{
  "gex": {
    "1024": "EOF",
    "2048": {
      "g": 2,
      "p": 28918173236131694399560733404690583270441510502437890067263745041452466206051601416262214640041414056997343400744608822989440563354298833204318820524316993923012824673862882889753205718923367507820541241961463149985127266872808774931013727398563767306104731753694371198625435860921837370216738338959146757171073349688202704541053145700841609709717556692682745075023384623487652092742435203460057526191524156799083406989509623768988103052773763339723960393859189240510683942420529009858222854774376130351870968696272942773493599012395138482589691504420160241181044878292565899612018280946005300429755955632272928055723
    },
    "3072": {
      "g": 2,
      "p": 5331926118947128382474171339218470136272028949743812866273810130769845587944649527164443960447019380901224823166593219104789224020100732682277024192508428770005404400955238226462915206649129100974725533168434001466888131369517661128864993709156706469423463885766360249724822287253703168571037783954060206226691832299651390221132009666600628341832718942697166975809481827260005363480995667681353122958663383719987458650806739588363475819607843066616981470732676639410352694163552882785602327970686047008704983034348929272014795266356370285953293987627778186695579804414435842781206505691165158688181849163417508528168015723971610256212300261832126552270668730274200749468638986908320614154293341418095008963312387391081542113680133707401962804124996276119272546608231349198380134752429250522553339679162036956321370898723039130008923182422345548434079002690665048778315626680889581957770500675946768338658394766620298343551283
    },
    "4096": {
      "g": 2,
      "p": 905668588257138461502444383173469830441764137826432624658390582112743371338987182721991496155561363723932596419569592440899004154378348928678342061987052853572663246994895141721493479160503339408839516832359777895531216354123191737393789439450079214945121833438498373666950166799461630634102563811828444435480327582711313237518729509662701026542044852263284278446985785763343076261582251826018143733485312637020759707263044381051021145778117110416792521442121797032145917021144123389578319779786453431959546034567065245958845132400720972464323355602563428614902808947134839990179433468319344696857468761955363983710940346959005067157195151549299684588259397099453208362550838396423248038744080613104024952813141401979690631469743564105153385223804966185736167843259516117672919802526525993825075790584206469586393389301768957288809459784105613855815204612604417084336412720932111681430217103437372296088094800986953443835288223348009706103801928518685267269083316742713633188168198838213618492214842753325406699448676872511486147495222228885197807511010159342446193503102150762479354942034256130863328595532054744976662789864674913514530148069134433999110926851823465959555160852306906293202885516188268989213022355138378206198000139
    },
    "6144": {
      "g": 2,
      "p": 32684863935739042993282041081208397858732619410285057635061044759053180585882023363511929716236033191733208559920619148313793238323321173038416942749240202269514054959824825894747146189455672534426219593321079651415709695524154691124522240873358194997865674358384541562603412366896780361500687768153231354583710117615145243668088745599132548617103077535646158824950961686149471989775033206169223719536465728687083500677916316341042867477965342197887579171197120859585659542964421521888089205452251479003001083515321047796053017943213755173067309111402035266698450959909243894317051156587484805379850391117036492095495198429875921907739783807687031475746197516161899866953235379376084315853212781369934032916167523866321907526658276804080824558143011391285213109379040148654974935331691032663663722156649786665123302185091694849563726971908184795889175853522558577891184315328582897242733553288749684447092267485971875915253324295759543144539560731461747590263188925221554868126090533791177702149468554307055624449930792968111751985711417861500126451857441222904270264290608366515337358281459138048118696133894853077749756774512153245124264574146839250863336693934310679039927884589054946022462662435693853402218263189106295933232781004029675408558861192763549297168998653918062556428817982565149669539115580735163715750539556546514816037108014353580093246078335016936728290461609440535322560859524090615183740507289565228422640379610477125317504724510637374802254606287934257265119476392313352176131075906176176112226445371439452158387624591139982772569905652981445351455065357684188931526912513831022757515655004428486132780132419852235469348014273603025491686210503077630480818620767643429474493736752520787540200949597255352791136594113482649528179955164403089331584191408192192516999849959079844875172930871812481579327813927073468567509131819139
    },
    "768": "EOF",
    "8192": {
      "g": 2,
      "p": 859583498601814451609456090126549677928278505347242531638935950064221654420310824288669424053767598449615485831817864983513850061660677714022857456684654237245275866076589264881103902147160075921968319400521606265780943322020127701475728787190783712574459877592339500532519338692001574870645733546660217634858453345380355431593257550945504659266729044053043683616236117360429539203080762594011094807969728723800541593153229340379228319417306356656826550164178771331223422972601178936754506392114110328000421249830825152333232307608225440576187102461440179328149280782626153900500922521994251264180666392856377526216054521862317812957653151287978612494745647058053436070469524300894348486895021875716901632387952959107145490216623520749918594869066951707123177188561847320157271034125947968740092829851081042441191570962416269828765859325497492016667322601962609929179676530583119300174084085536403902032163213159076341751007979303872698764028232033680609422152518777882520366885431608042862429811680321734613676833864200185546089784432457300155826510406687732916280119476703023873675564507204778585440651663847894667211081773849011761448449513491818578461700743019872651154955950141858878268432099223213805390969613090161432968261682413829430969940458405859134901604516683210127152863831168239675866548600025761094907133092096660120633528527602574051254861574067490453352170796568126306145349990099900495727285622197905520936826383870143604196009442639062124137169698301903922537344024257078630123701984519246671167987904522401117723413864865154417460986848114812470397684821432802109995666305984807744534191451263201565948128230815280496707291475492427684849967587801855459475405823489968923113081615704588562950221675594376750307688182539566203254614862154600630446993795280013813398002623365182727235626989179345452808270485495689697914836926953844959026822608509808424110224784309364964636953843084670808320620779471340461356653671932328747513702792261976345336625104003195883216084853849476260112586446508263824158886572583745264979062021637943840235530168039191530636937318721676039656887256041138836476255626601860401842408928038660481125957117533821615674163724015181212784133982434309028568849361227777267730844807244752608767873264507182115117405080042857683071525782865060454917603495266666926998799996919567390308953114427019774066398924799851755089861259479383306063115715097499363265310391940611919469299409214377833388098652248278224283283878924269179
    }
  },
  "host_keys": {
    "ssh-ed25519": {
      "algorithm": "ssh-ed25519",
      "ascii": "AAAAC3NzaC1lZDI1NTE5AAAAIDN6ShoSJQVe0b7D9H3A9UVjdo9tqnG8WWZjbzkRl2BE",
      "fingerprint": "2b:43:e5:2a:a8:1c:b3:5d:28:de:b5:63:45:e2:1f:4d",
      "n": 23284022051748675339955571024507585233098002640948159196111733524196989820996
    }
  },
  "ident": "SSH-2.0-OpenSSH_8.4p1 Debian-2~bpo10+1",
  "ip": "104.248.248.192",
  "supported": {
    "compression_algorithms_client_to_server": [
      "none"
    ],
    "compression_algorithms_server_to_client": [
      "none"
    ],
    "encryption_algorithms_client_to_server": [
      "aes256-ctr",
      "aes256-gcm@openssh.com",
      "aes192-ctr",
      "chacha20-poly1305@openssh.com"
    ],
    "encryption_algorithms_server_to_client": [
      "aes256-ctr",
      "aes256-gcm@openssh.com",
      "aes192-ctr",
      "chacha20-poly1305@openssh.com"
    ],
    "kex_algorithms": [
      "diffie-hellman-group-exchange-sha256",
      "curve25519-sha256@libssh.org",
      "diffie-hellman-group1-sha1"
    ],
    "languages_client_to_server": [
      ""
    ],
    "languages_server_to_client": [
      ""
    ],
    "mac_algorithms_client_to_server": [
      "umac-128-etm@openssh.com",
      "hmac-sha2-256-etm@openssh.com",
      "hmac-sha2-512-etm@openssh.com",
      "hmac-sha2-512",
      "hmac-sha2-256"
    ],
    "mac_algorithms_server_to_client": [
      "umac-128-etm@openssh.com",
      "hmac-sha2-256-etm@openssh.com",
      "hmac-sha2-512-etm@openssh.com",
      "hmac-sha2-512",
      "hmac-sha2-256"
    ],
    "server_host_key_algorithms": [
      "ssh-ed25519"
    ]
  }
}

