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• Advanced call forwarding in Skype

  - by Ivan

  Hi all, I'd like to forward calls from a Skype account to another Skype account (both online), but so that it calls and then enters a number. E.g., I have two accounts: acc1 and acc2. I want all calls from acc1 to be forwarded to acc2, and when the call is established to enter "#123". Is that possible? Thanks. EDIT: The question is basically how to call a user and add the extension directly, before the call has been established (e.g., to call directly acc2:#123).

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• How to open port 25 on the server

  - by liuxingruo

  I'm using centOS. I want to implement a smtp mail server, and I have installed postfix and dovecot(both have been set correctly). I tried to telnet the 25 port, but it returns Unable to connect to remote host: Connection refused So, How can I open the 25 port? Thanks!

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• Apache forwarding to tomcat shows a blank page

  - by MNS

  I have an application running on tomcat at http ://www.example.com:9090/mycontext. The host name in server.xml points to www .example.com. I do not have localhost anymore. I am using apache to forward requests to tomcat using mod_proxy. Things work fine as long as the ProxyPath is /mycontext. The server name setup in virtual host is www .abc.com and http ://www.abc.com/mycontext works fine. However I would like to ignore the context path and simply use http://www.abc.com/ to forward requests to http://www.example.com:9090/mycontext. When I do this, apache shows me a blank page. What am I missing here? I have not changed anything in server.xml except the default host to www .example.com. <VirtualHost *:80> ServerName www.abc.com ProxyRequests Off ProxyPreserveHost On <Proxy *> Order deny,allow Allow from all </Proxy> ProxyPass / http://www.example.com:9090/mycontext ProxyPassReverse / http://www.example.com:9090/mycontext </VirtualHost> Thanks

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• VNC connection through machine with only SSH port open

  - by pufferfish

  I would like to make a VNC connection from home to a Windows machine at work. The Windows machine is not accessible from the outside, but there is a Linux box that does have port 22 open, so it would seem that this can be done. I suspect it's just a command that "forwards" connections to port 22 on the Linux machine to the Windows machine? Just can't find an example that does exactly this though Thanks in advance!

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• Why does no small Rj45 port exist?

  - by Christian Sauer

  While I bought my last Tablet I noticed that no Tablet (and most smaller notebooks /convertibles) has a Rj45 port. Which I finde quite dissatisfying since I like to use RJ45 in numerous places. I think a reason could be that Rj45 is simply too big for a Tablet - it is downright massive compared to micro USB /HDMI etc. But that leads me to my question: Why is there no attempt to build a smaller micro-Rj45 port which could be used in constrained spaces?

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• iptables rule for forwarding outbound traffic

  - by Claudiu

  I am trying to forward the outbound traffic to another server. Current rule is: /sbin/iptables -A OUTPUT -p tcp -s localhost -o 91.xxx.xxx.xxx --dport 65000:65010 -j ACCEPT but when I do a iptables -L, the rule its showed like this: ACCEPT tcp -- localhost.localdomain anywhere tcp dpts:65000:65010 So I guess my rule is bad written since the "destination" column shows "anywhere" Can you help me with this?

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• port 80 was blocked

  - by Kombuwa

  hi, in my home computer incoming port 80 was blocked. i gess it was done by some vires. did any body know how to open the closed port in xp. or any tool to open colosed ports.

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• Setting up a subdomain SSL with custom port

  - by Webnet

  I'm setting up a subdomain on a dedicated server that I'm going to use for SVN services. The SVN server is up and running I just need to setup the subdomain. The https has been switched to a custom port because there's a confliction with a port forward pointing to another server. Should I do this through GoDaddy or Apache?

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• What's the extra FTP port here?

  - by warl0ck

  While downloading a tar ball from gnu's FTP server, I found that other than standard 21 TCP port connection, I also seeing an extra connection: tcp 0 0 192.168.1.109:45056 208.118.235.20:21 ESTABLISHED 10956/wget tcp 0 0 192.168.1.109:56724 208.118.235.20:22259 ESTABLISHED 10956/wget What that port is used for? I checked /etc/services, only 20 and 21 should be in use, am I wrong? The command in use was wget 'ftp://ftp.gnu.org/gnu/tar/tar-1.26.tar.xz'

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• Remove a port from a VLAN (HP ProCurve)

  - by sixnumber

  I'm not too familiar with switches but I want to remove port 6 from the following 'VLAN 12' I've tried searching for an easy explanation to no avail - How do I do this please? Port Information Mode Unknown VLAN Status ---------------- -------- ------------ ---------- 5 Untagged Learn Up 6 Tagged Learn Up 8 Untagged Learn Up 18 Untagged Learn Down 22 Untagged Learn Up 26 Tagged Learn Up

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• Sharing a serial port between two processes

  - by peterrus

  As it is not possible to directly share a serial port between two processes using Linux, I am looking for another way to achieve this, I have heard about socat but could not find a concrete example of how to realize the following: Split one physical serial port (/dev/ttyUSB0) into two virtual ports, one for reading and one for writing, as one process only needs to send data, and one only needs to receive data. I can no modify the sending application unfortunately.

