Dear all
I'm trying to completely disable IPv6 on my Proxmox system, but even after following the instructions, I am still seeing IPv6 addresses in the output of netstat. Here's what I've tried so far:
Firewall: I also disabled the firewall completely via the GUI, to rule out any firewall-related interference.
However, when I check the network connections with netstat, I still see IPv6 addresses active.
Despite my attempts, I am still unable to fully disable IPv6. Could someone please guide me on what I might be missing or any additional steps I need to take?
Thanks in advance!
I'm trying to completely disable IPv6 on my Proxmox system, but even after following the instructions, I am still seeing IPv6 addresses in the output of netstat. Here's what I've tried so far:
Code:
cat /etc/kernel/cmdline
root=ZFS=rpool/ROOT/pve-1 boot=zfs amd_iommu=on intel_iommu=on iommu=pt pcie_acs_override=downstream,multifunction ipv6.disable=1
root@PVEN01:~# sysctl --system
* Applying /usr/lib/sysctl.d/10-pve-ct-inotify-limits.conf ...
* Applying /usr/lib/sysctl.d/10-pve.conf ...
* Applying /etc/sysctl.d/30-ceph-osd.conf ...
* Applying /usr/lib/sysctl.d/50-pid-max.conf ...
* Applying /usr/lib/sysctl.d/99-protect-links.conf ...
* Applying /etc/sysctl.d/99-sysctl.conf ...
* Applying /etc/sysctl.d/disable-ipv6.conf ...
* Applying /usr/lib/sysctl.d/pve-firewall.conf ...
* Applying /etc/sysctl.d/swappiness.conf ...
* Applying /etc/sysctl.conf ...
fs.inotify.max_queued_events = 8388608
fs.inotify.max_user_instances = 65536
fs.inotify.max_user_watches = 4194304
vm.max_map_count = 262144
net.ipv4.neigh.default.gc_thresh3 = 8192
net.ipv6.neigh.default.gc_thresh3 = 8192
kernel.keys.maxkeys = 2000
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
net.bridge.bridge-nf-filter-vlan-tagged = 0
net.ipv4.igmp_link_local_mcast_reports = 0
fs.aio-max-nr = 1048576
fs.aio-max-nr = 1048576
kernel.pid_max = 4194304
kernel.pid_max = 4194304
fs.protected_fifos = 1
fs.protected_hardlinks = 1
fs.protected_regular = 2
fs.protected_symlinks = 1
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv4.conf.all.rp_filter = 2
vm.swappiness = 0
root@PVEN01:~# netstat -tulpen
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program name
tcp 0 0 127.0.0.1:85 0.0.0.0:* LISTEN 0 217094 7222/pvedaemon
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 0 72723 7105/master
tcp 0 0 127.0.0.1:2616 0.0.0.0:* LISTEN 110 130066 6480/staticd
tcp 0 0 127.0.0.1:2617 0.0.0.0:* LISTEN 110 215060 6483/bfdd
tcp 0 0 127.0.0.1:2605 0.0.0.0:* LISTEN 110 140317 6473/bgpd
tcp 0 0 127.0.0.1:2601 0.0.0.0:* LISTEN 110 215054 6466/zebra
tcp 0 0 0.0.0.0:7860 0.0.0.0:* LISTEN 1000 152599 7189/venv/bin/pytho
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 0 79893 6882/sshd: /usr/sbi
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 0 167937 1/init
tcp6 0 0 :::11434 :::* LISTEN 999 134173 10044/ollama
tcp6 0 0 :::8006 :::* LISTEN 33 58382 7306/pveproxy
tcp6 0 0 :::3128 :::* LISTEN 33 42006 7322/spiceproxy
tcp6 0 0 :::22 :::* LISTEN 0 79895 6882/sshd: /usr/sbi
tcp6 0 0 :::111 :::* LISTEN 0 125955 1/init
udp 0 0 0.0.0.0:111 0.0.0.0:* 0 168961 1/init
udp 0 0 127.0.0.1:323 0.0.0.0:* 0 44521 6926/chronyd
udp 0 0 0.0.0.0:3784 0.0.0.0:* 110 189498 6483/bfdd
udp 0 0 0.0.0.0:4784 0.0.0.0:* 110 189499 6483/bfdd
udp6 0 0 :::111 :::* 0 140291 1/init
udp6 0 0 ::1:323 :::* 0 44522 6926/chronyd
udp6 0 0 :::3784 :::* 110 189500 6483/bfdd
udp6 0 0 :::3785 :::* 110 189503 6483/bfdd
udp6 0 0 :::4784 :::* 110 189501 6483/bfdd
root@PVEN01:~#Firewall: I also disabled the firewall completely via the GUI, to rule out any firewall-related interference.
However, when I check the network connections with netstat, I still see IPv6 addresses active.
Despite my attempts, I am still unable to fully disable IPv6. Could someone please guide me on what I might be missing or any additional steps I need to take?
Thanks in advance!
Last edited:
