Copy–>Past<\/strong><\/p>\n\n 2.1 Network Management Services2.2 Network Hardware2.3 Interfaces (+ Interface Statistics)2.4 Physical Link (ethtool)2.5 Interface Errors2.6 Bridge \/ VLAN (+ FDB)2.7 Bonding Configuration2.8 Network Configuration (Interfaces\/Netplan)2.9 Routing (+ Tables, Policy & Neighbors)2.10 DNS Mappings (\/etc\/hosts)2.11 Listening Ports (ss)2.12 Connectivity Checks (Ping & DNS Resolution)2.13 Proxy Configuration (Env\/APT\/wget)2.14 RPC \/ NFS Services2.15 Dynamic Routing (FRR\/BIRD\/OSPFd)2.16 Time Synchronization … Continue reading “0044_MobaXterm macros: 02.Debian-Network Assessment”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[21,26],"tags":[],"_links":{"self":[{"href":"https:\/\/itgen.itbumper.com\/index.php?rest_route=\/wp\/v2\/pages\/1116"}],"collection":[{"href":"https:\/\/itgen.itbumper.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/itgen.itbumper.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/itgen.itbumper.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itgen.itbumper.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1116"}],"version-history":[{"count":5,"href":"https:\/\/itgen.itbumper.com\/index.php?rest_route=\/wp\/v2\/pages\/1116\/revisions"}],"predecessor-version":[{"id":1136,"href":"https:\/\/itgen.itbumper.com\/index.php?rest_route=\/wp\/v2\/pages\/1116\/revisions\/1136"}],"wp:attachment":[{"href":"https:\/\/itgen.itbumper.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1116"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itgen.itbumper.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1116"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itgen.itbumper.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\necho "==================== 02. NETWORK ASSESSMENT ===================="; printf "\\n"; echo "2.1 NETWORK MANAGEMENT SERVICES"; echo "NetworkManager : $(systemctl is-active NetworkManager 2>\/dev\/null || echo not-installed)"; echo "networking : $(systemctl is-active networking 2>\/dev\/null || echo not-installed)"; echo "systemd-networkd : $(systemctl is-active systemd-networkd 2>\/dev\/null || echo not-installed)"; printf "\\n%.0s" {1..3}; echo "2.2 NETWORK HARDWARE"; lspci | grep -Ei 'ethernet|network' || echo "No PCI network adapters found"; printf "\\n%.0s" {1..3}; echo "2.3 INTERFACES"; ip -br link; printf "\\n"; ip -br addr; printf "\\n--- Interface Statistics ---\\n"; ip -s link; printf "\\n%.0s" {1..3}; echo "2.4 PHYSICAL LINK"; for IF in \/sys\/class\/net\/*; do IF=$(basename "$IF"); [ "$IF" = "lo" ] && continue; [ ! -e "\/sys\/class\/net\/$IF\/device" ] && continue; echo "--- $IF ---"; ethtool "$IF" 2>\/dev\/null | grep -E 'Speed|Duplex|Auto-negotiation|Link detected' || echo "No ethtool data"; done; printf "\\n%.0s" {1..3}; echo "2.5 INTERFACE ERRORS"; for IF in $(ip -o link show | awk -F': ' '{print $2}' | cut -d@ -f1); do [ ! -d "\/sys\/class\/net\/$IF\/statistics" ] && continue; printf "%-12s RX_ERR:%-8s RX_DROP:%-8s TX_ERR:%-8s TX_DROP:%-8s\\n" "$IF" "$(cat "\/sys\/class\/net\/$IF\/statistics\/rx_errors")" "$(cat "\/sys\/class\/net\/$IF\/statistics\/rx_dropped")" "$(cat "\/sys\/class\/net\/$IF\/statistics\/tx_errors")" "$(cat "\/sys\/class\/net\/$IF\/statistics\/tx_dropped")"; done; printf "\\n%.0s" {1..3}; echo "2.6 BRIDGE \/ VLAN"; echo "--- Bridges ---"; ip -br link show type bridge; printf "\\n--- Bridge Links ---\\n"; bridge link 2>\/dev\/null; printf "\\n--- Bridge VLANs ---\\n"; bridge vlan 2>\/dev\/null; printf "\\n--- Forwarding Database ---\\n"; bridge fdb show 2>\/dev\/null | head -80; printf "\\n%.0s" {1..3}; echo "2.7 BONDING"; if [ -d \/proc\/net\/bonding ]; then for B in \/proc\/net\/bonding\/*; do echo "--- $(basename "$B") ---"; cat "$B"; printf "\\n"; done; else echo "No bonding configuration found"; fi; printf "\\n%.0s" {1..3}; echo "2.8 NETWORK CONFIGURATION"; echo "--- \/etc\/network\/interfaces ---"; cat \/etc\/network\/interfaces 2>\/dev\/null || echo "Not found"; printf "\\n--- Netplan ---\\n"; if compgen -G "\/etc\/netplan\/*.yaml" >\/dev\/null; then cat \/etc\/netplan\/*.yaml 2>\/dev\/null; else echo "No netplan configuration"; fi; printf "\\n%.0s" {1..3}; echo "2.9 ROUTING"; echo "--- Default Gateway ---"; ip route show default; printf "\\n--- Routing Table ---\\n"; ip route; printf "\\n--- Policy Routing ---\\n"; ip rule; printf "\\n--- Detailed Routes ---\\n"; ip -details route; printf "\\n--- Neighbor Table ---\\n"; ip neigh; printf "\\n%.0s" {1..3}; echo "2.10 DNS"; resolvectl status 2>\/dev\/null || cat \/etc\/resolv.conf; printf "\\n--- \/etc\/hosts ---\\n"; cat \/etc\/hosts; printf "\\n%.0s" {1..3}; echo "2.11 LISTENING PORTS"; ss -tulpn; printf "\\n%.0s" {1..3}; echo "2.12 CONNECTIVITY"; GW=$(ip route | awk '\/default\/ {print $3; exit}'); echo "Default Gateway : ${GW:-Not configured}"; if [ -n "$GW" ]; then timeout 5 ping -c2 -W2 "$GW"; else echo "Gateway ping skipped"; fi; printf "\\n"; DNS=$(awk '\/^nameserver\/ {print $2; exit}' \/etc\/resolv.conf); echo "DNS Server : ${DNS:-Unknown}"; if [ -n "$DNS" ]; then timeout 5 ping -c2 -W2 "$DNS"; else echo "DNS server ping skipped"; fi; printf "\\n--- Internet (Cloudflare 1.1.1.1) ---\\n"; timeout 5 ping -c2 -W2 1.1.1.1; printf "\\n--- Internet (Google DNS 8.8.8.8) ---\\n"; timeout 5 ping -c2 -W2 8.8.8.8; printf "\\n--- DNS Resolution ---\\n"; getent hosts google.com || echo "DNS resolution failed"; printf "\\n--- Internet by Name ---\\n"; timeout 5 ping -c2 -W2 google.com; printf "\\n%.0s" {1..3}; echo "2.13 PROXY CONFIGURATION"; echo "--- Environment Variables ---"; env | grep -i proxy || echo "No proxy environment variables"; printf "\\n--- APT Proxy ---\\n"; grep -R "Acquire::.