add trusted proxy for parsing client IPs (#115)

cmd/gotosocial/generalflags.go

@@ -68,5 +68,11 @@ func generalFlags(flagNames, envNames config.Flags, defaults config.Defaults) []
 			Value:   defaults.Port,
 			EnvVars: []string{envNames.Port},
 		},
+		&cli.StringSliceFlag{
+			Name:    flagNames.TrustedProxies,
+			Usage:   "Proxies to trust when parsing x-forwarded headers into real IPs.",
+			Value:   cli.NewStringSlice(defaults.TrustedProxies...),
+			EnvVars: []string{envNames.TrustedProxies},
+		},
 	}
 }

example/config.yaml

@@ -64,6 +64,14 @@ protocol: "https"
 # Default: 8080
 port: 8080
 
+# Array of string. CIDRs or IP addresses of proxies that should be trusted when determining real client IP from behind a reverse proxy.
+# If you're running inside a Docker container behind Traefik or Nginx, for example, add the subnet of your docker network,
+# or the gateway of the docker network, and/or the address of the reverse proxy (if it's not running on the host network).
+# Example: ["127.0.0.1/32", "172.20.0.1"]
+# Default: ["127.0.0.1/32"] (localhost)
+trustedProxies:
+  - "127.0.0.1/32"
+
 ############################
 ##### DATABASE CONFIG ######
 ############################

go.mod

@@ -5,9 +5,9 @@ go 1.16
 require (
 	github.com/buckket/go-blurhash v1.1.0
 	github.com/coreos/go-oidc/v3 v3.0.0
-	github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.1 // indirect
-	github.com/dsoprea/go-exif v0.0.0-20210512055020-8213cfabc61b // indirect
+	github.com/dsoprea/go-exif v0.0.0-20210625224831-a6301f85c82b // indirect
-	github.com/dsoprea/go-exif/v2 v2.0.0-20210512055020-8213cfabc61b // indirect
+	github.com/dsoprea/go-exif/v2 v2.0.0-20210625224831-a6301f85c82b // indirect
 	github.com/dsoprea/go-iptc v0.0.0-20200610044640-bc9ca208b413 // indirect
 	github.com/dsoprea/go-jpeg-image-structure v0.0.0-20210512043942-b434301c6836 // indirect
 	github.com/dsoprea/go-logging v0.0.0-20200710184922-b02d349568dd // indirect
@@ -16,16 +16,16 @@ require (
 	github.com/dsoprea/go-utility v0.0.0-20200717064901-2fccff4aa15e // indirect
 	github.com/gin-contrib/cors v1.3.1
 	github.com/gin-contrib/sessions v0.0.3
-	github.com/gin-gonic/gin v1.7.2
+	github.com/gin-gonic/gin v1.7.2-0.20210722225815-d4ca9a0fb121
 	github.com/go-errors/errors v1.4.0 // indirect
 	github.com/go-fed/activity v1.0.1-0.20210426194615-e0de0863dcc1
 	github.com/go-fed/httpsig v1.1.0
 	github.com/go-pg/pg/extra/pgdebug v0.2.0
-	github.com/go-pg/pg/v10 v10.9.3
+	github.com/go-pg/pg/v10 v10.10.3
-	github.com/go-playground/validator/v10 v10.6.1 // indirect
+	github.com/go-playground/validator/v10 v10.7.0 // indirect
 	github.com/golang/geo v0.0.0-20210211234256-740aa86cb551 // indirect
-	github.com/golang/mock v1.5.0 // indirect
+	github.com/golang/mock v1.6.0 // indirect
-	github.com/google/uuid v1.2.0
+	github.com/google/uuid v1.3.0
 	github.com/gorilla/sessions v1.2.1 // indirect
 	github.com/gorilla/websocket v1.4.2
 	github.com/h2non/filetype v1.1.1
@@ -37,7 +37,7 @@ require (
 	github.com/modern-go/reflect2 v1.0.1 // indirect
 	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
 	github.com/oklog/ulid v1.3.1
-	github.com/onsi/gomega v1.13.0 // indirect
+	github.com/onsi/gomega v1.14.0 // indirect
 	github.com/quasoft/memstore v0.0.0-20191010062613-2bce066d2b0b // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/sirupsen/logrus v1.8.1
@@ -45,14 +45,15 @@ require (
 	github.com/superseriousbusiness/exifremove v0.0.0-20210330092427-6acd27eac203
 	github.com/superseriousbusiness/oauth2/v4 v4.3.0-SSB
 	github.com/tidwall/btree v0.5.0 // indirect
-	github.com/tidwall/buntdb v1.2.3 // indirect
+	github.com/tidwall/buntdb v1.2.4 // indirect
 	github.com/ugorji/go v1.2.6 // indirect
 	github.com/urfave/cli/v2 v2.3.0
 	github.com/vmihailenco/msgpack/v5 v5.3.4 // indirect
 	github.com/wagslane/go-password-validator v0.3.0
-	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a
+	go.opentelemetry.io/otel v0.20.0 // indirect
-	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
+	golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97
-	golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea // indirect
+	golang.org/x/oauth2 v0.0.0-20210628180205-a41e5a781914
+	golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c // indirect
 	golang.org/x/text v0.3.6
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/yaml.v2 v2.4.0

