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• Routing and Remote Access Port Mapping not applied to localhost

  - by Computer Guru

  Hi, I've set up Routing and Remote Access (Windows Server 2003) to forward publicip:80 to a server on the private internal network, and that's working great. Incoming requests from the internet to port 80 are correctly forwarded to our internal web server and everything is fine. However, requests on the server itself are not being forwarded. That is, if I open a console window and type "telnet publicip 80" from the server on publicip, the request is not forwarded to the private server. I understand that in RRAS I've mapped port 80 on the public interface to the private server and that's why it's not working; but I don't know how to configure it so that requests from the local PC are also forwarded to the private server. I'd appreciate any help or feedback on the matter. Thanks!

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• Weird (?) issue with Exchange Forwarding

  - by abszero

  Hello everyone. Here is the long and short of it: the company I work for was purchased by another company who uses Gmail for domains as their email provider. We use an in house Exchange box. No big deal, I dropped into Active Directoy and created several Contact objects that represented our new email addresses at Gmail. I then went through each employees record and have their mail set to forward to this new address and not deliver locally. So I am forwarding email for me@domain1 to me@domain2 and this works great as long as I don't send an email from me@domain2 to me@domain1. If I log into my personal Gmail account and send an email to me@domain1 the email is properly forwarded to me@domain2. The mail coming from me@domain2 to me@domain1 seems to just get lost in the ether. Have I done something wrong or is this a quark with Exchange? Thanks!

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• PHP Mail Relay via Remote smtp Server

  - by Toqeer

  We have a php application running on Linux which sends emails to there users. Currently its setup like php.ini is configured to send via local sendmail server but we have separate mail server for our organization for this domain. I want to send the php application emails via that remote smtp server so these emails can have the correct SPF records and sign via DKIM. But I could not see such option in php.ini to specify the remote host address to forward emails to that, its for windows only. I saw some post which suggest phpMailer but I could not find how to configure that so all our php application could send via our remote SMTP.

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• Why does PsExec hang after successfully running a powershell script?

  - by Matt

  The script is fairly straight forward. Simply tries to start a bunch of windows services. Execution locally works fine when on the target machine. The script is actually executing fine as well when done via PsExec, it just never returns until I hit the "enter" key on my CMD prompt. This is a problem, because this is being called from TeamCity, and it makes the Agent hang waiting for PsExec to return. I've tried the following: Adding an exit and exit 0 at the end of the Powershell script Adding a < NUL to the end of the PsExec call, per the answer in this SF question Adding a > stdout redirect This is how I am actually calling psexec: psexec \\target -u domain\username -p password powershell c:\path\script.ps1 No matter what I do, it hangs until I the locally on the cmd prompt. After I hit enter, I get the message: powershell exited on target with error code 0.

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• Port Forwarding on Actiontec GT704-WG Router Issues

  - by adamweeks

  I am trying to setup a server at customer's location that has the Actiontec GT704-WG DSL router. The port forwarding it not working at all. Here's the details: Server: OpenSuse Linux box with a static IP address of 192.168.1.200 Application running accepting connections on port 8060 Firewall disabled Local connections (within the network) working properly Router: Updated to latest firmware available DHCP range set to 192.168.1.69-192.168.1.199 to not have any conflicts with the server Firewall set to "off" Rule set in the "Applications" setting to forward 8060 TCP and UDP to 192.168.1.200 machine (I've tried using the "TCP,UDP" option as well as both individual options) I've also tried just simply putting the server in the DMZ to see if I could connect to anything, but still nothing. Looking for any clues before I call and waste hours explaining the issue to tech support.

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• send email from linux

  - by mustapha georges

  I built a Linux server (CentOS). I have an application that sends email using the Zemd_Mail class which uses SMTP. The application configuration asks for Host Port Return path (Y/N) but does not provide explanation. What do I need to set this up? Can I use a gmail account to forward the mail? When I try to send mail now, it does not arrive. I get this log in /var/log/maillog Nov 7 21:50:26 localhost sendmail[8328]: qA82oQEP008328: to==?utf-8?B?bWFydGluLmN5dHJ5bmJhdW0=?= <[email protected]>, ctladdr=apache (48/48), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30467, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (qA82oQHr008329 Message accepted for delivery)

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• How can I use an SSH tunnel for all traffic from a single application, without knowing the ports used?

  - by Matthew Read

  I have an application that opens connections on dozens of ports, and doesn't provide documentation about which ports it uses. I could use Wireshark or something to capture the traffic and export the ports from that, but I think it should be simpler than that. (And I'm not sure I would be able to cover all use cases and ensure the app used every single port it can ever use.) So I'm looking for a way to just say "forward all traffic from this application" (bonus points for all traffic from child processes as well) without needing to worry about specific ports. I'm sure there must be a way, but I couldn't hit on the right keywords while searching Google. How can I do this?

