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(→Firewall : Now use nftables instead of iptables: Enable autocompletion in ZSH !!) |
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{{Warning|1=To start I really recommend you to read https://wiki.nftables.org/wiki-nftables/index.php/Main_Page and https://kernelnewbies.org/nftables_examples }} |
{{Warning|1=To start I really recommend you to read https://wiki.nftables.org/wiki-nftables/index.php/Main_Page and https://kernelnewbies.org/nftables_examples }} |
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=== Enable nft autocompletion in ZSH !! == |
=== Enable nft autocompletion in ZSH !! === |
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* '''Problem''': At this time, zsh 5.7.1-1 doesn't include the _nftables completion script for nftables !! |
* '''Problem''': At this time, zsh 5.7.1-1 doesn't include the _nftables completion script for nftables !! |
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Revision as of 09:26, 20 July 2019
Install
Install all my basic useful tools
Here is a command to install all the small tools that are quite useful
apt install vim screen zsh htop iftop iotop subversion git ndisc6 debian-goodies sipcalc pwgen lshw apt-file sudo lvm2 apticron vlan dnsutils whois ldap-utils apt-transport-https xfsprogs rsync
Network
Setup IPv6
Install the dibbler client
apt install dibbler-client
Update the client-duid with the one gaven for IPv6 by your provider
root@cloud:[~]# cat /var/lib/dibbler/client-duid
XX:XX:XX:XX:XX:XX:XX:XX:XX:XX
Edit your /etc/dibbler/client.conf
# Defaults for dibbler-client.
# installed at /etc/dibbler/client.conf by the maintainer scripts
# DDUID is stored in /var/lib/dibbler/client-duid
# 8 (Debug) is most verbose. 7 (Info) is usually the best option
#log-level 7
# To perform stateless (i.e. options only) configuration, uncomment
# this line below and remove any "ia" keywords from interface definitions
# stateless
auth-protocol reconfigure-key
auth-replay monotonic
auth-methods digest-hmac-md5
duid-type duid-ll
inactive-mode
log-level 8
iface eth0 {
# ask for address
#ia
pd
}
Update /etc/network/interfaces with the address to use
iface eth0 inet6 static
address 2001:bc8:1234:1234::1234
netmask 64
accept_ra 2
nftables Firewall : Now use nftables instead of (ip|ip6|arp|eb)tables
 | ip6 |
| One of the main pros that I found was the possibility to merge IPv4 and IPv6 UDP/TCP ports into a single rule using the "table inet filter" |
| You can also use the "sets" to use set if IPs/ports/services/protocols that you can dynamically use in any rule and update it afterwards |
| In the end, the configuration file can be really tiny thanks to the flexibility of the tool |
 | To start I really recommend you to read https://wiki.nftables.org/wiki-nftables/index.php/Main_Page and https://kernelnewbies.org/nftables_examples |
Enable nft autocompletion in ZSH !!
- Problem: At this time, zsh 5.7.1-1 doesn't include the _nftables completion script for nftables !!
- Solution: Manually enable it with the command below
cd /usr/share/zsh/functions/Completion/Linux wget https://raw.githubusercontent.com/zsh-users/zsh-completions/master/src/_nftables
List all rules
root@cloud:[~]# nft list ruleset
table inet filter {
chain input {
type filter hook input priority 0; policy drop;
iif "lo" accept
ct state established,related accept
ct state invalid drop
ip6 saddr fe80::/10 udp dport dhcpv6-client counter packets 26 bytes 3484 accept
ip6 saddr fe80::/10 tcp dport dhcpv6-client counter packets 0 bytes 0 accept
ip6 nexthdr ipv6-icmp accept
