions/86736/best-way-to-improve-resilience and http://serverfault.com/questions/101582/dns-round-robin-failover-and-load-balancing I'm pretty convinced that BGP is the right way to go about this, and this question is not about RRDNS. 1) If we have 2 locations, do we announce the same IP address block from both locations? 2) If we did this, but had a management ssh interface on x.x.x.50 from datacentre A, but it was on x.x.x.150 in datacentre B. What is the best practice mechanism for achieving this? Because if I were nearest to A, then all my traffic would go to x.50, but if i attempted to connect to x.150, I'd not be able to connect, because this address wouldn't be valid at A, but only at B. Is the best solution to announce 2 different netblocks, one at each location, facilitating the need for RRDNS, or to announce a single block, and run some form of VPN between the two sites for managment traffic?

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  • Forward the Wan IP to another Wan IP without change the Source address

    - by user195410
    I have tried this case by using the NAT function in iptables but fail example. PC A IP is 1.1.1.1 (Win7) My Server IP is 2.2.2.2 (CentOS 6.2) target Server B is 3.3.3.3 (Windows server 2003) Flow: PC A WanIP -- My Server A -- Server B (WanIP) ----My iptables rules--------- iptables -t nat -A PREROUTING -d 2.2.2.2 -p tcp --dport 80 -j DNAT --to-destination 3.3.3.3:80 iptables -t nat -A POSTROUTING -d 2.2.2.2 -j MASQUERADE finally, i can access server B website by enter 2.2.2.2:80 but when i checked the access log at Server B i found it's source address had been changed to src:2.2.2.2 dst:3.3.3.3 please help me to do how to get the real address is src:1.1.1.1 dst:3.3.3.3

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  • Is it possible to detect nearby Wi-Fi enabled devices, not necessarily on the same network? [closed]

    - by Sky
    first question on StackExchange ever. I hope I got the right board. I'm trying to create a device (either from a standard AP or some other unconventional means) that will be able to detect nearby Wi-Fi enabled devices. For example, if a cellular phone (iPhone for instance) would be carried into the secured area, its MAC address will be logged. A cellular phone is a good example because it's the most common threat that should be detected. Some important points: The detection can be either active or passive, doesn't matter. The detected device might be connected to a different network, or might not be connected to anything at all. I assume most cellular phones are actively probing when not connected, but I'm not sure. It is important to not only identify the breach, but also to identify the device (MAC address). Conventional hardware is only optional. Distance of detection is at least 6 meters (20 feet). Handling one device at a time is good. Speed of detection is important, under 5 seconds is ideal. So my question is, is this even possible? If so, what can I use in order to make this a reality? Thank you for reading!

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  • Why is my router assigning the wrong address via DHCP

    - by Barry
    I have a WRT54G router that is set up to serve out addresses via DHCP. It correctly serves up addresses to every other machine on the network, including another PC, my macbook when connected via wireless, my wife's notebook, and our printer. However, whenever I attach my macbook to the router via an ethernet cable, the address it is given via DHCP is wrong. My local network is set up as 192.168.1.*. However, when my macbook connects with an ethernet cable, it is given the IP 192.168.29.*. Currently, I have the macbook set up with a manual IP address, and all seems to be working fine. Any ideas on what could be causing this?

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  • DNS PTR record when domain on shared IP address

    - by Marco Demaio
    Hello, I own a typical shared IP hosting plan and domain. I can modify the DNS of the domain from the control panel. The mailserver shares the same IP address, so my typical DNS config is: www.mydomain.com A -> IP mydomain.com A -> IP ftp.mydomain.com A -> IP mail.mydomain.com A -> IP mydomain.com MX(10) -> IP I read some Q&A on this site where they suggest to add PTR record mainly for mailserver. I would like to add PTR record to my domain, I have got two questions: 1) can PTR record be added even if the hosting/mailserver are on a shared IP address? Or do I need a dedicated IP. 2) How do I setup PTR record, I mean does it look like A record: mydomain.com (PTR) -> myip

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  • Forward the Wan IP to another Wan IP without changing the source address

    - by user195410
    I have tried this case by using the NAT function in iptables but fail example. PC A IP is 1.1.1.1 (Win7) My Server IP is 2.2.2.2 (CentOS 6.2) target Server B is 3.3.3.3 (Windows server 2003) Flow: PC A WanIP -- My Server A -- Server B (WanIP) My iptables rules: 1. iptables -t nat -A PREROUTING -d 2.2.2.2 -p tcp --dport 80 -j DNAT --to-destination 3.3.3.3:80 2. iptables -t nat -A POSTROUTING -d 2.2.2.2 -j MASQUERADE finally, i can access server B website by enter 2.2.2.2:80 but when i checked the access log at Server B i found it's source address had been changed to src:2.2.2.2 dst:3.3.3.3 please help me to do how to get the real address is src:1.1.1.1 dst:3.3.3.3

