Is an IPsec IKE PSK (aggressive mode) hash reversible?

No. IPsec IKE PSK (aggressive mode) is a one-way hash; you cannot reverse it. You can only guess inputs and compare, which is what hashcat and John do.

What is the hashcat mode for IPsec IKE PSK (aggressive mode)?

Use `-m 5300` to tell hashcat to treat the input as IPsec IKE PSK (aggressive mode).

How long does it take to crack IPsec IKE PSK (aggressive mode)?

IPsec IKE PSK (aggressive mode) is fast to compute, so weak passwords often fall in seconds to minutes on a GPU; strong, long passwords remain infeasible.

Is an IPsec IKE PSK (aggressive mode) hash reversible?

No. IPsec IKE PSK (aggressive mode) is a one-way hash; you cannot reverse it. You can only guess inputs and compare, which is what hashcat and John do.

What is the hashcat mode for IPsec IKE PSK (aggressive mode)?

Use `-m 5300` to tell hashcat to treat the input as IPsec IKE PSK (aggressive mode).

How long does it take to crack IPsec IKE PSK (aggressive mode)?

IPsec IKE PSK (aggressive mode) is fast to compute, so weak passwords often fall in seconds to minutes on a GPU; strong, long passwords remain infeasible.

How to identify and crack an IPsec IKE PSK (aggressive mode) hash

IPsec IKE PSK (aggressive mode) is an network authentication hash type. It is fast and typically unsalted, which makes weak passwords recoverable quickly on consumer GPU hardware. This page shows how to recognise it and the exact commands to attack it.

All identification runs locally in WebAssembly. The commands below write the hash to a local file on your machine — nothing is sent to this site.

Identifying the hash

The hash identifier on the home page detects IPsec IKE PSK (aggressive mode) entirely in your browser — your hash is never uploaded. A typical example looks like this:

991a560a103a8e07cbd3:5c7a...:8f3b...:01ff...:cafe...:dead...:beef...:1234:64c4ee0a3a

Cracking IPsec IKE PSK (aggressive mode) with hashcat

Save the hash to a file and run hashcat in mode -m 5300. Start with a wordlist such as rockyou.txt:

echo '991a560a103a8e07cbd3:5c7a...:8f3b...:01ff...:cafe...:dead...:beef...:1234:64c4ee0a3a' > hash.txt && hashcat -m 5300 hash.txt /usr/share/wordlists/rockyou.txt

Add a rule set to mutate dictionary words (capitalisation, leetspeak, appended digits) and dramatically widen coverage:

echo '991a560a103a8e07cbd3:5c7a...:8f3b...:01ff...:cafe...:dead...:beef...:1234:64c4ee0a3a' > hash.txt && hashcat -m 5300 hash.txt /usr/share/wordlists/rockyou.txt -r /usr/share/hashcat/rules/best64.rule