ip6 nexthdr ipv6-icmp icmpv6 type { destination-unreachable, packet-too-big, time-exceeded, parameter-problem, mld-listener-query, mld-listener-report, mld-listener-done, nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert, ind-neighbor-solicit, ind-neighbor-advert, mld2-listener-report } accept
ip protocol icmp icmp type { destination-unreachable, echo-request, router-advertisement, router-solicitation, time-exceeded, parameter-problem } accept
tcp dport { ssh, http, https } ct state new accept
}
chain forward {
type filter hook forward priority 0; policy accept;
}
chain output {
type filter hook output priority 0; policy accept;
}
}
List all sets
root@cloud:~# nft add set inet filter blackhole {type ipv4_addr \; }
root@cloud:~# nft add element inet filter blackhole { 1.1.1.1, 2.2.2.2}
root@cloud:~# nft list set inet filter blackhole
table inet filter {
set blackhole {
type ipv4_addr
elements = { 1.1.1.1, 2.2.2.2 }
}
}
System
MariaDB
apt install mysql-server mysql-client
NextCloud
Install Collabora Online
Please follow https://nextcloud.com/collaboraonline/
docker run -t -d -p 127.0.0.1:9980:9980 -e 'domain=www\\.leurent\\.eu\|www\\.leurent\\.ch\|www\\.baillet\\.ch\|www\\.wecxsteen\\.eu' --restart always --cap-add MKNOD collabora/code
Bind9
apt install bind9
Enable DNSSEC for a domain
https://kb.isc.org/docs/aa-00626 https://linux.die.net/man/1/dig https://www.isc.org/downloads/bind/dnssec/ https://ftp.isc.org/isc/dnssec-guide/dnssec-guide.pdf http://www.average.org/dnssec/dnssec-configuring-auto-signed-dynamic-zones.txt
- Verify if your domain is already secured by DNSSEC using https://dnslookup.org/www.leurent.eu/A/#dnssec
- Generate RSA keys to sign the Zone and RRs. Allow bind to read the private key to automatically sign
root@link:[~]# cd /etc/bind/keys
root@link:[/etc/../keys]# dnssec-keygen -K /etc/bind/keys leurent.eu
Generating key pair...+++++ ................................................................................................................+++++
Kleurent.eu.+005+65487
root@link:[/etc/../keys]# dnssec-keygen -f KSK -K /etc/bind/keys leurent.eu
Generating key pair....+++++ .....................+++++
Kleurent.eu.+005+36097
root@link:[/etc/../keys]# chmod g+r /etc/bind/keys/Kleurent.eu.*.private
- Update your /etc/bind/named.conf.local zone
zone "leurent.eu" {
...
...
# look for dnssec keys here:
key-directory "/etc/bind/keys";
# publish and activate dnssec keys:
auto-dnssec maintain;
# use inline signing:
inline-signing yes;
};
- Reload bind9
root@link:[~]# systemctl reload bind9.service 23:22 Wed 27/02/2019
- Once reloaded you should see an additional .signed version of the zone that will be automatically maintained
root@link:[/etc/../leurent]# ll
total 36K
-rw-r--r-- 1 bind bind 515 Apr 11 2017 7.e.7.3.8.c.b.0.1.0.0.2.ip6.arpa.db
-rw-r--r-- 1 bind bind 2.0K Feb 27 23:03 leurent.eu.db
-rw-r--r-- 1 bind bind 512 Feb 27 23:08 leurent.eu.db.jbk
-rw-r--r-- 1 bind bind 19K Feb 27 23:22 leurent.eu.db.signed
-rw-r--r-- 1 bind bind 1.8K Feb 27 23:08 leurent.eu.db.signed.jnl
- Add the public key of your 257 (KSK) and 256 (ZSK)
- Verify the the DS and DNSKEY are visible
MBP-de-Marc:~ marc$ dig +dnssec +short DS leurent.eu @8.8.8.8
65487 5 2 92937B171A4B9156CC812C1ECD74973AD48DF03A4733FD6E401C28B9 61A8F27A
36097 5 2 85619198D6D6EEFE608F59ADC3D3EFECF86452CE1667460B800334B0 B7BEFFC4
DS 8 2 86400 20190306222103 20190227212103 27363 eu. mBn1LoJ/OcNwgLpOYhpG9fkjZPtDfUPcc4ub+JdI0891/vJ1TcbEU6NU nQJ1poXJwps6L7j9gxLqiDR8+mTiSTgCH5JGHPn4wAWU4JEyhlrT3t+t CeFS8voKo70czMY0+LorM7/AnqV68DqLsxkpYlT4t3coQpkgpdEuI2Ev tZ8=
MBP-de-Marc:~ marc$ dig +dnssec +short DNSKEY leurent.eu @8.8.8.8