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  • DHCPD Offering ip address on wrong subnet

    - by Logan
    I just recently added a new subnet for our wireless network to our DHCP configuration for the 192.168.254.0 subnet. Most of the time when wireless clients connect it works just fine. However, sometimes on seemingly random occasions the DHCP server will send out a DHCPOFFER with an IP address on the wrong subnet. Example: dhcpd: DHCPDISCOVER from MACADDRESS (ThinkBook2) via 192.168.254.1 dhcpd: DHCPOFFER on 192.168.22.236 to MACADDRESS (ThinkBook2) via 192.168.254.1 Here is the subnet configuration in dhcpd.conf: subnet 192.168.254.0 netmask 255.255.255.0 { option routers 192.168.254.1; range 192.168.254.34 192.168.254.254; default-lease-time 14400; authoritative; } How can I make sure the server always sends out an IP address on the right subnet?

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  • VPN Error 868 when connecting even if using IP address

    - by Fr33dan
    I am trying to connect to a public VPN from VPNGate. However when I attempt to connect to a VPN from the list using MS-SSTP protocol I get the following error: Error 868: The remote connection was not made because the name of the remote access server did not resolve. If I open a command prompt and ping the address in question it resolves to the IP shown on the listing. If I configure the VPN using that IP address directly I still receive the error even though the name no longer needs to resolve. This was working yesterday but it seems the VPN I was using has been removed from the list. What is happening and how can I fix it?

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  • LinkSys router suddenly cannot get an IP address

    - by user43208
    I have a linksys router WRT54G2 connected to a cable broadband. Just last week, everything was working perfectly - I would be able to connect my laptop to the internet using WiFi. However, starting last week, I suddenly lost my internet connection. At first I thought something was wrong with my ISP. However, when I tried connecting the cable directly to my laptop, I found out that there was no problem with the internet connection after all. It appears that it is only my router that cannot get IP address. I have already tried cloning my MAC address and reconfiguring my router using the setup CD, but nothing worked. What could be the problem here? Thank you. Regards, Erwin

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  • router cannot get ip address

    - by user43208
    Hi guys, I have a linksys router WRT54G2 connected to a cable broadband. Just last week, everything was working perfectly - I would be able to connect my laptop to the internet using WiFi. However, starting last week, I suddenly lost my internet connection. At first I thought something was wrong with my ISP. However, when I tried connecting the cable directly to my laptop, I found out that there was no problem with the internet connection after all. It appears that it is only my router that cannot get IP address. I have already tried cloning my MAC address and reconfiguring my router using the setup CD, but nothing worked. What could be the problem here? Thank you. Regards, Erwin

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  • I disconnected my cellphone while transferring files to its Mini SD card. Now the files aren't there

    - by Martín Fixman
    I use Ubuntu 9.10, and the MiniSD card shows as having the space used as if there were files. Baobab (the disk usage analyzer) shows that the card only has 118 MB used (of the 401 Ubuntu claims there are). Of course, I already tried the obvious (rebooting the phone, adding and removing files, etc.), but I don't want to format my card, because I still have some files on it, the transfer to my computer is slow, and because I use an old wire it fails often.

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  • MAC address stealing?

    - by Arnis L.
    Recently my i-connection started to get laggy. Sometimes it disappears completely. ISP told me that someone steals my internet. Someone has managed to sniff my MAC address, kick me out and surf web in my place. So... I'm curious - how it's possible to steal MAC address and what makes that mystical thief to be more privileged that when he uses i-net I lose mine? Or my ISP just lies to me? P.s. It's not wifi.