go.sum

@@ -1,6 +1,38 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
+cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
+cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
+cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
+cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
+cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/ajg/form v1.5.1 h1:t9c7v8JUKu/XxOGBU0yjNpaMloxGEJhUkqFRq0ibGeU=
 github.com/ajg/form v1.5.1/go.mod h1:uL1WgH+h2mgNtvBq0339dVnzXdBETtL2LeUXaIv25UY=
 github.com/andybalholm/brotli v1.0.0 h1:7UCwP93aiSfvWpapti8g88vVVGp2qqtGyePsSuDafo4=
@@ -14,12 +46,18 @@ github.com/bradleypeabody/gorilla-sessions-memcache v0.0.0-20181103040241-659414
 github.com/buckket/go-blurhash v1.1.0 h1:X5M6r0LIvwdvKiUtiNcRL2YlmOfMzYobI3VCKCZc9Do=
 github.com/buckket/go-blurhash v1.1.0/go.mod h1:aT2iqo5W9vu9GpyoLErKfTHwgODsZp3bQfXjXJUxNb8=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/coreos/go-oidc/v3 v3.0.0 h1:/mAA0XMgYJw2Uqm7WKGCsKnjitE/+A0FFbOmiRJm7LQ=
 github.com/coreos/go-oidc/v3 v3.0.0/go.mod h1:rEJ/idjfUyfkBit1eI1fvyr+64/g9dcKpAm8MJMesvo=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/cpuguy83/go-md2man/v2 v2.0.0 h1:EoUDS0afbrsXAZ9YQ9jdu/mZ2sXgT1/2yyNng4PGlyM=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/cpuguy83/go-md2man/v2 v2.0.1 h1:r/myEWzV9lfsM1tFLgDyu0atFtJ1fXn261LKYj/3DxU=
+github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/dave/jennifer v1.3.0/go.mod h1:fIb+770HOpJ2fmN9EPPKOqm1vMGhB+TwXKMZhrIygKg=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -29,10 +67,14 @@ github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZm
 github.com/dsoprea/go-exif v0.0.0-20210131231135-d154f10435cc/go.mod h1:lOaOt7+UEppOgyvRy749v3do836U/hw0YVJNjoyPaEs=
 github.com/dsoprea/go-exif v0.0.0-20210512055020-8213cfabc61b h1:NSYszMk5S88hDGF0benZ9PolrCffN7Ojx0zFdWgStB4=
 github.com/dsoprea/go-exif v0.0.0-20210512055020-8213cfabc61b/go.mod h1:lOaOt7+UEppOgyvRy749v3do836U/hw0YVJNjoyPaEs=
+github.com/dsoprea/go-exif v0.0.0-20210625224831-a6301f85c82b h1:hoVHc4m/v8Al8mbWyvKJWr4Z37yM4QUSVh/NY6A5Sbc=
+github.com/dsoprea/go-exif v0.0.0-20210625224831-a6301f85c82b/go.mod h1:lOaOt7+UEppOgyvRy749v3do836U/hw0YVJNjoyPaEs=
 github.com/dsoprea/go-exif/v2 v2.0.0-20200321225314-640175a69fe4/go.mod h1:Lm2lMM2zx8p4a34ZemkaUV95AnMl4ZvLbCUbwOvLC2E=
 github.com/dsoprea/go-exif/v2 v2.0.0-20200604193436-ca8584a0e1c4/go.mod h1:9EXlPeHfblFFnwu5UOqmP2eoZfJyAZ2Ri/Vki33ajO0=
 github.com/dsoprea/go-exif/v2 v2.0.0-20210512055020-8213cfabc61b h1:C0NJXglXQIT4SC7AItpV+RU36X98c46kZTVmDAVaBR8=
 github.com/dsoprea/go-exif/v2 v2.0.0-20210512055020-8213cfabc61b/go.mod h1:oKrjk2kb3rAR5NbtSTLUMvMSbc+k8ZosI3MaVH47noc=
+github.com/dsoprea/go-exif/v2 v2.0.0-20210625224831-a6301f85c82b h1:8lVRnnni9zebcpjkrEXrEyxFpRWG/oTpWc2Y3giKomE=
+github.com/dsoprea/go-exif/v2 v2.0.0-20210625224831-a6301f85c82b/go.mod h1:oKrjk2kb3rAR5NbtSTLUMvMSbc+k8ZosI3MaVH47noc=
 github.com/dsoprea/go-exif/v3 v3.0.0-20200717053412-08f1b6708903/go.mod h1:0nsO1ce0mh5czxGeLo4+OCZ/C6Eo6ZlMWsz7rH/Gxv8=
 github.com/dsoprea/go-exif/v3 v3.0.0-20210512043655-120bcdb2a55e/go.mod h1:cg5SNYKHMmzxsr9X6ZeLh/nfBRHHp5PngtEPcujONtk=
 github.com/dsoprea/go-iptc v0.0.0-20200609062250-162ae6b44feb/go.mod h1:kYIdx9N9NaOyD7U6D+YtExN7QhRm+5kq7//yOsRXQtM=