257 3 5 AwEAAbKf831QWrZcZqzDtbXcdpyBIHvGsnGp3G8HUZvNRQnqKb/tiDDa /8gRzlsO0mFlN1HfBZJlLUWuicj+uV2qjtwfdZkktzD10UkpbbIXKzfP pKx5H77tzcsCa+3x1jzoF5/c0nTi3gLJLxfOVbpZEf1r9KPgxPErzXIl dxl1fP59V3bRLgznNh0TA2t1/+cP4imXyL8LZp3y7NW2nR91ARegGznX 9b5+lCN4WR2vxTU+s3YIbtHNN9bVScC+w58dVNRN4AylniN4ofGnsUpH C/t2uA3rNsSUzBbMbmFJCx9v2+nEB8ki5KSBrrSy8UIvOLLiD527XD0F 8piFl0H9Ln0=
256 3 5 AwEAAeaymGqZKkBwMXSj90IWRVcIbGvlM3JhPdzTmYWeQJPyVGkqgihg IiT+R3ftJ0wRiUSNJSVmRIQYP3UnUUb9AV4ti5xStmAvWbGI+q9Poasg feK8ZghMKPkPTOsfmrNVXIYzOGzv6z5VEpXJG5e7Ho3gVFqXSQZDfwBb tFs/0y6L
DNSKEY 5 2 3600 20190329220145 20190227210145 36097 leurent.eu. W+MlbgrDHCgxHmPB4dLMyyXyDwDxGNiH2FnMDt06dr+vSJBwuVdxwvKo fbxehQRXi/lM0P+/RinWni5dWFhhyhSqQKZj/E+gjxEQEHCuMosGiNx7 LR1KaofLLpeYRo1xEf6YWcc5BjIkA+FB22bdfBVBLhPy9PL6qQO+TGjX rufhkEyaPfsLkXSPraAiAu7IPA+QgE2TbqalsxBHh7rS4g16z3C5yCk2 FaV9BL6W9Dua3Xwnf/xEhrq+befqCPCFl97nhKbBlvXYiZEoqY5jAugS cKTQfNTxPSzmnewKmb6PKmiI2w178gldIA9J+TbyzvMqpCF+AfgAFACw /5PaVA==
DNSKEY 5 2 3600 20190329220145 20190227210145 65487 leurent.eu. w8AAJG/p0pHZE1TRiRN8dPz/b4eUZexQRuJJ8Zdx9QMLWlkc2fo/Dm/a CrLGbpTALBEG0oAAMg7A4qH+pp/LPSwf3QcgfrMF3bo7gb+lqKGCoX6+ JU2t5vJDcNkvl2NgxohVgwS/k4+Z8+xloYqKc9FtisCujHO2n22Z45ez Cxc=
- Verify that your domain is now secured by DNSSEC using https://dnslookup.org/www.leurent.eu/A/#dnssec
Certbot : Manage LetsEncrypt Certificate
| The certificate will be automatically renewed before expiry from the cron file if necessary |
Install certbot > 0.22 to get wildcard support
root@tidus:[~]# apt install certbot python-certbot-apache python3-certbot-dns-rfc2136
- https://certbot-dns-rfc2136.readthedocs.io/en/stable/ will help you create a TSIG keys for auto updates
root@link:[~/LETSENCRYPT]# dnssec-keygen -a HMAC-SHA512 -b 512 -n HOST acme-challenge
Create a new cert for leurent.eu + *.leurent.eu
- Method using DNS to authenticate
root@link:[~]# certbot -d leurent.eu -d "*.leurent.eu" certonly --dns-rfc2136 --dns-rfc2136-credentials ~/.secrets/certbot/rfc2136.ini --dns-rfc2136-propagation-seconds 10
Create a new cert for leurent.ch using webroot folder
- Method creating a file in the web folder
root@tidus:[~]# certbot --authenticator webroot --installer apache --webroot-path /home/web/www.leurent.ch -d leurent.ch -d www.leurent.ch
Force Renewal
root@tidus:[~]# certbot renew --force-renewal
GeoIP
Apache + GeoIP
- Install the needed packages ( NB: You need the contrib repo enabled )
apt install libapache2-mod-geoip geoip-bin geoip-database-contrib
- Here is an extract of /etc/apache2/conf-enabled/cacti.conf to enable GeoIP Restriction
/etc/apache2/conf-enabled/cacti.conf
Alias /cacti /usr/share/cacti/site
# Enable Geoip Module
GeoIPEnable On
GeoIPDBFile /usr/share/GeoIP/GeoIP.dat IndexCache
GeoIPDBFile /usr/share/GeoIP/GeoIPv6.dat IndexCache
# Allow only connection from Switzerland or France
SetEnvIf GEOIP_COUNTRY_CODE FR AllowCountry_cacti
SetEnvIf GEOIP_COUNTRY_CODE_V6 FR AllowCountry_cacti
SetEnvIf GEOIP_COUNTRY_CODE CH AllowCountry_cacti
SetEnvIf GEOIP_COUNTRY_CODE_V6 CH AllowCountry_cacti
<Directory /usr/share/cacti/site>
Options +FollowSymLinks
AllowOverride None
<IfVersion >= 2.3>
Require env AllowCountry_cacti
#Require all granted
</IfVersion>
<IfVersion < 2.3>
Order Allow,Deny
Allow from env=AllowCountry_cacti
</IfVersion>
AddType application/x-httpd-php .php
<IfModule mod_php5.c>
php_flag magic_quotes_gpc Off
php_flag short_open_tag On
php_flag register_globals Off
php_flag register_argc_argv On
php_flag track_vars On
# this setting is necessary for some locales
php_value mbstring.func_overload 0
php_value include_path .