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• X11 forwarding from one server to other

  - by n3oblit7

  I have a setup where I need to forward X11 from my local machine (laptop) to a Virtual machine. The server hosting this VM cannot be reached directly from my laptop. I need to first login to a gateway and from this gateway, I can access the VM. How can I forward X11 from my laptop to this VM? I have tried following but these do not work: [laptop # ] ssh -X [gateway] [gateway # ] ssh -X [VM] [laptop # ] ssh -tX [gateway] ssh -X [VM] I could forward X11 only till the gateway. (DISPLAY variable gets set on gateway)

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• BIND9 Forwarding by view

  - by Triztian

  Hi I think this is a simple issue, I'd like to forward only to certain IPs in the LAN network, for example I have 2 acl lists: acl "office1" { 192.168.1.15; // With internet access }; acl "production" { 192.168.1.101; // No internet access }; I know that there probably should be more efficient ways to restrict internet access, but at the moment this is what I'd like to try.Here's what I've tried in named.conf.local // Inlcude my acl definitions include "/etc/bind/acls.conf"; view "no-internet" { match-clients { production; }; include "/etc/bind/named.conf.default-zones"; zone "localdomain.com" { type master; file "/etc/bind/db.localdomain.com"; }; zone "1.168.192.in-addr.arpa" { type master; file "/etc/bind/db.192.168.1"; }; } view "internet" { match-clients { office1; }; include "/etc/bind/named.conf.default-zones"; forwarders { 201.56.59.14; // Made Up 201.56.59.15; // Made Up }; zone "localdomain.com" { type master; file "/etc/bind/db.localdomain.com"; }; zone "1.168.192.in-addr.arpa" { type master; file "/etc/bind/db.192.168.1"; }; }; As you can see I want a localdomain.com defined for every computer in my network and forward internet access to the computers in the office but not to the ones on the production floor. I've modified my conf file, however the IP in the "no-internet" acl is able to resolve the domains, even though I've rebooted the computer, flushed the DNS using ipconfig /flushdns and set my DNS Server as the only one, why is this still happening? Thanks in advance.

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• nginx root directory not forwarding correctly

  - by user66700

  The server files are store in /var/www/ Everything was working perfectly, then I've been getting the following errors 2011/01/28 17:20:05 [error] 15415#0: *1117703 "/var/www/https:/secure.domain.com/index.html" is not found (2: No such file or directory), client: 119.110.28.211, server: secure.domain.com, request: "HEAD /https://secure.domain.com/ HTTP/1.1", host: "secure.domain.com" Heres my config: server { server_name secure.domain.com; listen 443; listen [::]:443 default ipv6only=on; gzip on; gzip_comp_level 1; gzip_types text/plain text/html text/css application/x-javascript text/xml text/javascript; error_log logs/ssl.error.log; gzip_static on; gzip_http_version 1.1; gzip_proxied any; gzip_disable "msie6"; gzip_vary on; ssl on; ssl_ciphers RC4:ALL:-LOW:-EXPORT:!ADH:!MD5; keepalive_timeout 0; ssl_certificate /root/server.pem; ssl_certificate_key /root/ssl.key; location / { root /var/www; index index.html index.htm index.php; } }

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• Fedora 17 transparent Ethernet Bridge not forwarding IP traffic

  - by mcdoomington

  I am running on Fedora 17 with the latest ebtables and have been trying to setup a transparent bridge - using the following script, I send a ping through the bridged host and only see the requests on the bridge (among other traffic from eth0), BUT, arps and arp replies are making it through. My host is setup - Client 192.168.1.10 <-- eth0 -- eth2 192.168.1.20 Ethernet script: #!/bin/sh brctl addbr br0; brctl stp br0 on; brctl addif br0 eth0; brctl addif br0 eth2; (ifdown eth0 1>/dev/null 2>&1;); (ifdown eth2 1>/dev/null 2>&1;); ifconfig eth0 0.0.0.0 up; ifconfig eth2 0.0.0.0 up; echo "1" > /proc/sys/net/ipv4/ip_forward; ebtables -P INPUT DROP ebtables -P FORWARD DROP ebtables -P OUTPUT DROP ebtables -A FORWARD -p ipv4 -j ACCEPT ebtables -A FORWARD -p arp -j ACCEPT Any assistance would be great!