@@ -56,7 +98,9 @@ github.com/dsoprea/go-utility v0.0.0-20200711062821-fab8125e9bdf/go.mod h1:95+K3
 github.com/dsoprea/go-utility v0.0.0-20200717064901-2fccff4aa15e h1:ojqYA1mU6LuRm8XzrVOvyfb000y59cbUcu6Wt8sFSAs=
 github.com/dsoprea/go-utility v0.0.0-20200717064901-2fccff4aa15e/go.mod h1:KVK+/Hul09ujXAGq+42UBgCTnXkiJZRnLYdURGjQUwo=
 github.com/dsoprea/go-utility/v2 v2.0.0-20200717064901-2fccff4aa15e/go.mod h1:uAzdkPTub5Y9yQwXe8W4m2XuP0tK4a9Q/dantD0+uaU=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fasthttp-contrib/websocket v0.0.0-20160511215533-1f3b11f56072/go.mod h1:duJ4Jxv5lDcvg4QuQr0oowTf7dz4/CR8NtyCooz9HL8=
 github.com/fatih/structs v1.1.0 h1:Q7juDM0QtcnhCpeyLGQKyg4TOIghuNXrkL32pHAUMxo=
@@ -73,6 +117,10 @@ github.com/gin-contrib/sessions v0.0.3/go.mod h1:8C/J6cad3Il1mWYYgtw0w+hqasmpvy2
 github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
 github.com/gin-gonic/gin v1.5.0/go.mod h1:Nd6IXA8m5kNZdNEHMBd93KT+mdY3+bewLgRvmCsR2Do=
+github.com/gin-gonic/gin v1.7.2-0.20210713014419-caf280259327 h1:EmfUwtxCHkFWFqW5k1/WOhzA551SnPPIzIq5/dpeZFg=
+github.com/gin-gonic/gin v1.7.2-0.20210713014419-caf280259327/go.mod h1:0rdnKJhj+oP5aTsm5iFhKbQaPXBz4q/pWndcoMneALE=
+github.com/gin-gonic/gin v1.7.2-0.20210722225815-d4ca9a0fb121 h1:g8dxLBXSWxnEVZ+YqpDw30A4+bfscDZrqqS+JSt7dsY=
+github.com/gin-gonic/gin v1.7.2-0.20210722225815-d4ca9a0fb121/go.mod h1:0rdnKJhj+oP5aTsm5iFhKbQaPXBz4q/pWndcoMneALE=
 github.com/gin-gonic/gin v1.7.2 h1:Tg03T9yM2xa8j6I3Z3oqLaQRSmKvxPd6g/2HJ6zICFA=
 github.com/gin-gonic/gin v1.7.2/go.mod h1:jD2toBW3GZUr5UMcdrwQA10I7RuaFOl/SGeDjXkfUtY=
 github.com/globalsign/mgo v0.0.0-20181015135952-eeefdecb41b8/go.mod h1:xkRDCp4j0OGD1HRkm4kmhM+pmpv3AKq5SU7GMg4oO/Q=
@@ -86,11 +134,16 @@ github.com/go-fed/activity v1.0.1-0.20210426194615-e0de0863dcc1/go.mod h1:v4QoPa
 github.com/go-fed/httpsig v0.1.1-0.20190914113940-c2de3672e5b5/go.mod h1:T56HUNYZUQ1AGUzhAYPugZfp36sKApVnGBgKlIY+aIE=
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@@ -104,25 +157,40 @@ github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+
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@@ -135,20 +203,38 @@ github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaS
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@@ -165,7 +251,10 @@ github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0U
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@@ -175,10 +264,13 @@ github.com/json-iterator/go v1.1.7/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/u
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@@ -222,17 +314,21 @@ github.com/onsi/ginkgo v1.13.0/go.mod h1:+REjRxOmWfHCjfv9TTWB1jD1Frx4XydAD3zm1ls
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 github.com/quasoft/memstore v0.0.0-20191010062613-2bce066d2b0b/go.mod h1:wTPjTepVu7uJBYgZ0SdWHQlIas582j6cn2jgk4DDdlg=
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 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
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 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
@@ -246,6 +342,7 @@ github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykE
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
