On 11/28/23 05:24, Christoph Kukulies wrote:
root@mail:/var/lib/tomcat9/logs# lsof -i :8080
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 58986 tomcat 37u IPv6 571175 0t0 TCP *:http-alt (LISTEN)
root@mail:/var/lib/tomcat9/logs#
On my local desktop (running Ubuntu 22), it says IPv6 but IPv4 works
just fine:
sheisey@sheisey-desktop:~$ sudo lsof -Pn -i :81
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
apache2 1681 root 4u IPv6 30968 0t0 TCP *:81 (LISTEN)
apache2 173394 www-data 4u IPv6 30968 0t0 TCP *:81 (LISTEN)
apache2 173395 www-data 4u IPv6 30968 0t0 TCP *:81 (LISTEN)
sheisey@sheisey-desktop:~$ ip a show br0
3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UP group default qlen 1000
link/ether be:3f:67:fc:ce:6b brd ff:ff:ff:ff:ff:ff
inet 192.168.217.210/24 brd 192.168.217.255 scope global dynamic
noprefixroute br0
valid_lft 2396sec preferred_lft 2396sec
inet6 fe80::bc3f:67ff:fefc:ce6b/64 scope link
valid_lft forever preferred_lft forever
sheisey@sheisey-desktop:~$ telnet 192.168.217.210 81
Trying 192.168.217.210...
Connected to 192.168.217.210.
Escape character is '^]'.
^]
telnet> quit
Connection closed.
I would suspect something like firewall/selinux/apparmor. On this
ubuntu desktop, ufw is disabled, so the connection also works from other
systems on the LAN.
Thanks,
Shawn
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