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Exposing Raspberry to Internet
Exposing Raspberry to Internet

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Zeile 12: Eine Zeile geändert.
Port xxx # set port here
Port xx x # set port here
Zeile 63: 3 Zeilen gelöscht.
Zeile 68: Eine Zeile geändert.
! 1. Register your home computer (Windows) at a dyndns service to provide the current ipv6, see [dynv6.com|https://dynv6.com]
!Steps:
# register your home computer (Windows) at a dyndns service to provide the current ipv6, see [dynv6.com|https://dynv6.com]
# Windows: create windows batch script to update dynv6
# Windows schedule script to run each time the PC is booted, see "Aufgabenplanung" (task scheduler)
# Raspberry: create and set iptables ruleset
# Raspberry: use python script to query the current ipv6 from dynv6 (Windows) and replace in iptables ruleset
# Raspberry: schedule the ipv6 update in firewall (ip6tables)
Zeile 70: Eine Zeile geändert.
! 2. Windows: create script (I use python) to set local IP at dynv6
!2. Windows batch script to update dynv6 service
Zeile 72: 3 Zeilen geändert.
import socket # determine ipv6
import re # regular expression
import urllib.request # http
REM update_dynv6.bat
Zeile 76: 3 Zeilen geändert.
dynv6_domain = "your.dynv6.domain"
dynv6_token="your.token"
local_domain = socket.gethostname()
REM set utf-8
chcp 65001
Zeile 80: Eine Zeile geändert.
print('Checking DynV6', dynv6_domain, 'against', local_domain)
echo off
set domain=<your.domain.here>
set token=<youtTokenHere>
Zeile 82: 2 Zeilen geändert.
#ipv6_regex = "^([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}$"
ipv6_regex = "^([0-9a-fA-F]{1,4}:).*$"
echo ---- check and update local ipv6 address at dynv6.com for %domain% ----
Zeile 85: Eine Zeile geändert.
##--- get LOCAL address ---
rem ping -n 1 -6 %domain%
for /F "tokens=3" %%i in ('"ping -n 1 -6 %domain% | findstr Antwort"') do set dynv6_ipv6=%%i
rem cut last colon, example 2a02:5a0:4110:f590:29f6:40ba:51b4:b4da:
set dynv6_ipv6=%dynv6_ipv6:~0,-1%
echo dynv6 ipv6= %dynv6_ipv6%
Zeile 87: 7 Zeilen geändert.
tupel = socket.getaddrinfo(local_domain, None, socket.AF_INET6, flags=socket.AI_CANONNAME)
local_ipv6 = ''
for item in tupel:
if(item[4][0].startswith('2a02')):
#print("item=", item)
local_ipv6 = item[4][0]
break
rem ipconfig
rem echo ---------- extracting Temporäre IPv6-Adresse ----------
for /F "tokens=9" %%i in ('"ipconfig | findstr Temp | findstr 2a02"') do set local_ipv6=%%i
echo local ipv6= %local_ipv6%
Zeile 95: 7 Zeilen geändert.
local_ipv6_valid = False
if re.search(ipv6_regex, local_ipv6):
local_ipv6_valid = True
if(local_ipv6_valid == False):
print("local_ipv6=", local_ipv6, " NOT VALID")
else:
print("local_ipv6=", local_ipv6, " IS VALID")
if %local_ipv6% == %dynv6_ipv6% (
echo ipv6 at dynv6 is up to date, update skipped
) else (
set url="https://dynv6.com/api/update?hostname=%domain%^&token=%token%&ipv6=%ipv6%"
ECHO updating IPv6
curl "%url%"
)
Zeile 103: 35 Zeilen gelöscht.