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• Port Redirection on Mac OS X Lion

  - by Andreas

  I have tried to solve this issue using pf but with no luck. Basically, I am trying to redirect incoming port 443 traffic to port 22. I have tried to set up a rule in a file and load it in pf but I get syntax error. Can anyone with more experience with pf provide some insight? Here's what I've attempted: pass in on en1 proto tcp from any to any port 443 rdr-to 127.0.0.1 port 22 and pass in quick proto tcp to port 443 rdr-to 127.0.0.1 port 22 I've been able to do this in MacOSX Snow Leopard with ipfw: sudo ipfw add 1443 forward 127.0.0.1,22 ip from any to any 443 in but it doesn't work in Lion (it gives me an Invalid Argument error).

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• Securing a persistent reverse SSH connection for management

  - by bVector

  I am deploying demo Ubuntu 10.04 LTS servers in environments I do not control and would like to have an easy and secure way to administer these machines without having to have the destination firewall forward port 22 for SSH access. I've found a few guides to do this with reverse port (e.g. howtoforge reverse ssh tunneling guide) but I'm concerned with security of the stored ssh credentials required for the tunnel to be opened automatically. If the machine is compromised (primary concern is physical access to the machine is out of my control) how can I stop someone from using the stored credentials to poke around in the reverse ssh tunnel target machine? Is it possible to secure this setup, or would you suggest an alternate method?

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• Airport Express configuration

  - by Christina

  We are trying to set up remote access to a computer that houses a server fro a particular program we are running. The program says we need to configure the office router. In the firewall settings it says to open ports 5345-5351 (TCP only). Port Forwarding: You will also need to forward the same range of ports (5345-5351) to the computer running the Server. This typically requires that the computer running the Server be assigned a static IP on the local network. Having trouble figuring out which IP address we actually need to be using on the client side of this program in order to access the server computer. Can someone walk through this process?? We are working on Mac OSX 10.5. Thank you in advance!

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• I am trying to rewrite a few links with htaccess

  - by Thorpe Obazee

  I have a few URLs and I need them to be rewrite'd to the ones below: http://domain.net/blog/posts http://domain.net/blog/posts/index http://domain.net/blog/posts/view/uri/non-working-holiday http://domain.net/blog/posts/view/uri/we-no-longer-offer http://domain.net/blog/posts/view/uri/festivals http://domain.net/blog/posts/view/uri/christmas-is-just-around-the-corner http://domain.net/posts/ http://domain.net/posts/index http://domain.net/posts/view/uri/non-working-holiday http://domain.net/posts/view/uri/we-no-longer-offer http://domain.net/posts/view/uri/festivals http://domain.net/posts/view/uri/christmas-is-just-around-the-corner I was hoping that my .htaccess will fix this but it doesn't: Options +FollowSymLinks IndexIgnore */* RewriteEngine on RewriteRule ^blog\/(.*)$ posts\/$1 [NC] # if a directory or a file exists, use it directly RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d # otherwise forward it to index.php RewriteRule . index.php

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• HP ML150 G6 upgrading RAM/CPU beyond specs?

  - by Morten Green Hermansen

  I am being told that some limits on some HP servers can be crossed. Do any of you have any experience with that? A ML150/G6 is limited to 48GB RAM but I have been talking to a German company that guaranties me that this server will be able to be upgraded to 384GB RAM (using 32GB memory modules and 2 CPUs) http://www.compuram.de/en/memory,HP+%28-Compaq%29,Server,Proliant,ML150+G6.htm Can this really be true? The server that I have is using E5504 CPUs but will I be able to upgrade to any CPU that is using a LGA1366 socket? All from a low wattage L5640 all the way to the 6 core, high wattage versions like an X5650? (If cooling and power is adequate ofcause). Is there any limitation with powerregulators and chipset (Intel 5500). I am looking forward to any reply. Thanks in advance and best regards, - Morten Green Hermansen, Fanitas

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• Cannot type backquote or backtick in xterm

  - by Cocoro Cara

  Ubuntu 10.10, XTerm(261), Keyboard layout = Canadian Somehow, the backquote (backtick = `) character can't be input does not get entered in XTerm. I type it and nothing happens. The cursor does not move forward. I know it works because I can input it in Terminal (gnome-terminal). The only strange thing is that I have to type the key twice for it to appear. Just to test it, I tried typing it in other applications, and the same thing happens. Have to type it twice in FF, gedit, etc. One more strange thing, I could not input it into this textbox in which I am typing this message. But I can input it in the URL bar, search bar, etc. Someone please help me solve this mystery. I like to use XTerm and I need the backquotes.

