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<<<<<<< HEAD:Shorewall/changelog.txt
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Changes in Shorewall 4.4.5.1
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1) Handle rp_filter and kernel's 2.6.31 and later.
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>>>>>>> 3d3c2eb... Update release documents for rp_filter fix:Shorewall/changelog.txt
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Changes in Shorewall 4.4.5
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Changes in Shorewall 4.4.5
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1) Fix 15-port limit removal change.
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1) Fix 15-port limit removal change.
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@ -169,51 +169,6 @@ Shorewall 4.4.5
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now, if the zone has <interface>:0.0.0.0/0 (even with exclusions),
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now, if the zone has <interface>:0.0.0.0/0 (even with exclusions),
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then it may have no additional members in /etc/shorewall/hosts.
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then it may have no additional members in /etc/shorewall/hosts.
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----------------------------------------------------------------------------
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P R O B L E M S C O R R E C T E D I N 4 . 4 . 5 . 1
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----------------------------------------------------------------------------
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1) In kernel 2.6.31, the handling of the rp_filter interface option was
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chan ged incompatibly. Previously, the effective value was determined
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by the setting of net.ipv4.config.dev.proxy_arp logically ANDed with
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the setting of net.ipv4.config.all.proxy_arp.
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Beginning with kernel 2.6.31, the value is the arithmetic MAX of
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those two values.
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Given that Shorewall sets net.ipv4.config.all.proxy_arp to 1 if
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there are any interfaces specifying 'routefilter', specifying
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'routefilter' on any interface has the effect of setting the option
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on all interfaces.
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To allow Shorewall to handle this issue, a number of changes were
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necessary:
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a) There is no way to safely determine if a kernel supports the
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new semantics or the old so the Shorewall compiler uses the
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kernel version reported by uname.
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b) This means that the kernel version is now recorded in
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the capabilities file. So if you use capabilities files, you
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need to regenerate the file with Shorewall[-lite] 4.4.5.1.
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c) If the capabilities file does not contain a kernel version,
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the compiler assumes version 2.6.30 (the old rp_filter
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behavior).
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d) The ROUTE_FILTER option in shorewall.conf now accepts the
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following values:
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0 or Off - Shorewall sets net.ipv4.config.all.rp_filter to 0.
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1 or On - Shorewall sets net.ipv4.config.all.rp_filter to 1.
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2 - Shorewall sets net.ipv4.config.all.rp_filter to 2.
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Empty - Shorewall does not change the setting of
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net.ipv4.config.all.rp_filter if the kernel version
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is 2.6.31 or later.
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e) The 'routefilter' interface option can have values 0,1 or 2. If
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'routefilter' is specified without a value, the value 1 is
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assumed.
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----------------------------------------------------------------------------
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----------------------------------------------------------------------------
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P R O B L E M S C O R R E C T E D I N 4 . 4 . 5
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P R O B L E M S C O R R E C T E D I N 4 . 4 . 5
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----------------------------------------------------------------------------
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----------------------------------------------------------------------------
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