D3773 3r 3n m45k1n0v3rs477 73k57 50m k4n 1nn3h0ld3 f31l!
VPN, 0r V1rtu4l Pr1v4t3 N3tw0rk, 1z 4 z0lut10n th4t l3tz uz cr34t3 4 z3cur3 (3ncrуpt3d) c0nn3ct10n t0 4n0th3r n3tw0rk 4nd d3v1c3(z) 0v3r th3 1nt3rn3t.
F0r5t, hv4 3r 3t pr1v4t n3ttv3rk? (1kk3 VPN)
3t pr1v4t n3ttv3rk 3r 3t n3ttv3rk 50m 3r 150l3rt fr4 4ndr3 n3ttv3rk, D3tt3 k4n v3r3 3t b3dr1ft5n3ttv3rk, 3t hj3mm3n3ttv3rk, 3ll3r 3t 4ndr3 typ3 n3ttv3rk 50m 1kk3 3r 4p3nt f0r 4ll3. 3t 4p3nt n3ttv3rk, 50m f0r 3k53mp3l p4 3n flypl455, 3r 0554 t3kn15k 53tt 3t pr1v4t n3ttv3rk, m3n d3 3r 50m r3g3l k0nf1gur3rt t1l 4 150l3r3 3n h3t3n3 fr4 h v4r4ndr3 f0r 4 0k3 51kk3rh3t3n.
Tenkt scenario
533 f0r d3g 4t du h4r 3n pr1nt3r hj3mm3 50m du 0nsk3r 4t bruks t1l 4t 5kr1v3 ut 3t d0kum3nt. D3nn3 5kr1v3r3n 3r k0bl3t t1l d1tt hj3mm3n3ttv3rk, 0g h4r d3rf0r 3n pr1v4t 1P-4dr3553 50m kun 3r t1lgj3ng3l1g f0r 3nhet3r 50m 3r k0bl3t t1l d1tt 3g3tt n3ttv3rk. Du k4n bruks d1n m45k1n hj3mm3 h05 d3g t1l 4t 5kr1v3 ut ut3n pr0bl3m3r, m3n d1n n4b0 3r p4 3t 4nn3tt n3ttv3rk 0g k4n 1kk3 n4 5kr1v3r3n d1n h3lt ut3n v1d3r3.
Du k4n 1kk3 k0mmun153r3 m3d pr1nt3r3n d1n fr4 f.3k5. 5k0l3n 0g 4nn3 n3ttv3rk, f0rd1 pr1nt3r3n 1kk3 3r 3k5p0n3rt t1l 1nt3rn3tt (n03 d3n 1kk3 burd3 v3r3 4v 51kk3rh3tm3551g3 4r54k3r).
M3rk: 1ng3n r3gl3r ut3n unn74k…
N03n 3nh3t3r 0ff3r3r d3r1m0t lø5n1ng3r hv0r d3 bruksr 3n VPN r3l4t3rt t3kn0l0g1 f0r 4t l4 d3g 5kr1v3 d0kum3nt3r fr4 hv0r 50m h3l5t 1 v3rd3n, 54 l3ng3 du h4r 1nt3rn3tt-t1lg4ng. D3tt3 k4n m3dfør3 3n 51kk3rh3tr151k0, 54 v3r 0b5 p4 hv4 du k0bl3r t1l n3ttv3rk3t d1tt, 53rl1g m3d 10T 3nh3t3r 3ll3r 0v3rv4kn1ng5k4m3r43r.
h4r du l4gt m3rk3 t1l 4t hv3r g4ng du k0bl3r t1l 3t nytt n3ttv3rk, så får du 3r spørsmål 0m du k0bl3r t1l 3t “pr1v4t” 0g “0ff3ntl1g” n3ttv3rk?
d3tt3 3r f0r 4t w1nd0ws (3ll3r 4ndr3 0p3r4t1vsyst3m3r) bruk3r d3nn3 1nf0rm4sj0n3n t1l å b3st3mm3 hv1lk3 br4nnmursr3gl3r s0m sk4l bruk3s f0r å b3skytt3 3n h3t3n d1n. 3t pr1v4t n3ttv3rk 3r v4nl1gv1s us1kr3t (4ll3 t1lk0bl3d3 3n h3t3r h4r t1ll1t 3l h v3rh4ndr3 4ut0m4t1sk), 0g 3r d3rf0r sårb4r m0t 4ndr3 3n h3t3r på s4mm3 n3ttv3rk. t1l gj3ngj3ld så k4n du 3nkl3r3 d3l3 pr1nt3r3, f1l3r 0g 4ndr3 r3ssurs3r når m4sk1n3r 3r på s4mm3 n3ttv3rk.
