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• What happens when a consumer switch receives a VLAN-tagged Ethernet frame?

  - by netvope

  Suppose you connect a trunk port from a VLAN capable network switch to a (VLAN incapable) consumer-grade network switch via a direct cable. Now the former switch send the later switch a 802.1Q-tagged Ethernet frame. What should the later switch do? Drop the frame? Forward the frame? Undefined behavior? If the behavior is undefined, what is most probable? Edit: Thank you for your answers. To summarize, the behavior of the consumer switch depends on: How it handles frames with 0x8100 in the EtherType field1 How it handles jumbo frames, or frames with payload larger than 1500 bytes Wikipedia has a nice diagram comparing an untagged and a tagged Ethernet frame: There are reports that some consumer-grade switches pass VLAN-tagged frames just fine. 1 or more precisely, where an EtherType field is expected for non-tagged frames

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• PHP+Apache as forward/reverse proxy: ¿how to process client requests and server responses in PHP?

  - by Lightworker

  Hi! I'm having a lot of troubles with the propper configuration of Apache mod_proxy.so to work as desired... The main idea, is to create a proxy on a local machine in a network wich will have the ability to proces a client request (client connected through this Apache prepared proxy) in PHP. And also, it will have the capacity to process the server responses on PHP too. Those are the 2 funcionalities, and they are independent one from each other. Let me present a little schema of what I need to achive: As you can see here, there're 2 ways: blue one and red one. For the blue one, I basically conected a client (Machine B - cell phone) on my local network (home) and configured it to go thorugh a proxy, wich is the Machine A (personal computer) on the exactly same network. So let's say (not DHCP): Machine A: 192.168.1.40 -- Apache is running on this machine, and configured to listen port 80. Machine B (cell phone): 192.168.1.75 -- configured to go throug a proxy, wich is IP 192.168.1.75 and port 80 (basically, Machine A). After configuring Apache properly, wich is basically to remove the "#" from httpd.conf on the lines for the mod_proxy.so (main worker), mod_proxy_connect.so (SSL, allowCONNECT, ...) and mod_proxy_http.so (needed for handle HTTP request/responses) and having in my case, lines like this: # Implements a proxy/gateway for Apache. Include "conf/extra/httpd-proxy.conf" # Various default settings Include "conf/extra/httpd-default.conf" # Secure (SSL/TLS) connections Include "conf/extra/httpd-ssl.conf" wich gives me the ability to configure the file httpd-proxy.conf to prepare the forward proxy or the reverse proxy. So I'm not sure, if what I need it's a forward proxy or a reverse one. For a forward proxy I've done this: <IfModule proxy_module> <IfModule proxy_http_module> # # FORWARD Proxy # #ProxyRequests Off ProxyRequests On ProxyVia On <Proxy *> Order deny,allow # Allow from all Deny from all Allow from 192.168.1 </Proxy> </IfModule> </IfModule> wich basically passes all the packets normally to the server and back to the client. I can trace it perfectly (and testing that works) looking at the "access.log" from Apache. Any request I make with the cell phone, appears then on the Apache log. So it works. But here come the problem: I need to process those client requests. And I need to do it, in PHP. I have read a lot about this. I've read in detail the oficial site from Apache about mod_proxy. And I've searched a lot on forums, but without luck. So I thought about a first aproximation: 1) Forward proxy in Apache, passes all the packets and it's not possible to process them. This seems to be true, so, what about a reverse proxy? So I envisioned something like: ProxyRequests Off <Proxy *> Order deny,allow Allow from all </Proxy> ProxyPass http://www.google.com http://www.yahoo.com ProxyPassReverse http://www.google.com http://www.yahoo.com which is just a test, but this should cause on my cell phone that when trying to navigate to Google, I should be going to Yahoo, isn't it? But not. It doesn't work. So you really see, that ALL the examples on Apache reverse proxy, goes like: ProxyPass /foo http://foo.example.com/bar ProxyPassReverse /foo http://foo.example.com/bar wich means, that any kind of request in a local context, will be solved on a remote location. But what I needed is the inverse! It's that when asking for a remote site on my phone, I solve this request on my local server (the Apache one) to process it with a PHP module. So, if it's a forward proxy, I need to pass through PHP first. If it's a reverse proxy, I need to change the "going" direction to my local server one to process first on PHP. Then comes in mind second option: 2) I've seen something like: <Proxy http://example.com/foo/*> SetOutputFilter INCLUDES </Proxy> And I started to search for SetOutputFilter, SetInputFilter, AddOutputFilter and AddInputFilter. But I don't really know how can I use it. Seems to be good, or a solution to me, cause with somethin' like this, I should can add an Input filter to process on PHP the client requests and send back to the client what I programed/want (not the remote server response) wich is the BLUE path on schema, and I should have the ability to add an Output filter wich seems to give me the ability to process the remote server response befor sending it to the client, wich should be the RED path on the schema. Red path, it's just to read server responses and play with em. But nothing more. The Blue path, it's the important one. Cause I will send to the client whatever I want after procesing the requests. I so sorry for this amazingly big post, but I needed to explain it as well as I can. I hope someone will understand my problem, and will help me to solve it! Lot of thanks in advance!! :)