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• Use procmail to deliver to stdout and a second server

  - by Halfgaar

  I would like a Postfix server to deliver each message to a certain transport as well as relay to a second server. In master.cf, I have the following transport: zarafa unix - n n - 10 pipe flags= user=vmail argv=/usr/bin/zarafa-dagent ${user} Because I can't get Postfix to deliver to two transports, what I probably need, is a wrapper transport, using procmail maybe, that delivers to zarafa-dagent and relays to a second server (not just forward to an address; relay to a second server). It can also be a script that calls sendmail or whatever, but at the moment, I don't know how to proceed.

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• How to ssh to my dorm computer with shared public IP and no admin rights over the router?

  - by Aamir

  First of all, I am not a Linux or ssh newbie. I have searched for this problem on many forums extensively but nobody seemed to have discussed this. Please help me! I live in a student dorm (off-campus) and all students of the dorm share the same WAN IP (Internet or public IP), which is fortunately static. I am not an admin and have no control over the router that assigns private IP's to all of the students, so I can't really forward port 22 to my computer :( Is it still possible to establish an ssh connection to my dorm computer from a computer on campus?

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• Outlook Anywhere remote https connection issue

  - by holian

  We have SBS 2003, and we use DYNDNS. We forward dyndns address 443 to local server ip 443 port. mycompany.dyndns.org:443 -- server.mycompany.local:443 In android phone i can check my mails with Outlook Active Snyc. From remote machine i can check my mails in owa (https://mycompany.dyndns.org/exchange) But i can't set up outlook 2013 to remote connect. I installed server.mycompany.local to remote machine trusted cert container, but i got error message: "There is a problem with the proxy server's security certificate. The name on the security certificate is invalid or does not match the name of the target site. Outlook is unable to connect to the proxy server. (Error Code 10)" Is it possible to connect exchange, via dnydns? Whats the problem? Thank you

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• Disable mouse hotkeys in Chrome

  - by John Ruiz

  Does anyone know how I can get Chrome to stop using my mouse buttons as hotkeys for a Logitech MX518 gaming mouse? I have the mouse driver and software suite (SetPoint) installed. Unfortunately, SetPoint does not provide per-application settings, so that route is not an option. No matter what I do in SetPoint, Chrome captures my side mouse buttons and uses them as a forward/back hotkey. I want to turn this off because I use those buttons for my push-to-talk in Mumble/Ventrilo. Any idea how I can do this? edit: my set-point does not have a way to create per-application settings.

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• Can't ping IPs for devices not part of Windows Domain

  - by GiddyUpHorsey

  I have a home network with a Trendnet wireless router and a Windows Domain. The DNS server is on a Windows 2000 Server and is configured to forward queries to DNS servers provided by the ISP. The router provides DHCP and is configured with the Windows 2000 Server as the DNS server. When I connect iPhones to the network over WiFi, the router can ping the iPhones through its browser based admin interface, but Windows machines that are part of the Windows Domain cannot. A laptop was connected to the network over WiFi that wasn't joined to the domain and it could see the iPhones. All machines either have a fixed or DHCP allocated IP on the 192.168.0.* subnet. How do I configure the DNS server or the Windows Domain so that Windows machines can see the iPhones?

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• Is it possible to limit output bandwidth between eth0 and lo?

  - by mmcbro

  I'm trying to limit the bandwidth between my eth0 output (nginx proxy) to my loopback inteface (apache) by filtering on destination port. Incoming Packet -> Eth0 -> 0.0.0.0:80 Nginx -> tc qdisc class/iptable mangle 2525port -> 127.0.0.1:2525 Apache I don't know if it's even possible I'm just experimenting. My rules are the followings : tc qdisc add dev eth0 root handle 1:0 htb tc class add dev eth0 parent 1:0 classid 1:10 htb rate 2mbps ceil 2mbps prio 0 tc filter add dev eth0 parent 1:0 prio 0 protocol ip handle 10 fw flowid 1:10 iptables -A OUTPUT -t mangle -p tcp --dport 2525 -j MARK --set-mark 10 I also tried to with FORWARD chain but its still the same.

