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I want to split Labicolo up in two networks, since
it is a bit silly that we have a internet exchange
prefix allocation, when all members of the IX are
already connected to the same layer 2 network, when
they all have transit through the same network.
Therefore by splitting Labicolo into 2 networks,
we ensure that there is a need for the internet
exchange, since not all nodes are able to talk
directly to eachother over the transit layer 2
network.
Since it would be a bit excessive to allocate another
/26 to Labicolo, thereby using half of our IPv4 space
for Labicolo.
This patch reduces the the current Labicolo network to
a /27 network, a subsequent patch will then add a
second Labicolo network with the other /27 network.
The only issue here is that Labicolo machines, which
haven't been updated to have a /27 netmask, will not
be able to reach endpoints in 185.38.175.96/27, before
they fix their netmask.
Signed-off-by: Asbjørn Sloth Tønnesen <asbjorn@labitat.dk>
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These nodes should be documented in the wiki:
https://labitat.dk/wiki/Labicolo
Signed-off-by: Asbjørn Sloth Tønnesen <asbjorn@labitat.dk>
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Move the Tor exit nodes to their own VLAN, and
their own address space.
Background for move
-------------------
For the first Tor exit node, we where able to
create inet6num object 2a01:4262:1ab:20::71/128.
So we could assign a specific Tor abuse contact.
When we added the second node it was no longer
possible to create /128 inet6num objects, but
only up to /64. We therefore need to move our
Tor exit nodes to a dedicated address space.
Connection tracking
-------------------
Connection tracking is quite expensive, so
it's better to only do it for Tor traffic,
when we actually need it, which is only when
internal clients need to access the servers.
In the future conntrack could also be disabled
for labicolo in general.
Current stats
~~~~~~~~~~~~~
[root@space ~]# grep -v '185\.38\.175\.7[12] ' /proc/net/nf_conntrack |
grep -v '2a01:4262:01ab:0020:0000:0000:0000:007[12]' | wc -l
4071
[root@space ~]# wc -l /proc/net/nf_conntrack
39138 /proc/net/nf_conntrack
Currently 4071 out of 39138 connections are not Tor related.
Also reading /proc/net/nf_conntrack is quite slow atm.:
[root@space ~]# time cat /proc/net/nf_conntrack > /dev/null
real 0m35.097s
user 0m0.010s
sys 0m28.114s
Signed-off-by: Asbjørn Sloth Tønnesen <asbjorn@labitat.dk>
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Signed-off-by: Asbjørn Sloth Tønnesen <asbjorn@labitat.dk>
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- Align addresses
- Prefix ipv4 addresses by network bits + 1 *s
- Prefix ipv6 addresses by network nibbles + 1 *s
- Fix labitat prefix
- Add spacewand and spacebrain addresses
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