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Migrated BGP Flow spec docs to site

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Pavel Odintsov 2017-12-03 12:29:16 +00:00 committed by GitHub
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docs/BGP_FLOW_SPEC.md
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### All this docs about ExaBGP 4.0 (Git master branch)
Clone code:
```bash
cd /usr/src/
git clone https://github.com/Exa-Networks/exabgp.git
```
They are not compatible with ExaBGP 3.0
vim /root/announcer.py:
```bash
#!/usr/bin/python
fl=open("/var/run/exabgp.cmd", "w")
fl.write("announce flow route source 4.0.0.0/24 destination 127.0.0.0/24 protocol [ udp ] source-port [ =53 ] destination-port [ =80 ] packet-length [ =777 =1122 ] fragment [ is-fragment dont-fragment ] rate-limit 1024" + '\n')
fl.flush()
fl.close
```
Please be careful about flush and trailing '\n'!!!
vim /etc/exabgp_flowspec.conf:
```bash
process announce-routes {
run /usr/bin/socat stdout pipe:/var/run/exabgp.cmd;
encoder json;
}
neighbor 127.0.0.1 {
router-id 1.2.3.4;
local-address 127.0.0.1;
local-as 1;
peer-as 1;
group-updates false;
family {
ipv4 flow;
}
api {
processes [ anounce-routes ];
}
}
```
Run it:
```bash
cd /usr/src/exabgp
env exabgp.api.file=/tmp/exabgp.cmd exabgp.daemon.user=root exabgp.daemon.daemonize=false exabgp.daemon.pid=/var/run/exabgp.pid exabgp.log.destination=/var/log/exabgp.log sbin/exabgp --debug /etc/exabgp_flowspec.conf
```
Then, please install Git version of FastNetMon (stable version do not support this features yet):
```bash
wget https://raw.githubusercontent.com/FastVPSEestiOu/fastnetmon/master/src/fastnetmon_install.pl -Ofastnetmon_install.pl
sudo perl fastnetmon_install.pl --use-git-master
```
FastNetMon configuration /etc/fastnetmon.conf:
```bash
# This options are mandatory for Flow Spec attack detector
collect_attack_pcap_dumps = on
process_pcap_attack_dumps_with_dpi = on
exabgp = on
exabgp_command_pipe = /var/run/exabgp.cmd
exabgp_community = 65001:666
exabgp_next_hop = 10.0.3.114
exabgp_flow_spec_announces = on
# Please switch off unicast BGP announces with ExaBGP because they are not compatible with Flow Spec
exabgp_announce_whole_subnet = no
exabgp_announce_host = no
```
Be aware! We will announce rules with discard option!
Currently we support only most popular amplification attack types:
- DNS amplification (we drop all udp traffic originating from 53 port)
- NTP amplification (we drop all udp traffic originating from 123 port)
- SSDP amplification (we drop all udp traffic originating from 1900 port)
- SNMP amplification (we drop all udp traffic originating from 161 port)
We migrated this page to our [site](https://fastnetmon.com/docs/bgp_flow_spec/)