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Strengstatistikk

Strings percent Vertslagrede strenger Words percent Vertslagrede ord Tegnprosent Vertslagrede tegn
Total 61 2 591 15 299
Oversatt 1% 1 1% 2 1% 20
Trenger redigering 0% 0 0% 0 0% 0
Skrivebeskyttet 0% 0 0% 0 0% 0
Feilende kontroller 0% 0 0% 0 0% 0
Strenger med forslag 0% 0 0% 0 0% 0
Uoversatte strenger 98% 60 99% 2 589 99% 15 279
Siste 12 måneder Previous

Aktivitet siste 12 måneder

3 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 0 endringer 3 endringer 0 endringer 0 endringer
Jan Feb Mar Apr Mai Jun Jul Aug Sep Okt Nov Des

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2 591
Vertslagrede ord
61
Vertslagrede strenger
1%
Oversatt
0
Bidragsytere
and previous 30 days

Trends of last 30 days

—
Vertslagrede ord
+100%
—
Vertslagrede strenger
+100%
—
Oversatt
+1%
—
Bidragsytere
+100%
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Now it is necessary to build and install the new kernel. You may find detailed instructions in the extref:{handbook}kernelconfig[Building and Installing a Custom Kernel, kernelconfig-building] section of the FreeBSD Handbook.
 
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New in FreeBSD 4.0, is the concept of stateful filtering. This is a big improvement for UDP traffic, which typically is a request going out, followed shortly thereafter by a response with the same set of IP addresses and port numbers (but with source and destination reversed, of course). For firewalls that have no statekeeping, there is almost no way to deal with this sort of traffic as a single session. But with a firewall that can "remember" an outgoing UDP packet and, for the next few minutes, allow a response, handling UDP services is trivial. The following example shows how to do it. It is possible to do the same thing with TCP packets. This allows you to avoid some denial of service attacks and other nasty tricks, but it also typically makes your state table grow quickly in size.
 
2 år siden
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There are two rules for passing SMTP and DNS traffic towards the mail server and the name server, if you have them. Obviously the whole rule set should be flavored to personal taste, this is only a specific example (rule format is described accurately in the man:ipfw[8] man page). Note that for "relay" and "ns" to work, name service lookups must work _before_ the bridge is enabled. This is an example of making sure that you set the IP on the correct network card. Alternatively it is possible to specify the IP address instead of the host name (required if the machine is IP-less).
 
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Documentation / articles/filtering-bridges/_index — Norsk bokmål

Now it is time to create your own file with custom firewall rules, to secure the inside network. There will be some complication in doing this because not all of the firewall functionalities are available on bridged packets. Furthermore, there is a difference between the packets that are in the process of being forwarded and packets that are being received by the local machine. In general, incoming packets are run through the firewall only once, not twice as is normally the case; in fact they are filtered only upon receipt, so rules that use `out` or `xmit` will never match. Personally, I use `in via` which is an older syntax, but one that has a sense when you read it. Another limitation is that you are restricted to use only `pass` or `drop` commands for packets filtered by a bridge. Sophisticated things like `divert`, `forward` or `reject` are not available. Such options can still be used, but only on traffic to or from the bridge machine itself (if it has an IP address).
 
2 år siden
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