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  • change email address format with minimal disruption

    - by femi
    Hello, all the email addresses in my organization are in the format [email protected]. this was started when we were a small organization. Now we have grown and need to use something a bit more professional like [email protected] how can this change be implemented with minimal disruption? We currently only use smarteremail. Could recieving ONLY with the old and replying with the new be a solution..till we wean our recipients off the old email address? Any suggestions are welcome. How will moving to exchange help in this instance? Can it be configured to automatically send out using a different address? Thanks

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  • udhcpc doesn't assign ip address

    - by Diab
    i have a board running linux 2.6.28 and i have one Ethernet interface (eth0) i want dhcp to assign dynamic ip to this interface. i have busybox with udhcpc in the file system and the kernel has the "Pack Socket" enabled so i copied the scripts from "busybox-1.14.1/examples/udhcp" to my board on "/etc/udhcpc/" (i created this directory) and when i run : ifconfig eth0 up the interface is up but without ip address, then running udhcpc -i eth0 -s /etc/udhcpc/sample.script i get the following: note : sample.script contains : "exec /etc/udhcpc/sample.$1" # udhcpc -i eth0 -s /etc/udhcpc/sample.script udhcpc (v1.14.1) started Sending discover... Sending select for 192.168.10.198... Lease of 192.168.10.198 obtained, lease time 691200 but when i check with ifconfig i can see that it didn't assign the ip address to eth0. anyone have an idea why udhcpc didn't assign the ip ? Thanx

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  • apache sendmail: trying to change user "from" address from apache to domain account

    - by Wes
    I apologize if I am asking a question already answered, but my problem isn't really that I haven't found an answer. I have, in fact, found a half-dozen different "solutions" to my problem, tried them all, in various combinations, and have been consistently unsuccessful. The goal All I want to do is change the envelope "from" address for all email sent from [email protected] to [email protected], always. What I've already done I am running Apache, PHP, and sendmail on CentOS 5.5, [email protected]. We have an SMTP server at 192.168.0.4. The domain's email accounts are all at @domain.org. I have successfully set up "smart host" using this line in the sendmail.mc file: define(`SMART_HOST', `192.168.0.4')dnl Then I set up masquerading, and was hopeful this would solve it. I have this in the .mc file: FEATURE(`masquerade_entire_domain')dnl FEATURE(`masquerade_envelope')dnl FEATURE(`allmasquerade')dnl MASQUERADE_AS(`domain.org')dnl MASQUERADE_DOMAIN(`domain.org.')dnl MASQUERADE_DOMAIN(`localhost.localdomain.')dnl This rewrites "to" addresses, but not "from" addresses. Testing from the command line: sendmail -v [email protected] Always is shown from the local user (in this case root, or my local user account). I had read that "sendmail" command sometimes bypasses masquerading. Nevertheless, using the "mail" command has the same result. After that, I have explored several "solutions", including: mailertable virtusertable FEATURE(`accept_unresolvable_domains')dnl LOCAL_DOMAIN(`localhost.localdomain')dnl FEATURE(`genericstable')dnl /etc/mail/access file /etc/mail/local-host-names file /etc/mail/trusted-users file All to no affect. The last thing I've tried So, I decided to go in a different direction, and try to set the envelope "from" address via PHP, using either the configuration in /etc/php.ini, or adding the -f parameter to the mail() function or to sendmail command. If I run this command: sendmail -v -f [email protected] [email protected] I get this error in /var/log/maillog: Mar 30 08:56:16 localhost sendmail[24022]: p2UCuE8w024022: [email protected], size=5, class=0, nrcpts=1, msgid=<[email protected]>, relay=user@localhost Mar 30 08:56:19 localhost sendmail[24022]: p2UCuE8w024022: [email protected], [email protected] (500/502), delay=00:00:05, xdelay=00:00:03, mailer=relay, pri=30005, relay=[192.168.0.4] [192.168.0.4], dsn=5.1.1, stat=User unknown Mar 30 08:56:19 localhost sendmail[24022]: p2UCuE8w024022: p2UCuE8x024022: DSN: User unknown Mar 30 08:56:23 localhost sendmail[24022]: p2UCuE8x024022: [email protected], delay=00:00:04, xdelay=00:00:04, mailer=relay, pri=31029, relay=[192.168.0.4] [192.168.0.4], dsn=2.0.0, stat=Sent (Ok: queued as B5E2E40E0A2) Which is basically a "User unknown" 550 error. Help Please help. What do I need to change? Should I just start over in the sendmail.mc file? It has a ton of config options stuffed in it, over days of trying things. Why is changing the envelope "from" address via the command line generating a "User unknown" error?

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  • Disable IPv6 on Loopback address (Localhost, Computer name, ...)

    - by Greg Bray
    We tried installing a 3rd party software product on a new Windows 2008 R2 server and found that everything works except for accessing local services through loopback addresses such as localhost or the computer name (ex: VPS-Web which resolves to localhost). We are not using IPv6 and would like to disable it until the software is compatible. I tried using these instructions for disabling IPv6 on Windows 2008 R2 but it did not disable the protocol for localhost. Pinging localhost or VPS-Web will still return ::1: instead of 127.0.0.1. I can use ping localhost -4 to get the correct address, but IPv6 takes precedent over IPv4 so the 3rd party software only gets the IPv6 address.

