[SOLVED] unable to connect to Web UI but SSH works

[Joris L.]

Whenever you cannot connect to the Web UI (login failed, please try again) and the logs in /var/log/pveproxy/access.log show HTTP 595 errors on access tickets

This is most likely due to failing localhost to localhost communications, try

iptables -A INPUT -i lo -s 127.0.0.1 -j ACCEPT
iptables -A FORWARD -i lo -s 127.0.0.1/8 -j ACCEPT
iptables -A FORWARD -o lo -d 127.0.0.1/8 -j ACCEPT
iptables -A OUTPUT -o lo -d 127.0.0.1 -j ACCEPT

If you want to change something in Promox /etc/network/interfaces
> copy interfaces to interfaces.new,
> then edit interfaces.new
> then save and run

systemctl restart pvenetcommit

then run

systemctl reload networking

Cheers

JL