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• "#< #5.1.3 SMTP; 553 sorry, your domain does not exists.> #SMTP#"

  - by osgx

  Hello I had recieve the error #< #5.1.3 SMTP; 553 sorry, your domain does not exists.> #SMTP# What does this means? It is a message from server with sendmail, send to domain3 (which uses ms exchange). Full error mail from exchange (sorry, not exact message, but translated from ru to en) Diagnostic info for administrators: Forming server: domain1_with_sendmail user@domain3 #< #5.1.3 SMTP; 553 sorry, your domain does not exists.> #SMTP# Does Exchange change text description from remote smtp error? There is "MX" record for domain3 and no "A" records for domain3, only one for "www.domain3" Update" all domains are public and have fully-qualified names, all dns's are accessible." Update2: domain1 has only "A" record, but not the MX one. Can it be a problem?

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• Making Google Talk messages appear on all logged in clients

  - by Ryan Hayes

  We're using Google Talk as our unofficial-official chat client around the office at work. One thing that poses a big problem almost every day is the fact that Google Talk only sends a message to the clients that you last used. Even though you may be logged into GTalk on 3 different machines, if you start talking on one machine, that becomes your "active" machine, and if you go to another machine, you will still only get messages on the last active machine. Is there a way that you can force Google Talk to send messages to ALL logged in clients, regardless of which client you are actively using? That way, you don't miss any messages during the time between when you get up from the active machine and then make the new client "active".

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• SMTP Verb Error on MSExchange Server 2003

  - by Jason Adams

  Hi, Every morning for the last two weeks or more I've had to reboot our Exchange Server and often I have to reboot it again during the day. We use a smarthost for sending our mail out and if I view the queues on Exhange System Manager the Small Business SMTP Connector is in a retry state with "The connection was dropped due to an SMTP protocol event sink". I turned logging up to maximum on ExchangeTransport and the only non-information event in EventViewer is “Message delivery to the host '62.13.128.187' failed while delivering to the remote domain 'mail.authsmtp.com' for the following reason: The connection was dropped due to an SMTP protocol event sink. The SMTP verb which caused the error is 'x-exps'. The response from the remote server is ''.” I stopped using the smarthost during the error condition and all I got was lots of small business connector connections with the same error. I can telnet into mail.authsmtp.com and send a mail during the error state. Any pointers would be gratefully received.

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• how to bypass internal DNS?

  - by fabjoa

  This is about Ubuntu but should be pretty much the same on all Linux flavors. Let's say I add an entry to my /etc/hosts such as 127.0.1.12 facebook.com and an Apache virtual host such as <VirtualHost 127.0.1.12> ServerName facebook.com DocumentRoot /var/www </VirtualHost> when i open my browser and send a GET request to facebook.com, firefox will browse my /var/www folder. Question: How could I fetch (ie, using wget in bash) the real facebook.com domain - without erasing the entry in /etc/hosts nor my Apache VirtualHost -- IOW how could I bypass internal DNS?

