Sudo setcap cap_net_raw,cap_net_admin+eip dynamips Creating Persistent tun/tap InterfacesĪdditional software is required to create the logical interfaces for cloud devices. Change to theĮxecutable's directory (/usr/local/bin) and run the following command: Have the correct permissions for tun/tap devices. This can be doneĮither through sysctl -w .disable_ipv6=1 and sysctl -w .You install dynamips from source on Ubuntu, the executable will not In such a case, you can disable IPv6 on your machine. When DNS names are resolved to IPv6 addresses locally, this becomes a problem as the proxy will beĪsked to open connections to IPv6 destinations. When using virtual DNS, this is not a problem as DNS names are resolved by Some proxy servers might not support IPv6. A hacky solution to prevent this consists in making the file immutable as follows: Note that software like the NetworkManager may change the /etc/nf file automatically at any time, which When virtual DNS is working correctly, you will see log messages likeĭNS query: for hostnames which your machine is connecting to after having resolved them through DNS. In this case, it may be advisable to update your /etc/nf file to use a nameserver address that is routed Will not be performed through the tunnel interface, since the routes to localhost or your local network are more When DNS resolution is performed by a service on your machine or through a server in your local network, DNS resolution Supplied as -proxy This works analogously to curl's -proxy argument. For example, an HTTP proxy at 1.2.3.4:3128 with a username of john.doe and a password of secret is A proxy is supplied to the -proxy argument in the v, -verbosity Verbosity level Ĭurrently, tun2proxy supports HTTP, SOCKS4/SOCKS4a and SOCKS5. bypass-ip Public proxy IP used in routing setup which should bypassing the tunnel p, -proxy Proxy URL in the form -dns DNS handling strategy tun-mtu MTU of the tun interface (only with tunnel file descriptor) tun-fd File descriptor of the tun interface The routes will be automatically deleted with the tunnel device. When you terminate this program and want to eliminate the impact caused by the above several commands, In that case, you might need an additional tool like dnsproxy that isĬonfigured to listen on a local UDP port and communicates with a third-party upstream DNS server via TCP. This enables an out-of-the-box experience in most cases, without relying on third-party resolvers or applications.ĭepending on your use case, you may want to disable this feature using -dns none. Range will supply the proxy with the mapped query name instead of the IP address. Connections destined for an IP address from that When a DNS packet to port 53 is detected, an IPĪddress from 198.18.0.0/15 is chosen and mapped to the query name. This tool implements a virtual DNS feature that is used by default. Note that if you paste these commands into a shell script, which you then run with sudo, you might want to replace target/release/tun2proxy -tun tun0 -proxy " $PROXY_TYPE:// $PROXY_IP: $PROXY_PORT " Sudo sh -c "echo nameserver 198.18.0.1 > /etc/nf " # Make sure that DNS queries are routed through the tunnel. # If you wish to also route IPv6 traffic through the proxy, these two commands will do. Sudo ip route add " $BYPASS_IP " $(ip route | grep '^default ' | cut -d ' ' -f 2- ) # Route all your traffic through tun0 without interfering with the default route. # To prevent a routing loop, we add a route to the proxy server that behaves # like the default route. Sudo ip tuntap add name tun0 mode tun user $USER # Create a tunnel interface named tun0 which your user can bind to, # so we don't need to run tun2proxy as root. # The proxy type can be either SOCKS4, SOCKS5 or HTTP.
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