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Tag Archives: IPv6

Enable IPv6 in OpenVPN

08 Tuesday Nov 2016

Posted by Fakrul Alam in My Work, Tutorial

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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

18 Thursday Sep 2014

Posted by Fakrul Alam in My Work

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bangladesh, IPv6

IPv6 Traceroute

14 Wednesday Nov 2012

Posted by Fakrul Alam in Uncategorized

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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

18 Tuesday Sep 2012

Posted by Fakrul Alam in Uncategorized

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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.

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