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• HAProxy -- pause/queue all traffic without losing requests

  - by Marc

  I basically have the same problem as mentioned in this thread -- I would like to temporarily suspend all requests to all servers of a certain backend, so that I can upgrade the backend and the database it uses. Since this is a live system, I would like to queue up requests, and send them to the backend servers once they've been upgraded. Since I'm doing a database upgrade with the code change, I have to upgrade all backend servers simultaneously, so I can't just bring one down at a time. I tried using the tcp-request options combined with removing the static healthcheck file as mentioned in that thread, but had no luck. Setting the default "maxconn" value to 0 seems to pause and queue connections as desired, but then there seems to be no way to increase the value back to a positive number without restarting HAProxy, which kills all requests that had been queued up until that point. (The "hot-reconfiguration" options using -sf and -st start a new process, which doesn't seem to do what I want). Is what I'm trying to do possible?

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• how to protect telnet access to smtp port 25?

  - by Michael Mao

  Hi all: Please consider the following: 192-168-1-106:~ michael$ telnet <remote_server_ip> 25 Trying <remote_server_ip>... Connected to li*****.linode.com. Escape character is '^]'. 220 mindinscription.net ESMTP Postfix (Ubuntu) quit 221 2.0.0 Bye Connection closed by foreign host. Is this very bad? how to protect port 25 from malicious attackers? I've already set up a firewall, but not very sure what to do in this case. Basically I'd like to use this server to only send emails as alert messages, not receiving any external emails. Many thanks to the help in advance.

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• Exchange not preserving the "To:" field

  - by Matt Simmons

  I've got a hosted exchange solution through Apptix, which isn't the problem, I think, but it may be relevant. I have my main account, [email protected], and to that, I have an alias, [email protected]. Whenever I send an email to [email protected], I examine the headers, and I see the "To:" field being correct, "To: [email protected]". All is well. I recently set up another user, [email protected] to function as a multipurpose mailbox. I aliased "[email protected]" to the services account in the same method that I did "[email protected]", however nothing I have sent to "[email protected]" actually goes TO "[email protected]". All of the headers say "To: [email protected]". This makes it extremely difficult to filter based on headers alone. Does anyone have any feedback on what settings I would need to look at in order to fix that?

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• Sendmail Issue - Local Mail / Inner Domain Mail

  - by ngl5000

  Environments: Ubuntu / Sendmail / Google Apps Emailing: I send and receive all of my emails through google apps besides emails that are sent directly from my website. My Web Domain: example.com (for the purpose of the question only) Problem: When my website sends an email, using sendmail, to any local address ([email protected]) I get an unknown user error. Emails sent to other domains seem to work just fine. Question: I believe this is because I don't have these users defined on my ubuntu server, this is besides the point I need to configure sendmail such that it doesn't pick out local emails sent to ([email protected]) and instead finds their name server which points to google apps and sends it there instead. This is my first try at serverfault, I normally use stackoverflow so let me know if I'm messing up! Thank you!

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• Reverse DNS does not match SMTP Banner

  - by Bastien974

  Hi all, I had this Warning with mxtoolbox. I know that it's not necessarily a big problem, but since we are having lots of issue with email delivery, I want to check everything. I have a Exchange server 07 + Sonicwall. My FQDN is office.mydomain.ca for send/receive connectors. When I try : telnet office.mydomain.ca 25 -- 220 MYSERVER.mydomain.local Microsoft ESMTP MAIL Service ready at Fri, 7 May 2010 10:34:36 -0400 I can change my SMTP Banner in the Sonicwall, but I don't know what to write, if there is a specific syntax or what can be the consequence if it doesn't work. Thanks for your help.

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• Invalidating unused ssh keys

  - by JH

  I am using one ssh account for all my Subversion users. They send me their public keys and I put them in .ssh/authorized_key of the svn account, then they can check out the code from Subversion using ssh tunnel. So far everything works fine. The problem though is that I want to invalidate keys that have not been used for some time (say one month). Does anyone know a way to make sshd log the public key when a user signs in? Thanks.

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• Postfix Not Sending Email to Some Addresses?