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• Nginx + PHP-FPM on Centos 6.5 gives me 502 Bad Gateway (fpm error: unable to read what child say: Bad file descriptor)

  - by Latheesan Kanes

  I am setting up a standard LEMP stack. My current setup is giving me the following error: 502 Bad Gateway This is what is currently installed on my server: Here's the configurations I've created/updated so far, can some one take a look at the following and see where the error might be? I've already checked my logs, there's nothing in there (http://i.imgur.com/iRq3ksb.png). And I saw the following in /var/log/php-fpm/error.log file. sidenote: both the nginx and php-fpm has been configured to run under a local account called www-data and the following folders exits on the server nginx.conf global nginx configuration user www-data; worker_processes 6; worker_rlimit_nofile 100000; error_log /var/log/nginx/error.log crit; pid /var/run/nginx.pid; events { worker_connections 2048; use epoll; multi_accept on; } http { include /etc/nginx/mime.types; default_type application/octet-stream; # cache informations about FDs, frequently accessed files can boost performance open_file_cache max=200000 inactive=20s; open_file_cache_valid 30s; open_file_cache_min_uses 2; open_file_cache_errors on; # to boost IO on HDD we can disable access logs access_log off; # copies data between one FD and other from within the kernel # faster then read() + write() sendfile on; # send headers in one peace, its better then sending them one by one tcp_nopush on; # don't buffer data sent, good for small data bursts in real time tcp_nodelay on; # server will close connection after this time keepalive_timeout 60; # number of requests client can make over keep-alive -- for testing keepalive_requests 100000; # allow the server to close connection on non responding client, this will free up memory reset_timedout_connection on; # request timed out -- default 60 client_body_timeout 60; # if client stop responding, free up memory -- default 60 send_timeout 60; # reduce the data that needs to be sent over network gzip on; gzip_min_length 10240; gzip_proxied expired no-cache no-store private auth; gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml; gzip_disable "MSIE [1-6]\."; # Load vHosts include /etc/nginx/conf.d/*.conf; } conf.d/www.domain.com.conf my vhost entry ## Nginx php-fpm Upstream upstream wwwdomaincom { server unix:/var/run/php-fcgi-www-data.sock; } ## Global Config client_max_body_size 10M; server_names_hash_bucket_size 64; ## Web Server Config server { ## Server Info listen 80; server_name domain.com *.domain.com; root /home/www-data/public_html; index index.html index.php; ## Error log error_log /home/www-data/logs/nginx-errors.log; ## DocumentRoot setup location / { try_files $uri $uri/ @handler; expires 30d; } ## These locations would be hidden by .htaccess normally #location /app/ { deny all; } ## Disable .htaccess and other hidden files location /. { return 404; } ## Magento uses a common front handler location @handler { rewrite / /index.php; } ## Forward paths like /js/index.php/x.js to relevant handler location ~ .php/ { rewrite ^(.*.php)/ $1 last; } ## Execute PHP scripts location ~ \.php$ { try_files $uri =404; expires off; fastcgi_read_timeout 900; fastcgi_pass wwwdomaincom; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } ## GZip Compression gzip on; gzip_comp_level 8; gzip_min_length 1000; gzip_proxied any; gzip_types text/plain application/xml text/css text/js application/x-javascript; } /etc/php-fpm.d/www-data.conf my php-fpm pool config ## Nginx php-fpm Upstream upstream wwwdomaincom { server unix:/var/run/php-fcgi-www-data.sock; } ## Global Config client_max_body_size 10M; server_names_hash_bucket_size 64; ## Web Server Config server { ## Server Info listen 80; server_name domain.com *.domain.com; root /home/www-data/public_html; index index.html index.php; ## Error log error_log /home/www-data/logs/nginx-errors.log; ## DocumentRoot setup location / { try_files $uri $uri/ @handler; expires 30d; } ## These locations would be hidden by .htaccess normally #location /app/ { deny all; } ## Disable .htaccess and other hidden files location /. { return 404; } ## Magento uses a common front handler location @handler { rewrite / /index.php; } ## Forward paths like /js/index.php/x.js to relevant handler location ~ .php/ { rewrite ^(.*.php)/ $1 last; } ## Execute PHP scripts location ~ \.php$ { try_files $uri =404; expires off; fastcgi_read_timeout 900; fastcgi_pass wwwdomaincom; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } ## GZip Compression gzip on; gzip_comp_level 8; gzip_min_length 1000; gzip_proxied any; gzip_types text/plain application/xml text/css text/js application/x-javascript; } I've got a file in /home/www-data/public_html/index.php with the code <?php phpinfo(); ?> (file uploaded as user www-data).