SSH Report for msebera.cz

Score: F

Server Parameters

Server version SSH-2.0-OpenSSH_8.4p1 Debian-2~bpo10+1
Compression none

Host Keys

ssh-ed25519 Generally considered secure a
2b:43:e5:2a:a8:1c:b3:5d:28:de:b5:63:45:e2:1f:4d
AAAAC3NzaC1lZDI1NTE5AAAAIDN6ShoSJQVe0b7D9H3A9UVjdo9tqnG8WWZjbzkR
l2BE
a

Key Exchange

diffie-hellman-group-exchange-sha256 Generally considered secure a
768 bit request Server refused the request

              
0
1024 bit request Server refused the request

              
0
2048 bit request 2048-bit group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3072 bit request 3072-bit group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4096 bit request 4096-bit group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6144 bit request 6144-bit group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8192 bit request 8192-bit group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curve25519-sha256@libssh.org Generally considered secure a
diffie-hellman-group1-sha1 SHA1 is broken. DH group1 is broken f

Message Authentication

umac-128-etm@openssh.com Generally considered secure a
hmac-sha2-256-etm@openssh.com Generally considered secure a
hmac-sha2-512-etm@openssh.com Generally considered secure a
hmac-sha2-512 Generally considered secure a
hmac-sha2-256 Generally considered secure a

Encryption

aes256-ctr Generally considered secure a
aes256-gcm@openssh.com Generally considered secure a
aes192-ctr Generally considered secure a
chacha20-poly1305@openssh.com Possibly affected by Terrapin MITM d