Nu vreau sa las pe oricine sa iasa din reteaua interna pe ssh inspre alte servere.
----- Original Message ----- From: "Knight" <[EMAIL PROTECTED]> To: "Ioan Alin" <[EMAIL PROTECTED]> Sent: Tuesday, October 14, 2003 5:54 PM Subject: [rlug] Re: ICQ & YM and firewall > Ioan, > > adica tu nu vrei sa lasi pe oricine sa iasa din reteaua interna pe ssh > inspre alte servere? > sau nu vrei sa se poata comecta la tine la server pe ssh numai de la > anumite ip-uri? > > Tuesday, October 14, 2003, 4:46:39 PM, you wrote: > > IA> Problema este ca nu stiu ip-ul destinatie (ar fi usor). Tot ce as vrea este, > IA> ca din router, sa tai clientii de ssh de pe ip-uri .(cand cineva vrea sa > IA> faca o conexiune pe un server oarecare de ssh). > > IA> ----- Original Message ----- > IA> From: "Radu" <[EMAIL PROTECTED]> > IA> To: <[EMAIL PROTECTED]> > IA> Sent: Wednesday, October 15, 2003 2:41 AM > IA> Subject: [rlug] Re: ICQ & YM and firewall > > > >> Frate Alin, > >> > >> Din ce imi aduc aminte, dar nu sunt sigur, trebuie totusi sa verifici. > >> Urmatoarele: > >> Daca este router: > >> iptables -A FORWARD -s <ip pe cine vrei sa arzi> -d <ip-ul > >> serverului ssh> -j DROP > >> Daca vrei de pe un anume host sa nu permiti iesirea: > >> iptables -A OUTPUT -d <ip-ul serverului ssh> -j DROP > >> Chestiile de mai sus taie tot traficul catre serverul respectiv. > >> > >> > >> Cu plecaciuni, maestre. > >> > >> ----- Original Message ----- > >> From: "Ioan Alin" <[EMAIL PROTECTED]> > >> To: <[EMAIL PROTECTED]> > >> Sent: Tuesday, October 14, 2003 7:32 AM > >> Subject: [rlug] Re: ICQ & YM and firewall > >> > >> > >> > > >> > Pe mie m-ar interesa sa tai si toate iesirile catre un server de ssh > >> .(orice > >> > port, nu neaparat 22). > >> > > >> > ----- Original Message ----- > >> > From: "Radu" <[EMAIL PROTECTED]> > >> > To: <[EMAIL PROTECTED]> > >> > Sent: Wednesday, October 15, 2003 2:29 AM > >> > Subject: [rlug] Re: ICQ & YM and firewall > >> > > >> > > >> > > Frate, nu este nici o problema. > >> > > Ideea este cum s-ar putea face totusi cu nenorocitul ala de yahoo > >> > > messenger... ca si pe mine ma streseaza treaba asta. > >> > > Si nu am nici prea multe idei... in directia asta... > >> > > Poate s-a ocupat cineva totusi... doar de blocarea lui yahoo messenger > >> > ...? > >> > > > >> > > Radu. > >> > > ----- Original Message ----- > >> > > From: "Knight" <[EMAIL PROTECTED]> > >> > > To: "Radu" <[EMAIL PROTECTED]> > >> > > Sent: Tuesday, October 14, 2003 8:23 AM > >> > > Subject: [rlug] Re: ICQ & YM and firewall > >> > > > >> > > > >> > > > Radu, > >> > > > > >> > > > cred ca mia culpa > >> > > > da de unde dracu am citit eu cu ipchains ca stiu sigur ca asa am > IA> citit > >> > > > what so ever > >> > > > sorry > >> > > > > >> > > > Wednesday, October 15, 2003, 2:05:25 AM, you wrote: > >> > > > > >> > > > R> Frate Knight, > >> > > > > >> > > > R> Ar fi bine sa stai sa te uiti cu atentie la threaduri. > IA> Sarmanul > >> > om > >> > > > R> intrebase pentru iptables. Asa, de chestie doar, uita-te in urma > IA> sa > >> > > vezi ca > >> > > > R> dai putin aiurea cu raspunsurile. Chestia cu deschisul ochilor... > >> > este > >> > > > R> foarte adevarata. Incepe chiar din primul mail.... > >> > > > R> Din ratiuni de documentare... il listez mai jos... sper sa nu > >> te > >> > > superi > >> > > > R> pe mine, dar mi se pare ca scrie iptables. Stiu asta pentru ca am > >> > > terminat > >> > > > R> clasa I premiant... :)) > >> > > > > >> > > > R> Sa