*Proxy" \/etc\/apt\/apt.conf* 2>\/dev\/null || echo "No APT proxy configured"; printf "\\n--- Systemd Environment ---\\n"; systemctl show-environment | grep -i proxy || echo "No systemd proxy variables"; printf "\\n--- wget Proxy ---\\n"; grep -i proxy ~\/.wgetrc \/etc\/wgetrc 2>\/dev\/null || echo "No wget proxy configuration"; printf "\\n%.0s" {1..3}; echo "2.14 RPC \/ NFS"; echo "rpcbind : $(systemctl is-active rpcbind 2>\/dev\/null || echo inactive)"; printf "\\n"; timeout 5 rpcinfo -p 2>\/dev\/null || echo "rpcinfo unavailable"; printf "\\n%.0s" {1..3}; echo "2.15 DYNAMIC ROUTING"; echo "FRR : $(systemctl is-active frr 2>\/dev\/null || echo not-installed)"; echo "BIRD : $(systemctl is-active bird 2>\/dev\/null || echo not-installed)"; echo "OSPFd : $(systemctl is-active ospfd 2>\/dev\/null || echo not-installed)"; printf "\\n%.0s" {1..3}; echo "2.16 TIME SYNCHRONIZATION"; timedatectl; printf "\\n"; echo "chronyd : $(systemctl is-active chronyd 2>\/dev\/null || echo not-installed)"; echo "chrony : $(systemctl is-active chrony 2>\/dev\/null || echo not-installed)"; echo "systemd-timesyncd : $(systemctl is-active systemd-timesyncd 2>\/dev\/null || echo not-installed)"; echo "ntp : $(systemctl is-active ntp 2>\/dev\/null || echo not-installed)"; echo "ntpd : $(systemctl is-active ntpd 2>\/dev\/null || echo not-installed)"; printf "\\n%.0s" {1..3}; echo "2.17 FIREWALL QUICK CHECK"; echo "nftables : $(systemctl is-active nftables 2>\/dev\/null || echo inactive)"; printf "\\n"; if command -v nft >\/dev\/null 2>&1; then echo "--- nftables ruleset ---"; nft list ruleset 2>\/dev\/null | head -80; else echo "nft command not found"; fi; printf "\\n--- iptables ---\\n"; iptables -L -n -v 2>\/dev\/null | head -80 || echo "iptables unavailable"; printf "\\n--- ip6tables ---\\n"; ip6tables -L -n -v 2>\/dev\/null | head -80 || echo "ip6tables unavailable"; printf "\\n--- UFW ---\\n"; ufw status verbose 2>\/dev\/null || echo "UFW not installed"\n<\/pre><\/div>\n\n\n# ==================== 02. NETWORK ASSESSMENT ====================\necho "==================== 02. NETWORK ASSESSMENT ===================="\nprintf "\\n"\n\n# --- 2.1 NETWORK MANAGEMENT SERVICES ---\necho "2.1 NETWORK MANAGEMENT SERVICES"\necho "NetworkManager : $(systemctl is-active NetworkManager 2>\/dev\/null || echo not-installed)"\necho "networking : $(systemctl is-active networking 2>\/dev\/null || echo not-installed)"\necho "systemd-networkd : $(systemctl is-active systemd-networkd 2>\/dev\/null || echo not-installed)"\nprintf "\\n%.0s" {1..3}\n\n# --- 2.2 NETWORK HARDWARE ---\necho "2.2 NETWORK HARDWARE"\nlspci | grep -Ei 'ethernet|network' || echo "No PCI network adapters found"\nprintf "\\n%.0s" {1..3}\n\n# --- 2.3 INTERFACES ---\necho "2.3 INTERFACES"\nip -br link\nprintf "\\n"\nip -br addr\nprintf "\\n\\n--- Interface Statistics ---\\n"\nip -s link\nprintf "\\n%.0s" {1..3}\n\n# --- 2.4 PHYSICAL LINK ---\necho "2.4 PHYSICAL LINK"\nfor IF in \/sys\/class\/net\/*; do\n IF=$(basename "$IF")\n [ "$IF" = "lo" ] && continue\n [ ! -e "\/sys\/class\/net\/$IF\/device" ] && continue\n echo "--- $IF ---"\n ethtool "$IF" 2>\/dev\/null | grep -E 'Speed|Duplex|Auto-negotiation|Link detected' || echo "No ethtool data"\ndone\nprintf "\\n%.0s" {1..3}\n\n# --- 2.5 INTERFACE ERRORS ---\necho "2.5 INTERFACE ERRORS"\nfor IF in $(ip -o link show | awk -F': ' '{print $2}' | cut -d@ -f1); do\n [ ! -d "\/sys\/class\/net\/$IF\/statistics" ] && continue\n printf "%-12s RX_ERR:%-8s RX_DROP:%-8s TX_ERR:%-8s TX_DROP:%-8s\\n" \\\n "$IF" \\\n "$(cat "\/sys\/class\/net\/$IF\/statistics\/rx_errors")" \\\n "$(cat "\/sys\/class\/net\/$IF\/statistics\/rx_dropped")" \\\n "$(cat "\/sys\/class\/net\/$IF\/statistics\/tx_errors")" \\\n "$(cat "\/sys\/class\/net\/$IF\/statistics\/tx_dropped")"\ndone\nprintf "\\n%.0s" {1..3}\n\n# --- 2.6 BRIDGE \/ VLAN ---\necho "2.6 BRIDGE \/ VLAN"\necho "--- Bridges ---"\nip -br link show type bridge\nprintf "\\n--- Bridge Links ---\\n"\nbridge link 2>\/dev\/null\nprintf "\\n--- Bridge VLANs ---\\n"\nbridge vlan 2>\/dev\/null\nprintf "\\n--- Forwarding Database ---\\n"\nbridge fdb show 2>\/dev\/null | head -80\nprintf "\\n%.0s" {1..3}\n\n# --- 2.7 BONDING ---\necho "2.7 BONDING"\nif [ -d \/proc\/net\/bonding ]; then\n for B in \/proc\/net\/bonding\/*; do\n echo "--- $(basename "$B") ---"\n cat "$B"\n printf "\\n"\n done\nelse\n echo "No bonding configuration found"\nfi\nprintf "\\n%.0s" {1..3}\n\n# --- 2.8 NETWORK CONFIGURATION ---\necho "2.8 NETWORK CONFIGURATION"\necho "--- \/etc\/network\/interfaces ---"\ncat \/etc\/network\/interfaces 2>\/dev\/null || echo "Not found"\nprintf "\\n--- Netplan ---\\n"\nif compgen -G "\/etc\/netplan\/*.yaml" >\/dev\/null; then\n cat \/etc\/netplan\/*.yaml 2>\/dev\/null\nelse\n echo "No netplan configuration"\nfi\nprintf "\\n%.0s" {1..3}\n\n# --- 2.9 ROUTING ---\necho "2.9 ROUTING"\necho "--- Default Gateway ---"\nip route show default\nprintf "\\n--- Routing Table ---\\n"\nip route\nprintf "\\n--- Policy Routing ---\\n"\nip rule\nprintf "\\n--- Detailed Routes ---\\n"\nip -details route\nprintf "\\n--- Neighbor Table ---\\n"\nip neigh\nprintf "\\n%.0s" {1..3}\n\n# --- 2.10 DNS ---\necho "2.10 DNS"\nresolvectl status 2>\/dev\/null || cat \/etc\/resolv.conf\nprintf "\\n--- \/etc\/hosts ---\\n"\ncat \/etc\/hosts\nprintf "\\n%.0s" {1..3}\n\n# --- 2.11 LISTENING PORTS ---\necho "2.11 LISTENING PORTS"\nss -tulpn\nprintf "\\n%.0s" {1..3}\n\n# --- 2.12 CONNECTIVITY ---\necho "2.12 CONNECTIVITY"\nGW=$(ip route | awk '\/default\/ {print $3; exit}')\necho "Default Gateway : ${GW:-Not configured}"\nif [ -n "$GW" ]; then\n timeout 5 ping -c2 -W2 "$GW"\nelse\n echo "Gateway ping skipped"\nfi\nprintf "\\n"\nDNS=$(awk '\/^nameserver\/ {print $2; exit}' \/etc\/resolv.conf)\necho "DNS Server : ${DNS:-Unknown}"\nif [ -n "$DNS" ]; then\n timeout 5 ping -c2 -W2 "$DNS"\nelse\n echo "DNS server ping skipped"\nfi\nprintf "\\n--- Internet (Cloudflare 1.1.1.1) ---\\n"\ntimeout 5 ping -c2 -W2 1.1.1.1\nprintf "\\n--- Internet (Google DNS 8.8.8.8) ---\\n"\ntimeout 5 ping -c2 -W2 8.8.8.8\nprintf "\\n--- DNS Resolution ---\\n"\ngetent hosts google.com || echo "DNS resolution failed"\nprintf "\\n--- Internet by Name ---\\n"\ntimeout 5 ping -c2 -W2 google.com\nprintf "\\n%.0s" {1..3}\n\n# --- 2.13 PROXY CONFIGURATION ---\necho "2.13 PROXY CONFIGURATION"\necho "--- Environment Variables ---"\nenv | grep -i proxy || echo "No proxy environment variables"\nprintf "\\n--- APT Proxy ---\\n"\ngrep -R "Acquire::.*Proxy" \/etc\/apt\/apt.conf* 2>\/dev\/null || echo "No APT proxy configured"\nprintf "\\n--- Systemd Environment ---\\n"\nsystemctl show-environment | grep -i proxy || echo "No systemd proxy variables"\nprintf "\\n--- wget Proxy ---\\n"\ngrep -i proxy ~\/.wgetrc \/etc\/wgetrc 2>\/dev\/null || echo "No wget proxy configuration"\nprintf "\\n%.0s" {1..3}\n\n# --- 2.14 RPC \/ NFS ---\necho "2.14 RPC \/ NFS"\necho "rpcbind : $(systemctl is-active rpcbind 2>\/dev\/null || echo inactive)"\nprintf "\\n"\ntimeout 5 rpcinfo -p 2>\/dev\/null || echo "rpcinfo unavailable"\nprintf "\\n%.0s" {1..3}\n\n# --- 2.15 DYNAMIC ROUTING ---\necho "2.15 DYNAMIC ROUTING"\necho "FRR : $(systemctl is-active frr 2>\/dev\/null || echo not-installed)"\necho "BIRD : $(systemctl is-active bird 2>\/dev\/null || echo not-installed)"\necho "OSPFd : $(systemctl is-active ospfd 2>\/dev\/null || echo not-installed)"\nprintf "\\n%.0s" {1..3}\n\n# --- 2.16 TIME SYNCHRONIZATION ---\necho "2.16 TIME SYNCHRONIZATION"\ntimedatectl\nprintf "\\n"\necho "chronyd : $(systemctl is-active chronyd 2>\/dev\/null || echo not-installed)"\necho "chrony : $(systemctl is-active chrony 2>\/dev\/null || echo not-installed)"\necho "systemd-timesyncd : $(systemctl is-active systemd-timesyncd 2>\/dev\/null || echo not-installed)"\necho "ntp : $(systemctl is-active ntp 2>\/dev\/null || echo not-installed)"\necho "ntpd : $(systemctl is-active ntpd 2>\/dev\/null || echo not-installed)"\nprintf "\\n%.0s" {1..3}\n\n# --- 2.17 FIREWALL QUICK CHECK ---\necho "2.17 FIREWALL QUICK CHECK"\necho "nftables : $(systemctl is-active nftables 2>\/dev\/null || echo inactive)"\nprintf "\\n"\nif command -v nft >\/dev\/null 2>&1; then\n echo "--- nftables ruleset ---"\n nft list ruleset 2>\/dev\/null | head -80\nelse\n echo "nft command not found"\nfi\nprintf "\\n--- iptables ---\\n"\niptables -L -n -v 2>\/dev\/null | head -80 || echo "iptables unavailable"\nprintf "\\n--- ip6tables ---\\n"\nip6tables -L -n -v 2>\/dev\/null | head -80 || echo "ip6tables unavailable"\nprintf "\\n--- UFW ---\\n"\nufw status verbose 2>\/dev\/null || echo "UFW not installed"\n<\/pre><\/div>\n\n![\"\"](\"https:\/\/itgen.itbumper.com\/wp-content\/uploads\/2026\/07\/002_debian_network-assessment-01.png\")
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