 github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
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+github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
@@ -265,13 +362,19 @@ github.com/tidwall/btree v0.5.0/go.mod h1:TzIRzen6yHbibdSfK6t8QimqbUnoxUSrZfeW7U
 github.com/tidwall/buntdb v1.1.2/go.mod h1:xAzi36Hir4FarpSHyfuZ6JzPJdjRZ8QlLZSntE2mqlI=
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 github.com/tidwall/gjson v1.3.4/go.mod h1:P256ACg0Mn+j1RXIDXoss50DeIABTYK1PULOJHhxOls=
 github.com/tidwall/gjson v1.6.0/go.mod h1:P256ACg0Mn+j1RXIDXoss50DeIABTYK1PULOJHhxOls=
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 github.com/tidwall/grect v0.0.0-20161006141115-ba9a043346eb/go.mod h1:lKYYLFIr9OIgdgrtgkZ9zgRxRdvPYsExnYBsEAd8W5M=
 github.com/tidwall/grect v0.1.1 h1:+kMEkxhoqB7rniVXzMEIA66XwU07STgINqxh+qVIndY=
 github.com/tidwall/grect v0.1.1/go.mod h1:CzvbGiFbWUwiJ1JohXLb28McpyBsI00TK9Y6pDWLGRQ=
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 github.com/tidwall/lotsa v1.0.2/go.mod h1:X6NiU+4yHA3fE3Puvpnn1XMDrFZrE9JO2/w+UMuqgR8=
 github.com/tidwall/match v1.0.1/go.mod h1:LujAq0jyVjBy028G1WhWfIzbpQfMO8bBZ6Tyb0+pL9E=
 github.com/tidwall/match v1.0.3 h1:FQUVvBImDutD8wJLN6c5eMzWtjgONK9MwIBCOrUJKeE=
@@ -328,7 +431,16 @@ github.com/yudai/gojsondiff v1.0.0/go.mod h1:AY32+k2cwILAkW1fbgxQ5mUmMiZFgLIV+FB
 github.com/yudai/golcs v0.0.0-20170316035057-ecda9a501e82 h1:BHyfKlQyqbsFN5p3IfnEUduWvb9is428/nNb5L3U01M=
 github.com/yudai/golcs v0.0.0-20170316035057-ecda9a501e82/go.mod h1:lgjkn3NuSvDfVJdfcVVdX+jpBxNmX4rDAzaS45IcYoM=
 github.com/yudai/pp v2.0.1+incompatible/go.mod h1:PuxR/8QJ7cyCkFp/aUDS+JY727OFEZkTdatxwunjIkc=
+github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
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 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
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+go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
+go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
+go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opentelemetry.io/otel v0.13.0/go.mod h1:dlSNewoRYikTkotEnxdmuBHgzT+k/idJSfDv/FxEnOY=
 go.opentelemetry.io/otel v0.20.0 h1:eaP0Fqu7SXHwvjiqDq83zImeehOHX8doTvU9AwXON8g=
 go.opentelemetry.io/otel v0.20.0/go.mod h1:Y3ugLH2oa81t5QO+Lty+zXf8zC9L26ax4Nzoxm/dooo=
@@ -341,17 +453,47 @@ go.opentelemetry.io/otel/trace v0.20.0/go.mod h1:6GjCW8zgDjwGHGa6GkyeB8+/5vjT16g
 golang.org/x/crypto v0.0.0-20180527072434-ab813273cd59/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
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 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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@@ -359,87 +501,228 @@ golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73r
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@@ -448,6 +731,7 @@ google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzi
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+honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 mellium.im/sasl v0.2.1 h1:nspKSRg7/SyO0cRGY71OkfHab8tf9kCts6a6oTDut0w=
 mellium.im/sasl v0.2.1/go.mod h1:ROaEDLQNuf9vjKqE1SrAfnsobm2YKXT1gnN1uDp1PjQ=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