fi cuminte, > >> > > > R> Radu. > >> > > > > >> > > > > >> > > > > >> > > > >> > > >> > R>> ------------------------------------------------------------------------ - > >> > > -- > >> > > > R> Salut, > >> > > > > >> > > > R> Am un script de firewall, facut cu iptables, pe un > IA> gateway > >> > care > >> > > are > >> > > > R> ca politica pe chain-ul forward "DROP" si permite userilor > IA> din > >> > > > R> reteua locala sa se conecteze, in internet, doar la > IA> porturile > >> > 80, > >> > > 25, > >> > > > R> 110. > >> > > > R> Ideea mea ar fi ca lumea din reteua locala sa nu poata iesi > >> > decat > >> > > pe > >> > > > R> web si pe mail. > >> > > > R> Problema apare cand ICQ sau YM foloseste orice port > IA> pentru > >> a > >> > > se > >> > > > R> conecta in exterior si se leaga la o multitudine de adrese. > >> > Astfel > >> > > > R> din reteua locala se poate face chat in voie. > >> > > > R> Imi poate spune cineva cum se rezolva beleua asta ? > >> > > > > >> > > > > >> > > > R> -- > >> > > > R> Multumesc anticipat, > >> > > > R> Liviu mailto:[EMAIL PROTECTED] > >> > > > > >> > > > > >> > > > R> --- > >> > > > R> Detalii despre listele noastre de mail: http://www.lug.ro/ > >> > > > > >> > > > >> > > >> > R>> ------------------------------------------------------------------------ > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> > > > R> ----- Original Message ----- > >> > > > R> From: "Knight" <[EMAIL PROTECTED]> > >> > > > R> To: "Radu" <[EMAIL PROTECTED]> > >> > > > R> Sent: Tuesday, October 14, 2003 7:55 AM > >> > > > R> Subject: [rlug] Re: ICQ & YM and firewall > >> > > > > >> > > > > >> > > > >> Radu, > >> > > > >> > >> > > > >> tu ai citit macar ce am scris? > >> > > > >> omu care a postat threadul a cerut help pentru ipchains > >> > > > >> asa ca nu sari la mine > >> > > > >> chestie de alfabet pe dracu, chestie de urmarit un thread si de > >> > > > >> deschis ochii larg :)) > >> > > > >> > >> > > > >> Wednesday, October 15, 2003, 1:48:55 AM, you wrote: > >> > > > >> > >> > > > >> R> Mosule, IPTABLES. Nu ipchains. > >> > > > >> R> Chestie de alfabet. > >> > > > >> R> ----- Original Message ----- > >> > > > >> R> From: "Knight" <[EMAIL PROTECTED]> > >> > > > >> R> To: "Dekxter X." <[EMAIL PROTECTED]> > >> > > > >> R> Sent: Tuesday, October 14, 2003 7:01 AM > >> > > > >> R> Subject: [rlug] Re: ICQ & YM and firewall > >> > > > >> > >> > > > >> > >> > > > >> >> Dekxter, > >> > > > >> >> > >> > > > >> >> da dar omu a specificat ca vrea ipchains > >> > > > >> >> :((((((( > >> > > > >> >> cu -y cred ca era in ipchains :)) in loc de --syn > >> > > > >> >> > >> > > > >> >> Monday, October 13, 2003, 6:32:40 PM, you wrote: > >> > > > >> >> > >> > > > >> >> DX> va trebui sa modifici FORWARD cu: > >> > > > >> >> > >> > > > >> >> DX> iptables --policy FORWARD DROP > >> > > > >> >> > >> > > > >> >> DX> iptables -A FORWARD -d 192.168.0.0/24 -p tcp --dport > >> > 5 --jump > >> > > > R> ACCEPT > >> > > > >> >> DX> iptables -A FORWARD -d 192.168.0.0/24 -p tcp --dport > >> > 0 --jump > >> > > > R> ACCEPT > >> > > > >> >> DX> iptables -A FORWARD -d 192.168.0.0/24 -p tcp --dport > >> > 110 --jump > >> > > > R> ACCEPT > >> > > > >> >> DX> iptables -A FORWARD -d 192.168.0.0/24 -p tcp --dport > >> > 143 --jump > >> > > > R> ACCEPT > >> > > > >> >> DX> # aceste 4 reguli sunt pentru acces la orice adresa pentru > >> > > > >> >> DX> # mail prin POP3, IMAP, send shi www > >> > > > >> >> > >> > > > >> >> DX> iptables -A