source: Windows 10 Server (local port 8081)

destination: Ubuntu

ssh tunnel: Putty

Windows10 server------->ssh tunnel--------->Ubuntu

I have the ssh tunnel up between the source and destination

destination netstat:

tcp 0 0 asdasd.asd.asd:62040 ESTABLISHED

source is binding on port 8081:

C:\Users\asd\Desktop>netstat -a | find /N "8081"
[29]  TCP         asd_asd:0          LISTENING

Problem is, when I set the browser or system proxy to localhost:8081 on the source side nothing works. On the destination I ran a tcpdump matching against dest port 8081 to see if the packet comes out of the tunnel but looks like it doesn't:

asd@asdasd:/var/log$ sudo tcpdump dst port 8081
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes

I'm trying telnet on the source side to trigger the tcpdump:

C:\Users\asd\Desktop>telnet 8081

On the destination side I got the following enabled under sshd_config:

AllowAgentForwarding yes
AllowTcpForwarding yes
GatewayPorts yes

On the source side I have MS Defender off, checked the router logs nothing. It almost feels like the packets never get into the tunnel. Any idea how to troubleshoot futher?


You must log in to answer this question.

Browse other questions tagged .