diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index 6c4e5fd43a..d04a355cf5 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -1279,6 +1279,7 @@ local extension = {
   srt = 'srt',
   ssa = 'ssa',
   ass = 'ssa',
+  allowed_signers = 'sshallowedsigners',
   st = 'st',
   ipd = 'starlark',
   sky = 'starlark',
@@ -1981,8 +1982,9 @@ local filename = {
   Snakefile = 'snakemake',
   ['.sqlite_history'] = 'sql',
   ['squid.conf'] = 'squid',
-  ['ssh_config'] = 'sshconfig',
-  ['sshd_config'] = 'sshdconfig',
+  allowed_signers = 'sshallowedsigners',
+  ssh_config = 'sshconfig',
+  sshd_config = 'sshdconfig',
   ['/etc/sudoers'] = 'sudoers',
   ['sudoers.tmp'] = 'sudoers',
   ['/etc/sysctl.conf'] = 'sysctl',
@@ -2181,9 +2183,11 @@ local pattern = {
     ['/etc/slp%.conf$'] = 'slpconf',
     ['/etc/slp%.reg$'] = 'slpreg',
     ['/etc/slp%.spi$'] = 'slpspi',
-    ['/etc/sudoers%.d/'] = starsetf('sudoers'),
     ['/etc/ssh/ssh_config%.d/.*%.conf$'] = 'sshconfig',
     ['/etc/ssh/sshd_config%.d/.*%.conf$'] = 'sshdconfig',
+    ['^/etc/ssh/ssh_known_hosts$'] = 'sshknownhosts',
+    ['^/etc/ssh/.+%.pub$'] = 'sshpublickey',
+    ['/etc/sudoers%.d/'] = starsetf('sudoers'),
     ['/etc/sudoers$'] = 'sudoers',
     ['/etc/sysctl%.conf$'] = 'sysctl',
     ['/etc/sysctl%.d/.*%.conf$'] = 'sysctl',
@@ -2543,6 +2547,9 @@ local pattern = {
     ['/%.pinforc$'] = 'pinfo',
     ['^${HOME}/%.xinitrc$'] = 'sh',
     ['^${HOME}/%.xserverrc$'] = 'sh',
+    ['/%.ssh/authorized_keys$'] = 'sshauthorizedkeys',
+    ['/%.ssh/known_hosts$'] = 'sshknownhosts',
+    ['/%.ssh/.+%.pub$'] = 'sshpublickey',
     ['/%.cargo/credentials$'] = 'toml',
     ['/%.init/.*%.override$'] = 'upstart',
     ['/%.kube/kuberc$'] = 'yaml',
diff --git a/runtime/syntax/sshallowedsigners.vim b/runtime/syntax/sshallowedsigners.vim
new file mode 100644
index 0000000000..8392747e8a
--- /dev/null
+++ b/runtime/syntax/sshallowedsigners.vim
@@ -0,0 +1,31 @@
+" Vim syntax file
+" Language:     OpenSSH allowed signers file
+" Author:       Fionn Fitzmaurice (github.com/fionn)
+" Maintainer:   Fionn Fitzmaurice (github.com/fionn)
+" License:      Vim & Apache 2.0
+
+if exists("b:current_syntax")
+    finish
+endif
+
+syn match sshAllowedSignersPrincipal "!\?[a-zA-Z0-9.*?_+-]\+@[a-zA-Z0-9.*?-]\+" nextgroup=sshAllowedSignersPrincipalSeparator,sshAllowedSignersOptions,sshKeyType skipwhite
+syn match sshAllowedSignersPrincipalSeparator "," contained nextgroup=sshAllowedSignersPrincipal
+
+syn region sshAllowedSignersOptions start="[a-z]" end="\s\@=" contains=@sshAllowedSignersOption nextgroup=sshKeyType skipwhite oneline contained
+syn cluster sshAllowedSignersOption contains=sshAllowedSignersOptionKeyword,sshAllowedSignersOptionSeparator,sshAllowedSignersOptionAssignment,sshAllowedSignersOptionValue
+syn keyword sshAllowedSignersOptionKeyword namespaces cert-authority valid-after valid-before contained
+syn match sshAllowedSignersOptionSeparator "," contained
