| Commit message (Collapse) | Author | Age | Files |
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Instead, generate a server certificate for each host (on the machine
itself). Then fetch all these certs locally, and copy them over to each
IPSec peer. That requires more certs to be stored on each machines (n
vs 2), but it can be done automatically, and is easier to deploy.
Note: When adding a new machine to the inventory, one needs to run the
playbook on that machine (to generate the cert and fetch it locally)
first, then on all other machines.
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But not in the installer, as busybox's implementation of mktemp didn't
deprecate -t/-p.
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To be clearer, and to follow the recommendation of the FSF, we include
a full header rather than a single sentence.
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Replaced [ -n "$string" ] with [ "$string" ], and [ -z "$string" ] with
[ ! "$string" ].
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'syslog' is meant for the messages generated internally by syslogd,
whereas 'user' is for user-level messages.
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We use ESP only, so other protocols shouldn't be ACCEPTed.
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Packets originating from our (non-routable) $ipsec are marked; there is
no xfrm lookup (i.e., no matching IPSec association), the packet will
retain its mark and be null routed later on, thanks to
ip rule add fwmark "$secmark" table 666 priority 666
ip route add blackhole default table 666
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Also, use ESP tunnel mode instead of transport mode.
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I.e., as packets are treated along the way: mangle -> nat -> filter.
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At the each IPSec end-point the traffic is DNAT'ed to / MASQUERADE'd
from our dedicated IP after ESP decapsulation. Also, some IP tables
ensure that alien (not coming from / going to the tunnel end-point) is
dropped.
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Also, added some options:
-f force: no confirmation asked
-c check: check (dry-run) mode
-v verbose: see the difference between old and new ruleset
-4 IPv4 only
-6 IPv6 only
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These rules are automatically included by third-party servers such as
strongSwan or fail2ban.
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So it doesn't mess with the high-priority rules regarding IPSec.
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update-firewall.sh -c does not update the firewall, but returns a
non-zero value iff. running it without the switch would modify it.
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