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Create generic filters for IPv6

This commit is contained in:
Jesper Hess 2018-10-13 20:56:18 +02:00
parent 4c30e76e53
commit dddb9217ac
Signed by: graffen
GPG Key ID: 351A89E40D763F0F
3 changed files with 32 additions and 36 deletions
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3
bgp4.conf
View File

@ -1,8 +1,6 @@
template bgp dnpeers {
local as OWNAS;
table T_BGP;
# metric is the number of hops between us and the peer
path metric 1;
import keep filtered;
import where dnpeers_import_policy();
@ -29,7 +27,6 @@ template bgp iBGP_Peer {
}
template pipe iBGP_Pipe {
# table name will come from peer definition
peer table master;
import all;
export all;

42
bgp6.conf
View File

@ -1,16 +1,15 @@
template bgp dnpeers {
local as OWNAS;
table T_BGP;
# metric is the number of hops between us and the peer
path metric 1;
# this line allows debugging filter rules
# filtered routes can be looked up in birdc using the "show route filtered" command
import keep filtered on;
import all;
export all;
import where dnpeers_import_policy();
export filter {
if is_valid_network() then {
accept;
}
reject;
};
};
template bgp iBGP_Peer {
@ -28,38 +27,15 @@ template bgp iBGP_Peer {
}
template pipe iBGP_Pipe {
# table name will come from peer definition
peer table master;
import all;
export all;
}
roa table dn42_roa6 {
include "/var/lib/bird/bird6_roa_dn42.conf";
};
protocol pipe {
table master;
peer table T_BGP;
import filter {
if (roa_check(dn42_roa6, net, bgp_path.last) = ROA_INVALID) then {
print "[dn42] ROA check failed for ", net, " ASN ", bgp_path.last;
reject;
}
# accept every subnet, except our own advertised subnet
# filtering is important, because some guys try to advertise routes like 0.0.0$
if is_valid_network() && !is_self_net() then {
accept;
}
reject;
};
export filter {
# here we export the whole net
if is_valid_network() then {
accept;
}
reject;
};
import all;
export all;
};

23
filter6.conf
View File

@ -8,3 +8,26 @@ function is_valid_network() {
];
}
roa table dn42_roa {
include "/var/lib/bird/bird6_roa_dn42.conf";
};
function check_roa() {
if (roa_check(dn42_roa, net, bgp_path.last) = ROA_INVALID) then {
print "[dn42] ROA check failed for ", net, " ASN ", bgp_path.last;
return false;
}
return true;
}
function import_filter_networks() {
if is_valid_network() && !is_self_net() then {
return true;
}
return false;
}
function dnpeers_import_policy() {
if(!check_roa()) then return false;
if(!import_filter_networks()) then return false;
}