Noma ubani oke wazama ukusebenzisa umshini obonakalayo efwini wazi kahle ukuthi imbobo ye-RDP evamile, uma iyekwa ivuliwe, cishe izohlaselwa amagagasi emizamo ye-password brute force evela kumakheli ahlukahlukene e-IP emhlabeni jikelele.
Kulesi sihloko ngizobonisa ukuthi kanjani Ungakwazi ukumisa impendulo ezenzakalelayo ku-password brute force ngokungeza umthetho omusha ku-firewall. I-Intrust ukuze kuqoqwe, kuhlaziywe futhi kugcinwe idatha engahlelekile, esevele inamakhulu okusabela okuchazwe ngaphambilini ezinhlotsheni ezahlukahlukene zokuhlasela.
Ku-Quest InTrust ungamisa izenzo zokuphendula uma umthetho ucushiwe. Ku-ejenti yokuqoqa amalogi, i-InTrust ithola umlayezo mayelana nomzamo wokugunyaza ongaphumelelanga endaweni yokusebenza noma iseva. Ukuze ulungiselele ukungeza amakheli e-IP amasha ku-firewall, udinga ukukopisha umthetho wangokwezifiso okhona ukuze uthole ukugunyazwa okuningi okuhlulekile futhi uvule ikhophi yakho ukuze uhlelwe:
Imicimbi kulogi ye-Windows isebenzisa okuthile okubizwa ngokuthi i-InsertionString. (lokhu ukungena ngemvume okungaphumelelanga ohlelweni) futhi uzobona ukuthi izinkambu esizithandayo zigcinwe kokuthi InsertionString14 (Igama Lendawo Yokusebenzela) kanye ne-InsertionString20 (Ikheli Lenethiwekhi Yomthombo). Uma uhlasela kusukela ku-inthanethi, inkambu yegama le-Workstation cishe izoba lula kakhulu. ayinalutho, ngakho-ke le ndawo ibalulekile esikhundleni senani elisuka ku-Source Network Address.
Nansi indlela umbhalo womcimbi 4625 obukeka ngayo:
An account failed to log on.
Subject:
Security ID: S-1-5-21-1135140816-2109348461-2107143693-500
Account Name: ALebovsky
Account Domain: LOGISTICS
Logon ID: 0x2a88a
Logon Type: 2
Account For Which Logon Failed:
Security ID: S-1-0-0
Account Name: Paul
Account Domain: LOGISTICS
Failure Information:
Failure Reason: Account locked out.
Status: 0xc0000234
Sub Status: 0x0
Process Information:
Caller Process ID: 0x3f8
Caller Process Name: C:WindowsSystem32svchost.exe
Network Information:
Workstation Name: DCC1
Source Network Address: ::1
Source Port: 0
Detailed Authentication Information:
Logon Process: seclogo
Authentication Package: Negotiate
Transited Services: -
Package Name (NTLM only): -
Key Length: 0
This event is generated when a logon request fails. It is generated on the computer where access was attempted.
The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe.
The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network).
The Process Information fields indicate which account and process on the system requested the logon.
The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases.
The authentication information fields provide detailed information about this specific logon request.
- Transited services indicate which intermediate services have participated in this logon request.
- Package name indicates which sub-protocol was used among the NTLM protocols.
- Key length indicates the length of the generated session key. This will be 0 if no session key was requested.
Ukwengeza, sizongeza inani Lekheli Lenethiwekhi Yomthombo embhalweni womcimbi.
Bese udinga ukwengeza iskripthi esizovimba ikheli le-IP ku-Windows Firewall. Ngezansi kunesibonelo esingasetshenziselwa lokhu.
Iskripthi sokusetha i-firewall
param(
[Parameter(Mandatory = $true)]
[ValidateNotNullOrEmpty()]
[string]
$SourceAddress
)
$SourceAddress = $SourceAddress.Trim()
$ErrorActionPreference = 'Stop'
$ruleName = 'Quest-InTrust-Block-Failed-Logons'
$ruleDisplayName = 'Quest InTrust: Blocks IP addresses from failed logons'
function Get-BlockedIps {
(Get-NetFirewallRule -Name $ruleName -ErrorAction SilentlyContinue | get-netfirewalladdressfilter).RemoteAddress
}
$blockedIps = Get-BlockedIps
$allIps = [array]$SourceAddress + [array]$blockedIps | Select-Object -Unique | Sort-Object
if (Get-NetFirewallRule -Name $ruleName -ErrorAction SilentlyContinue) {
Set-NetFirewallRule -Name $ruleName -RemoteAddress $allIps
} else {
New-NetFirewallRule -Name $ruleName -DisplayName $ruleDisplayName -Direction Inbound -Action Block -RemoteAddress $allIps
}
Manje ungashintsha igama lomthetho nencazelo ukuze ugweme ukudideka kamuva.
Manje udinga ukungeza lesi skripthi njengesenzo sokuphendula esimisweni, unike amandla isimiso, futhi uqinisekise ukuthi isimiso esihambisanayo sinikwe amandla kunqubomgomo yokuqapha yesikhathi sangempela. I-ejenti kufanele inikwe amandla ukuze iqalise iskripthi sokuphendula futhi kufanele icaciswe ipharamitha elungile.
Ngemuva kokuthi izilungiselelo seziqediwe, inani lokugunyazwa okungaphumelelanga lehle ngo-80%. Inzuzo? Yeka enkulu!
Ngezinye izikhathi ukwanda okuncane kwenzeka futhi, kodwa lokhu kungenxa yokuvela kwemithombo emisha yokuhlasela. Khona-ke yonke into iqala ukwehla futhi.
Phakathi nesonto lomsebenzi, amakheli e-IP angu-66 engeziwe emthethweni we-firewall.
Ngezansi kunethebula elinamagama abasebenzisi angu-10 ajwayelekile asetshenziswe ukuzama ukugunyaza.
igama lomsebenzisi
Inombolo
Ngamaphesenti
umlawuli
1220235
40.78
admin
672109
22.46
umsebenzisi
219870
7.35
i-contoso
126088
4.21
contoso.com
73048
2.44
umlawuli
55319
1.85
Iseva
39403
1.32
sgazlabdc01.contoso.com
32177
1.08
umlawuli
32377
1.08
sgazlabdc01
31259
1.04
Sitshele emazwaneni ukuthi uphendula kanjani ezinsongweni zokuphepha kolwazi. Iyiphi isistimu oyisebenzisayo futhi ilula kangakanani?
Uma ungathanda ukubona i-InTrust isebenza, efomini lempendulo kuwebhusayithi yethu noma ungibhalele umyalezo womuntu siqu.
Funda ezinye izindatshana zethu mayelana nokuphepha kolwazi:
(isihloko esidumile)
Source: www.habr.com