+syn match sshAllowedSignersOptionAssignment "=" contained
+syn match sshAllowedSignersOptionValue '"\(\\\"\|[^"]\)*"' contained
+
+runtime! syntax/sshpublickey.vim
+
+hi def link sshAllowedSignersPrincipal Identifier
+hi def link sshAllowedSignersPrincipalSeparator Punctuation
+
+hi def link sshAllowedSignersOptionKeyword Keyword
+hi def link sshAllowedSignersOptionSeparator Punctuation
+hi def link sshAllowedSignersOptionAssignment Operator
+hi def link sshAllowedSignersOptionValue String
+
+let b:current_syntax = "sshallowedsigners"
diff --git a/runtime/syntax/sshauthorizedkeys.vim b/runtime/syntax/sshauthorizedkeys.vim
new file mode 100644
index 0000000000..cf6b912fbc
--- /dev/null
+++ b/runtime/syntax/sshauthorizedkeys.vim
@@ -0,0 +1,25 @@
+" Vim syntax file
+" Language:     OpenSSH authorized keys file
+" Author:       Fionn Fitzmaurice (github.com/fionn)
+" Maintainer:   Fionn Fitzmaurice (github.com/fionn)
+" License:      Vim & Apache 2.0
+
+if exists("b:current_syntax")
+    finish
+endif
+
+syn region sshAuthorizedKeyOptions start="^[a-z]" end="\s" contains=@sshAuthorizedKeyOption nextgroup=sshKeyType skipwhite oneline
+syn cluster sshAuthorizedKeyOption contains=sshAuthorizedKeyOptionKeyword,sshAuthorizedKeyOptionSeparator,sshAuthorizedKeyOptionAssignment,sshAuthorizedKeyOptionValue
+syn match sshAuthorizedKeyOptionKeyword "[a-z-]\+" contained
+syn match sshAuthorizedKeyOptionSeparator "," contained
+syn match sshAuthorizedKeyOptionAssignment "=" contained
+syn match sshAuthorizedKeyOptionValue '"\(\\\"\|[^"]\)*"' contained
+
+runtime! syntax/sshpublickey.vim
+
+hi def link sshAuthorizedKeyOptionKeyword Keyword
+hi def link sshAuthorizedKeyOptionSeparator Punctuation
+hi def link sshAuthorizedKeyOptionAssignment Operator
+hi def link sshAuthorizedKeyOptionValue String
+
+let b:current_syntax = "sshauthorizedkeys"
diff --git a/runtime/syntax/sshknownhosts.vim b/runtime/syntax/sshknownhosts.vim
new file mode 100644
index 0000000000..5d41deb79b
--- /dev/null
+++ b/runtime/syntax/sshknownhosts.vim
@@ -0,0 +1,27 @@
+" Vim syntax file
+" Language:     OpenSSH known hosts file
+" Author:       Fionn Fitzmaurice (github.com/fionn)
+" Maintainer:   Fionn Fitzmaurice (github.com/fionn)
+" License:      Vim & Apache 2.0
+
+if exists("b:current_syntax")
+    finish
+endif
+
+runtime! syntax/sshpublickey.vim
+
+syn match sshKnownHostsMarker "^@cert-authority\>" nextgroup=sshKnownHostsHostname,sshKnownHostsHashedHostname skipwhite
+syn match sshKnownHostsMarker "^@revoked\>" nextgroup=sshKnownHostsHostname,sshKnownHostsHashedHostname skipwhite
+
+syn match sshKnownHostsHostname "!\?[a-zA-Z0-9.*-]\+" nextgroup=sshKnownHostsHostnameSeparator,sshKeyType skipwhite
+syn match sshKnownHostsHostname "!\?\[[a-zA-Z0-9.*-]\+\]:[0-9]\{1,5}" nextgroup=sshKnownHostsHostnameSeparator,sshKeyType skipwhite
+syn match sshKnownHostsHostnameSeparator "," contained nextgroup=sshKnownHostsHostname