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• Global Email Forwarding with EXIM?

  - by Dexirian

  Been trying to find a solution to this for a while without success so here i go : I was given the task to build a High-Availability Load-Balanced Network Cluster for our 2 linux servers. I did some workaround and managed to get a DNS + SQL + Web Folders + Mails synchronisation going between both. Now i would like my server 2 to only do mailing and server 1 to only do web hosting. I transfered all the accounts for 1 to 2 using the WHM built-in account transfert feature. I created 2 different rsync jobs that sync, update, and delete the files for mail and websites. Now i was able to successfully transfer 1 mail accounts from 1 to 2, and the server 2 works flawlessly. All i had to do was change the MX entries to point to the new server and bingo. Now my problem is, some clients have their mail softwares configured so that they point to oldserver.domain.com. I cant make the (A) entry of oldserver.domain.com point to the new server for obvious reasons. I thought of using .foward files and add them to the home directories of the concerned users but that would be very difficult. So my question is : Is there a way to configure exim so that it will only foward mails to the new server? I need to change all the users so they use their mail on server 2 without them doing anything. Thanks! EDIT : TO CLARIFY MY PROBLEM Some clients have their mail point to oldserver.xyz instead of mail.olderserver.xyz I want to know if i can do something to prevent modifying the clients configuration I would also like to know is there is a way to find out what clients aren't properly configured

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• Forward differing hostnames to different internal IPs through NAT router

  - by abrereton

  Hi, I have one public IP address, one router and multiple servers behind the router. I would like to forward differing domains (All using HTTP) through the router to different servers. For example: example1.com => 192.168.0.110 example2.com => 192.168.0.120 foo.example2.com => 192.168.0.130 bar.example2.com => 192.168.0.140 I understand that this could be accomplished using Port Forwarding, but I need all hosts running on port 80. I found some information about IP Masquerading, but I found this difficult to understand, and I am not sure if it is what I am after. Another solution I have found is to direct all traffic to Reverse Proxy server, which forwards the requests onto the appropriate server. What about iptables? I am using a Billion 7404 VNPX router. Is there a feature that this router has that can accomplish this? Are these my only options? Have I missed something completely? Is one recommended over the others? I have searched around but I don't think I am hitting the correct keywords. Thanks in advance.

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• How to do UDP without port forwarding

  - by igor

  Hi all, I am creating an application in C#, It should send data with UDP. Everything works fine until, I try to communicate with a PC that is on the internet behind a router. How do I fix this so that I can use UDP without port forwarding?

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• Forward mDns from one subnet to another?

  - by user37278

  Is there an ipfw rule that can easily forward mDns packets from one subnet to another? I have a Snow Leopard Server machine serving as the gateway between the two subnets and would like for machines in each subnet to see the services available in the other subnet. The gateway machine is already confirmed as configured correctly such that packets route correctly between the two subnets (ping works, traceroute shows the subnet hop, etc). My problem in designing a ipfw rule is that I don't know how to instruct that I would like multicast packets addressed to 224.0.0.251:5353 on en0 to be addressed to the same ip/port but on fw0 (the other interface). I attempted a rule such as fwd 192.168.10.1 log udp from 192.168.1.0/24 to 224.0.0.251 recv en1 to force the packet to hop over to the other interface (from en1 to fw0), but no dice. The ipfw log shows that the rule is being triggered by packets, but tcpdump isn't showing any packets on the other interface. Also, the only other firewall rules in place are the divert port 8668 and rule #65535 "allow any to any". Any suggestions? Thanks.

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• IPtables: DNAT not working