#--- get dynV6 address ---
tupel = socket.getaddrinfo(dynv6_domain, None, socket.AF_INET6)
dynv6_ipv6 = tupel[0][4][0]
dynv6_ipv6_valid = False
if re.search(ipv6_regex, dynv6_ipv6):
dynv6_ipv6_valid = True
if(dynv6_ipv6_valid == False):
print("dynv6_ipv6=", dynv6_ipv6, " NOT VALID")
else:
print("dynv6_ipv6=", dynv6_ipv6, " IS VALID")
if(not local_ipv6_valid or not dynv6_ipv6_valid):
print("one ipv6 is invalid, skipping update")
else:
if(local_ipv6 == dynv6_ipv6):
print("dynv6 ipv6 is up to date, skipping update")
else:
print("dynv6 differs from local ipv6 => UPDATING...")
url = "https://dynv6.com/api/update?hostname=" + dynv6_domain + "&token=" + dynv6_token + "&ipv6=" + local_ipv6
response = urllib.request.urlopen(url).read()
print(response)
}}}
! 3. Windows: schedule script to run each time the PC is booted, see "Aufgabenplanung" (task scheduler)
I scheduled this batch
{{{
echo off
REM set utf-8
chcp 65001
python "G:\Raspberry PI5 8GB\DynDNS\update_computer.py"
Zeile 143: Eine Zeile geändert.
! 4. Raspberry: create and set iptables ruleset, see [Firewall with iptables]
! iptables
{{{
> sudo ip6tables -nvL --line-numbers -L
}}}
See my general ruleset at [Firewall with iptables]
Zeile 145: 2 Zeilen geändert.
! 5. Raspberry: use python script to query the current ipv6 from dynv6 (Windows) and replace in iptables ruleset
Notes:
!! Python
Zeile 149: Eine Zeile geändert.
* alternatively you can use subprocess.run to call the original system commands (easiest)
* alternatively you can use subprocess.run to call the original system commands
! 5. subprocess
Zeile 155: 7 Zeilen geändert.
def set_dynv6_domain_into_ipv6tables(dynv6_domain, rulenum):
try:
print('------------------------------------------------------------')
print('set dynv6 domain', dynv6_domain, 'into ip6tables at position', rulenum)
tupel = socket.getaddrinfo(dynv6_domain, None, socket.AF_INET6)
# tupel like [(<AddressFamily.AF_INET6: 23>, 0, 0, '', ('2a02:5a0:4110:f590:4670:9876:1345:ee', 8384, 0, 0))]
print("tupel=", tupel)
tupel = socket.getaddrinfo('your.pc.com', None, socket.AF_INET6)
# tupel like [(<AddressFamily.AF_INET6: 23>, 0, 0, '', ('2a02:5a0:4110:f590:4670:d3e6:f2bc:ee', 8384, 0, 0))]
print("tupel=", tupel)
Zeile 163: 2 Zeilen geändert.
ipv6=tupel[0][4][0]
print(dynv6_domain + " ipv6=", ipv6)
ipv6=tupel[0][4][0]
print("ipv6=", ipv6)
Zeile 166: 10 Zeilen geändert.
subprocess.run(["/usr/sbin/ip6tables", "-R", "INPUT", rulenum, "-s", ipv6, "-j", "ACCEPT"])
subprocess.run(["/usr/sbin/ip6tables", "-R", "OUTPUT", rulenum, "-d", ipv6, "-j", "ACCEPT"])
except BaseException:
print('FAILED TO GET', dynv6_domain)
set_dynv6_domain_into_ipv6tables('your.dynv6.domain.no1', '1')
set_dynv6_domain_into_ipv6tables('your.dynv6.domain.no2', '2')
set_dynv6_domain_into_ipv6tables('your.dynv6.domain.no3', '3')
subprocess.run(["/usr/sbin/ip6tables", "-R", "INPUT", "1", "-s", ipv6, "-j", "ACCEPT"])
subprocess.run(["/usr/sbin/ip6tables", "-R", "OUTPUT", "1", "-d", ipv6, "-j", "ACCEPT"])
Zeile 178: Eine Zeile geändert.
! 6. Raspberry: schedule the ipv6 update in firewall (ip6tables) via crontab
! 6. Schedule script with crontab
Zeile 183: 5 Zeilen geändert.
# m h dom mon dow command
*/5 * * * * /home/markus/update_ip6tables.py > /var/log/con.log
#check with
> journalctl -b
*/5 * * * * /home/markus/update_ip6tables.py
Diese Seite (Version-31) wurde zuletzt am 30-Juni-2025 18:51 von Administrator geändert.Top