  - by Jake

  I'm using Jetpack on Wordpress, and it wasn't working. I was getting the following error: Diagnostic-Code: X-Postfix; unknown user: "jake" --60FD1138CAD.1354039466/example.com Content-Description: Undelivered Message (example.com substituted for our domain) We set up a test mail function, and that wasn't sending either. We changed the email to an outside email and it worked. Any thoughts why it won't send to an email that is at the same domain? Or why it sends to some emails but not others? Upon running postconf -n, I get the following: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no config_directory = /etc/postfix inet_interfaces = all inet_protocols = all mailbox_size_limit = 0 mydestination = example.com, Example, localhost.localdomain, localhost myhostname = example.com mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 myorigin = /etc/mailname readme_directory = no recipient_delimiter = + relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes

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• Nginx with postfix not sending mail - from address appearing wrong

  - by Adripants

  I am using a php form to send email. The script reports success, but the mail never arrives. The tail of the mail log shows: Nov 22 01:24:25 contra postfix/pickup[1195]: 0CC1B119A53: uid=100 from=<nginx> Nov 22 01:24:25 contra postfix/cleanup[1320]: 0CC1B119A53: message-id=<[email protected]> Nov 22 01:24:25 contra postfix/qmgr[1196]: 0CC1B119A53: from=<[email protected]>, size=363, nrcpt=1 (queue active) Just wondering where this from address is coming from and if thats why mails aren't arriving.

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• Unable to SSH into EC2 instance on Fedora 17

  - by abhishek

  I did following steps But I am not able to SSH to it(Same steps work fine on Fedora 14 image). I am getting Permission denied (publickey,gssapi-keyex,gssapi-with-mic) I created new instance using fedora 17 amazon community image(ami-2ea50247). I copied my ssh keys under /home/usertest/.ssh/ after creating a usertest I have SELINUX=disabled here is Debug info: $ ssh -vvv ec2-54-243-101-41.compute-1.amazonaws.com ssh -vvv ec2-54-243-101-41.compute-1.amazonaws.com OpenSSH_5.2p1, OpenSSL 1.0.0b-fips 16 Nov 2010 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to ec2-54-243-101-41.compute-1.amazonaws.com [54.243.101.41] port 22. debug1: Connection established. debug1: identity file /home/usertest/.ssh/identity type -1 debug1: identity file /home/usertest/.ssh/id_rsa type -1 debug3: Not a RSA1 key file /home/usertest/.ssh/id_dsa. debug2: key_type_from_name: unknown key type '-----BEGIN' debug3: key_read: missing keytype debug2: key_type_from_name: unknown key type 'Proc-Type:' debug3: key_read: missing keytype debug2: key_type_from_name: unknown key type 'DEK-Info:' debug3: key_read: missing keytype debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug2: key_type_from_name: unknown key type '-----END' debug3: key_read: missing keytype debug1: identity file /home/usertest/.ssh/id_dsa type 2 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9 debug1: match: OpenSSH_5.9 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.2 debug2: fd 3 setting O_NONBLOCK debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,[email protected],zlib debug2: kex_parse_kexinit: none,[email protected],zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,[email protected] debug2: kex_parse_kexinit: none,[email protected] debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_setup: found hmac-md5 debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: found hmac-md5 debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug2: dh_gen_key: priv key bits set: 131/256 debug2: bits set: 506/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug3: check_host_in_hostfile: filename /home/usertest/.ssh/known_hosts debug3: check_host_in_hostfile: match line 17 debug3: check_host_in_hostfile: filename /home/usertest/.ssh/known_hosts debug3: check_host_in_hostfile: match line 17 debug1: Host 'ec2-54-243-101-41.compute-1.amazonaws.com' is known and matches the RSA host key. debug1: Found key in /home/usertest/.ssh/known_hosts:17 debug2: bits set: 500/1024 debug1: ssh_rsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/usertest/.ssh/identity ((nil)) debug2: key: /home/usertest/.ssh/id_rsa ((nil)) debug2: key: /home/usertest/.ssh/id_dsa (0x7f904b5ae260) debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic debug3: preferred gssapi-with-mic,publickey,keyboard-interactive,password debug3: authmethod_lookup gssapi-with-mic debug3: remaining preferred: publickey,keyboard-interactive,password debug3: authmethod_is_enabled gssapi-with-mic debug1: Next authentication method: gssapi-with-mic debug3: Trying to reverse map address 54.243.101.41. debug1: Unspecified GSS failure. Minor code may provide more information Credentials cache file '/tmp/krb5cc_500' not found debug1: Unspecified GSS failure. Minor code may provide more information Credentials cache file '/tmp/krb5cc_500' not found debug1: Unspecified GSS failure. Minor code may provide more information debug2: we did not send a packet, disable method debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Trying private key: /home/usertest/.ssh/identity debug3: no such identity: /home/usertest/.ssh/identity debug1: Trying private key: /home/usertest/.ssh/id_rsa debug3: no such identity: /home/usertest/.ssh/id_rsa debug1: Offering public key: /home/usertest/.ssh/id_dsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic debug2: we did not send a packet, disable method debug1: No more authentication methods to try. Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