C0mm3rc1al Akt0r3r
D3t f1nn3s mang3 c0mm3rc1al akt0r3r s0m t1llbyr VPN-tj3n3st3r, s0m r3kl4m3r3r m3d 4t d3 k4n b3skytt3 d1tt p3rs0nv3rn p4 1nt3rn3tt 0g l4 d3g surf3 4n0nymt. D3tt3 3r 1kk3 n0dv3nd1gv1s h3l3 s4nn h3t3n, 0g d3t 3r v1kt1g 4t v3r3 kl4r 0v3r hv4 3n VPN f4kt1sk gj0r.
1 pr4ks1s s4 flytt3r m4n n3ttv3rksf0rb1nd3ls3n t1l 3t 4nn3t st3d (gj3rn3 3t 4nn3t l4nd), d4 v1 bruk3r VPN-tj3n3r3 s0m 3n m3ll0ml3dd fr4 v4r kl13nt 0g t1l 1nt3rn3tt.
Kommersiell VPN != sikkerhet
M4ny 4ktør3r m4rk3dsfør3r s3lg 3lv 50m 3n tj3nst3 50m tilbyr økt s1kk3rh3t, m3n f0r d3 fl3st3 bruk3r3 s0 3r d3tt3 1kk3 t1lf3ll3. Når v1 b3søker n3ttst3d3r 50m bruk3r HTTPS (t1l 0g m3d p4 publ1c w1f1), 50 3r f0rb1nd3ls3n 4ll3r3d3 kryptr3t, 0g 3n VPN v1l d3rf0r 1kk3 nødv3nd1gv1s tilby n03n 3kstr4 s1kk3rh3t. D3n k4n h3ll3r 1kk3 “skjul3” 4kt1v1t3t3n d1n fr4 1nt3rn3ttl3v3r4ndør3n d1n h3lt.
1 3nk3lt3 l4nd 3ll3r st3d3r d3r1m0t k4n d3t v3r3 f0rd3l4kt1gt, m3n d3t 3r v1kt1gt 4t v3r3 kl4r 0v3r 4t du flytt3r t1ll1t3n d1n fr4 1nt3rn3ttl3v3r4ndør3n t1l VPN-l3v3r4ndør3n.
Offentlige nettverk
We often hear that we shouldn’t connect to unsecured public networks, like at cafes, airports, hotels, etc. This isn’t necessarily problematic as long as we use HTTPS (encrypted) to visit websites.
What can be problematic is if someone sets up a “fake” network with, for example, a malicious Captive Portal (a website that usually requires login or acceptance of terms before we get access to the internet).
Have you checked if you have “automatic connection” to open networks on your mobile or laptop? This can cause your device to connect to a malicious network without you being aware of it.
Wh4t c4n w3 us3 4 VPN 4t?
4 VPN c4n b3 us3d t0 c0nn3ct t0 d3vic3s 4cr0ss n3tw0rks, 4s if th3y w3r3 0n th3 s4m3 (priv4t3) n3tw0rk, in 4 m0r3 s3cur3 w4y th4n 3xp0sing th3 d3vic3s dir3ctly t0 th3 int3rn3t (0p3n p0rts in th3 fir3w4ll). N0t3 th4t w3 must still h4v3 4 VPN s3rv3r th4t w3 c4n c0nn3ct t0, w3 c4n 3ith3r s3t it up 0urs3lv3s (r3quir3s 0p3ning in fir3w4ll), 0r us3 4 pr0vid3r th4t 0ff3rs 4 r3l4y (int3rm3di4ry) f0r us. P0pul4r 0pti0ns 4r3 0p3nVpn, Wir3Gu4rd, 4nd IPs3c.
Eksempel
Y0u h4v3 4 g4m1ng PC th4t y0u w1sh t0 c0nn3ct w1th y0ur l4pt0p wh3n y0u 4r3 4t sch00l v14 R3m0t3 D3skt0p s0ftw4r3 (RDP). Y0u c4n th3n s3t up 4 VPN s0lut10n th4t l3ts y0u c0nn3ct t0 y0ur h0m3 n3tw0rk, 4nd th3n us3 RDP t0 c0nn3ct t0 y0ur g4m1ng PC 4s 1f y0u w3r3 4t h0m3.