  - by GetFree

  In a CentOS server I have, I want to forward port 8080 to a third-party webserver. So I added this rule: iptables -t nat -A PREROUTING -p tcp --dport 8080 -j DNAT --to-destination thirdparty_server_ip:80 But it doesn't seem to work. In an effort to debug the process, I added these two LOG rules: iptables -t mangle -A PREROUTING -p tcp --src my_laptop_ip --dport ! 22 -j LOG --log-level warning --log-prefix "[_REQUEST_COMING_FROM_CLIENT_] " iptables -t nat -A POSTROUTING -p tcp --dst thirdparty_server_ip -j LOG --log-level warning --log-prefix "[_REQUEST_BEING_FORWARDED_] " (the --dport ! 22 part is there just to filter out the SSH traffic so that my log file doesn't get flooded) According to this page the mangle/PREROUTING chain is the first one to process incomming packets and the nat/POSTROUTING chain is the last one to process outgoing packets. And since the nat/PREROUTING chain comes in the middle of the other two, the three rules should do this: the rule in mangle/PREROUTING logs the incomming packets the rule in nat/PREROUTING modifies the packets (it changes the dest IP and port) the rule in nat/POSTROUTING logs the modified packets about to be forwarded Although the first rule does log incomming packets comming from my laptop, the third rule doesn't log the packets which are supposed to be modified by the second rule. It does log, however, packets that are produced in the server, hence I know the two LOG rules are working properly. Why are the packets not being forwarded, or at least why are they not being logged by the third rule? PS: there are no more rules than those three. All other chains in all tables are empty and with policy ACCEPT.

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• SSH tunneling with Synology

  - by dvkch

  I try to tunnel SMB and AFP services through SSH to acces my NAS shares on my machine. I already do it successfully with my ReadyNAS using the following command line (ran as my user on my mac) : ssh -Nf -p 22 -c 3des-cbc USER@SERVER -L 8888/127.0.0.1/548 -L 9999/127.0.0.1/139 but I cannot reproduce the same with the Synology NAS. Connecting using this command gives me the following error : channel 4: open failed: administratively prohibited: open failed I also tried with a windows client (used bitvise tunneler): it works with the ReadyNAS but not the Synology and get the following error msg : server denied request for client-side server-2-client forwarding on 127.0.0.1:139 I modified /etc/ssh/sshd_config : MaxSessions 10 PasswordAuthentication yes PermitEmptyPasswords no AllowTcpForwarding yes GatewayPorts yes PermitTunnel yes Is there any way to make it work ? I must add that I can successfully connect via SSH to the NAS so I donnot think this is a firewall issue between the Synology and my computer. Thanks for you answers

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• Tunneling a TCP/IP Connection through Remote Desktop Connection

  - by Kristopher Johnson

  There is a remote Windows server on a private network which I can connect to via Remote Desktop Connection. I would like to be able to make TCP/IP connections from my computer to other computers on that server's network. Remote Desktop Connection makes it possible to share printers, drives, and other local resources through the connection. Is there any way to "tunnel" a TCP/IP connection via RDC? I'd like something similar to the port-forwarding provided by SSH. I don't see any way to do this via RDC, but I'm hoping the capability is there and I just don't know about it.

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• Postfix - How to alias some [email protected] to another user, but only for certain values of "host.com"

  - by Rory McCann

  I have a Postfix email setup. It's handle a few domains (i.e. I have them in my mynetworks in my main.cf). I have a normal unix account and use that to log in, and get my mail. My personal email account is of the form [email protected]. I have a new domain new.com, and I want to forward [email protected] to [email protected], however I don't want to forward [email protected]. Someone has suggested just forwarding all 'info' to 'user', and then using procmail on my user@ account to remove the [email protected] The server is Ubuntu.

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• Problems accessing FileZilla FTP Server from static IP

  - by Kurru

  I'm trying to connect to my FTP server from my external IP address on Comcast Business. On the gateway I've set up port-forwarding on ports 20-21 to my server. Additionally I've forwarded ports 7000-8000 to my server for use in passive mode. In my FileZilla Server application I've set up passive mode to use my static IP and to use the subset of ports listed above. Unfortunately, it doesn't work through the external static IP for some reason, but I can internally. When I try to connect through static IP, the FileZila monitor says Connected, sending welcome message.... 220 FileZillaServer version 0.9.37 beta could not send reply, disconnected My firewall doesn't register any block events and windows firewall is disabled. What am I doing wrong or missing?

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• Spoofing domains - using one domain to look at another without frame redirect

  - by hfidgen

  Hiya, In Plesk 9.2.2 does anyone know how the following can be achieved? I've got domain1.co.uk registered in plesk, but the domain has not been set up with any nameservers or A records, so it is unreachable from the web. However, I need to test it while we get the domain1.co.uk nameservers etc sorted over the next week or so. SO, i've got sparedomain.co.uk registered, with the nameservers and A records pointing to the server, and sure enough it displays the default plesk "theres no website here yet page" . bingo. Now, how can I set up sparedomain.co.uk on my plesk server, so it displays all the data held on the plesk account for domain1.co.uk? Frame forwarding doesnt work - because you get errors saying "domain1.co.uk cannot be found" in your browser - i need a server solution to spoof it all. Anyone got any ideas? Thanks!

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