Цитата: "Определенный порт" для SSH - это 22, обычно пол умолчанию он уже открыт в iptables. Но поскольку ты хозяин сервера, можешь повесить sshd на любой другой незанятый порт. 
    Это я знаю, я iptables вообще пока отключил изза него почему squid не стартовал но не пускает достучаться   
 вот настройки squid    
Код: acl manager proto cache_object 
 acl localhost src 127.0.0.1/32 ::1 
 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1   
 # Example rule allowing access from your local networks. 
 # Adapt to list your (internal) IP networks from where browsing 
 # should be allowed 
 acl localnet src 10.0.0.0/8    # RFC1918 possible internal network 
 acl localnet src 172.16.0.0/12    # RFC1918 possible internal network 
 acl localnet src 192.168.5.0/24    # RFC1918 possible internal network 
 acl localnet src fc00::/7       # RFC 4193 local private network range 
 acl localnet src fe80::/10      # RFC 4291 link-local (directly plugged) machines   
 acl SSL_ports port 443 
 acl Safe_ports port 80        # http 
 acl Safe_ports port 21        # ftp 
 acl Safe_ports port 443        # https 
 acl Safe_ports port 70        # gopher 
 acl Safe_ports port 210        # wais 
 acl Safe_ports port 1025-65535    # unregistered ports 
 acl Safe_ports port 280        # http-mgmt 
 acl Safe_ports port 488        # gss-http 
 acl Safe_ports port 591        # filemaker 
 acl Safe_ports port 777        # multiling http 
 acl Safe_ports port 9081    #edbo 
 acl SSl_ports port 9081        #edbo 
 acl SSL_ports port 443 65023     #SSH 
 acl SSL_ports port 22         #SSH 
 acl CONNECT method CONNECT   
 # 
 # Recommended minimum Access Permission configuration: 
 # 
 # Only allow cachemgr access from localhost 
 http_access allow manager localhost 
 http_access deny manager   
 # Deny requests to certain unsafe ports 
 http_access allow !Safe_ports   
 # Deny CONNECT to other than secure SSL ports 
 http_access allow CONNECT !SSL_ports   
 # We strongly recommend the following be uncommented to protect innocent 
 # web applications running on the proxy server who think the only 
 # one who can access services on "localhost" is a local user 
 #http_access deny to_localhost   
 # 
 # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS 
 #   
 # Example rule allowing access from your local networks. 
 # Adapt localnet in the ACL section to list your (internal) IP networks 
 # from where browsing should be allowed 
 http_access allow localnet 
 http_access allow localhost   
 # And finally deny all other access to this proxy 
 http_access deny all   
 # Squid normally listens to port 3128 
 http_port 8080   
 # We recommend you to use at least the following line. 
 hierarchy_stoplist cgi-bin ?   
 # Uncomment and adjust the following to add a disk cache directory. 
 #cache_dir ufs /var/spool/squid 100 16 256   
 # Leave coredumps in the first cache dir 
 coredump_dir /var/spool/squid   
 # Add any of your own refresh_pattern entries above these. 
 refresh_pattern ^ftp:        1440    20%    10080 
 refresh_pattern ^gopher:    1440    0%    1440 
 refresh_pattern -i (/cgi-bin/|\?) 0    0%    0 
 refresh_pattern .        0    20%    4320