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country-ip-blocks reviews and mentions
- CIDR country-level IP data, straight from the Regional Internet Registries
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How often do the IP addresses issued to a country change?
Maybe looking at the commit logs/history of https://github.com/herrbischoff/country-ip-blocks gives you some idea about change frequency.
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Who's Attacking My Server?
Looks not-so reliable. Either fetches a list of blocks from https://github.com/herrbischoff/country-ip-blocks which is a random GitHub repository that collects "straight from the Regional Internet Registries" without any stating any sources nor method for gathering it (which also, I'm assuming, is self-reported data from those registries), or it fetches it from https://www.ipdeny.com/ which currently runs with an expired TLS certificate, which on top of everything, nft-blackhole ignores any issues with certificates anyways, leaving it wide open to MITM attacks (https://github.com/tomasz-c/nft-blackhole/blob/8a656ac0a803a...)
I wouldn't run that if I'd want something to reliably block someone from a specific country.
- Ukraine government websites down as it is bombarded by cyberattacks amid Russian invasion.
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Create a script to block countries on an Azure NSG
#requires -Version 3.0 -Modules Az.Network function Get-OdCountryIpAddressCidrList { [CmdletBinding( DefaultParameterSetName = 'code' )] param ( # ISO 3166 country [Parameter( ParameterSetName = 'country' )] [string[]] $CountryName, # ISO 3166 2 character code [Parameter( ParameterSetName = 'code' )] [string[]] $CountryAlpha2Code, # IP protocol [Parameter( Mandatory )] [ValidateSet('Ipv4', 'Ipv6')] [string] $Protocol ) begin { $ErrorActionPreference = 'stop' try { $CountryCodeUrl = 'https://restcountries.eu/rest/v2/all' $Iso3166CountryList = Invoke-RestMethod -Uri $CountryCodeUrl -Verbose:$false -ErrorAction Stop $date = Get-Date -Format 's' $CountryList = [System.Collections.Generic.List[psobject]]::new() } # NOTE: When you use a SPECIFIC catch block, exceptions thrown by -ErrorAction Stop MAY LACK # some InvocationInfo details such as ScriptLineNumber. # REMEDY: If that affects you, remove the SPECIFIC exception type [System.ArgumentException] in the code below # and use ONE generic catch block instead. Such a catch block then handles ALL error types, so you would need to # add the logic to handle different error types differently by yourself. catch [System.ArgumentException] { # get error record [Management.Automation.ErrorRecord]$e = $_ # retrieve information about runtime error $info = [PSCustomObject]@{ Exception = $e.Exception.Message Reason = $e.CategoryInfo.Reason Target = $e.CategoryInfo.TargetName Script = $e.InvocationInfo.ScriptName Line = $e.InvocationInfo.ScriptLineNumber Column = $e.InvocationInfo.OffsetInLine } # output information. Post-process collected info, and log info (optional) $info } catch { $PSCmdlet.WriteError( $PSItem ) } } process { $ErrorActionPreference = 'stop' try { if ($PSCmdlet.ParameterSetName -eq 'country') { foreach ($name in $CountryName) { $country = $Iso3166CountryList | Where-Object -Property name -EQ -Value $name if ($country) { $CountryList.Add($country) } else { $CountryNotFoundMessage = "Cound not find ISO 3166-2 country '$name'. ISO 3166-2 list retrieved from $CountryCodeUrl on $date." Write-Error -Message $CountryNotFoundMessage } } } else { foreach ($code in $CountryAlpha2Code) { $country = $Iso3166CountryList | Where-Object -Property alpha2Code -EQ -Value $code if ($country) { $CountryList.Add($country) } else { $CodeNotFoundMessage = "Cound not find ISO 3166-2 country code for '$code' in list. ISO 3166-2 list retrieved from $CountryCodeUrl on $date." Write-Error -Message $CodeNotFoundMessage } } } } catch { $PSCmdlet.WriteError( $PSItem ) } } end { $ErrorActionPreference = 'stop' try { $headers = @{ Accept = 'application/vnd.github.v3.raw' } $IpList = foreach ($entry in $CountryList) { $IsoCode = $entry.alpha2Code $IsoName = $entry.Name $path = '{0}/{1}.cidr' -f $Protocol, $IsoCode [uri]$uri = 'https://api.github.com/repos/herrbischoff/country-ip-blocks/contents/{0}' -f $path.ToLower() Write-Verbose -Message "Retrieving country IPs for $IsoName ($IsoCode)" [PSCustomObject][ordered]@{ Country = $IsoName Code = $IsoCode TopLevelDomain = $entry.topLevelDomain CidrList = ((Invoke-RestMethod -Method Get -Uri $uri -Headers $headers -Verbose:$false).Split([System.Environment]::NewLine, [System.StringSplitOptions]::RemoveEmptyEntries) -split "`n").Trim() CidrListSource = 'https://github.com/herrbischoff/country-ip-blocks/blob/master/{0}' -f $path.ToLower() } } $IpList | Sort-Object -Property Code } catch { $PSCmdlet.WriteError( $PSItem ) } } } $CountryCodeUrl = 'https://restcountries.eu/rest/v2/all' $Iso3166CountryList = Invoke-RestMethod -Uri $CountryCodeUrl -Verbose:$false $nsg = Get-AzNetworkSecurityGroup -Name 'LOL' $port = 8081 ForEach ($country in $Iso3166CountryList) { $CountryName = $country.name If ($CountryName -eq "New Zealand") { $CN = $country.alpha2Code $IPRanges = Get-OdCountryIpAddressCidrList -Protocol Ipv4 -CountryAlpha2Code $CN $IPRangeCidr = $IPRanges.CidrList ForEach ($range in $IPRangeCidr) { IF ($count -eq $null) { $count = 1 } $char = ([char](96 + $count)) $count++ IF ($priority -eq $null) { $priority = 100 } $priority++ $nsg | Add-AzNetworkSecurityRuleConfig -Name "Allow_$($CN)_$($char)" -Description "Allows access from $Countryname" -Access Allow ` -Protocol * -Direction Inbound -Priority $priority -SourceAddressPrefix "$range" -SourcePortRange * ` -DestinationAddressPrefix * -DestinationPortRange * $nsg | Set-AzNetworkSecurityGroup }} }
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A note from our sponsor - InfluxDB
www.influxdata.com | 2 May 2024
Stats
herrbischoff/country-ip-blocks is an open source project licensed under Creative Commons Zero v1.0 Universal which is not an OSI approved license.
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