I-VPN iyahlukana ngesikhathi esifanayo? Qondanisa isikhathi
Ukuphuka ngesikhathi esingaguquki kuwuphawu lomunwe. Ngaphambi kokushintsha noma yini, qhathanisa ukuvuselelwa kokhiye kwethuneli, isikhathi sokungenzi lutho se-NAT, ukuqashwa kwe-DHCP kanye nomkhawulo we-akhawunti.
Ithuneli efa njalo ngemizuzu eyishumi nanhlanu, noma njalo ngehora ngomzuzu ofanayo, ikutshela ukuthi isikhathi esithile siphelile, hhayi ukuthi inethiwekhi ayizinzile. Isinyathelo esiwusizo ukubhala phansi isikhathi bese usiqhathanisa nezikhathi ezine ezikhiqiza leli phethini. Ukushintsha izikhathi zokulinda ngaphambi kwalokho kuqhathanisa kuvamise ukuhambisa iphutha ngaphandle kokulichaza, okwenza isigameko esilandelayo sibe nzima ukusifunda kunesokuqala. Ukulinganisa kuthatha imizuzu eyishumi futhi kuthatha indawo yeviki lokucabanga.
Guqula isikhathi sibe inombolo
Qoqa izigameko ezinhlanu noma eziyisithupha bese ubala isikhala phakathi kwazo, hhayi isikhala kusukela ekuqaleni kosuku. Ukuphuka ngo-09:12, 10:12 no-11:12 kuwumngcele wehora; ukuphuka ngo-09:12, 09:27 no-09:42 yimizuzu eyishumi nanhlanu kusukela ekuxhumekeni kokugcina okuphumelele. Songa umphumela esikhathini esingenzeka kakhulu, hhayi emzuzwini oseduze kakhulu.
Bhala izikhathi ezimbili ngesigameko: ukuthi ithrafikhi yagcina nini ukunyakaza nokuthi iklayenti labika nini ukuhlukana. Lezi ziyahluka lapho ithuneli lifa buthule futhi iklayenti libona kuphela ekuthumeleni okulandelayo, futhi lowo mehluko uhlukanisa isikhathi sokungenzi lutho nephutha eliqinile. Iklayenti elibona sekwephuzile likhulisa iwindi lokungenzi lutho olilinganisayo.
Qaphela ukuthi ukuxhuma kabusha kuyazenzakalela yini. Iklayenti elixhuma kabusha phakathi namasekhondi ligcina isikhathi sibonakala kulogi futhi ngaphandle kombiko womsebenzisi, yingakho lezi ziphethu zivame ukuchazwa njengezedlulayo hhayi ezejwayelekile. Kubuye kufihle isigameko kumuntu osebenzisa ikhompyutha ephathwayo.
Izikhathi ezine ezibukeka zifana
Cishe konke ukuwa kwethuneli okuphindaphindiwe kuvela kwesinye salezi: ukuvuselelwa kokhiye kwephrothokholi, ukuphela kokubanjwa okungenzi lutho, isigameko se-DHCP noma se-interface, noma inqubomgomo ye-akhawunti. Ziyahluka ngokuthi ithrafikhi ibihamba yini nangalokho okushiwo kulogi emngceleni.
Izimpawu ezingezansi kufanele zifundwe, ngoba zikuvumela ukwenqaba izincazelo ezintathu kumugqa oyedwa wokuloga:
| Timer | Typical trigger | What the log shows at the boundary |
|---|---|---|
| Protocol rekey | Traffic present, fixed interval | Negotiation lines, sometimes a failure |
| NAT or firewall idle | No traffic for minutes | Silence, then a timeout on send |
| DHCP lease or link change | Half the lease, or a radio event | Address or interface churn |
| Account session limit | Wall-clock hours since login | Clean disconnect, server-side reason |
Umugqa wokuqala uyindlela yokuphepha eyenza umsebenzi wayo, kanti owesibili yisidlali esiphakathi esikhohlwa isimo. Ukuzihlanganisa kuholela ekunciphiseni ukuvuselelwa kokhiye noma ekujahiseleni umthetho we-firewall ongakaze ube khona.
Ukuxakeka nokungenzi lutho kutshela ukuthi ikuphi uhhafu
Yenza ukuqhathanisa okulawulwayo ngethrafikhi eqhubekayo, njengomfudlana omude oya kumsingathi ngaphakathi kwethuneli, bese ubheka ukuthi isikhathi siyashintsha yini. Uma ukuphuka kunyamalala ngenkathi idatha ihamba, isikhathi sisekelwe ekungenzi lutho.
Uma sikhuthazelela ithrafikhi eqhubekayo, imbangela ingeyokuvuselela, ukuqashwa noma inqubomgomo. Lokho kuhlolwa okukodwa kususa uhhafu wabagqugquzeli esikhathini esingaba ihora lokubuka, futhi akubizi lutho ngaphandle kokunaka.
Gcina inethiwekhi yokufinyelela ingashintshile phakathi nokuhlolwa. Ukushintsha phakathi kwe-Wi-Fi ne-Ethernet maphakathi nokuqhathanisa kuletha ngqo isigameko se-interface ozama ukusihlukanisa nesikhathi.
Qondanisa umugqa wokuloga nomngcele
Funda amalogi eklayenti neseva azungeze isikhathi esirekhodiwe, hhayi ifayela lonke. Ukuvuselela kukhombisa izingxoxo; ukuphela kokungenzi lutho akukhombisi lutho kuze kube iphakethe elilandelayo; ukushintsha kokuqashwa kukhombisa umsebenzi wekheli; umkhawulo wenqubomgomo uvamise ukukhombisa ukunqanyulwa kwezokulawula okuhlanzekile.
Le mikhiqizo idonsa iwindi elifanele kumthombo ngamunye:
grep -iE "reneg|TLS Error|Inactivity" /var/log/openvpn.log | tail -20
journalctl -u NetworkManager --since "-90 min" | grep -iE "dhcp|link"
wg showUma imithombo emithathu ivumelana ngesigxivizo sesikhathi, uyazi umnikazi wesikhathi. Uma kulogi yeklayenti kuphela okukhona, cishe iseva akusiyo eyiphetha isikhathi sokuhlangana.
Lungisa isigaba, hhayi isithonjana
Umnikazi ngamunye unokulungiswa okukodwa okuxhasiwe. Ukwehluleka kokuvuselela kudinga iziphakamiso ezihambisanayo ezinhlangothini zombili. Ukuphela kokungenzi lutho kudinga isignali yokuphila noma ukulindela okufushane kokungenzi lutho, ngaphakathi kwalokho okuvunyelwa indlela. Isigameko sokuqashwa sidinga izilungiselelo ze-interface noma zamandla zilungiswe. Umkhawulo we-akhawunti yisinqumo senqubomgomo, hhayi iphutha.
Ukucisha ukuvuselela noma ukuqinisekisa ukuze isithonjana sihlale siluhlaza kushintsha ukuwa okubonakalayo nobuthakathaka obungabonakali, futhi kukushiya ungakwazi ukusho ukuthi ithuneli lagcina nini ukuxoxisana ngokhiye abasha. Bese uhlola futhi isikhathi sokuqala futhi ugcine izigxivizo zesikhathi, ukuze isigameko esilandelayo siqhathaniswe nalesi esikhundleni sokuqala kabusha.