+
+syn match sshKnownHostsHashedHostname "|1|[a-zA-Z0-9/+]\+=\{,2}|[a-zA-Z0-9/+]\+=\{,2}" nextgroup=sshKeyType skipwhite
+
+hi def link sshKnownHostsMarker Statement
+hi def link sshKnownHostsHostname Identifier
+hi def link sshKnownHostsHostnameSeparator Punctuation
+hi def link sshKnownHostsHashedHostname Identifier
+
+let b:current_syntax = "sshknownhosts"
diff --git a/runtime/syntax/sshpublickey.vim b/runtime/syntax/sshpublickey.vim
new file mode 100644
index 0000000000..200378ae0e
--- /dev/null
+++ b/runtime/syntax/sshpublickey.vim
@@ -0,0 +1,30 @@
+" Vim syntax file
+" Language:     OpenSSH public key
+" Author:       Fionn Fitzmaurice (github.com/fionn)
+" Maintainer:   Fionn Fitzmaurice (github.com/fionn)
+" License:      Vim & Apache 2.0
+
+if exists("b:current_syntax")
+    finish
+endif
+
+setlocal iskeyword=_,.,@-@,-,a-z,A-Z,48-57
+
+syn keyword sshKeyType ssh-ed25519 nextgroup=sshKeyBase64Encoded skipwhite
+syn keyword sshKeyType sk-ssh-ed25519@openssh.com nextgroup=sshKeyBase64Encoded skipwhite
+syn keyword sshKeyType ecdsa-sha2-nistp256 nextgroup=sshKeyBase64Encoded skipwhite
+syn keyword sshKeyType ecdsa-sha2-nistp384 nextgroup=sshKeyBase64Encoded skipwhite
+syn keyword sshKeyType ecdsa-sha2-nistp521 nextgroup=sshKeyBase64Encoded skipwhite
+syn keyword sshKeyType sk-ecdsa-sha2-nistp256@openssh.com nextgroup=sshKeyBase64Encoded skipwhite
+syn keyword sshKeyType ssh-rsa nextgroup=sshKeyBase64Encoded skipwhite
+
+syn match sshKeyBase64Encoded "AAAA[a-zA-Z0-9/+]\{64,8000}=\{,2}" contained nextgroup=sshKeyComment
+syn match sshKeyComment ".*$" contained
+
+syn match sshKeyComment "#.*$"
+
+hi def link sshKeyType Type
+hi def link sshKeyBase64Encoded String
+hi def link sshKeyComment Comment
+
+let b:current_syntax = "sshpublickey"
diff --git a/test/old/testdir/test_filetype.vim b/test/old/testdir/test_filetype.vim
index 1bf7bb4df6..37c539c53f 100644
--- a/test/old/testdir/test_filetype.vim
+++ b/test/old/testdir/test_filetype.vim
@@ -789,8 +789,12 @@ func s:GetFilenameChecks() abort
     \ 'srec': ['file.s19', 'file.s28', 'file.s37', 'file.mot', 'file.srec'],
     \ 'srt': ['file.srt'],
     \ 'ssa': ['file.ass', 'file.ssa'],
+    \ 'sshallowedsigners': ['any/allowed_signers', 'any/.allowed_signers', 'any/file.allowed_signers'],
+    \ 'sshauthorizedkeys': ['any/.ssh/authorized_keys'],
     \ 'sshconfig': ['ssh_config', '/.ssh/config', '/etc/ssh/ssh_config.d/file.conf', 'any/etc/ssh/ssh_config.d/file.conf', 'any/.ssh/config', 'any/.ssh/file.conf'],
     \ 'sshdconfig': ['sshd_config', '/etc/ssh/sshd_config.d/file.conf', 'any/etc/ssh/sshd_config.d/file.conf'],
+    \ 'sshpublickey': ['any/.ssh/file.pub', '/etc/ssh/file.pub'],
+    \ 'sshknownhosts': ['any/.ssh/known_hosts', '/etc/ssh/ssh_known_hosts'],
     \ 'st': ['file.st'],
     \ 'starlark': ['file.ipd', 'file.sky', 'file.star', 'file.starlark'],
     \ 'stata': ['file.ado', 'file.do', 'file.imata', 'file.mata'],