Dotaz: Propojeni ruznych wireguard siti

[Tom]

Zdravim,

snazim se propojit 2 site v ruznych lokacich pomoci Wireguard VPN a k tomu jeste dalsi Wireguard RoadWarriory.

Na obou lokacich (rikejme jim A a B) je na routerech Opnsense s Wireguard pluginem, oba jsou propojeny Site2site svoji instanci wireguardu. To funguje, vsechny pocitace v jedne siti mohou pristupovat na vsechny pocitace v druhe siti a naopak.

Na routeru A je navic druha instance wireguardu ke ktere se pripojuji dalsi klienti. To se zda byt take v poradku. Klient bez problemu komunikuje se vsemi pocitaci v siti A

Divny problem nastava, kdyz se chce klient pripojit na pocitac v siti B. A ten problem je ten ze to funguje,nefunguje, funguje, nefunguje......

Router A: 172.17.130.0/24, VPN IP site2site 12.1.1.1, VPN pro clienty 13.1.1.1
Router B: 172.17.128.0/23, VPN IP 12.1.1.2
Klienti VPN 13.1.1.0/24 

Napriklad ping z klienta (13.1.1.5) na pocitac v siti B:

zsman@YOGA-LP:~$ ping 172.17.128.19
PING 172.17.128.19 (172.17.128.19) 56(84) bytes of data.
64 bytes from 172.17.128.19: icmp_seq=1 ttl=62 time=39.1 ms
64 bytes from 172.17.128.19: icmp_seq=2 ttl=62 time=39.1 ms
64 bytes from 172.17.128.19: icmp_seq=3 ttl=62 time=39.2 ms
64 bytes from 172.17.128.19: icmp_seq=4 ttl=62 time=38.6 ms
^C
--- 172.17.128.19 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 38.629/39.005/39.155/0.218 ms
zsman@YOGA-LP:~$ ping 172.17.128.19
PING 172.17.128.19 (172.17.128.19) 56(84) bytes of data.
^C
--- 172.17.128.19 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2055ms

zsman@YOGA-LP:~$ ping 172.17.128.19
PING 172.17.128.19 (172.17.128.19) 56(84) bytes of data.
64 bytes from 172.17.128.19: icmp_seq=1 ttl=62 time=38.7 ms
64 bytes from 172.17.128.19: icmp_seq=2 ttl=62 time=39.1 ms
64 bytes from 172.17.128.19: icmp_seq=3 ttl=62 time=38.6 ms
^C
--- 172.17.128.19 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 38.583/38.803/39.084/0.209 ms
zsman@YOGA-LP:~$ ping 172.17.128.19
PING 172.17.128.19 (172.17.128.19) 56(84) bytes of data.
^C
--- 172.17.128.19 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3058ms

zsman@YOGA-LP:~$ ping 172.17.128.19
PING 172.17.128.19 (172.17.128.19) 56(84) bytes of data.
64 bytes from 172.17.128.19: icmp_seq=1 ttl=62 time=37.9 ms
64 bytes from 172.17.128.19: icmp_seq=2 ttl=62 time=38.9 ms
64 bytes from 172.17.128.19: icmp_seq=3 ttl=62 time=38.5 ms
64 bytes from 172.17.128.19: icmp_seq=4 ttl=62 time=39.1 ms
64 bytes from 172.17.128.19: icmp_seq=5 ttl=62 time=38.0 ms
^C
--- 172.17.128.19 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4007ms
rtt min/avg/max/mdev = 37.863/38.460/39.051/0.466 ms

Proste: ping nejde Ctrl+C ping OK Ctrl+C ping nejde Ctrl+C ping OK

A opakuje se to presne takto stale dokola.

Stejne tak v pripade SSH, nejdriv nedostanu ani moznost zadat heslo, hned pri dalsim pokusu se mi uz prihlaseni objevi, pri dalsim zase nic, a pri dalsim zase ano. Kdyz uz se prihlasim, tak spojeni se zda bez problemu a drzi.

Pres ty VPN tunely jde jenom vnitrni komunikace, pristup do internetu jde z obou routetu i z klientu naprimo.

Takze mate nekdo tuseni cim by toto chovani mohlo byt zpusobeno? Nejake podrobnejsi info dodam, ale nevim co je potreba.

Dekuji

Odpovědi

[NN]

Logicky bych zacal na A a odsledoval, zda pakety odejnou na B a zda se vrati. V pripade, ze neódejdou problem je na A. V pripade, ze odejdou na B, ale nevrati se je problem na B. Tim zuzis okruh a budes pokracovat stejnym zpusobem dal.

[Tom]

Zdravim,

tak konecne uspech, ale tak nejak polovicni.. uz to funguje, ale konkretni duvod proc to nefungovalo nevim.... Hledal jsem to pomoci tcpdump, ale nic mi to nereklo (respektive moc netusim co mi to rikalo) Smazal jsem vsechna pravidla v obou firewallech a zacal znova a uz neni problem. Nejspis nejaky hloupy preklep v nejakem pravidlu.

No nic, jdu se dal ucit o firewallech

Diky.