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  • Win7 OpenSSH config: no address associated with name

    - by Jonah
    I am using OpenSSH on win7. My home dir is C:\Users\JG, and inside that dir I have the file C:\Users\JG\.ssh\config, with these contents: Host <redacted server ip here> HostName digitalocean_git User git IdentityFile ~/.ssh/digitalocean_moocho/id_rsa The id file pointed to by the "IdentityFile" entry works, as I use it just fine via putty, but for this problem I am trying to get command line OpenSSH working. The crux of the problem is explained by this output: >ssh -v digitalocean_git OpenSSH_4.6p1, OpenSSL 0.9.8e 23 Feb 2007 debug1: Reading configuration data /c/Users/JG/.ssh/config ssh: digitalocean_git: no address associated with name Why is no address associated with the name? How can I make this work?

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  • Trouble Connecting to Virtual Machine after IP address Change

    - by David
    I have a VMware image running a copy of Fedora 11 which is hosted on a remote server. The remote server recently had its IP address change. I'm now unable to connect to my virtual machine. The server admin assures me that my virtual machine is running and assigned the new IP address. I have checked the firewalls and had the remote admin restart the VM instance. Neither of these fixed the problem. How do I troubleshoot a remote server which I am unable to SSH to? I'm actually even unable to ping the remote IP (connection timed out).

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  • Firefox completes the address bar with content absent from my history

    - by Antoine
    I have set Firefox to complete the address bar with elements from the history only ( other options are: nothing, bookmarks, and a history+bookmarks). However, Firefox still continues to complete the address bar with elements that are no longer in my history. A search in the history returns 0 result for the incriminated string. How can I solve this without loosing my entire history? I have already tried shift+delete on the elements I would like to delete, without success. How can I find the source of a certain completion ? (like an SQL request in the sqlite3 files used to store history) I'm using Firefox 16.0.2 on OS X 10.8.2.

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  • Forcing the from address when postfix relays over smtp

    - by John Whitlock
    I'm trying to get email reports from our AWS EC2 instances. We're using Exchange Online (part of Microsoft Online Services). I've setup a user account specifically for SMTP relaying, and I've setup Postfix to meet all the requirements to relay messages through this server. However, Exchange Online's SMTP server will reject messages unless the From address exactly matches the authentication address (the error message is 550 5.7.1 Client does not have permissions to send as this sender). With careful configuration, I can setup my services to send as this user. But I'm not a huge fan of being careful - I'd rather have postfix force the issue. Is there a way to do this?

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  • Trouble Connecting to Virtual Machine after IP address Change

    - by David
    I have a VMware image running a copy of Fedora 11 which is hosted on a remote server. The remote server recently had its IP address change. I'm now unable to connect to my virtual machine. The server admin assures me that my virtual machine is running and assigned the new IP address. I have checked the firewalls and had the remote admin restart the VM instance. Neither of these fixed the problem. How do I troubleshoot a remote server which I am unable to SSH to? I'm actually even unable to ping the remote IP (connection timed out).

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  • Sending Email via Outlook with address containing 2 apostrophes

    - by Luke Duddridge
    Hello All, I am struggling to find anything on the interweb, We have a client and the email address we have been given for one of their employees contains 2 apostrophes. One of our team is struggling to send an email to said employee. The client says the email is valid, but the postmaster reply tells me otherwise. could not be delivered. The problem appears to be : -- Recipient email address is possibly incorrect Additional information follows : -- 550 5.1.1 <xx.xx'xxx'[email protected]>... User Unknown Could anyone shed any light; is this a problem with the user being unknown or is the 2 apostrophes causing an issue. EDIT: Is there any way to encode an apostrophe? Cheers

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  • Address rewriting postfix

    - by ACHAL
    I am using CentOs5 and postfix as an MTA for my server. My situation is as follows:- I have a mail server through which Php applications connect and send mails to the destination addresses. The problem is that the the application servers do not have spf/dkim record set up and my server which actually relays the mails to the network has spf/dkim records. So i want the mail sent by an application having a return address:[email protected] to change to [email protected]. r09.4reseller.org is hostname of my mail server. This i have done by generic mapping in postfix: smtp_generic_maps = hash:/etc/postfix/generic In /etc/postfix/generic: [email protected] [email protected] This is working as return address is changed to [email protected] when mail is sent. But when i try to sent mail on [email protected] I don't get mail on [email protected]. I have tried virtual mapping in postfix i.e by the file /etc/postfix/virtual but its not helping.

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