<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-10-01</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001088454</issuerCik><issuerName>NETSCREEN TECHNOLOGIES INC</issuerName>        <issuerTradingSymbol>NSCN</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001250321</rptOwnerCik><rptOwnerName>FLYNN DAVID</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>805 11TH AVENUE</rptOwnerStreet1><rptOwnerStreet2>BUILDING 3</rptOwnerStreet2><rptOwnerCity>SUNNYVALE</rptOwnerCity><rptOwnerState>CA</rptOwnerState><rptOwnerZipCode>94089</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VP of Marketing</officerTitle></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Employee Stock Option (Right to buy)</value></securityTitle><conversionOrExercisePrice><value>23</value></conversionOrExercisePrice><transactionDate><value>2003-10-01</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>60000</value></transactionShares><transactionPricePerShare><value>0</value><footnoteId id="F2" /></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-10-01</value><footnoteId id="F1" /></exerciseDate><expirationDate><value>2008-09-30</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>60000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>60000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">25% of the shares initially subject to the option vest on October 1, 2004 and 2.08333% of the shares initially subject to the option vest on a monthly basis thereafter.</footnote><footnote id="F2">Column 8 is a not a required reportable field.  Use zeros per SEC.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>/s/ Tom Tovar, Attorney-in-Fact for David Flynn</signatureName><signatureDate>2003-10-09</signatureDate></ownerSignature></ownershipDocument>