FORWARD -d 192.168.0.0/24 --syn --jump DROP > >> > > > >> >> DX> iptables -A FORWARD -s 192.168.0.0/24 --syn --jump DROP > >> > > > >> >> DX> # aceste 2 reguli resping orice tentativa de initiere a > IA> unei > >> > > > R> conectari > >> > > > >> >> DX> # in reteaua locala sau de la reteaua locala spre internet > >> > > > >> >> > >> > > > >> >> DX> iptables -A FORWARD -d 192.168.0.0/24 -p tcp --jump ACCEPT > >> > > > >> >> DX> # acesta regula accepta orice alt tip de conexiune tcp > >> > > > >> >> > >> > > > >> >> > >> > > > >> >> > >> > > > >> >> DX> # man iptables > >> > > > >> >> > >> > > > >> >> DX> [!] --syn > >> > > > >> >> DX> Only match TCP packets with the SYN bit set and the > IA> ACK > >> > and > >> > > > R> RST > >> > > > >> >> DX> bits cleared. Such packets are used to request TCP > >> > > connection > >> > > > >> >> DX> initiation; for example, blocking such packets coming in > IA> an > >> > > > R> interface > >> > > > >> >> DX> will prevent incoming TCP connections, but outgoing TCP > >> > > connections > >> > > > >> R> will > >> > > > >> >> DX> be unaffected. > >> > > > >> >> DX> It is equivalent to --tcp-flags SYN,RST,ACK SYN. If the > IA> "!" > >> > flag > >> > > > >> >> DX> precedes the "--syn", the sense of the option is inverted. > >> > > > >> >> > >> > > > >> >> DX> ps: daca greshesc va rog sa ma corectatzi ... > >> > > > >> >> > >> > > > >> >> DX> Liviu wrote: > >> > > > >> >> > >> > > > >> >> >> Salut, > >> > > > >> >> >> Ideea mea ar fi ca lumea din reteua locala sa nu poata > >> > iesi > >> > > > R> decat > >> > > > >> R> pe > >> > > > >> >> >> web si pe mail. > >> > > > >> >> > >> > > > >> >> > >> > > > >> >> > >> > > > >> >> -- > >> > > > >> >> Best regards, > >> > > > >> >> Knight > >> > > > >> >> > >> > > > >> >> This message was brought to you by the numbers 0 and 1. > >> > > > >> >> > >> > > > >> >> > >> > > > >> >> --- > >> > > > >> >> Detalii despre listele noastre de mail: http://www.lug.ro/ > >> > > > >> >> > >> > > > >> >> > >> > > > >> > >> > > > >> > >> > > > >> R> --- > >> > > > >> R> Detalii despre listele noastre de mail: http://www.lug.ro/ > >> > > > >> > >> > > > >> > >> > > > >> > >> > > > >> -- > >> > > > >> Best regards, > >> > > > >> Knight > >> > > > >> > >> > > > >> This message was brought to you by the numbers 0 and 1. > >> > > > >> > >> > > > >> > >> > > > >> --- > >> > > > >> Detalii despre listele noastre de mail: http://www.lug.ro/ > >> > > > >> > >> > > > >> > >> > > > > >> > > > > >> > > > R> --- > >> > > > R> Detalii despre listele noastre de mail: http://www.lug.ro/ > >> > > > > >> > > > > >> > > > > >> > > > -- > >> > > > Best regards, > >> > > > Knight > >> > > > > >> > > > This message was brought to you by the numbers 0 and 1. > >> > > > > >> > > > > >> > > > --- > >> > > > Detalii despre listele noastre de mail: http://www.lug.ro/ > >> > > > > >> > > > > >> > > > >> > > > >> > > --- > >> > > Detalii despre listele noastre de mail: http://www.lug.ro/ > >> > > > >> > > >> > > >> > --- > >> > Detalii despre listele noastre de mail: http://www.lug.ro/ > >> > > >> > > >> > >> > >> --- > >> Detalii despre listele noastre de mail: http://www.lug.ro/ > >> > > > IA> --- > IA> Detalii despre listele noastre de mail: http://www.lug.ro/ > > > > -- > Best regards, > Knight > > This message was brought to you by the numbers 0 and 1. > > > --- > Detalii despre listele noastre de mail: http://www.lug.ro/ > --- Detalii despre listele noastre de mail: http://www.lug.ro/
