1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
#syntax: simplejson
{
_: "every key starting with an _ is ignored, but kept"
_0: "it can be useful to add comment in the configuration file"
_1: "keep in mind that the configuration has no ordering"
# to make it easier, the simplejson format allows lines of comments too
exabgp: 3
neighbor {
first-peer {
_: "will pass received routes to the program"
tcp {
bind: "82.219.212.34"
connect: "195.8.215.15"
ttl-security: false
md5: "secret"
}
api {
syslog-text: [ "receive-routes" ]
syslog-json: [ "neighbor-changes","send-packets","receive-packets","receive-routes" ]
}
session {
router-id: "82.219.212.34"
hold-time: 180
asn {
local: 65500
peer: 65500
}
capability {
family {
inet4: ["unicast","multicast","nlri-mpls","mpls-vpn","flow-vpn","flow"]
inet6: ["unicast"]
_inet: ["unicast","flow"]
_alias: "all"
_alias: "minimal"
}
asn4: true
route-refresh: true
graceful-restart: false
multi-session: false
add-path: false
}
}
announce: [
"local-routes"
"off-goes-the-ddos"
]
}
}
apis {
_: "the names defined here can be used in the neighbors"
syslog-json {
encoder: "json"
program: "etc/exabgp/run/syslog-1.py"
}
_: "be careful to not loose comment if you use multiple _"
syslog-text {
encoder: "text"
program: "etc/exabgp/processes/syslog-2.py"
}
}
attributes {
normal-ebgp-attributes {
origin: "igp"
as-path: [ 3356, 1239, 38040, 9737 ]
local-preference: 500
aggregator: "10.0.0.1"
atomic-aggregate: false
originator-id: "10.0.0.1"
med: 10
community: [[3356,2], [3356,22], [3356,86], [3356,500], [3356,666], [3356,2064], "no-export"]
large-community: [[2914,0,666], [3320,1299,4]]
cluster-list: []
extended-community: []
}
simple-attributes {
next-hop: "212.73.207.153"
origin: "igp"
as-path: [ 3356, 1239, 38040, 9737 ]
local-preference: 500
aggregator: "10.0.0.1"
atomic-aggregate: false
originator-id: "10.0.0.1"
med: 10
community: [[3356,2], [3356,22], [3356,86], [3356,500], [3356,666], [3356,2064]]
large-community: [[2914,0,666], [3320,1299,4]]
cluster-list: []
extended-community: []
bgp-prefix-sid: [ 300, [ ( 800000,100 ), ( 1000000,5000 ) ] ]
}
}
flows {
filtering-condition {
simple-ddos {
source: "10.0.0.1/32"
destination: "192.168.0.1/32"
port: [[["=",80]]]
protocol: "tcp"
}
port-block {
port: [ [["=",80 ]],[["=",8080]] ]
destination-port: [ [[">",8080],["<",8088]], [["=",3128]] ]
source-port: [[[">",1024]]]
protocol: [ "tcp", "udp" ]
}
complex-attack {
packet-length: [ [[">",200],["<",300]], [[">",400],["<",500]] ]
_fragment: ["is-fragment"]
fragment: ["first-fragment","last-fragment" ]
_icmp-type: [ "unreachable", "echo-request", "echo-reply" ]
icmp-code: [ "host-unreachable", "network-unreachable" ]
tcp-flags: [ "urgent", "rst" ]
dscp: [ 10, 20 ]
}
}
filtering-action {
make-it-slow {
rate-limit: 9600
}
drop-it {
discard: true
}
send-it-elsewhere {
redirect: "65500:12345"
}
send-it-community {
redirect: "1.2.3.4:5678"
community: [[30740,0], [30740,30740]]
}
}
}
updates {
prefix {
local-routes {
normal-ebgp-attributes {
192.168.0.0/24 {
next-hop: "192.0.2.1"
}
192.168.0.0/24 {
next-hop: "192.0.2.2"
}
}
simple-attributes {
_: "it is possible to overwrite some previously defined attributes"
192.168.1.0/24 {
next-hop: "192.0.2.1"
}
192.168.2.0/24 {
}
}
}
remote-routes {
simple-attributes {
10.0.0.0/16 {
_: "those three can be defined everywhere too, but require the right capability"
label: [0, 1]
path-information: 0
route-distinguisher: "1:0.0.0.0"
split: 24
}
}
}
}
flow {
off-goes-the-ddos {
simple-ddos: "make-it-slow"
port-block: "drop-it"
}
saved_just_in_case {
complex-attack: "send-it-elsewhere"
}
}
}
}
|