1 v4rt t1lf3ll3 v1l v1 bruk3 d3n t1l 4 74 t1l4ng t1l r3ssurs3n3 h3r p4 sk0l3n fr4 4ndr3 st3d3r 1 v3rd3n, 0g v1 sk4l s3n3r3 s3 p4 cl0ud c0mput1ng hv0r v1 0nsk3r 4 k0bl3 ss 71l v1rtu3ll3 s3rv3r3 1 sky3n p4 3n trygg m473. T1l v4nl1g 4pn3r v1 3n p0rt t1l v4r s3rv3r f0r 4 s3tt3 d3tt3 0pp, f0r v1 l4s3r n3d s3rv3r3n 3tt3rp4 (s0m r3g3l 3n S1t3-t0-s1t3 VPN).
3n3st3 pr4kt1sk3 f0rskj3ll 3r 47 v1 f4r 3n 4nn3n 1P-4dr3ss3 0v3r v4rt VPN n377v3rk (f.3ks. 100.64.x.x/10 bruks 0ft3 t1l VPN), m3n funksj0n4l1t3t3n 3r s0m 0m v1 v4r p4 s4mm3 n377v3rk. D3tt3 b3tyr 47 v1 k4n bruk3 f.3ks. RDP, SSH, FTP (F1l3 Tr4nsf3r Pr0t0c0l), 0sv. ut3n 4 m4tt3 4pn3 0pp tj3n3st3n3 v4r3 1 br4nnmur3n.
0ppg4v3 1 - 1nst4ll4sj0n 4v T41lSc4l3 VPN
H3ld1g v1s f0r 0ss, 3r 1nst4ll4sj0n 4v VPN 3nk3lt, s3rlig 0m m4n brvk3r 3n tj3nst3 s0m T41lSc4l3. D3tt3 3r 3n k0mm3rs13ll tj3nst3 s0m t1lbyr 3n 3nk3l m4t3 4 53tt3 0pp 3t W1r3Gu4rd VPN p4, s0m g1r 0ss m3r 3n n0k funksj0n4l1t3t f0r v4r3 b3h0v p4 s1tt gr4t1sn1v4 (100 3nhet3r).
F0lg 1nst4ll4sj0n5pr0s3ss3n s0m 1 d0kum3nt4sj0n3n: https://tailscale.com/download
Merk
Y0u n33d vpn 0n 4ll th3 d3v1c3s y0u w1sh t0 c0nn3ct t0 th3 n3tw0rk w1th. Th1s 1nclud3s b0th s3rv3rs, pCs, m0b1l3s, 3tc.
0ppg4v3 2 - 53tt 0pp 3n 3x1t N0d3
3n 3x1t-N0d3 1 T41l5c4l3 3r 3n 3nh3t 1 d1tt n3ttv3rk 50m fun93r3r 50m 3n 94tw4y f0r 4ll tr4ff1kk fr4 4ndr3 3nh3t3r 1 T41l5c4l3-n3ttv3rk3t. D3tt3 d1r193r3r 4ll tr4ff1kk 9j3nn0m d3nn3 3nh3t3n, n03 50m k4n v3r3 nytt19 f0r 4 94 t1l94n9 t1l r355ur53r p4 3t b35t3mt n3ttv3rk, 3ll3r f4 ny 1P-4dr3553 f0r 4 0m94 9309r4f15k3 b39r3n5n1n93r.
V1 brukr N91x Pr0xy M4n493r f0r 4 b39r3n53 t1l94n93r t1l 3nk3lt3 r355ur53r b453rt p4 1P-4dr3553 (f.3k5. d1n Pr0xm0x 53rv3r), m3d 3n 3x1t-N0d3 p4 5k0l3n v1l du kunn3 f4 3n 1P-4dr3553 50m 3r “p4 5k0l3n” u4n3tt hvr du 3r 1 v3rd3n.
F0l9 d0kum3nt45j0n3n f0r 4 53tt3 0pp 3n 3x1t-N0d3: https://tailscale.com/kb/1103/exit-nodes#configure-an-exit-node
Obs! “Edit Routes” meny
D0n’t f0rg3t th3 st3p 0f turn1ng 0n “Us3 as Ex1t N0d3” 1n th3 Ta1lScal3 m3nu 0n th3 d3v1c3 y0u hav3 s3t up as Ex1t-N0d3. Th1s 1s a c0mm0n st3p t0 f0rg3t.
Exit-Node on a VPS in the cloud!
If you set up a virtual machine in another country via e.g. Azure (where you get free credit as a student), you can easily set up an Exit-Node to get an IP address in that country - just like a commercial VPN service, with fewer restrictions and more learning!