Install AmneziaWG 3.1 / 2.0 VPN on Ubuntu and Debian VPS

  cd "$(mktemp -d)"
  KEY=RWQXfpABHIpZPttqrwYrQNHRTk/iLIz4cVh9KkRwAElHP+CoW/NPEysN
  M=manage_amneziawg_en.sh C=awg_common_en.sh   # Russian version: M=manage_amneziawg.sh C=awg_common.sh
  ok=1 tag=
  for f in "$M" "$C"; do
    wget -q -O "$f"         "https://github.com/bivlked/amneziawg-installer/releases/latest/download/$f" \
      && wget -q -O "$f.minisig" "https://github.com/bivlked/amneziawg-installer/releases/latest/download/$f.minisig" \
      && out=$(minisign -V -P "$KEY" -m "$f" -x "$f.minisig") \
      && t=$(printf '%s\n' "$out" | sed -n "s/^Trusted comment: amneziawg-installer \(v[0-9.]*\) $f\$/\1/p") \
      && [ -n "$t" ] && [ "${tag:-$t}" = "$t" ] || { echo "NOT VERIFIED: $f"; ok=0; break; }
    tag=$t
  done
  [ "$ok" = 1 ] && { old=$(sudo sed -n 's/^SCRIPT_VERSION="\(.*\)"/v\1/p' /root/awg/manage_amneziawg.sh) && [ -n "$old" ] \
    || { echo "NOT VERIFIED: cannot read the installed version from /root/awg/manage_amneziawg.sh"; ok=0; }; }
  [ "$ok" = 1 ] && [ "$(printf '%s\n' "$old" "$tag" | sort -V | tail -1)" != "$tag" ] \
    && { echo "NOT VERIFIED: release $tag is older than the installed $old"; ok=0; }
  [ "$ok" = 1 ] && { sudo install -m 700 "$M" /root/awg/manage_amneziawg.sh \
    && sudo install -m 700 "$C" /root/awg/awg_common.sh && echo "Installed verified release $tag" || echo "NOT FULLY INSTALLED: run the block again"; }
  

• No packets from the phone at all: check the address and port in Endpoint, the firewall and whether the hosting address is blocked. If it is the port, try --mobile (the mobile preset plus port 443/udp); on a running server that is a --force reinstall and reissuing every client config.
• Packets arrive, but the peer endpoint does not change: S1-S4 or H1-H4 differ between server and client.
• The endpoint changes and the receive counter grows, but latest handshake stays empty: that is I1. Since v5.33.0 new installs get it in DNS-response shape automatically; on older profiles you edit I1 in the client .conf, the server stays as it is.