</IfModule>
DirectoryIndex index.php
</Directory>
Iptables + GeoIP
- Install the needed packages
apt install xtables-addons-dkms libtext-csv-xs-perl libnet-cidr-lite-perl
- Get the /usr/lib/xtables-addons/xt_geoip_dl and /usr/lib/xtables-addons/xt_geoip_build of xtables-addons 3.2
- Here is the cron file I use to download and format everything : /etc/cron.monthly/geoip
#/bin/bash
# apt install libnet-cidr-lite-perl libtext-csv-xs-perl
# Create Archives folder
XTGEOIP=/usr/share/xt_geoip/
cd $XTGEOIP
# Download Last Version of GeoLite2-Country
/usr/lib/xtables-addons/xt_geoip_dl
# build copy GeoLite2 Country Databases
cd $XTGEOIP/GeoLite2-Country-CSV_*
/usr/lib/xtables-addons/xt_geoip_build -D $XTGEOIP $XTGEOIP/GeoLite2-Country-CSV_*/*.csv
# remove download GeoLite2 Country Database
rm $XTGEOIP/GeoLite2-Country-CSV_* -rf
SpamAssassin + GeoIP
apt install libgeo-ip-perl
Kibana + Elasticsearch + Logstash: Log Analyser
Kibana is a really powerful log analyser ( big data gathering and analyse )
- Read https://www.elastic.co/guide/en/kibana/current/deb.html and install the repo
- Read https://github.com/robcowart/elastiflow to get up and running with some beautiful netflow analysis
wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -
echo "deb https://artifacts.elastic.co/packages/6.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-6.x.list
echo "deb [arch=amd64] https://packages.elastic.co/curator/5/debian9 stable main" | sudo tee -a /etc/apt/sources.list.d/curator.list
apt update
apt install kibana elasticsearch elasticsearch-curator python-elasticsearch logstash
systemctl enable logstash.service
systemctl enable elasticsearch.service
systemctl enable kibana.service
systemctl start logstash.service
systemctl start elasticsearch.service
systemctl start kibana.service
LDAP user backend
- Install slapd
apt install slapd dpkg-reconfigure slapd
- Backup old server
slapcat -n 0 -l /root/LDAP/slapcat_config_`date +%Y%m%d`.ldif && slapcat -n 1 -l /root/LDAP/slapcat_data_`date +%Y%m%d`.ldif
- Shutdown ldap server
systemctl stop slapd
- Delete config and import config from backup
tar cvzf /root/LDAP/slapd.d_OLD.tgz /etc/ldap/slapd.d && rm -r /etc/ldap/slapd.d mkdir /etc/ldap/slapd.d slapadd -n 1 -F /etc/ldap/slapd.d -l /root/LDAP/slapcat_data_`date +%Y%m%d`.ldif chown -R openldap:openldap /etc/ldap/slapd.d
- Import Data
tar cvzf /root/LDAP/LDAP-old-data.tgz /var/lib/ldap && rm -r /var/lib/ldap mkdir /var/lib/ldap slapadd -n 1 -F /etc/ldap/slapd.d -l /root/LDAP/slapcat_data_`date +%Y%m%d`.ldif chown -R openldap:openldap /var/lib/ldap
- Restart LDAP server
systemctl start slapd
- Install libpam-ldap and libnss-ldap and nscd
# You will be asked for the admin account + an unpriviledged account apt install libnss-ldap libpam-ldap
- Update /etc/nsswitch.conf to add ldap
--- /etc/nsswitch.conf.old 2019-07-20 10:02:48.743787771 +0200
+++ /etc/nsswitch.conf 2019-07-20 10:14:12.422547865 +0200
@@ -4,9 +4,9 @@
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.
-passwd: files systemd
-group: files systemd
-shadow: files
+passwd: files systemd ldap
+group: files systemd ldap
+shadow: files ldap
gshadow: files
hosts: files dns
zsh: exit 1 diff -u /etc/nsswitch.conf.old /etc/nsswitch.conf
Install Phpldapadmin
- Verify if it is available in a backport
apt install phpldapadmin php-xml
- Disable anonymous-read
Netflow
opkg install softflowd
softflowctl expire-all
Mail Platform
apt install postfix spamassassin postfix-policyd-spf-python apt install dovecot-imapd dovecot-managesieved dovecot-pop3d dovecot-sieve apt install roundcube roundcube-mysql roundcube-plugins php-zip php-net-sieve
Update innodb_log_file_size=2024MB for the attachement upload