Enable IPv6 in OpenVPN

Tags

IPv6, OpenVPN

In my earlier post (OpenVPN in Ubuntu 14.04) I have gone through the steps to install OpenVPN in Ubuntu; that was only for IPv4. To enable IPv6 in OpenVPN do the followings:

OpenVPN Server IP : 2001:df2:ee00:ee00::10/64

2001:df2:ee00:abcd::/64 has been routed to the OpenVPN server host. That mean users connected via OpenVPN will get one prefix from 2001:df2:ee00:abcd::/64 block.

Step 1: We need to edit OpenVPN configuration file and enable IPv6 tunnel service

vi /etc/openvpn/server.conf

Add the following :

server-ipv6 2001:0df2:ee00:abcd::/64
tun-ipv6
push tun-ipv6
ifconfig-ipv6 2001:0df2:ee00:abcd::1 2001:0df2:ee00:abcd::2
push "route-ipv6 2001:0df2:ee00:ee00::2/64"
push "route-ipv6 2000::/3"

Step 2: Enable IPv6 forwarding:

echo 1 > /proc/sys/net/ipv6/conf/all/forwarding

Step 3: Reload OpenVPN Service

/etc/init.d/openvpn restart

Try connect your OpenVPN client. Test the IPv6 reachablity by accessing http://test-ipv6.com/

Note:
1. To make IPv6 forwarding persistent remember, in /etc/sysctl.conf uncomment:
net.ipv6.conf.all.forwarding = 1

2. Make sure that you route 2001:df2:ee00:abcd::/64 to you OpenVPN Server. I have done this from my cisco router

ipv6 route 2001:df2:ee00:abcd::/64 2001:df2:ee00:ee00::10

[bdNOG1] IPv6 Deployment Status in Bangladesh

Tags

bangladesh, IPv6

IPv6 Traceroute

Tags

IPv6

That’s how a IPv6 traceroute look like:

FakrulMac:NANOG rapappu$ traceroute6 www.gmail.com
traceroute6 to googlemail.l.google.com (2404:6800:4001:c01::53) from 2405:7600:0:6::96, 64 hops max, 12 byte packets
 1  server-router.dhakacom.com  0.717 ms  0.746 ms  0.717 ms
 2  2405:7600:0:1::2  0.963 ms  0.847 ms  0.808 ms
 3  2404:d900:0:b::1  0.731 ms  0.713 ms  0.619 ms
 4  te0-0-0-core01.bdhub.com  0.897 ms  0.985 ms  0.904 ms
 5  bdhub.palermo9.pal.seabone.net  146.300 ms  146.026 ms  146.115 ms
 6  2001:4860:1:1::1a6a:0:22  204.383 ms  205.574 ms  204.252 ms
 7  2001:4860:1:1::1a6a:0:22  234.823 ms  204.425 ms  204.421 ms
 8  2001:4860::1:0:1c5  207.115 ms
    2001:4860::1:0:337f  207.240 ms  207.175 ms
 9  2001:4860::1:0:3c0  216.149 ms  211.091 ms  215.788 ms
10  2001:4860::2:0:3c7  217.208 ms  219.557 ms
    2001:4860::2:0:3c6  220.778 ms
11  * * *
12  2404:6800:4001:c01::53  217.632 ms  212.588 ms  213.390 ms

Build BIND rDNS Zone

Tags

DNS PTR Record, IPv6, Reverse DNS

Struggling with Reverse DNS of IPv6? It’s really boring to go through those nibble and write the PTR record. Checkout the bellow link:

http://rdns6.com/zone

Just provide IPv6 delegation, Name Server Information, IPv6 Address, FQDN and TTL. It will PTR record and related zone file configuration for you. I found this site very helpful; hope you will get the same.