internal/config/config.go

@@ -51,6 +51,7 @@ type Config struct {
 	AccountDomain     string             `yaml:"accountDomain"`
 	Protocol          string             `yaml:"protocol"`
 	Port              int                `yaml:"port"`
+	TrustedProxies    []string           `yaml:"trustedProxies"`
 	DBConfig          *DBConfig          `yaml:"db"`
 	TemplateConfig    *TemplateConfig    `yaml:"template"`
 	AccountsConfig    *AccountsConfig    `yaml:"accounts"`
@@ -155,6 +156,10 @@ func (c *Config) ParseCLIFlags(f KeyedFlags, version string) error {
 		c.Port = f.Int(fn.Port)
 	}
 
+	if len(c.TrustedProxies) == 0 || f.IsSet(fn.TrustedProxies) {
+		c.TrustedProxies = f.StringSlice(fn.TrustedProxies)
+	}
+
 	// db flags
 	if c.DBConfig.Type == "" || f.IsSet(fn.DbType) {
 		c.DBConfig.Type = f.String(fn.DbType)
@@ -339,6 +344,7 @@ type Flags struct {
 	AccountDomain   string
 	Protocol        string
 	Port            string
+	TrustedProxies  string
 
 	DbType      string
 	DbAddress   string
@@ -396,6 +402,7 @@ type Defaults struct {
 	AccountDomain   string
 	Protocol        string
 	Port            int
+	TrustedProxies  []string
 	SoftwareVersion string
 
 	DbType      string
@@ -456,6 +463,7 @@ func GetFlagNames() Flags {
 		AccountDomain:   "account-domain",
 		Protocol:        "protocol",
 		Port:            "port",
+		TrustedProxies:  "trusted-proxies",
 
 		DbType:      "db-type",
 		DbAddress:   "db-address",
@@ -516,6 +524,7 @@ func GetEnvNames() Flags {
 		AccountDomain:   "GTS_ACCOUNT_DOMAIN",
 		Protocol:        "GTS_PROTOCOL",
 		Port:            "GTS_PORT",
+		TrustedProxies:  "GTS_TRUSTED_PROXIES",
 
 		DbType:      "GTS_DB_TYPE",
 		DbAddress:   "GTS_DB_ADDRESS",

internal/config/default.go

@@ -11,6 +11,7 @@ func TestDefault() *Config {
 		Host:            defaults.Host,
 		Protocol:        defaults.Protocol,
 		Port:            defaults.Port,
+		TrustedProxies:  defaults.TrustedProxies,
 		SoftwareVersion: defaults.SoftwareVersion,
 		DBConfig: &DBConfig{
 			Type:            defaults.DbType,
@@ -77,6 +78,7 @@ func Default() *Config {
 		Host:            defaults.Host,
 		Protocol:        defaults.Protocol,
 		Port:            defaults.Port,
+		TrustedProxies:  defaults.TrustedProxies,
 		SoftwareVersion: defaults.SoftwareVersion,
 		DBConfig: &DBConfig{
 			Type:            defaults.DbType,
@@ -145,6 +147,7 @@ func GetDefaults() Defaults {
 		AccountDomain:   "",
 		Protocol:        "https",
 		Port:            8080,
+		TrustedProxies:  []string{"127.0.0.1/32"}, // localhost
 
 		DbType:      "postgres",
 		DbAddress:   "localhost",
@@ -204,6 +207,7 @@ func GetTestDefaults() Defaults {
 		AccountDomain:   "",
 		Protocol:        "http",
 		Port:            8080,
+		TrustedProxies:  []string{"127.0.0.1/32"},
 
 		DbType:     "postgres",
 		DbAddress:  "localhost",

internal/router/router.go

@@ -122,6 +122,11 @@ func New(cfg *config.Config, db db.DB, logger *logrus.Logger) (Router, error) {
 	engine := gin.Default()
 	engine.MaxMultipartMemory = 8 << 20 // 8 MiB
 
+	// set up IP forwarding via x-forward-* headers.
+	if err := engine.SetTrustedProxies(cfg.TrustedProxies); err != nil {
+		return nil, err
+	}
+
 	// enable cors on the engine
 	if err := useCors(cfg, engine); err != nil {
 		return nil, err