Forwarding traffic from TUN device (C++ backend) to the default gatewayview story

http://serverfault.com – The following problem is just a piece of the bigger solution I have a problem with. All other elements seem working so far, so I'll try to describe very small piece which I have problem with. I've got a linux machine, with tun0 (tunneling interface) and eth0 (witch is my default gateway to the internet). (HowTos)

iptables redirect range and excludeview story

http://serverfault.com – i have this iptables and working. iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 0:20 -j REDIRECT --to-port 8080 #bypass SSH iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 23:442 -j REDIRECT --to-port 8080 #bypass SSL iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 444:2082 -j REDIRECT --to-port 8080 #Cpanel SSL iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 2084:2086 -j RE (HowTos)

[ubuntu] Host-only network with multiple VMsview story

http://ubuntuforums.org – So... I'm having some bizarre issues trying to set up a host-only network with multiple VMs accessible from the host. Just for reference... if I set up say 5 VMs running various 'appliances' and/or distros on the internal network 'intnet', configuring one of them as a gateway/firewall server (providing DHCP), and one of them as a desktop OS with web browser, etc. I get *almost* what I want. (Hardware)

Mail server will send out going mail but will not reciveview story

http://serverfault.com – I've just set up my first mail server with Postfix and Dovecot . I can send out going mail (via squirrel mail) fine but cannot recive them . Pingability tells me that "ConnectException: Connection refused" but my firewall is not blocking port 25 . (HowTos)

VPS security best practiceview story

http://serverfault.com – I've just signed up for a linux VPS to host a website I've been creating and I need some advice on the best approach to secure it. I've previously been hosting it off a VM in the house, but I want to get rid of that. (HowTos)

Why is dhclient issuing a unicast DHCPREQUEST every ~15 seconds instead of at T1/T2 timers?view story

http://serverfault.com – I am running a CentOS 6.2 server as my gateway and firewall, while also providing some internal services. This is a setup I have had for years using various hardware and distributions (redhat based). Recently I have ran across an internet connectivity issue and I believe it is due to either a flaw with my ISP (Roadrunner, upstate new york) or a flaw with my configuration (default) for dhclient. (HowTos)

Ping Fails for Default Gateway on Bridged Connecting with VirtualBox - Ubuntu 11 Desktopview story

http://askubuntu.com – I'm trying to setup a development server on my computer using Ubuntu 11.10 \n \l (Desktop, 64bit AMD) and VirtualBox 4.1.8r. I have installed the Guest Addtitions from the VirtualBox "Devices" > "Install Guest Additions" menu. The installation went smoothly, and I was able to connect to the internet using the default NAT network setup. (HowTos)

Sane for Whom?view story

http://www.unix.com – We have satellite modems and small servers installed in plenty of odd, rough, remote rural places, and satellite modems can be persnickety beasts. The provider claims they're all identical but some hand out static IP's over dhcp, some don't. Some respond to DHCP, some don't. (HowTos)

can't ping one specific IP on the internet, all others workview story

http://askubuntu.com – This is driving me insane. I have a number of PCs behind a NAT. They all access the local net and the internet just fine, ping, http, etc. (HowTos)

Inserting a nat solution into a network while it's not the gatewayview story

http://unix.stackexchange.com – I have tried this a few different ways. Currently trying with pf on freebsd 8.2 I am trying to insert a nat solution into an existing network that will redirect traffic from an outside ip address to an inside ip address on all ports (static nat) but I also want to translate the source address. Current network. (HowTos)