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• Amazon EC2 - Unable to connect to MySQL

  - by alexus

  I'm having issue connecting from one VM to another # nmap -p3306 ip-XX-XX-XX-XX.ec2.internal Starting Nmap 6.40 ( http://nmap.org ) at 2014-06-10 17:50 EDT Nmap scan report for ip-XX-XX-XX-XX.ec2.internal (XX.XX.XX.XX) Host is up (0.000033s latency). PORT STATE SERVICE 3306/tcp closed mysql Nmap done: 1 IP address (1 host up) scanned in 1.05 seconds # in my Security Group I allowed Inbound connectivity via port TCP, portrange 3306 and Source 0.0.0.0/0, so theoratically it should work, but in reality it doesn't( I'm running red hat enterprise linux 7 on both VMs. mariadb.service running fine on another VM and I am able to connect to it locally. DB's: # netstat -anp | grep 3306 tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 2324/mysqld # iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination # Any ideas what else I missed?

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• Uninstalled Ubuntu, no GRLDR?

  - by user32965

  So I'm a big fat idiot. I installed Ubuntu 11.04 on my school's laptop, and here's come the time that I have to turn it back in. I wrote GRUB to the Master Boot Record, thinking it wasn't going to be permanent. So, fast forward to yesterday. I decided to hell with this, and popped in my Windows 7 CD, deleted the whole partition, formatted to NTFS, and installed Windows 7 on it. I'm surfing the web and my computer overheats [totally typical] I boot up, and get this: Try (hd0,0): FAT32: No GRLDR Try (hd0,1): invalid or null Try (hd0,2): invalid or null Try (hd0,3): invalid or null Try (hd1,0): NTFS5: No grldr Try (hd1,1): invalid or null Try (hd1,2): invalid or null Try (hd1,3): invalid or null Cannot find GRLDR. Press space bar to hold the screen, any other key to boot previous MBR... Timeout: 5 The timeout part just counts down to 0 from 5. I need to turn in this thing before tomorrow, please please please can someone help me out?

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• sendmail - DSN: Name Server host not found

  - by Daniel Mitchell

  I've recently setup a new backup server and have configured sendmail with a smart_relay_host Except every email from the command line doesn't go anywhere. From mail.log: Oct 3 14:32:52 **back01 sm-mta[16570]: p93DWqtC016568: to=<[email protected], ctladdr= (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=120762, relay=10.2.30.60, dsn=5.1.2, stat=Host unknown (Name server: 10.2.30.60: host not found) Oct 3 14:32:52 ***back01 sm-mta[16570]: p93DWqtC016568: p93DWqtC016570: DSN: Host unknown (Name server: 10.2.30.60: host not found) DNS is working correctly on this box. I can do forward and reverse lookups. I can also telnet to the mail relay and send a message that way. I'm stumped, any suggestions?

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• [iptables] Why do 'iptables -A OUTPUT -j REJECT' at the end of the chain OUTPUT override the previous rules??

  - by Serge

  Those are my IPTABLES rules: iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A OUTPUT -p tcp --dport 22 -j ACCEPT iptables -A OUTPUT -p udp --dport 22 -j ACCEPT iptables -A OUTPUT -p tcp --dport 80 -j ACCEPT iptables -A OUTPUT -p udp --dport 53 -j ACCEPT iptables -A OUTPUT -p tcp --dport 53 -j ACCEPT iptables -A INPUT -p tcp --dport 80 -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m recent --set --name DEFAULT --rsource iptables -A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m recent --update --seconds 180 --hitcount 4 --name DEFAULT --rsource -j DROP iptables -A INPUT -p tcp -m state --state NEW --dport 22 -j ACCEPT iptables -A OUTPUT -j REJECT iptables -A INPUT -j REJECT iptables -A FORWARD -j REJECT Im using a remote ssh conetion to set them up, but after i set: iptables -A OUTPUT -j REJECT My connection get lost. I have read all the documentation for Iptables and i can figure out anything, the global Rejects for INPUT work well because i can access to the web page but i get a timeout for ssh. Any idea? Thanks

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• Switch 302 redirect to 301 with Apache 2 ProxyPass in front of Tomcat 6

  - by Gearóid

  I'm trying to optimise my site for SEO and it seems as though their is a 302 direct in action for the http requests. I'm hosting my app on a Tomcat 6 server which lies behind an Apache 2 server. I use the ProxyPass method (http://tomcat.apache.org/tomcat-6.0-doc/proxy-howto.html) to forward all requests to port 8080 (the port my app is hosted on). I've seen a lot of advice on how to set the redirect type when using the VirtualHost method but none to do with ProxyPass. The app is a Struts app that forwards users on to index.jsp when they hit the base url. Could this also be the issue? I'm grateful for any help on this one! Cheers!

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