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• Problems with mailenable when sending to yahoo mail

  - by Mee

  I'm testing sending emails from mailenable webmail. I have no problems sending mail to gmail or hotmail, both work fine, but yahoo mail sends my messages to the spam folder and shows the attachment icon for the message even though the message doesn't contain any attachments, it's just plain text. It only includes a reply to a previous message, like this: message text ----- Original Message ----- original message text I copied the message content and sent it from gmail to yahoo and the attachment icon didn't show which makes me believe it's something with mailenable. What could possibly be wrong? Also, is there a white list for yahoo mail that I can join? And also for other popular webmail? I'm going to use this on a production website (site visitors use the contact us form to send messages to the site - the mail enable server running on the same machine as the web server - then I check the messages using the mailenable webmail and reply them). This is really important to me, your help would be really appreciated ...

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• Sharepoint Document Library not receiving emails

  - by ria

  I have created a sharepoint document library which is email enabled. However when i send email to the designated email address from anywhere, i dont receive the email & attachment in the list. I have done some R&D and i hv found that in order to receive email from anywhere i have to expose my DNS of the sharepoint site to the outside world. Now i dont know whether it applies to the email address designated to me in the Active directory profile as well (my company domain email address). How to test that this email reception is working in the document library? I have tried sending an email from the sharepoint site and it works fine so the SMTP settings are correctly done.

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• OpenVPN performance: how many concurrent clients are possible?

  - by Steffen Müller

  I am evaluating a system for a client where many OpenVPN clients connect to a OpenVPN server. "Many" means 50000 - 1000000. Why do I do that? The clients are distributed embedded systems, each sitting behind the system owners dsl router. The server needs to be able to send commands to the clients. My first naive approach is to make the clients connect to the server via an openvpn network. This way, the secure communication tunnel can be used in both directions. This means that all clients are always connected to the server. There are many clients summing up over the years. The question is: does the OpenVPN server explode when reaching a certain number of clients? I am already aware of a maximum TCP connection number limit, therefore (and for other reasons) the VPN would have to use UDP transport. OpenVPN gurus, what is your opinion?

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• Command to execute another command while replaying the command on STDOUT

  - by hakre

  It's not easy to formulate the question properly, maybe it helps when I describe what I'd like to do. I want to execute a command and pipe it's output into a tool called pastebinit which uploads the STDOUT output to pastebin. That works very well, however I would like to send the command itself on top of it but w/o typing it a second time. Is there some command I can launch "my command" with that will Print "my command" on STDOUT Executes "my command" I have the feeling that something like that exists but as hard as it is to formulate such a question properly, I was not able to dig it up with google so far.

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• Are there netcat-like tools for Windows which are not quarantined as malware?

  - by Matthew Murdoch

  I used to use netcat for Windows to help track down network connectivity issues. However these days my anti-virus software (Symantec - but I understand others display similar behaviour) quarantines netcat.exe as malware. Are there any alternative applications which provide at least the following functionality: can connect to an open TCP socket and send data to it which is typed on the console can open and listen on a TCP socket and print received data to the console ? I don't need the 'advanced' features (which are possibly the reason for the quarantining) such as port scanning or remote execution.

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• QoS / PBR Routing Questions

  - by Bernard

  I have a 50Mbs Satellite link and a 10Mbs Microwave link supplying a very remote location. Behind these links, I have a 6,400 seat network - with about 3,000 signed in at any one time. My goal is to send all of the Voip traffic (Google Chat, Magic Jack, Skype, Speakeasy, Vonage, Vonage PC, Yahoo) through the microwave link which has 100ms latency. The rest of the traffic can utilize any remaining bandwidth of the microwave link with excess being diverted to the higher latency (600ms) satellite connection. The problem I've had so far is that most automatic routing configurations weigh the bandwidth heavily for preference - and I'm only wanting latency considered. Additionally, I don't know if this can even be handled with the routing hardware I have at my disposal (Cisco 3640, 3745, & 3845). Any recommendations (or really good starting points) would be greatly appreciated.

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• Making Windows Explorer to Search WebDAV Server using DASL

  - by user124209

  I am trying to setup search in a WebDAV repository in IIS 6 on Windows Server 2003 R2. I successfully configured WebDAV in IIS and enabled my repository indexing as described in Searching WebDAV Directories (IIS 6.0) I have verified that search is now supported by my WebDAV server, in OPTIONS request I can see DASL support: DASL: <DAV:sql> DAV: 1, 2 Public: OPTIONS, TRACE, GET, HEAD, DELETE, PUT, POST, COPY, MOVE, MKCOL, PROPFIND, PROPPATCH, LOCK, UNLOCK, SEARCH Allow: OPTIONS, TRACE, GET, HEAD, DELETE, COPY, MOVE, PROPFIND, PROPPATCH, SEARCH, MKCOL, LOCK, UNLOCK I connected to my WebDAV server from a client computer, which is Windows 8.1 and WebDAV is working well. I mounted a drive and connected using \\server@port\DawWWWRoot as described here. However my client computer, which is Windows 7, does not generate any search request. I have captured requests using Fiddler tool and found that Windows Explorer is not sending any search requests, instead it is sending a PROPFIND and downloading files. How do I make Windows Explorer to send SEARCH request to my WebDAV server?

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• How to read a Text File Hidden Characters?

  - by balexandre

  Hi guys, I've created a text file from an application that I developed. When I send the text file to a SYSTEM Validation, they (3rd Party System) say that the file is invalid and that the file contains 3 characters in the beginning of the file that are not allowed as well special characters are not correct. They also say I need to use either ISO 8859-1 or PC850 Well, I'm using NotePad++ and I can't see that at all! What is the best text file reader for this kinda problems? EDITED I also have a MAC and just a thought I remembered opening in TextMate ... WOW! Now I know what they are talking about! How can I have the same in Windows?

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• Will using Apache's ProxyPass directive on persistent Ajax connections alleviate the connection limit error?

  - by naurus

  I've got some javascript that keeps a persistent Ajax connection open for each client, and I know that this can cause some serious issues for apache, but not for lighttpd. One thing I learned from researching how to get around this was how to use the ProxyPass directive to send all requests for a certain directory to another address:port combination (without letting the user know). What I want to know is, if I put my PHP in a proxy'd (to lighttpd) directory and call that with javascript, will this still count against my apache connection limit? The reason I wonder is that apache is still serving the content, just not processing it. Seems to me that this would be a connection. Thanks

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• Sending files with iChat doesnt work in Snow Leopard

  - by Nippysaurus

  My girlfriend and I often sit in the lounge looking at stuff online and sending it to each other to look at. So sometimes we drag images into an iChat and it will appear in the other persons iChat window. The ability to do this seems to have broken with the upgrade to 10.6, and the issue persists over both of our laptops and my iMac. The following is a scheenshot of what happens. The image that appears in my window is from me dragging it in there, but the other person cannot see it, and the next bubble is the other person attempting to send me an image, but I only ever see that little white circle for a while then it dissapears. Is this broken for everyone?

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